NORTH WAMBO UNDERGROUND MINE EXTRACTION PLAN …...EXTRACTION PLAN LONGWALLS 8 TO 10A NORTH WAMBO...
Transcript of NORTH WAMBO UNDERGROUND MINE EXTRACTION PLAN …...EXTRACTION PLAN LONGWALLS 8 TO 10A NORTH WAMBO...
WAMBO COAL PTY LTD
EXTRACTION PLAN
LONGWALLS 8 TO 10A
EXTRACTION PLAN
LONGWALLS 8 TO 10A
NORTH WAMBO UNDERGROUND MINE
REPORT 4
SUBSIDENCE RISK ASSESSMENT
Operational Risk Mentoring (Salbury Pty Ltd T/A) ABN 56 077 700 077 12 Rhyana Court, Dubbo, NSW, 2830 Ph (+61) 0417 419 709 Email [email protected]
For Wambo Coal Pty Ltd
North Wambo Underground Mine – Longwalls 8 to 10A Subsidence Risk Assessment - REPORT
Report Title: North Wambo Underground Mine – Longwalls 8 to 10A Subsidence Risk Assessment Report
Client: Troy Favell, Environment and Community Manager
By: Peter Standish, Director and Principal Consultant Team Session: 30th October 2014 Job: ORMJ1408 Revision: V2 Date: 1st April 2015
WLWambo Coal Longwalls 8 to
ORMJ1408
DOCUMEN
Ref No.
Title
General De
Key SupporDocumenta
Rev
0 18
1 16
2 0
o 10A Subside
NT DISTRIBU
escription
rting ation
Date
8/12/2014
6/02/2015
1/04/2015
No 1 W
2 Re
3 Op
ence Risk Asse
UTION AND
ORMJ14 North WAssessm
This repstudy cassessmsubsiden
AS/NZS MDG101EDG17 –DevelopStandishSubsidenWambo StatemeWambo of EnviroWambo EnvironmWambo Modifica
Draft report
Finalised rep
Revised to inof Longwall 1
ambo Coal Pt
esource Strate
perational Ris
essment
Ver 2,
D CONTROL
408
Wambo Underment Report
port summariconducted int
ments. It revience due to mi
ISO 31000: 2010 – Minerals– Guideline fopment Consenh, Reardon ence Risk Asses
Coal Pty Lient (2003).
Coal Pty Limonmental Effe
Coal Pty Limmental Assess
Coal Pty Limation Environm
Descr
issued for clie
port with team
ncorporate sho10A
Distributio
Userty Ltd
egies
k Mentoring
01/04/2015
ground (NWU
ses the resulto the NWUews the varioning Longwal
009 Risk Mana Industry Safer Applications
nt DA 305-7-20et al – Northssment Repormited – Wam
ited – Wamboects (2005).
mited – Wambsment (2012).
mited – Wambmental Assess
Versions
ription
ent and team
m comments i
ortened comm
on List of Lat
U) Mine Longw
lts and recomU Longwalls ous aspects als 8 to 10A inc
agement – Priety and Healths for Subsiden003. h Wambo Unrt (2014). mbo Develop
o Seam Unde
bo North Wa. bo North Wamsment (2014).
review
ncluded
mencing end
est Version
walls 8 to 10A
mmended foll8, 9, 10 an
nd impacts oclusive.
inciples and Gh Risk Managence Managem
nderground M
pment Projec
rground Mine
mbo Undergr
mbo Undergro.
Created
P Stand
P Stand
P Stand
Position Troy Favel
Joanna Webs
Records
Subsidence R
low up actionnd 10A subsf the potenti
Guidelines. ement Guidelient Approvals
Mine Longwa
ct Environme
e Modification
round Mine M
ound Mine Lo
d By
dish
dish
dish
ll
ster
Pg 1
Risk
ns from the sidence risk al effects of
ine. s.
alls 7 to 10
ntal Impact
n Statement
Modification
ongwall 10A
Checked
J Webster
J Webster
J Webster
WLWambo Coal Longwalls 8 to
ORMJ1408
TABLE OF C 1 EXEC
1.1 2 DEFIN3 INTRO
3.1 3.2 3.3 3.4 3.5
4 ESTA4.1 4.2 4.3
5 METH5.1
6 IDENT6.1 6.2 6.3 6.4
7 ANAL7.1 7.2
8 ASSE8.1 8.2
9 TREA9.1
10 MONI10.1 10.2 10.3 10.4
11 REFE12 APPE
12.1 12.2 12.3 12.4
o 10A Subside
CONTENTS
ECUTIVE SUMConsolidate
FINITIONS ......RODUCTION
Objectives aClient .........Scope .........External FacThe Team ...
TABLISH THEProject ContRisk ManageKey Assump
THOD .............Key Steps ...
NTIFYING HABackgroundBrain WritinModified HAStatute and
ALYSE RISK ..PrioritisatioReferred Iss
SESS RISK ....Risk AcceptaRisk Ranking
EAT RISKS .....Risk Treatm
NITOR AND RNominated ImplementaCommunicaConcluding
FERENCES ....PENDICES .....
Risk TreatmSystems AppRisk RankingAbout Your
ence Risk Asse
UMMARY .......d Action Plan
........................N ....................and Deliverab............................................
cilitation ...............................
E CONTEXTtext................ement and Or
ptions .....................................
......................HAZARDS AN
Analysis of Dng ...................AZOP ..............Guideline Cro
.....................n ....................
sues .......................................
ability and Risg ....................
........................ent Plan ........
REVIEW ......Coordinator ..
ation Review Ption and ConsRemarks ........
...............................................
ent Plan ........proach to Riskg Tables .........Report ..........
essment
Ver 2,
............................................
.......................
.......................les .........................................................................................................
T ..........................................rganisational C......................
.............................................
ND ISSUES ..Documents .....
......................
......................oss Map .........
...................................................................
.......................sk Criteria ............................
.............................................
.............................................Plan ...............sultation..............................
.......................
.............................................k Treatment ..............................................
01/04/2015
..............................................
........................
......................................................................................................................................
..............................................Context ...............................
............................................................................................................................................................
....................................................................
....................................................................
..............................................
................................................................................................................
........................
................................................................................................................
.............................................
.......................
.....................................................................................................................................
.........................................................................................
.............................................
...............................................................................................................
...................................................................
...................................................................
.............................................
...............................................................................................................
.......................
...............................................................................................................
.....................
......................................................................
......................
......................
......................
......................
..............................................
......................
......................
..............................................
..............................................
......................
......................
......................
..............................................
......................
..............................................
......................
..............................................
..............................................
......................
......................
......................
......................................................................
......................
......................
......................
......................
.............................................
..........................................................................................................................................................
.........................................................................................
.............................................
...............................................................................................................
..................................................................
...................................................................
.............................................
...............................................................................................................
.......................
...............................................................................................................
Pg 2
..................... 4................... 5
..................... 8
................... 10................. 10................. 10................. 10................. 10................. 11
................. 11................. 11................. 12................. 16................ 17................. 17
................... 17................. 17................. 17................. 18................. 18
................... 19................. 19................. 21
................... 22................. 22................. 22
................... 22................. 23
................... 23................. 23................. 23................. 23................. 23
................... 24
................... 25................. 26................. 46................. 48................. 50
4
8 0 0 0 0 0
1
6 7 7 7 7 7 8 8 9 9
2
2
3
4 5 6 6 8 0
WLWambo Coal Longwalls 8 to
ORMJ1408
List of TablesTable 1: ConTable 2: TeamTable 3: PerfTable 4: PrioTable 5: RefeTable 6: Risk Table 7: QuaTable 8: QuaTable 9: QuaTable 10: Ris List of FigureFigure 1: WaFigure 2: AerFigure 3: AerFigure 4: RiskFigure 5: WhFigure 6: Hie
o 10A Subside
s solidated Actim Members ..formance Mearity Issues .....
erred Issues ...Treatment Pllitative Measulitative Measuntitative Mea
sk Ranking Tab
es mbo Coal Min
rial Photograprial Photograpk Criteria "ALA
heel of Safe Prrarchy of Con
ence Risk Asse
ion Plan ...............................asures ........................................................lan .................ures of Likelihures of Conse
asures of Maxble..................
ne Collective Gph of Longwalph of Revised ARP" ..............roduction .......ntrol ...............
essment
Ver 2,
......................
......................
......................
......................
......................
......................hood ..............equence .........imum Reason......................
General Arranls 8 to 10A CoLongwalls 8 to..................................................................
01/04/2015
......................
......................
......................
......................
......................
......................
......................
......................nable Consequ......................
ngement ........onsidered in tho 10A Layout..................................................................
......................
......................
......................
......................
......................
......................
......................
......................uence to Asse......................
......................he October 20........................................................................................
......................
......................
......................
......................
......................
......................
......................
......................ts/Business .........................
......................014 Workshop........................................................................................
......................
......................
......................
......................
......................
......................
......................
......................
......................
......................
......................p ............................................................................................................
Pg 3
................... 5
................. 11
................. 12
................. 20
................. 21
................. 26
................. 48
................. 48
................. 48
................. 49
................. 13
................. 14
................. 15
................. 22
................. 46
................. 47
0
6 8 8 8 9
4
6 7
WLWambo Coal Longwalls 8 to
ORMJ1408
1 EXECU
Wambo Coalwest of Singloperated by Undergroundcommenced
A Subsidenceapproved by
An ExtractionPlanning and
Longwall 10Areport has beWambo Und
This work folcompleted in
The earlier teand Wambo quantity), arc
The team ba
• Imp• Surf• Un-• Re-a
Wam
All identifiedreasonably p
Additional reWCPL will trathe identified
Following the245 metres crisk rankings the subseque
o 10A Subside
UTIVE SUMM
l Mine is an oeton, near thWambo Coal
d Mine is a coin 2005 and i
e Managemen the Departm
n Plan for Lond Infrastructur
A has been inceen prepared erground Min
llows on fromn October 201
eam sessions South Water chaeological s
sed risk asses
pacts on the riface water imdetected chanactivation of smbo seam).
d risks have rispracticable (AL
ecommendatioack and reviewd controls.
e team workscompared to t are required ent environm
ence Risk Asse
MARY
pen cut and ue village of WPty Limited (W
omponent of tnvolves extra
nt Plan (SMP) ent of Primar
ngwalls 7 to 10re on 4 July 20
cluded within to support an
ne (noting tha
m team based 12, and Octob
identified riskDam); subsid
sites, and; imp
ssment undert
ght of way in pacts – particnges in grounsubsidence cra
sk treatment pLARP) or toler
ons were madw these action
shop, the comthe layout conas the changeental risks.
essment
Ver 2,
underground cWarkworth, Ne
WCPL), a substhe approved ction of coal b
for Longwallsry Industries –
0 at the North014.
the approvedn updated Extat extraction o
risk assessmeer 2013.
ks related to: ence impactspacts on neigh
taken in Octo
favour of sevcularly arounddwater condiacking when m
plans (Appendrable after the
de by the teamns – updating
mencing (i.e. nsidered by the in longwall l
01/04/2015
coal mining opew South Walesidiary of PeabWambo Coal by longwall m
s 1 to 6 at the – Mineral Reso
h Wambo Und
d North Wambtraction Plan aof Longwall 7 i
nts facilitated
European Her on overlying hbouring prop
ber 2014 high
eral private pd the confluentions. mining below
dix 1). These e effective imp
ms and these this Risk Asse
south-westerhe team in Octayout would
peration locates (NSW). Thebody Energy AMine. The No
mining method
North Wambources on 11 D
derground Min
bo Undergrouapplication fois complete).
d by Safe Prod
ritage items; Bstreams (Surf
perty access d
hlighted:
roperties. nce of Wambo
existing Why
risks have beeplementation
are included iessment as req
rn) end of Lontober 2014. Iresult in a red
ted approximae Wambo CoaAustralia Pty Lorth Wambo
ds from the W
bo UndergrounDecember 200
ne was approv
und Mine exter Longwalls 8
duction Solutio
Built Featuresface water imduring subside
o and Stony Cr
ybrow seam w
en assessed bof the identif
in Table 1. Thquired, and co
ngwall 10A wat is considere
duction in env
ately 15 kiloml Mine is own
Limited. The NUnderground
Wambo Seam.
nd Mine (WCP06.
ved by the De
ent. This risk ato 10A at the
ons P/L which
s (particularly pacts – qualit
ence of tracks
reeks.
workings (sittin
y the team tofied controls a
he teams undeonfirm the ad
as shortened bd that no cha
vironmental im
Pg 4
metres (km) ed and
North Wambo Mine
PL, 2006) was
epartment of
assessment e North
h were
powerlines ty and .
ng above the
o be as low as and actions.
erstood that equacy of
by nges to the
mpact and
WamLong
OR
1.1TheAct
I
A
A
A
A
A
A
A
A
mbo Coal gwalls 8 to 10A Sub
MJ1408
1 Consolidatede following table prtions were re-evalu
ID Session
A1 1
A2 1
A3 1
A4 1
A5 1
A6 1
A7 1
A8 1
sidence Risk Asses
d Action Plan resents consolidateated and additiona
Ref
IS007 Compleand 8.
IS056 Complesufficiepipelin
IS061 Reviewto the eSalvage
IS097 Establisimpact
IS066 IS094
Reviewimplicasurface
IS067 IS092
Develomeasur
IS068 Confirmseam dsufficie
IS075 CompleInrush and defollow pressur
sment
Ver 2, 01/04/
d follow up actionsal actions identified
ete proposed monit
ete monitoring of tent slack in any affees.
w implications for thedge of subsidencee and Management
sh a register of WCed by subsidence (a
w Site Water Managations of changed sue storage capacities
p an Ausgrid liaisonres well ahead of su
m surface storage cdewatering and thatent.
ete the establishmeManagement Plan watering strategy fquantification of thre of water and inte
/2015
s identified during tduring each risk as
Table 1
Description
toring bore installa
he fixed points andected mine dewater
he identified scarrede in accordance witht Programme.
PL items which couadd to services plan
gement Plan to consurface relative leves.
n process to develoubsidence effects b
apacity to take watt the installed infra
ent of the inrush cofor adjacent Wamb
for the old workingshe risks with knownegrity of the barrier
he risk assessmentssessment worksho
: Consolidated Ac
tion over LWs 7
provision of ring discharge
d tree proximate h the approved
uld potentially be n).
sider the els (RLs) and
op mitigation being experienced.
ter from Whybrow structure will be
ontrol zone in the bo seam workings s. [This should
n quantities and r.]
Pg 5
workshops conducp.
ction Plan
Respo
NWU Technical SSuperintendent
WCPL Technical Coordinator
WCPL EnvironmeCommunity Man
NWU Technical SSuperintendent
WCPL EnvironmeCommunity Man
WCPL Technical Coordinator
NWU Technical SSuperintendent
NWU Technical SSuperintendent
cted in October 201
onsible
Services
Site Services
ent and nager
Services
ent and nager
Site Services
Services
Services
12, October 2013 an
Due
19/12/2012 C
30/3/2013 C
30/3/2013 CaMP
30/11/2012 CB
30/3/2013 C
30/11/2012 C
3/1/2013 C
30/3/2013 C
nd October 2014.
Comment
Complete.
Complete.
Complete - Coveredapproved Salvage aManagement Programme.
Complete - IncludedBFMP.
Complete.
Complete - in BFMP
Complete.
Complete.
d by nd
d in
P.
WamLong
OR
I
A
A
A
A
A
A
A
A
A
A
A
A
mbo Coal gwalls 8 to 10A Sub
MJ1408
ID Session
A9 1
A10 1
A11 1
A12 1
A13 1
A14 2
A15 2
A16 2
A17 2
A18 2
A19 2
A20 2
sidence Risk Asses
Ref
IS076 Develobackfill
IS086 ConsideWorkshthe equnot like
IS087 Reviewworkin
IS039 IS093
Includein the B
IS095 Reviewinside t
IS100 Check p
IS100 ConsultHomes
IS105 Review
IS106 Provide
IS110 Conducstructu
IS114 Reviewunder t
IS040 Check T
sment
Ver 2, 01/04/
p an audit/monitorl project.
er getting structurahop prior to subsidiuipment held in thiely to be affected b
w the condition of thgs prior to subsidin
e communication wBFMP.
w predicted subsidethe Homestead pit predicted subsiden
t GML regarding thstead Complex Mine
w monitoring data fr
e latest geological d
ct a dam re-commisural engineering ass
w the surface water the creek (including
Telstra lines in prox
/2015
Description
ring process for the
al engineering revieing. [This should ins location and movy mining.]
he portal seals to thng.
with the Electrical En
nce and against drashell. ce for extending LW
e affects if any on te Management Plan
rom LW 5 to validat
data for review.
ssioning risk assesssessment prior to re
ponding effects frog existing reports).
ximity to LW 9 and
e Homestead
ew of Homestead nclude reviewing ement to an area
he Homestead
ngineer in Charge
ainage paths
W 9 and 10.
the Wambo n.
te existing model.
ment and e-commissioning.
om leaving a pillar
10 to verify.
Pg 6
Respo
NWU Technical SSuperintendent
WCPL Technical Coordinator
NWU Technical SSuperintendent
NWU Technical SSuperintendent
NWU Technical SSuperintendentNWU Technical SSuperintendent
WCPL EnvironmeCommunity Man
WCPL EnvironmeCommunity Man
NWU Technical SSuperintendent
NWU Technical SSuperintendent
WCPL EnvironmeCommunity Man
NWU Technical SSuperintendent
onsible
Services
Site Services
Services
Services
Services
Services
ent and nager
ent and nager
Services
Services
ent and nager
Services
Due
31/10/2012 Cfi
30/3/2013 C
30/3/2013 C
30/11/2012 CB
30/3/2013 C
30/11/2013
CtA
30/11/2013
CatC
30/11/2013
CtA
30/11/2013
Cf
At time
At time CiA
30/11/2013
Cl
Comment
Complete - Internalfortnightly status remplemented.
Complete.
Complete.
Complete - IncludedBFMP.
Complete.
Complete – includethe Subsidence Assessment.
Complete – no additional subsidenthe Wambo HomesComplex curtilage.
Complete – includethe Subsidence Assessment.
Complete – reviewefor Extraction Plan.
-
Complete – addressn the Subsidence
Assessment.
Complete – no Telstines present.
eport
d in
d in
ce in tead
d in
ed
sed
tra
WamLong
OR
I
A
A
A
A
A
A
A
mbo Coal gwalls 8 to 10A Sub
MJ1408
ID Session
A21 3
A22 3
A23 3
A24 3
A25 3
A26 3
A27 3
sidence Risk Asses
Ref IS048 IS096
Confirm– with by the
IS056 ReviewLW 10A
IS068 Confirmabove overlyi
IS078 Review
IS117 IS120
Reviewactivitie
IS010 IS119
ReviewparticuLease.
IS121 Review
sment
Ver 2, 01/04/
m if there are any wbore locations (andteam of 30/10/14.
w provision of slack A. m greater intensity Longwall 8b (to addng Whybrow seam
w additional piezom
w location of LW10Aes on Wambo Cree
w monitoring bore rularly to the south n
w piezometer trigge
/2015
Description wells or bores in thed their decommissio
for discharge and o
of monitoring or otdress potential failuworking).
eter holes.
A in relation to prevk.
equirements for LWnear the boundary o
rs for Wambo Cree
e vicinity of LW10A oning) unknown
other lines over
ther strategy ure of backfill in
vious grouting
W 10A – of the Mining
ek (P109).
Pg 7
RespoNWU Technical SSuperintendent
NWU Technical SSuperintendentNWU Technical SSuperintendent
WCPL EnvironmeCommunity Man
WCPL EnvironmeCommunity Man
WCPL EnvironmeCommunity Man
WCPL EnvironmeCommunity Man
onsible Services
Services
Services
ent and nager
ent and nager
ent and nager
ent and nager
Due At time W
aIPAp
31/1/2015 C
31/1/2015 CviSP
31/1/2015 CiE
31/1/2015 Ca
31/1/2015 Ccse
31/1/2015 Ccse
Comment
Wells and bores areassessed under NWnrush Managemen
Plan and Inrush Authority to Mine process.
Complete
Complete – increasevisual monitoring ncorporated into
Subsidence MonitoProgram
Complete – addressn Attachment 2 of
Extraction Plan
Complete – outsideangle of draw.
Complete – in consideration of shortened commenend of LW 10A
Complete – in consideration of shortened commenend of LW 10A
e WU
t
ed
ring
sed
e
ncing
ncing
WLWambo Coal Longwalls 8 to
ORMJ1408
2 DEFIN
The following
Ter
ALARP
Aspect
BFMP
Causal Pat
GWMP
Hazard
HAZOP
Impact
Incident
Inherent/IRisk
Inspection
Instrumen
Issue
LMP
LW
NWU
NWCSRS
o 10A Subside
ITIONS
g table provid
m
“Alevga
A thcopr
Abmiman
thway
A unprdifinc
Abmim
A
MincAS
A enim
A Syoc
Initial Thco
n A ha
nt Tedoor
Is prre
AbpoPr
Ab
Ab
Ab
ence Risk Asse
des guidance o
As Low As Reavels that can b
ained.
classification ought of as m
ontamination roduces a subs
bbreviation – anagement o
mpacts to publnd surrounds.
term used to nwanted outcreventative cofferent severicident to succ
bbreviation – onitoring grou
mpacts.
thing or a situ
ethod of analcidents and pS/IEC 61882-2
result of risk nnd result of th
mpact that incl
step in the caystem requiredccurs. An incid
he risk associaontrols is take
regular checkazards and def
erm used to document whicrganisation.
used in the dorocess generaquirement, ba
bbreviation – otential enviroroject area an
bbreviation –
bbreviation –
bbreviation –
essment
Ver 2,
on terms used
sonably Practbe achieved w
of risk normamechanisms of
or loss; land csequent envir
Built Featuresbjectives and lic infrastructu
describe the ome. The flow
ontrols and incty outcomes.
cessful mitigat
Ground Wateundwater con
uation with po
lysing mining rompt for req
2003 Hazard a
normally usede realisation oludes loss of h
usal pathwayd preventativdent is NOT a
ated with an un into accoun
k of workplaceficiencies.
escribe eitherch imposes ob
ocument to dlly. An issue cackground inf
Land Manageonmental cond surrounds.
Longwall – th
North Wambo
North Wambo
01/04/2015
d throughout t
Ex
ticable”. The lwithout dispro
lly applied to f harm – or cachanges, or; faronmental “im
s Managemenperformance
ure and all cla
“flow” of evew is typically ccidents reduc A causal path
ting controls t
er Monitoring nditions and p
otential to cau
operations, pquired controlnd operability
d when considof an “aspect”habitat for wa
y which descrie controls havrisk as it shou
unwanted event.
e equipment, w
r statute, stanbligations on t
escribe any pcan be any of formation or g
ement Plan – Asequences du
e key method
o Undergroun
o Creek Subsi
this report.
xplanation
evel of risk beoportionate ex
environmentauses of loss. auna/flora cha
mpact”.
nt Plan – a doce measures to asses of other
nts beginningcauses prevened in severityhway is a causto outcome.
Program – a dpotential chan
use loss.
lant or process. Guidance oy studies (HAZ
dering environ”. For examp
ater dwelling f
bes the point ve failed or beuld not be des
nt before any
working envir
ndards, policiehe site and th
oint raised bycause, hazardgeneral point
A document oue to potentia
d of secondary
nd.
dence Respon
etween toleraxpenditure in
al matters. “ATypical aspecanges. Each o
cument to idemanage potebuilt features
from a root cnted from becy by mitigatingse to failed pr
document defges due to po
sses to identifon the methoZOP).
nmental mattele – surface wfauna and flor
at which conteen circumvenscribed as a co
y consideratio
ronment and
es or other leghe personnel f
y the team or d, incident, corelated to the
outlining the mal subsidence i
y extraction co
nse Strategy.
able and intolerelation to th
Aspects” are bcts are: surfacof these aspec
entify proposeential subsidens within the P
cause and leadcoming incideg controls whireventative co
fining an approtential subsid
fy potential cad is available
ers. Impacts awater changes ra.
trol of pathwanted when anonsequence.
n of the existi
practices, to i
gal or corporatfilling roles in
in the risk revontrol, outcome subject area
management oimpacts withi
onsidered.
Pg 8
erable he benefit
best e water cts
ed nce roject area
ding to an nts by ch lead to
ontrols to
roach to dence
auses of in
are the have an
ay is lost. n incident
ing
dentify
te the
view me (risk), a.
of n the
WLWambo Coal Longwalls 8 to
ORMJ1408
Ter
Personnel
Practicabl
Residual R
Review
Risk
Risk Mana
SGWRP
SWMP
WCPL
WMP
o 10A Subside
m
Invis
e Thbe
Risk Thm
Anco
Thwi
agement Thof
Ab
Ab
Ab
Ab
ence Risk Asse
cludes all peositors, consult
he extent to west practices in
he risk associaeasures is tak
n examinationomponents.
he combinatioith the likeliho
he systematic f identifying, a
bbreviation –
bbreviation –
bbreviation –
bbreviation –
essment
Ver 2,
ople working itants, project
which actions an existence an
ated with an uken into accou
n of the effect
on of the poteood of the haz
application oanalysing, asse
Surface and G
Surface Wate
Wambo Coal
Water Manag
01/04/2015
Ex
n and aroundmanagers, et
are technicallynd under oper
unwanted eveunt.
tiveness, suita
ential consequzard actually r
f managemenessing, treatin
Groundwater
er Monitoring
Pty Ltd.
gement Plan.
xplanation
the site (e.g. c.).
y feasible, in vrating circums
nt after consi
ability and effi
uences arising resulting in an
nt policies, prong and monito
Response Pla
Program.
all contractor
view of cost, cstances of the
deration of th
ciency of a sy
from a specifn unwanted ev
ocedures and oring risk.
n.
rs, sub-contra
current knowle time.
he existing con
ystem and its
fied hazard tovent.
practices to t
Pg 9
ctors,
ledge and
ntrol
ogether
the tasks
WLWambo Coal Longwalls 8 to
ORMJ1408
3 INTRO
3.1 ObjeThe primary
• Use• Use• Dev• Invo
(haz• Prio• Dete• Iden• Doc
3.2 ClienThe client fo
3.3 ScopOn the 30th Oparticipated was:
hi
The risk asse
• Esta• Iden
− B− M− G
(o
• Ana• Ran
This OctoberLongwall 10A
3.4 ExterThe team sescompany spe
o 10A Subside
ODUCTION
ectives and objectives of
the risk asses the risk asses
velop parametolve a cross sezard) identificoritise identifieermine the crntify recommecument the pr
nt r the risk asse
pe October 2014,in a facilitated
“To conduct aigh-risk levels
m
essment works
ablishing the cntifying risks vBrain storminModified hazaGap analysis a(DA-305-7-20of EDG17 – Gu
alysis of identinking of the ris
r 2014 risk assA in addition t
rnal Facilitassion on 30 Oecialising in ris
ence Risk Asse
Deliverablethis risk asses
ssment to idessment as inpters for inclusection of WCPation processed issues; riticality of conended actionsrocess and the
essment is Tro
, a team consid risk assessm
a risk assessmand/or poten
measures are a
shop included
context includvia a number og; ard and operaagainst the su03) and the feuideline for Afied risks and
sks, including
sessment teamto Longwalls 8
ation ctober 2014 wsk assessment
essment
Ver 2,
es ssment were t
ntify items tout into the prion in other m
PL, subject mas;
ntrols; s for follow upe results.
oy Favell, WCP
isting of WCPment worksho
ment with an entially severe capplied such t
d:
ding review ofof Risk Manag
ability analysisbsidence imp
eatures that mpplications fo nomination oconsideration
m studied and8 to 10 which
was facilitatedt and risk man
01/04/2015
to:
be addressedreparation of tmanagement p
tter experts, d
p; and
PL Environmen
L technical anp on Longwal
emphasis on idconsequencesthat the residu
f supporting ingement techn
s; and pact performamay be affecteor Subsidence of key potentin of mitigation
d extended exhad not been
d by Dr Peter Snagement pro
d in the Extracthe Extractionplans; decision make
nt and Comm
nd environmenls 8 to 10A inc
dentifying thos. To confirm ual risk rankin
nformation aniques, includi
nce measuresed by undergrManagement
ial environmen measures.
isting conside fully conside
Standish of Oocesses.
ction Plan (ann Plan for Long
ers and key st
unity Manage
ntal staff and clusive. The s
ose subsidencethat adequate
ng is tolerable
nd objectives; ng:
s in the Develoround coal mit Approvals.
ental issues; an
erations to incred by earlier
perational Ris
d related plangwalls 8 to 10
akeholders in
er.
specialist conscope of the w
e impacts withe risk treatme
e.”
opment Consening listed in A
nd
clude implicatr teams.
sk Mentoring –
Pg 10
ns); 0A;
n the issue
nsultants workshop
h ent
ent Appendix B
ions of
– a
WLWambo Coal Longwalls 8 to
ORMJ1408
3.5 The TThe first teamorder to takerelating to LoA second tea(Longwalls 9 A third team(Longwall 10qualification
Name
Peter Standish
Michael Millg
Troy Favell
Tim Britten
Mal Walker
James Barbato
Noel Merrick
Darrell Rigby
Joanna Webst
Team membmembers ref
4 ESTAB
4.1 ProjeThe North Wof Peabody EWambo CoalA Subsidenceapproved by
o 10A Subside
Team m met on 10 Oe advantage oongwalls 7 andam met on 2 O
and 10). met on 30 Oc
0A). Details of s and experie
h OperatioMentorFacilitat
ate WCPL – TechnicSuperintWCPL – and ComManageWCPL – DirectorWamboWCPL – Surveyo
o Subside
HeritageDirector
RPS AusPacific –Archaeo
ter ResourcProject
er “goals” weflecting on the
BLISH THE CO
ect ContextWambo Underg
Energy Austral Mine (refer te Managemen the Departm
ence Risk Asse
October 2012of an approprid 8.
October 2013
ctober 2014 athe team mence is include
Role onal Risk ing –
tor
NWU al Services tendent Environment
mmunity er
Project r South
o Underground Chief
or nce Engineer
e Computing – r
stralia Asia – ologist ce Strategies – Manager
ere used to coese goals tow
ONTEXT
t ground Mine lia Pty Limitedto Figure 1) annt Plan (SMP) ent of Primar
essment
Ver 2,
at the WCPLate mix of ski
at the WCPL s
at the WCPL simbers presen
ed in Table 2.
Table
QuPhD, B Eng (Trained. CerManager; 33and open cumanagerial aexperience. assessmentsB Survey, Reyears indust
B Sc (Ecologexperience a
B Sc (Geol), Mine Strata over 20 yearB Survey, Sta30 years indB Eng (Civil),subsidence ePhD (GroundData Proc, M(Physics), Grindustry expB Arts (Archyears archae
B Eng (Env); managemenindustry.
nfirm that initards the end o
is a longwall cd. The North nd commencefor Longwalls
ry Industries –
01/04/2015
site, near Singlls and experi
site to identify
ite to identifynt during the l
2: Team Me
alifications and(Hon), Dip Bus Mrtificate of Com3 years experieut mining operaand contract mInvolved in fac
s for 15 years.egistered Mine try experience.
y & Botany), ovat the Wambo
M Eng (GeotecControl and Ve
rs industry expeatutory Surveyoustry experienc,10 years experengineer. dwater Manage
MSc (Research Grad Course in Hperience. aeology & Palaeological exper
5 years experient and project a
tial expectatioof the session
coal mining opWambo Unde
ed in 2005. s 1 to 6 at the – Mineral Reso
gleton, NSW. ence to ident
y issues relati
issues relatinatest risk asse
embers
d Experience Mgt, Risk Analy
mpetence as a nce in undergro
ations with opemanagement
ilitating risk
Surveyor; over
ver 5 years Coal Mine.
h), Diploma in entilation, VO's erience. ors Registrationce. rience as a
ement), Grad DGeophysics), BSydrology; 40 ye
eontology); oveience.
ence environmapprovals in res
ons of the tean.
peration owneerground Min
North Wambources on 11 D
A team-basedify potential lo
ng to subsequ
ng to additionaessment work
10/1ysis
ound rating,
✓
10 ✓
✓
Coal ticket;
✓
n, over
✓
Dip Sc ears
✓
er 10 ✓
ental source
✓
m session we
ed and operate is a compon
bo UndergrounDecember 200
d approach woss scenarios/
uent longwall
al longwall mikshop and the
10/12 2/10/1✓
✓ ✓
✓ ✓
✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
ere met – with
ted by WCPL, nent of the ap
nd Mine (WCP06.
Pg 11
as utilised in /issues
mining
ining eir relevant
13 30/10/14✓
✓
✓
✓
✓
In absentia
✓
✓
✓
h the team
a subsidiary pproved
PL, 2006) was
WLWambo Coal Longwalls 8 to
ORMJ1408
Extraction of
An extractionExtraction Pl
Extraction ofExtraction of
This risk asseinclusive at t
More informwww.peabodFollowing the245 metres cthe worksho
It is considerreduction in
4.2 Risk The developmsubsidence r
Wollo
Wolle
WarkWoo
WhitBlakeWooBox W
WamComp
All bu
Publi
The extractio1. Risk2. Extr3. Nor4. Extr5. Risk6. Rev7. Risk8. Rev
o 10A Subside
f Longwalls 1 t
n Plan for Lonan was appro
f Longwall 7 wf Longwall 9 w
essment reporthe North Wam
mation on the dyenergy.come team workscompared to tp is provided
red that no chenvironment
Managemement consent
risks posed by
Feature
ombi Brook
emi National
kworth Sands dland Commu
e Box, Yellowely’s Red Gumdland/Grassy Woodland Com
mbo Homesteaplex
uilt features
c Safety
on plan reviewk Assessment raction Plan forth Wambo Unraction Plan fok assessment ivise Extractionk assessment ivise Extraction
ence Risk Asse
to 7 is comple
ngwalls 7 to 10oved by the NS
was completedwas completed
rt has been prmbo Undergro
mine and its om.au. shop, the comthe layout conin Figure 2 an
anges to the al impact and
ent and Orgt outlines a ra mining. Thes
NCr
Park NN
unity MN
Box, m,
White mmunity
MN
ad Nb
ASsDr
N
w process invofor Longwalls
or Longwalls 7nderground Mor Longwalls 7including Long
n Plan for Longincluding Long
n Plan for Long
essment
Ver 2,
ete.
0 was lodged SW Departme
d in January 2d in Decembe
repared to supound Mine.
operation can
mencing (i.e. nsidered by thnd the revised
risk rankings a the subseque
ganisationange of perfore subsidence
Table 3: P
Negligible impControlled relrequirements
Negligible subNegligible env
Minor crackinNegligible env
Minor crackinNegligible env
Negligible impby the Heritag
Always safe.Serviceability serviceability Damage mustreplaced or fu
No additional
olved the follo 7 and 8 cond
7 and 8 approvMine Modifica7 and 8 approvgwalls 9 and 1gwalls 7 to 10gwall 10A – cogwalls 8 to 10
01/04/2015
in February 20ent of Planning
014. Extractior 2014. Extrac
pport an Extra
be found on
south-westerhe team in Octd layout is sho
are required aent environm
al Contextmance measuimpact perfo
PerformanceSubsidence
pact.ease of exces.
bsidence impavironmental c
ng and pondinvironmental c
ng and pondinvironmental c
pact on heritage Branch and
should be mamust be fully
t be fully repaully compensa
risk.
owing key stepducted on 10 Oved on 16 Mation for Longwved on 24 Sep10 – conducte – lodgementonducted on 3A – lodgemen
014 and subseg & Environm
on of Longwalction of Longw
action Plan ap
the company’
rn) end of Lontober 2014. Twn in Figure 3
as the change ental risks.
ures regardingrmance meas
MeasuresImpact Perfo
ss site water o
acts.onsequences
g of the land onsequences
g of the land onsequences
ge values, und/or the Minis
aintained whecompensatedirable, and m
ated.
ps: October 2012ay 2013 for Lowalls 9 and 10ptember 2013ed on the 2 Oc
in June 2014;30 October 20nt early 2015.
equently revisent on 4 July
l 8 was complwall 10 is curre
pplication for
’s website at:
ngwall 10A waThe layout con3.
in longwall la
g the potentiasures are show
ormance Meas
only in accorda
.
surface or oth.
surface or oth.
less approval ster.
erever practicad. ust be fully re
; ongwall 7; 0 was approve3 for Longwallctober 2013; ; 014; and
sed in June 202014.
leted in July 2ently underwa
Longwalls 8 to
as shortened bnsidered by th
ayout would r
al consequencwn in Table 3.
sure
ance with EPL
her impact.
her impact.
has been gra
able. Loss of
epaired or else
ed on 8 July 20 8;
Pg 12
014. This
2014. ay.
o 10A
by he team at
esult in a
ces of
L
nted
e
013;
WARKWORTH
CL 365
CL 397
ML 1572
CL 374
CCL 743
WOLLEMI NATIONAL PARK
Hunter ValleyOperations
Colliery
Hunter ValleyOperations
Mount ThorleyWarkworth
Administration Access Road(Not Constructed)
CHPP
WamboAccess Road
CHPPPortal
E 31
0 000
E 31
5 000
E 30
5 000
ML 15
94
United
ML 1594
ML 1402
LEGENDMining and Coal Lease BoundaryWCPL Owned LandRemnant Woodland Enhancement Program(RWEP) AreaExisting/Approved Surface Development AreaApproved Open Cut LimitApproved Underground DevelopmentExtraction Plan Application AreaLongwalls 8 to 10A
0 2000
MetresGRID DATUM MGA 94 ZONE 56
500
Approved MontroseWater Storage
(Not Yet Constructed)
N 6 395 000 N 6 395 000
E 31
0 000
E 31
5 000
E 30
5 000
N 6 390 000
LW 1
LW 2
LW 3
LW 4
LW 5
LW 8a
Administration Buildingsand Workshops
Product CoalConveyor
LW 6
LW 7
North Wambo Creek Diversion
Arrowfield and BowfieldUnderground Mines
North WamboUnderground Mine
Previous Alignment ofNorth Wambo Creek
LW 9
LW 10
LW8b
South Bates -Whybrow
Underground Mine
Wambo CoalTerminal
North WamboUnderground MineLongwalls 8 to 10A
Wambo HomesteadExclusion Zone
LW 10
A
Wambo SouthWater Dam
Wambo Coal MineCollective General Arrangement
FIGURE 1
W A M B O C O A L M I N E
WAM-09-15_EP LW8-10A_Risk_102B
CL 743
CCL 743
CHPP
North WamboUnderground Mine
ML 1402CL 397
Wambo SouthWater Dam
LW 1
LW 2
LW 3
LW 4
LW 5
LW 6
LW 7
LW 8a
LW 9
LW 10
LW 8b
LW 10
A
CL 365
B A
D
C
D Extension
N 6 392 000
E 31
0 000
E
310 0
00
E 31
2 000
N 6 394 000N 6 394 000
E 30
8 000
E 31
2 000
E 30
8 000
North WamboUnderground MineLongwalls 8 to 10A
0
Metres
500
LEGENDMining and Coal Lease BoundaryWCPL Owned LandRemnant Woodland Enhancement Program(RWEP) AreaExisting/Approved Surface Development AreaExisting/Approved Approved Open Cut LimitApproved Underground DevelopmentWollombi Brook Protected LandWollombi Brook Mapped Alluvium ExtentMapped Alluvium ExtentBase of Wollemi National Park EscarpmentExtraction Plan Application AreaLongwalls 8 to 10A
GRID DATUM MGA 94 ZONE 56
Wambo HomesteadExclusion Zone
ML 1594
WOLLEMINATIONAL
PARK
Homestead BackfillProject Area
Arrowfield and BowfieldUnderground Mines
South Bates - WhybrowUnderground Mine
Aerial Photograph of Longwalls 8 to 10AConsidered in the October 2014Workshop
FIGURE 2
WAM-09-15_EP LW8-10A_RISK_101B
W A M B O C O A L M I N E
CL 743
CCL 743
CHPP
North WamboUnderground Mine
ML 1402CL 397
Wambo SouthWater Dam
LW 1
LW 2
LW 3
LW 4
LW 5
LW 6
LW 7
LW 8a
LW 9
LW 10
LW 8b
LW 10
A
CL 365
B A
D
C
D Extension
N 6 392 000
E 31
0 000
E
310 0
00
E 31
2 000
N 6 394 000N 6 394 000
E 30
8 000
E 31
2 000
E 30
8 000
North WamboUnderground MineLongwalls 8 to 10A
0
Metres
500
LEGENDMining and Coal Lease BoundaryWCPL Owned LandRemnant Woodland Enhancement Program(RWEP) AreaExisting/Approved Surface Development AreaExisting/Approved Approved Open Cut LimitApproved Underground DevelopmentWollombi Brook Protected LandWollombi Brook Mapped Alluvium ExtentMapped Alluvium ExtentBase of Wollemi National Park EscarpmentExtraction Plan Application AreaLongwalls 8 to 10A
GRID DATUM MGA 94 ZONE 56
Wambo HomesteadExclusion Zone
ML 1594
WOLLEMINATIONAL
PARK
Homestead BackfillProject Area
Arrowfield and BowfieldUnderground Mines
South Bates - WhybrowUnderground Mine
Aerial Photograph ofRevised Longwalls 8 to 10A
FIGURE 3
WAM-09-15_EP LW8-10A_RISK_103A
W A M B O C O A L M I N E
WLWambo Coal Longwalls 8 to
ORMJ1408
The assessm• Rele• Com• Req• Stru• Ope• Rele• Prev• Oth
4.3 Key AThe identificengineering/managemen
• TheUnd
• All Imp
• Riskcon
• Inru• No i• Wam
− −
• Rem
o 10A Subside
ent of risks haevant criteria mmunity consquirements byuctural toleranerational licenevant guidelinvious observaer relevant in
Assumptionation of key a/project decist process. Ke
risk assessmderground Mincommitments
pact Statemenk ranking wassideration of
ush Preventioninstallation ofmbo South W
Wambo Sou Re-commissmoval/disposa
ence Risk Asse
as also referredefined by staultation findin
y local and stances of man-mnses of public nes published ations/informanformation ma
ns assumptions isions. It is impoy assumption
ment relates ne only; s made in ap
nt) or controls s undertakenremediation; n and Managef new infrastru
Water Dam willuth Water Damsioning will beal of the water
essment
Ver 2,
ed to: atutory requirngs; te governmen
made surfaceutilities whichby the NSW G
ation collectedade available
s a critical parortant that ths applied duri
to the extra
pproval documcurrently allo
n on the bas
ement is still iucture (e.g. gal be re-used am will be dewe under a separ from the dam
01/04/2015
rements;
nt agencies wstructures;
h may be affecGovernment; d in the area; to the team.
rt of the risk ahese assumptiing the risk as
action of Lo
mentation (e.ocated to a wois of conseq
n place for LWas bores); fter mining;
watered (but marate review/rm and the ove
ith responsibi
cted by subsid
and
ssessment proons are valida
ssessment pro
ngwalls 8 to
.g. the Wambork stream weuences being
W 9, 10 and 10
may still have srisk assessmeerlying workin
ilities in the ar
dence in the p
ocess – forminated and revieocess were:
o 10A inclusiv
bo Developmeere taken to bg in excess o
0A;
some residuant; and
ngs will be ma
rea;
proposed min
ng the basis foewed as part o
ve at the N
ent Project Ebe “planned coof approved
l water left in
anaged approp
Pg 16
ing area;
or many of the risk
orth Wambo
Environmentalontrols”; levels and in
the dam);
priately.
o
l
n
WLWambo Coal Longwalls 8 to
ORMJ1408
5 METH
5.1 Key SThe key step
1. Back2. Faci
Menand
3. Facia. b. c. d. e.
f.
g. h. i. j.
4. Com5. Fina6. Upd
a. b. c.
d.
6 IDENT
6.1 BackThe various dcontrols iden
6.2 BrainBrain writingintended to pprocess invo
1. Quie2. Grou
refin3. Key
the
o 10A Subside
OD
Steps s in the risk akground analylitation of a sc
ntoring) with dkey outcomelitation of a te
an open disc presentation brainstormi review of ea modified HA
which could cross mappi
and surface EDG17 to co
prioritisatio risk ranking
identificatio generation omplete draft realise the repordate the repor Overview of Identificatio Review and
inclusive; an Identify any
IFYING HAZA
kground Andocuments lisntified for the
n Writing g is a techniqupromote crealves: et reflection –up discussionnement of eacword associasubject.
ence Risk Asse
ssessment proyses on the sucoping sessiondecision maki
es sought; eam-based ancussion with tn by Troy Faveng (writing) toarlier Risk AsseAZOP - reviewd contribute toing to the appand sub-surfa
onfirm all itemn (of identifieof the outcom
on of planned of an action peport to AS/Nrt and issue asrt based on thf new aspects
on of aspects aupdate contr
nd y new addition
ARDS AND I
alysis of Dosted in the Ref
operation.
ue based on thtive thought a
– where indivin – with each ch issue based
ation (where r
essment
Ver 2,
ocess were: ubsidence issun (developed ing personnel
nalysis to evalthe team on “ell on the subo capture genessment stud
wing an aerial po/be affected plicable subsidace features t
ms have been ed items) – thrmes shown in (existing) and
plan to compleZS ISO 31000s a controlled e second andand impacts;
and impacts srols and risk ra
nal actions (re
SSUES
ocuments ferences secti
he work of de amongst a gro
duals write thperson in th
d on input frorelevant) to id
01/04/2015
ues and experby Resource S to discuss sco
uate and trea“what do we wsidence expeeral issues; ies; photo view ofby subsidenc
dence impact that may be afaddressed; rough a votingthe confirme
d additional coete the identif:2009 standarcopy for ongo third team re pecific to LW ankings in the
ecommendatio
ion were revie
Bono (who boup of people
heir thoughts he team takin
m other teamdentify additio
iences for theStrategies andope material,
t risks, comprwant to achievriences at Nor
f the mine to ie; performance ffected by und
g system condd risk and con
ontrols to mitified additionard for review boing use; andeviews, includ
9, 10 and 10A Risk treatme
ons).
ewed to deter
uilt on the woe. As applied b
on the subjecg a turn to re
m members whonal Issues fo
e North Wambd communicatand to confir
rising: ve” in relationrth Wambo U
identify poten
measures in tderground co
ducted by the ntrol chart; igate risk leve
al controls; by personnel;
ding:
A; nt Plan consid
rmine the nat
ork of Alex Faiby Operationa
ct onto paper ead out one ho had similarr the register
bo Undergrouted to Operatm the risk ana
n to the analysnderground M
ntial surface fe
the Developmal mining in A
team;
els to a tolerab
dering LW 8 to
ture of specific
ickney Osbornal Risk Mento
or card(s); of their issuer items on thebased on con
Pg 17
nd Mine; ional Risk alysis process
sis; Mine;
eatures
ment Consent Appendix B of
ble state; and
o 10A
c threats and
ne) and is ring, the
es – and theneir list; and nnection with
n
h
WLWambo Coal Longwalls 8 to
ORMJ1408
6.3 ModAn aerial phoconnected wrisk register f
6.4 StatuThe main gui
• Sub• Surf
EDG
These documissues (hazar
o 10A Subside
dified HAZOotograph of th
with the varioufrom the team
ute and Guiidance informsidence impaface and sub-s
G17 – Guidelin
ments providerds or controls
ence Risk Asse
OP he mine was uus aspects of pm session (sho
ideline Crosmation conside
ct performansurface featurne for Applica
ed a range of ps) for conside
essment
Ver 2,
used to identifpotential harmown in Table 6
ss Map ered comprisece measures ires that may btions for Subs
points which wration.
01/04/2015
fy potential sum. The outpu6).
ed: in the Developbe affected bysidence Mana
were consider
ubsidence impt from this pro
pment Conseny undergroundgement Appr
red by the tea
pacts – with kocess was add
nt (DA 305-7-d coal mining ovals.
am and used t
key word promded to the ove
2003); and listed in Appe
o generate ad
Pg 18
mpts er-arching
endix B of
dditional
WLWambo Coal Longwalls 8 to
ORMJ1408
7 ANALY
Analysis of idorganisation the event ocRisk analysis likelihood of
The element
1. Conprev
2. Idenincid
3. Deteoppimpetc.)
4. Detemitiprod
5. Estimmat
6. IdenThis techniqunot scored –
• Uncmisof ri
• Beinfunccominst
• Beinassi
Priority issue
7.1 PriorThe key potenumber of “vBased on Opimplicated inthe losses arSome 10% ofallocate agai
1 This division
team genera
o 10A Subside
YSE RISK
dentified issueor the import
curring with ainvolves detethat event oc
ts of risk level sider the causventative contntify existing mdent; ermine the coortunity. Whacted (e.g. ou); ermine the likgating controduct of the prmate the leverix; and
ntify and consue was appliewhich flows f
certainty – if tleading, and tisk; ng Control Rectioning are id
mbination of thant in time – ng Undefined gned.
es identified b
ritisation ential hazards/votes” to alloc
perational Riskn losses againsise as a resultf the total numnst the variou
is more pronouncelly acknowledged th
ence Risk Asse
es requires thtance of the pand without cermining the cccurring. The r
L
determinatiosal pathway –trols in place tmitigating con
onsequences oere appropria
utcome is relat
kelihood of theols for a negat
obability of thel of risk of an
ider any unced to reach thefrom guidancehe causal pat
the matter sho
lated – wheredentified. In the probabilitywhich is rarel– where a cau
by the team ar
/issues were icate to what tk Mentoring’s st the numbert of 10% of thember of pointus individual p
d than that determhat the items given
essment
Ver 2,
e stakeholderpotential contontrols in plac
consequencesresult is a “lev
Level of Risk =
on are as follow– the balance bto prevent the
ntrol strategie
of the outcomate, the causated to harmin
e outcome beive consequenhe event occuoutcome by c
ertainties in the risk scores se including: hway cannot ould be referr
e an issue suchthis case it is iy of the controy assessable iusal pathway
re shown in Ta
identified throthey considerreview of fat
r identified in e issues (root ts raised werepoints.
ined by Vilfredo Papriority in the proc
01/04/2015
rs to determintrol. Risk is thce. s or impact of vel of risk” def
= Consequenc
ws: between the iem from becos and tactics t
me reached byl pathway con
ng people, nat
eing reached –nce or positivrring and the
combining the
he estimates, vhown in Table
be clearly desred as an actio
h as failing to mpossible to ol failing AND n a team envihas no clear o
able 4.
ough a “votinged to be the kality and incidpredictive ancauses etc.)1.
e then issued t
reto in 1906 - and tcess plausibly repre
ne the risk thae product of t
a potential evfined by the f
ce x Likelihood
intensity and oming incidenthat act to mi
y the causal pansidered shoutural environm
– giving balance opportunityoverall expos
e consequenc
validate thesee 6. Note tha
scribed – any on to the Clien
follow a procgenerate a mthe causal pa
ironment; andoutcome, and
g” system whkey hazards/isdent data, comnalyses, a divis. to the team m
the taxonomy of thisented the vast maj
at the identifiethe conseque
vent occurringollowing.
d
frequency of nts; nimise negati
athway – withuld identify thement, propert
ce to the causy occurring. Lsure to the eve and likeliho
e where approt in some inst
estimation ofnt to more cle
edure or a deeaningful risk
athway being d
d so no meanin
ereby team mssues. mparing the nsion of 90:10 i
members as “v
is difference has nojority of the potent
ed threat posence and the li
g in combinat
the cause(s) a
ve outcomes
h a negative ime dimension uy, process con
se, preventatiikelihood is deent;
ood rankings u
opriate. tances the risk
f risk levels woearly determin
etection systemk score , as it r“traversed” a
ngful risk scor
members were
umber of roois indicated. T
votes” which t
ot been researched tial risk/reward in th
Pg 19
es to the ikelihood of
ion with the
and the
from an
mpact or an upon which is ntinuity,
ve and efined as the
using the risk
k levels were
ould be ne the level
m not requires the t the same
re can be
e assigned a
t causes That is 90% of
they could
at this stage. The he subject area.
WLWambo Coal Longwalls 8 to
ORMJ1408
The results oincluded. Thiof risk is sum
Ref
IS112 Popr
IS121 Enar
IS078 Fagr
IS116 Po
IS120 Pore
IS002 EnStim
IS009 Rere8
IS014 Relopa
IS022 (Tdu10
IS039/ IS093
Su10
IS083 Erim
IS099 Fa
IS118 Po
IS024 A re
IS026 Mve
IS048/ IS096
StU
IS061 M
IS068 Infrw
IS076 Fahide
IS110 W
o 10A Subside
of this output is provided a
mmarised in th
otential subsidroperties.
nvironmental/rea with Stony
ailure of the mroundwater sy
otential for ch
otential for LWepairs to Wam
nvironmental tony Creek (in
mpacts associa
educed base fesulting from ato 10A (predo
educed grounowering of thearticularly con
Temporary) Loue to fracturin0A.
ubsidence imp0A (in particul
rosion and geompacts.
ailure to gain
otential fractu
change in flooesulting from t
Mine subsidencegetation of S
tructural damnited Mine ga
Mine subsidenc
nteraction of Wactured zone
working and po
ailure of tiministoric Homeselays in produ
Wambo South
ence Risk Asse
are shown in method for th
he Risk Treatm
dence effects
/subsidence imy Creek and th
monitoring proystem.
hanges in align
W 10A to reacmbo Creek ove
consequencencluding changated with the
flow to Wamba lowering of ominantly LW
ndwater user ae water table ansidering the n
oss of capacityng to the wate
pacts to WCPLlar the Wamb
omorphologic
approval of th
uring in sandst
od regimes orthe extraction
ce impacts duStony Creek re
age to wells aas bores).
ce impacts on
Wambo Seamresulting in in
otentially into
ng or effectivetead working
uction while th
Water Dam –
essment
Ver 2,
Table 4, ordehe team to ide
ment Plan in A
Table
Process/Issu
on the right-o
mpacts on Wahe potential fo
ogram to dete
nment of Wam
ctivate subsideer Whybrow w
es associated wges to channeextraction of
bo Creek (alsothe water tab
W 10A).
access to hardassociated witnear neighbou
y of water stoer storage floo
L powerlines rbo South Wate
cal impacts on
he Extraction
tone outcrops
r extent of pon of LWs 8 to
ue to the extraesulting in env
and bores clos
n items of kno
fractured zonncreased wate the Wambo s
eness of Homes in the Whybhe project is c
– potential imp
01/04/2015
red by descenentify and sor
Appendix 1.
e 4: Priority I
ue/Activity
of-way (road)
ambo Creek (ior erosion).
ect and respon
mbo and Ston
ence cracking workings pane
with water floel stability) res
LWs 8 to 10A
o known as Soble associated
d rock groundth the extractur effects.
rage in the Wors resulting f
resulting fromer Dam power
n North Wamb
Plan resulting
s adjacent to
tential inunda10A.
action of LWs vironmental co
se to the mine
wn Aborigina
ne with overlyer make in theseam undergr
estead backfilbrow Seam). Rcompleted.
pact on the in
nding vote fret initial conce
Issues
in favour of s
in particular t
nd to an impa
y Creeks abov
which requireel 9 and 9A.
ow and qualitysulting from su
A.
uth Wambo Cd with the extr
water supply tion of LWs 8 t
Wambo South Wfrom extractio
m the extractiorlines).
bo Creek abov
g in productio
Wollombi Bro
ation due to s
8 to 10A on ronsequences.
e footprint (in
l heritage.
ying Whybrowe overlying Wround working
l project (grouRanked on the
tegrity of the
equency with terns at an earl
several private
he confluence
act on the
ve LW 10A.
ed historic
y changes in ubsidence
Creek)raction of LWs
due to a to 10A -
Water Dam on of LWs 8 to
on of LWs 8 to
ve predicted
n delays.
ook.
ubsidence
iparian .
cluding old
w Seam hybrow gs.
uting of e basis of
dam wall.
the nominatey stage. The r
Votes
e 5 C
e 5 S
4 G
4 S
4 S
2 S
s 2 S
2 G
o 2 S
o 2 B
2 S
2 B
2 L
1 S
1 F
1 In
1 H
1 G
1 B
1 In
Pg 20
d aspect arearesulting level
Aspect Type
Community
Surface Water
Groundwater
Surface Water
Surface Water
Surface Water
Surface Water
Groundwater
Surface Water
Business
Surface Water
Business
Land/Heritage
Surface Water
Flora/Fauna
nfrastructure
Heritage
Groundwater
Business
nfrastructure
a
r
r
r
r
r
r
r
e
r
WLWambo Coal Longwalls 8 to
ORMJ1408
Ref
IS117 Poch
IS119 Poef
7.2 RefeIssues raisedwere consideregulatory apNo specific, aidentified du
Maintain offs
Install monitWambo Cree
Implement tLWs 7 and 8.
Re-compact
Prediction ofSeam workin
Mine Subsideand impact o
Continuous iother agreem
Dam Safety Cextraction wWambo SoutTailings Dam
o 10A Subside
otential for inhanges in dow
otential for imffects from de
erred Issues during the ris
ered to be ‘repproval issuesadditional, ref
uring previous
Description
set from Woll
oring bore in ek over LW8.
rigger levels in.
or infill surfac
f height of frangs.
ence Board inon surface fea
mplementatioments with ne
Committee apithin the Notith Water Dam
m.
ence Risk Asse
creased erosiwnstream wat
mpacts on grouewatering in th
sk assessmenferred issues’s. ferred issues w risk assessme
n of Issue
lombi Brook.
the alluvium
n bores surro
ce cracking of
cturing above
nterest in ownatures and stru
on of compeneighbours.
pproval requirfication Area
m and North-E
essment
Ver 2,
Process/Issu
on in Wamboer quality.
undwater usehe Whybrow
t workshop b. Referred iss
were generateent workshop
Table
O
of North O
unding O
soil. O
e Wambo Oa
nership uctures.
Oi
nsation or O
red for of the ast
Oi
01/04/2015
ue/Activity
o and Stony Cr
ers or baseflowSeam.
rainstorming sues identified
ed during conps are shown i
5: Referred
Outside the sc
Outside the sc
Outside the sc
Outside the sc
Outside the scassessment is
Outside the scissue).
Outside the sc
Outside the scissue).
reeks resulting
w as a result o
that were outd were either
nsiderations on Table 5.
Issues
Just
cope of the ris
cope of the ris
cope of the ris
cope of the ris
cope of the risssue).
cope of the ris
cope of the ris
cope of the ris
g in potential
of drawdown
tside the scopcontrol, techn
f Longwalls 8
tification
sk assessment
sk assessment
sk assessment
sk assessment
sk assessment
sk assessment
sk assessment
sk assessment
Votes
1 S
1 G
pe of the risk anical assessm
to 10A. Refer
t (control rela
t (control rela
t (control rela
t (control rela
t (technical
t (regulatory
t (control rela
t (regulatory
Pg 21
Aspect Type
Surface Water
Groundwater
assessment ent or
rred issues
ated).
ated).
ated).
ated).
ated).
r
WLWambo Coal Longwalls 8 to
ORMJ1408
8 ASSES
8.1 Risk The ‘tolerabibeing propergood practicwith “As Low
The purposelevel of risk wproposed to The ALARP pacceptabilitythe level of eon the right zone if the co
8.2 Risk The risk rankoutlined in thaccount cum
9 TREAT
A systems ap1. Area2. Whe3. Sequ
Additional inSelection of cregard to theoperator traior additions
Further, the qualitatively in the contro
o 10A Subside
S RISK
Acceptabiliility’ of a risk irly controlled e is targeted t
w as Reasonab
of risk criteriwhich is accepcontrol the ri
principle, as rey of risk and toexposure to a hand side of tost of removin
Ranking king likelihoodhe Appendice
mulative impac
T RISKS
pproach to theas of interveneel of Safe Prouence of Barr
nformation is pcontrols to reeir prospectiveining efforts. Amade where t
prospective rreviewed by
ol and the abil
ence Risk Asse
ity and Riskis the willingn(HB 203:2006to reduce riskbly Achievable
a is to allow tptable or tolersk during the
epresented in o demonstraterisk. More oft
the diagram png the risk is d
d, consequences. The risk trects throughou
e treatment otion (Prevent
oduction (Neriers (Hierarchprovided in thduce the likele reliability. TAs part of thethese existing
eliability of thconsidering thity to mitigate
Intolerable Region
The ALARP Region
Broadly Acceptab(No need for detaworking to demonALARP)
essment
Ver 2,
k Criteria ess to live wit
6 – Environmek to “As Low ase” (ALARA).
he organisatiorable. In esserisk assessmethe diagram be that an orgaten this is donresented in F
disproportion
Figure 4
ces and risk meatment plan
ut all loss scen
of risks involveion, Monitori
rtney Wheel); hy of Controls)he Appendicesihood of the r
That is, installe process, exisg controls are
he controls ideheir position oe this deterior
A level o
Tolerable onlycost is gross
Toleraexc
able Region tailed onstrate
01/04/2015
th a risk to secental Risk Mans Reasonably
on to clearly dnce the risk c
ent – leading tbelow, was deanisation has dne qualitativeligure 4. A riskate to the ben
4: Risk Crite
matrix considerin Appendix 1arios.
es considerating, Mitigationand
). s. risks associateing engineerin
sting controls deemed unac
entified as issuon the hierarcration.
l of risk that cannot bgrounds.
nly if risk reduction isssly disproportionate
gained.
rable if cost of risk rexceed the improvem
Negligible Ri
cure benefits,nagement – PPracticable” (
define unacceriterion enablto the developeveloped to asdone all that ily rather thank may be consnefits gained.
ria "ALARP"
red by the tea1 shows the ri
on of three asn, Response/R
ed with the tong modificatioare assessed cceptable or i
ues were alsochy of controls
t be justified on any
is impracticable or ifate to the improveme
reduction would ment gained.
Risk
, on the underPrinciples and (ALARP). ALAR
ptable levels les the organipment of the ssist in the deis considered as a quantitasidered to be
am during theisk ranking res
spects: Recovery);
opic under revons is a superiand recommenadequate.
o reviewed. Ths, the ability t
r if its ent
1 x 10-3
1 x 10-5
rstanding thatProcess). LegRP is often int
of risk, or consation to priorisk treatmen
efinition of theto be practica
ative probabilitolerable in th
e ranking procsults. The tea
view were maior control to endations for
hese controls to detect any
Pg 22
t the risk is islation and
terchanged
nversely the oritise actions nt plan. e al in reducing ity as shown he ALARP
ess are ms took into
de with due relying on amendments
were deterioration
WLWambo Coal Longwalls 8 to
ORMJ1408
9.1 Risk The risk treat
10 MONI
10.1 NomThe nominatencourage aissues – comThe nominat
1. Revi2. Prov
from3. Mon
10.2 ImplIt is importanwas that:
1. Appfor c
2. Assu3. Acti
WCPL can mframework. Wunderlying h
10.3 ComCommunicatto confirm ththroughout t
10.4 ConcA significant rigour. The dbusiness by eThis outcomeOngoing revimanagemenDr Peter Stansession and r
o 10A Subside
Treatment tment plan in
TOR AND R
minated Cooted coordinatoll parties whomenting as ne
ted coordinatoiew the reporvide feedbackm team expectnitor the com
lementationnt to confirm
propriate perscompletion; umptions are ion items wouake modificatWhere a chanazard remain
municationtion and consuhat this reportthe life cycle o
cluding Remgoal of the ris
desired outcoevaluating thee was achieveiew will be net activities arendish would liresources pro
ence Risk Asse
Plan Appendix 1 s
EVIEW
ordinator or is the WCP attended theeeded. or should alsort to confirm tk to the partietations/recompletion of the
n Review Plthe controls a
sonnel would
validated; anuld be approptions to the renge is requireds tolerable is
n and Consuultation form t is shared witof the study su
marks sk assessmentme was to pre
e causal pathwed by followineeded to manae conducted aike to thank a
ovided – and o
essment
Ver 2,
shows the risk
L Environmene risk assessm
o: the accuracy os who attende
mmendationse additional ac
lan and actions id
be allocated
d riately resour
ecommended d, the basis forequired.
ultation an integral pa
th all participaubject area.
t process wasevent losses tways and deveg the risk asseage the additias required. ll personnel –
other team me
01/04/2015
k evaluation re
nt and Commuent team sess
of the materiaed the risk assraised on the
ctions to confi
entified are a
for implemen
rced and impleactions, but t
or the change
art of the risk ants involved
to identify anto people, equeloping recomessment proconal controls
– particularly Jembers who c
esults.
unity Managesion to review
al recorded frsessment on a day; and irm there is cl
ppropriately m
ntation of rec
emented. these should band a desktop
managementin the process
nd analyse theuipment, the e
mmended coness describedidentified, an
oanna Webstcontributed to
r (Troy Favell)w this report a
om the team any decisions
ose out of eac
managed. Th
commended a
be done in lighp review to as
t process. It iss and other st
e subsidence environment trols for inclu within this do
nd to ensure t
ter and Troy Fo the risk asse
). The coordinnd the identif
session; which may be
ch action.
e expectation
actions in a ti
ht of the risk mssess if the ris
s the Client’s rtakeholders as
related hazardand consequesion into an aocument. hat subseque
Favell who arressment.
Pg 23
nator should fied hazards/
e different
n of the team
mely manner
management k of the
responsibility s appropriate
ds with ential action plan.
ent risk
anged the
r
WLWambo Coal Longwalls 8 to
ORMJ1408
11 REFER
Department Rev 3. Department Guideline. Safe Product Safe Product Wambo Coal Wambo Coal Wambo CoalManagemen Wambo Coal Wambo Coal Wambo CoalAssessment.
o 10A Subside
RENCES
of Mineral Re
of Mineral Re
tion Solutions
tion Solutions
l Pty Limited (
l Pty Limited (
l Pty Limited (nt Plan.
l Pty Limited (
l Pty Limited (
l Pty Limited (
ence Risk Asse
esources (200
esources (201
(2012) North
(2013) North
(2003) Wamb
(2005) Wamb
(2006) Wamb
(2012) North W
(2013) North W
(2014) North W
essment
Ver 2,
3) EDG17 – G
1) MDG1010
Wambo Und
Wambo Und
o Developmen
o Seam Under
o Developmen
Wambo Unde
Wambo Unde
Wambo Unde
01/04/2015
uideline for Ap
– Minerals Ind
derground Min
derground Min
nt Project Env
rground Mine
nt Project – N
erground Mine
erground Mine
erground Mine
pplication for
dustry Safety
ne – Longwalls
ne – Longwalls
vironmental Im
e Modification
North Wambo
e Modification
e Extraction Pl
e Longwall 10A
r Subsidence M
and Health Ri
s 7 and 8 Subs
s 7 to 10 Subs
mpact Statem
n Statement of
Underground
n Environmen
lan for Longw
A Modificatio
Management A
isk Managem
sidence Risk A
sidence Risk As
ent.
f Environmen
d Mine Subside
tal Assessmen
walls 7 and 8.
on Environmen
Pg 24
Approvals.
ent
Assessment.
ssessment.
tal Effects.
ence
nt.
ntal
WLWambo Coal Longwalls 8 to
ORMJ1408
12 APPEN
o 10A Subside
NDICES
ence Risk Asseessment
Ver 2, 01/04/2015 Pg 25
Wambo Coal Longwalls 8 to
ORMJ1408
12.1 Risk The followinimpacts assowhere appro The table is
Ref
1. Natur
IS001
o 10A Subsidence R
k Treatment Plan
ng risk treatment plociated with Longwopriate.
ordered by Aspect
Process/Issue
ral Features
Environmental conseassociated with watequality changes in NoCreek (including chanstability) resulting froimpacts associated wextraction of LWs 8 t
Risk Assessment
Ver
n
lan was developed wall 10A were includ
group and Priority
e/Activity V
equences er flow and orth Wambo nges to channel om subsidence
with the to 10A.
r 2, 01/04/2015
during the third teaded at the end of th
.
Votes Aspect Type
- Surface Wate
am session, buildinhe table to easily as
Table
e Pl
er
Grouting of histothe Whybrow Semanagement methe Water Manaincluding the SurProgram (SWMPProgram (GWMPResponse Plan (SCreek Subsidenc[NWCSRS] [part LW10A Review: Crisk ranking chanStill ALARP.
g on updated inforssess the change (i.
6: Risk Treatmen
lanned Controls
oric Homestead workeam. Monitoring and easures in accordancegement Plan (WMP) rface Water Monitori
P), Groundwater MonP), Surface and GrounSGWRP) and North Wce Response Strategy of the SGWRP]).
Consequence increasenged from D 4 21 to D
Pg 26
mation and risk rane. adding Longwall
nt Plan
Cat
ings in
e with - ng itoring
ndwater Wambo
ed, thus D 3 17.
Env
nkings developed d10A). Changes mad
L C R
D 3 17
uring previous teamde by the third team
Actions
-
m sessions. Specificm are italicised with
By Whom/By
-
c aspects and h comments
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS002
IS003
IS004
IS005
o 10A Subsidence R
Process/Issue
Environmental conseassociated with watequality changes in St(including changes tostability) resulting froimpacts associated wextraction of LWs 8 t
Environmental conseassociated with watequality changes in W(including changes tostability) resulting froimpacts associated wextraction of LWs 8 t
Induced leakage fromresulting from a lowewater table associateextraction of LWs 8 t
Induced leakage fromBrook resulting fromthe water table assocextraction of LWs 8 t(predominantly for L
Risk Assessment
Ver
e/Activity V
equences er flow and ony Creek
o channel om subsidence
with the to 10A.
equences er flow and
Wollombi Brook o channel om subsidence
with the to 10A.
m Stony Creek ering of the ed with the to 10A.
m Wollombi a lowering of ciated with the to 10A W10A).
r 2, 01/04/2015
Votes Aspect Type
2 Surface Wate
- Surface Wate
- Surface Wate
- Surface Wate
e Pl
er
Monitoring and accordance withSWMP, GWMP a(Longwalls 1 to 5significant impac LW10A Review: Bobservations conrisk ranking chan
er
Monitoring and accordance withSWMP, GWMP aagainst the perfofor Wollombi Broand implementamitigation measu LW10A Review: Crisk ranking chan
er
Monitoring and accordance withSWMP, GWMP a LW10A Review: R21 to E 4 23.
er
Monitoring and accordance withSWMP, GWMP aagainst the perfofor Wollombi Broand implementameasures. (Rankdemonstrated peLW10A Review: R21 to E 5 25.
lanned Controls
management measur the WMP (including
and SGWRP). Historic 5) observations of no ct.
Based on historical nsequence was reducenged from D 4 21 to D
management measur the WMP (including
and SGWRP). Assessmormance indicators deook as described in thtion of any required ures.
Consequence reducednged from E 4 23 to E
management measur the WMP (including
and SGWRP).
Risk ranking changed
management measur the WMP (including
and SGWRP). Assessmormance indicators deook as described in thtion of relevant mitig
ked according to the erformance of NW U/Risk ranking changed
Pg 27
Cat
res in the
ed, thus D 5 24.
Env
res in the
ment eveloped he WMP,
d, thus E 5 25.
Env
res in the
d from D 4
Env
res in the
ment eveloped he WMP, gation
/G). d from D 4
Env
L C R
D 5 24
E 5 25
E 4 23
E 5 25
Actions
-
-
-
-
By Whom/By
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS006
IS007
IS009
IS010
o 10A Subsidence R
Process/Issue
Reduced base flow toCreek upstream of LWresulting from a lowewater table associateextraction of LWs 8 t(predominantly LW8
Induced leakage fromCreek over LW 8 duethe water table and/cracking.
Reduced base flow to(also known as Southresulting from a lowewater table associateextraction of LWs 8 t(predominantly LW1
Impacts to groundwaand/or a change in thcategory of alluvial gto a change in grounand/or quality associsubsidence due to thLWs 8 to 10A - particconsidering the near
Risk Assessment
Ver
e/Activity V
o North Wambo Ws 7 and 8 ering of the ed with the to 10A
and 9).
m North Wambo e to a lowering of /or connective
o Wambo Creek h Wambo Creek) ering of the ed with the to 10A 0A).
ater users he beneficial use roundwater due dwater level iated with
he extraction of cularly neighbour.
r 2, 01/04/2015
Votes Aspect Type
- Surface Wate
- Surface Wate
2 Surface Wate
- Groundwate
e Pl
er
Monitoring and pillar) in accordathe SWMP, GWM LW10A Review: R21 to C 5 22. Still
er
Grouting of histoLW7 and 8) in thGrouting Optionmanagement methe WMP (includSGWRP and NWC LW10A Review: R21 to D 5 24.
er Monitoring and accordance withSWMP, GWMP a
er
Monitoring and accordance withSWMP, GWMP, SMaintenance of with potentially (i.e. neighbourin
lanned Controls
management measurance with the WMP (iMP, SGWRP and NWC
Risk ranking changedl ALARP.
oric Homestead worke Whybrow Seam as s Paper. Monitoring aeasures in accordanceding the SWMP, GWMCSRS).
Risk ranking changed
management measur the WMP (including
and SGWRP).
management measur the WMP (including SGWRP and NWCSRSexisting water agreemaffected groundwateg private landholders
Pg 28
Cat
res (LW8 ncluding
CSRS).
d from D 4
Env
ings (for per the
and e with
MP,
d from D 4
Env
res in the Env
res in the ). ments
er users s).
Env
L C R
C 5 22
D 5 24
D 4 21
D 4 21
Rr1sbL
Actions
-
-
-
Review monitoring borequirements for LW 10A - particularly to thsouth near the boundary of the MiniLease.
By Whom/By
-
-
-
ore
he
ng
WCPL EnvironmCommunity Ma(31/1/2015)
y When
ment and anager
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS011
IS014
IS016
IS018
o 10A Subsidence R
Process/Issue
Impacts to groundwaand/or a change in thcategory of the hard groundwater due to groundwater level anassociated with substhe extraction of LWsparticularly considerneighbour effects.
Reduced groundwatehard rock groundwata lowering of the watassociated with the eLWs 8 to 10A - particconsidering the near effects.
A change in land surfpreferential pathwayinfiltration resulting fto the land surface caextraction of LWs 8 t
Improved shallow groquality in the fracturLWs 8 to 10A where occurs to land surfacimpact (so not risk ra
Risk Assessment
Ver
e/Activity V
ater users he beneficial use rock a change in
nd/or quality idence due to s 8 to 10A - ing the near
er user access to ter supply due to ter table extraction of cularly neighbour
face slope and ys for rainfall from fracturing aused by the to 10A.
oundwater ed zone above fracturing
ce - a beneficial anked).
r 2, 01/04/2015
Votes Aspect Type
- Groundwate
2 Groundwate
- Groundwate
- Groundwate
e Pl
er
Monitoring and accordance withSWMP, GWMP aexisting water agaffected groundwprivate landhold
er
Monitoring and accordance withSWMP, GWMP aexisting water agaffected groundwprivate landhold LW10A Review: Iprovisions and usranking changed
er
Monitoring in acMonitoring ProgPlan (LMP). Manimpacts to land ithe LMP (e.g. rehtroughs).
er
Monitoring and accordance withmonitoring of wawith the GWMP)beneficial aspectapplied.
lanned Controls
management measur the WMP (including
and SGWRP). Maintengreements with potenwater users (i.e. neighers).
management measur the WMP (including
and SGWRP). Maintengreements with potenwater users (i.e. neighers).
In consideration of mse of groundwater so
d from D 4 21 to D 5 2
ccordance with the Sugram and Land Managnagement and mitigatin general in accordanhabilitation of subside
management measur the WMP (including ater quality in accord). Believed that this ist so no risk ranking w
Pg 29
Cat
res in the
nance of ntially hbouring
Env
res in the
nance of ntially hbouring
ake good ource, risk 24.
Env
ubsidence gement tion of nce with ence
Env
res in
ance s a as
-
L C R
D 4 21
D 5 24
C 5 22
- - -
Actions
-
-
-
-
By Whom/By
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS019
IS021
IS022
IS023
o 10A Subsidence R
Process/Issue
Improved shallow hagroundwater quality alluvium resulting froinduced loss of watealluvium - a beneficiarisk ranked).
Potential subsidencenatural dams and powith the extraction o(excluding Wambo SoDam).
(Temporary) Loss of water storage in the Water Dam due to frwater storage floors extraction of LWs 8 t
Far-field subsidence resulting in rock instaWollemi National Pa
Risk Assessment
Ver
e/Activity V
ard rock beneath the
om mining r from the al impact (so not
e impacts on nds associated
of LWs 8 to 10A outh Water
capacity of Wambo South
racturing to the resulting from
to 10A.
impacts ability of the rk Escarpment
r 2, 01/04/2015
Votes Aspect Type
- Groundwate
- Surface Wate
2 Surface Wate
- Flora/Fauna
e Pl
er
Monitoring and accordance withmonitoring of wawith the GWMP)beneficial aspectapplied.
er
Monitoring in acMonitoring Progand mitigation oaccordance withsurface cracks). Dby removal of wamining. LW10A Review: R21 to C 4 18 - stil
er
Monitoring in acMonitoring ProgManagement Plamitigation of impwater storage daLMP and BFMP r LW10A Review: R21 to B 5 19 - stil
a
Monitoring and with the BiodiveLWs 7 and 8 (BMagainst performathe Wollemi Natimplementation measures.
lanned Controls
management measur the WMP (including ater quality in accord). Believed that this ist so no risk ranking w
ccordance with the Sugram and LMP. Manag
f impacts to land in g the LMP (e.g. remedDams/ground tanks mater and rehabilitatio
Risk ranking changedll ALARP.
ccordance with the Sugram, LMP and Built Fan (BFMP). Managempacts to land in generams in accordance wirespectively.
Risk ranking changedll ALARP.
management in accorsity Management Pla
MP) including assessmance indicators develtional Park and of relevant mitigatio
Pg 30
Cat
res in
ance s a as
-
ubsidence gement general in diation of managed on post
d from D 4
Env
ubsidence eatures
ment and ral and th the
d from D 4
Bus
rdance an for ent oped for
n
Env
L C R
- - -
C 4 18
B 5 19
E 5 25
Actions
-
-
-
-
By Whom/By
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS024
IS025
IS026
IS027
o 10A Subsidence R
Process/Issue
A change in flood regof potential inundatisubsidence resulting extraction of LWs 8 t
Mine subsidence impextraction of LWs 8 triparian vegetation oCreek resulting in enconsequences.
Mine subsidence impextraction of LWs 8 triparian vegetation oresulting in environmconsequences.
Mine subsidence impextraction of LWs 8 triparian vegetation oBrook resulting in enconsequences.
Risk Assessment
Ver
e/Activity V
gimes or extent on due to from the
to 10A.
pacts due to the to 10A on of North Wambo vironmental
pacts due to the to 10A on of Stony Creek mental
pacts due to the to 10A on of Wollombi vironmental
r 2, 01/04/2015
Votes Aspect Type
1 Surface Wate
- Flora/Fauna
1 Flora/Fauna
- Flora/Fauna
e Pl
er
Monitoring in acMonitoring Progand mitigation oaccordance withof subsidence trodeveloped in conimpacts observeto 5 (e.g. limitedsmall losses of wmaterial). LW10A Review: R21 to D 3 17 - sti
a Monitoring and accordance with
a Monitoring and accordance with
a
Monitoring and accordance withAssessment agaiindicators develodescribed in the relevant mitigati
lanned Controls
ccordance with the Sugram and LMP. Manag
f impacts to land in g the LMP (e.g. rehabioughs). The controls wnsideration of the limd during extraction o ponding over LWs 1
water observed in allu
Risk ranking changedll ALARP.
management measur the BMP and WMP.
management measur the BMP and WMP.
management measur the BMP and WMP. nst the performance
oped for Wollombi BrWMP, and implemen
ion measures.
Pg 31
Cat
ubsidence gement general in
litation were
mited of LWs 1
to 5 and vial
d from D 4
Env
res in Env
res in Env
res in
rook as ntation of
Env
L C R
D 3 17
D 5 24
D 5 24
D 5 24
Actions
-
-
-
-
By Whom/By
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS028
IS032
IS078
IS083
o 10A Subsidence R
Process/Issue
Subsidence impacts adisturbance due to thLWs 8 to 10A resultinhabitat for threatene(including consideratPendula).
Subsidence impacts adisturbance due to e8 to 10A resulting in of native vegetation.
Failure of the monitodetect and respond tthe groundwater sys
Erosion and geomorpimpacts on North Waabove predicted imp
Risk Assessment
Ver
e/Activity V
and surface he extraction of ng in loss of ed species tion of Acadia
and surface xtraction of LWs long-term loss
oring program to to an impact on tem.
phological ambo Creek acts.
r 2, 01/04/2015
Votes Aspect Type
- Flora/Fauna
- Flora/Fauna
4 Groundwate
2 Surface Wate
e Pl
a
Monitoring and accordance withSubsidence MonManagement anland in general in(e.g. remediation LW10A Review: Bpresence of AcacLongwall 10A, ris24 to C 4 18 - stil
a
Monitoring and with the BMP anto land in genera LW10A Review: R24 to E 5 25.
er
Documentation a(including the SWNWCSRS). Assessdevelopment of Development of readily monitoreand responsibilit
er
Grouting of histothe Whybrow SePaper. Monitorinin accordance wSWMP, GWMP, S LW10A Review: R21 to B 5 19 - stil
lanned Controls
management measur the BMP, LMP and
nitoring Program. d mitigation of impac
n accordance with then of surface cracks).
Based on the potentiacia Pendula above sk ranking changed frll ALARP.
management in accond LMP. Mitigation of al in accordance with
Risk ranking changed
and execution of the WMP, GWMP, SGWRPsment of impacts durthe Extraction Plan. realistic triggers that
ed. Clear allocation ofties in the manageme
oric Homestead workeam as per Grouting Ong and management ith the WMP (includinSGWRP and NWCSRS
Risk ranking changedll ALARP.
Pg 32
Cat
res in
cts to e LMP
al
rom D 5
Env
rdance impacts the LMP.
d from D 5
Env
WMP P and ring
t can be f roles ent plans.
Env
ings in Options measures ng the ).
d from D 4
Env
L C R
C 4 18
E 5 25
D 4 21 Rp
B 5 19
Actions
-
-
Review additional piezometer holes.
-
By Whom/By
-
-
WCPL EnvironmCommunity Ma(31/1/2015)
-
y When
ment and anager
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS114
2. Public
IS067 IS092
3. Public
-
4. Farm
IS043 IS085
o 10A Subsidence R
Process/Issue
Pillar left in LW8 undWambo Creek – leadin subsidence profilechanges in ponding losurface.
c Utilities
Subsidence impacts tAusgrid powerline loLW 8 to 10A Applicatresulting from the ex8 to 10A.
c Amenities
No public amenities wthat could be potentby subsidence from tLWs 8 to 10A.
and Land Facilities
Subsidence impacts rinjury to livestock duextraction of LWs 8 t
Risk Assessment
Ver
e/Activity V
der the North ding to a change
which leads to ocations on the
to the 11 kV cated within the tion Area xtraction of LWs
were identified ially impacted the extraction of
resulting in ue to the to 10A.
r 2, 01/04/2015
Votes Aspect Type
- Land
- Infrastructur
- -
- Land
e Pl
Subsidence monBank Stability MMonitoring and with the WMP (iSGWRP and NWCponding areas - t LW10A Review: Bactions identifiedworkshop, risk raD 4 21.
re
Monitoring and accordance within consultation w Note: Powerline
Monitoring and accordance withnotification of agmining and activof agistment gracracking presentand/or livestock LW10A Review: R21 to D 5 24.
lanned Controls
itoring program. Bedonitoring Program. management in acconcluding the SWMP, CSRS).Note: There arethe location may chan
Based on completion d in the previous teamanking changed from
management measur the AABFMP to be p
with Ausgrid.
decommissioned.
-
management measur the LMP, including:
gistees of areas of lonve subsidence; and exzing from areas wher
ts a reasonable risk to.
Risk ranking changed
Pg 33
Cat
and
rdance GWMP, e existing nge.
of m
B 5 19 to
Env
res in repared
-
-
res in
ngwall xclusion re surface o people
d from D 4
Bus
L C R
D 4 21
- - -
- - -
D 5 24
Actions
-
-
-
-
By Whom/By
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS044
IS045
IS046
IS079
IS112
o 10A Subsidence R
Process/Issue
Mine subsidence implong-term loss of agrproductivity due to tLWs 8 to 10A.
Mine subsidence impon WCPL owned landextraction of LWs 8 t
Mine subsidence imploss of storage in farmother earthen water
Potential impacts onproperties and activibased on reputationaarising from a compl
Potential subsidenceright-of-way (road) inseveral private prope
Risk Assessment
Ver
e/Activity V
pacts resulting in ricultural he extraction of
pacts to fences d resulting from to 10A.
pacts resulting in m dams (and storages).
neighbouring ties. Ranked al damage ainant.
e effects on the n favour of erties.
r 2, 01/04/2015
Votes Aspect Type
- Land
- Business
- Business
- Community
5 Community
e Pl
Monitoring in acMonitoring Progand mitigation maccordance with
Monitoring and accordance withsubsidence impacompletion of ac
Monitoring and accordance with
y
Community liaisonotification of anoperations at CoCommittee meet LW10A Review: R15 to E 5 25.
y
Right-of-Way Manotification of laway is subject tofor entering activSubsidence monvisual). Repairs a LW10A Review: Band the measureof an incident of to be lower, thus5 19 to D 5 24.
lanned Controls
ccordance with the Sugram and LMP. Managmeasures for land in g
the LMP.
management measur the LMP. Remediatio
act on fences followinctive subsidence.
management measur the LMP.
on processes - with ny commencement of
ommunity Consultativtings.
Risk ranking changed
anagement Plan inclundholder when the r
o active subsidence. Sve subsidence zone. itoring program (grou
as required.
Based on experience aes implemented, the lif this magnitude is cons risk ranking changed
Pg 34
Cat
ubsidence gement general in Bus
res in on of ng Bus
res in Bus
f mining ve
d from A 5
Rep
uding: ight-of-ignage
und and
at site ikelihood nsidered d from B
Env
L C R
E 5 25
D 4 21
D 4 21
E 5 25
D 5 24
Actions
-
-
-
-
-
By Whom/By
-
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
5. Indust
IS035
IS039 IS093
IS040
IS048 IS096
o 10A Subsidence R
Process/Issue
trial, Commercial and
Subsidence impacts tgravel access roads aresulting from the ex8 to 10A.
Subsidence impacts tpowerlines resulting extraction of LWs 8 tparticular the WambDam powerlines).
Subsidence impacts ttelecommunication l(overhead/undergrofrom the extraction o
Structural damage toclose to the mine fooold United Mine gas
Risk Assessment
Ver
e/Activity V
d Business Establishm
to unsealed and tracks xtraction of LWs
to WCPL from the
to 10A (in bo South Water
to WCPL ines und) resulting of LWs 8 to 10A.
o wells and bores otprint (including bores).
r 2, 01/04/2015
Votes Aspect Type
ments.
- Business
2 Business
- Business
1 Infrastructur
e Pl
Monitoring and measures in accoBFMP. LW10A Review: Band the measureof an incident of to be lower, thus4 18 to D 4 21.
Monitoring, manmeasures in accoBFMP (e.g. strucof power poles wprotection settin[which are a primreduce the impa LW10A Review: R18 to E 4 23.
Monitoring, manmeasures in accoBFMP (e.g. braciwith stays).
re
Known location oAssessment of wand, dependent and seal prior toEDG01 guidelinemonitoring and dbores are assessManagement PlaMine process.
lanned Controls
management and mitordance with the LMP
Based on experience aes implemented, the lif this magnitude is cons risk ranking changed
nagement and mitigatordance with the LMPtural review of cables
with stays, inspection ngs, and installation omary mitigating contrct)].
Risk ranking changed
nagement and mitigatordance with the LMPng of poles for overh
of all wells and boreswells/bores prior to ex
on conditions, decom extraction and sealin
es. Ability to re-install dewatering bores. Weed under NWU Inrushan and Inrush Author
Pg 35
Cat
tigation P and
at site ikelihood nsidered d from C
Bus
tion P and s, bracing regime,
of rollers rol to
d from C 4
Bus
tion P and ead lines Bus
. xtraction mmission ng as per
required ells and h ity to
Bus
L C R
D 4 21
E 4 23
D 4 21
D 4 21
Cwvbdu3
Actions
-
-
-
Confirm if there are awells or bores in the vicinity of LW 10A - wbore locations (and thdecommissioning) unknown by the team30/10/14.
By Whom/By
-
-
-
ny
with heir
m of
NWU TechnicServices Superintende(At time)
y When
cal
ent
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS054 IS082
IS055
IS056
IS057
o 10A Subsidence R
Process/Issue
Mine subsidence impslope instability of wemplacements (appli10).
Mine subsidence impdamage to rehabilita
Mine subsidence impmine dewatering pip
Mine subsidence improads resulting in disoperations.
Risk Assessment
Ver
e/Activity V
pacts resulting in aste rock ies to LW8 to
pacts resulting in ated areas.
pacts to WCPL peline.
pacts to haul sruption of
r 2, 01/04/2015
Votes Aspect Type
- Safety
- Flora/Fauna
- Business
- Business
e Pl
Monitoring and with the Slope StCommunication meetings and intunderground andon any access traaffected. Rankingexperience with limited impacts (exclusion zones)
a
Monitoring and with the Slope StLMP. Remediatioaccordance withManagement Pla LW10A Review: R24 to D 4 21 - sti
Monitoring and with the SubsideBFMP. Monitorinpipe lines. Continpump and pipelithe fixed points aslack in any affecdischarge pipelinnegligible water there will be no
Monitoring and with the Subsidethe BFMP. Signagbe affected. LW10A Review: Rextraction of LW
lanned Controls
management in accotability Management protocols with weeklteraction between d surface operations.acks/roads likely to bg based on operatingundermining dumps
(and implementation .
management in accotability Management on of subsidence imp the Rehabilitation
an.
Risk ranking changedll ALARP.
management in accoence Monitoring Progng and flow monitorsnuous (SCADA) monitne conditions. Monitoand provision of sufficted mine dewateringnes There will be no tin the South Wambopumping at the time
management in accoence Monitoring Progge on any haul roads
Risk no longer relevanW 7 is complete.
Pg 36
Cat
rdance Plan.
ly
. Signage e
g with of
Per
rdance Plan and acts in
d from D 5
Env
rdance ram and on all toring of oring of cient
g o Dam so anyway.
Bus
rdance ram and likely to
nt as
-
L C R
E 3 20
D 4 21
E 5 25 Rso
- - -
Actions
-
-
Review provision of slack for discharge another lines over LW 1
-
By Whom/By
-
-
d 0A.
NWU TechnicServices Superintende(31/1/2015)
-
y When
cal
ent
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS065
IS066 IS094
IS074
IS081
o 10A Subsidence R
Process/Issue
Wambo South Waterby subsidence resultiof dirty water, delay inrush to workings.
Other water manageinfrastructure (pipelipumps and dewateridamaged by subsideparticular the WambDam water pipelines
Exploration activitiessubsidence.
Instability of the highHomestead pit as a rsubsidence impacts.
Risk Assessment
Ver
e/Activity V
r Dam damaged ing in discharge to operations or
ement nes, roads, ng bores) nce (in
bo South Water over LW10A).
s affected by
hwall in the esult of
r 2, 01/04/2015
Votes Aspect Type
- Business
- Business
- Safety
- Safety
e Pl
Monitoring and with Prescribed the BFMP. CompSafety CommitteManagement Plawater levels wheproximate. Surfawith dam capacistorage for site o
Monitoring and with the SubsideBFMP.
Communication meetings and intunderground andGround disturbavery limited surfexpected hence and consequenc
Monitoring and with the Slope StProvision of 15 maround any affecbetween high wa(appropriately en LW10A Review: Rextraction of LW
lanned Controls
management in accoDam Management Pl
pliance with all necessee approvals. Inrush an involving reductionen subsidence effectsace Water Managemeties available for wat
operations.
management in accoence Monitoring Prog
protocols with weeklteraction between d exploration personnce protocols. There
face exploration workthe relatively low likee.
management in accotability Management
metre separation barrcted highwalls. Barrieall and longwalls ngineered).
Risk no longer relevanW 7 is complete.
Pg 37
Cat
rdance an under sary Dam
n of dam s are ent Plan er
Bus
rdance ram and Bus
ly
nel. will be
k elihood
Per
rdance Plan.
riers er pillar
nt as
-
L C R
D 4 21
D 4 21
E 4 23
- - -
Actions
-
-
-
-
By Whom/By
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS086
IS087
IS089
IS090 IS091
IS095
IS097
o 10A Subsidence R
Process/Issue
Subsidence impact oHomestead workshosubsided) resulting inincident.
Subsidence impact reof integrity of the poHomestead workings
Impact on steel-casebore holes to the Wh
Subsidence impacts oweather access road area resulting in inabcritical infrastructure
Subsidence impacts odrainage leading to fHomestead pit.
Subsidence impacts tservices lines over LWresulting in delays in
Risk Assessment
Ver
e/Activity V
n the old p (previously
n a safety
esulting in a loss ortal seals to the s.
d dewatering hybrow Seam.
on site all to southern
bility to access e.
on surface flooding in the
to active Ws 8 to 10A
production.
r 2, 01/04/2015
Votes Aspect Type
- Safety
- Safety
- Infrastructur
- Business
- Safety
- Business
e Pl
Monitoring and with the BFMP. LW10A Review: RHomestead Wor
Removal of wateprior to subsidinManagement. BaPaper. LW10A Review: Rextraction of LW
re Monitoring and with the BFMP.
Monitoring and with the BFMP, iinspections and
Inspection and mof the BFMP. Dedrainage systemdrainage paths in LW10A Review: Bconducted, risk rto D 4 21.
Monitoring and with the BFMP S
lanned Controls
management in acco
Risk no longer relevanrkshop removed.
er against the portal sg. Consideration of Inackfill as per Grouting
Risk no longer relevanW 7 is complete.
management in acco
management in acconcluding road signaginternal notification.
monitoring processes sign of the Homestea such that no changenside the Homestead
Based on additional sranking changed from
management in accoSite Services Plan.
Pg 38
Cat
rdance
nt as -
seals nrush g Options
nt as
-
rdance Per
rdance e, Bus
as part ad Pit s to the Pit shell.
studies m E 2 16
Per
rdance Bus
L C R
- - -
- - -
E 5 25
D 4 21
D 4 21
C 5 22
Actions
-
-
-
-
-
-
By Whom/By
-
-
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS110
6. Areas
IS060
IS061
IS064
o 10A Subsidence R
Process/Issue
Wambo South Waterpotential impact on tthe dam wall.
of Archaeological an
Greater than negligibheritage values of thHomestead Complex
Mine subsidence impknown Aboriginal he
Mine subsidence impunknown Aboriginal
Risk Assessment
Ver
e/Activity V
r Dam – the integrity of
nd/or Heritage Signifi
ble impact on e Wambo
x.
pacts on items of ritage.
pacts on items of heritage.
r 2, 01/04/2015
Votes Aspect Type
1 Infrastructur
icance
- Heritage
1 Heritage
- Heritage
e Pl
re
Dams Safety Commining within thdewatering progempty when minmonitoring progon the dam wall dam wall). Note: the dam isthe preventativethe loss of the daimpact on the op LW10A Review: Bconducted and aranking changed
Monitoring and monitoring outliHomestead Comapproved by the
Salvage ProgramConsent #2222 uNational Parks adiligence undertdisturbance perminspections). MoReasonable deptimpact mitigated
Archaeological sfor LWs 8 to 10Apart of surface dsite inspections)
lanned Controls
mmittee approval reqe notification area. St
gram (so dam effectivning underneath). Subram (includes survey and visual inspection
s a re-usable asset hoe controls are not effeam will not significanperation.
Based on further woradditional longwalls, rd from C 4 18 to A 4 10
management measurned in the Wambo
mplex Mine Managem Heritage Council.
mme approved as partunder section 90 of thnd Wildlife Act 1974. aken as part of surfacmits (including site onitoring of the scarreth of cover in this ared (reduced).
urveys previously undA. Due diligence unde
isturbance permits (i.
Pg 39
Cat
quired for taged ely bsidence points
ns of the
wever if ective, tly
rk risk 0.
Bus
res and
ent Plan Env
t of he
Due ce
ed tree. a so
Env
dertaken rtaken as ncluding Env
L C R
A 4 10
D 4 21
D 4 21
D 4 21
Actions
-
-
-
-
By Whom/By
-
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS069
IS070
IS071
o 10A Subsidence R
Process/Issue
Stud Master's CottagHomestead Complexby subsidence from L
Additional subsidencfailures over the Homworkings near the WHomestead Complex
Non-compliance withof the Heritage Counthe section 60 applic
Risk Assessment
Ver
e/Activity V
ge (Wambo x) compromised LW 7.
ce/pot hole mestead
Wambo x.
h requirements ncil approval of cation.
r 2, 01/04/2015
Votes Aspect Type
- Heritage
- Heritage
- Heritage
e Pl
Management meoutlined in the WMine ManagemeHeritage Councilstabilisation opticottage. Groutinroadways in the beneath cottagePaper. Ranking bconservative estslight structural in pillar loading). LW10A Review: Rextraction of LW
Management meoutlined in the WMine ManagemeHeritage CouncilHomestead roaddirectly beneaththe Grouting Opt LW10A Review: Cconsidered greatD 4 21 to D 3 17
Audit and reviewmeasures and mWambo HomestManagement Pla
lanned Controls
easures and monitoriWambo Homestead Cent Plan approved by, including review of ions and trenching arg of historic HomesteWhybrow Seam direc
e as per the Grouting Obased on predicted imimate of subsidence aimpact (less than 5% .
Risk no longer relevanW 7 is complete.
easures and monitoriWambo Homestead Cent Plan approved by. Grouting of historic
dways in the Whybrow Stud Master’s Cottagtions Paper.
Consequence of failurter, risk ranking chang- still ALARP.
w process of managemmonitoring outlined in
ead Complex Mine an.
Pg 40
Cat
ng omplex the
round the ead ctly Options
mpacts - and a increase
nt as
-
ng omplex the
w Seam ge as per
re ged from
Env
ment the Env
L C R
- - -
D 3 17
D 4 21
Actions
-
-
-
By Whom/By
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
7. Items
-
8. Perma
-
9. Reside
-
10. Othe
IS068
o 10A Subsidence R
Process/Issue
of Architectural Sign
Items of architecturawere determined to the risk identified in Archaeological and/oSignificance.
anent Survey Contro
No current survey cowere identified that potentially impactedfrom the extraction o
ential Establishments
No residential establidentified that could impacted by subsideextraction of LWs 8 t
er
Interaction of Wambfractured zone with oWhybrow Seam fractresulting in increasedthe overlying Whybropotentially into the Wunderground workin
Risk Assessment
Ver
e/Activity V
nificance.
al significance be covered by 6. Areas of
or Heritage
l Marks
ontrol marks could be by subsidence
of LWs 8 to 10A.
s
ishments were be potentially nce from the
to 10A.
bo Seam overlying tured zone d water make in ow working and
Wambo seam gs.
r 2, 01/04/2015
Votes Aspect Type
- -
- -
- -
1 Groundwate
e Pl
er
Dewatering of HWhybrow Seam Management meoutlined in the In
lanned Controls
-
-
-
omestead workings iprior to extraction. easures and monitorinrush Management P
Pg 41
Cat
-
-
-
n the
ng Plan.
Bus
L C R
- - -
- - -
- - -
D 4 21
CioLpbWw
Rcd
Actions
-
-
-
Confirm greater ntensity of monitorin
or other strategy abovLongwall 8b (to addrepotential failure of backfill in overlying Whybrow seam working).
Review site storage capacity for required dewatering volumes.
By Whom/By
-
-
-
ng ve
ess NWU TechnicServices Superintende(31/1/2015).
y When
cal
ent
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS075
IS076
o 10A Subsidence R
Process/Issue
Impact on adjacent hin the Wambo Seam related to LW8B).
Failure of timing or eHomestead backfill pof historic Homesteathe Whybrow Seam)basis of delays in prothe project is comple
Risk Assessment
Ver
e/Activity V
historic workings (predominantly
effectiveness of project (grouting ad workings in . Ranked on the
oduction while eted.
r 2, 01/04/2015
Votes Aspect Type
- Safety
1 Business
e Pl
Geotechnical assWambo mine woinrush control zoPlan. Old Wambo LW10A Review: Branking changedALARP.
Project managemmonitoring/audiwith camera surv(tried and proveinstalled for earldepressurisationInstallation of sefrom Homestead LW10A Review: Hmore progressedcertainty and risk10 to D 4 21.
lanned Controls
sessment on barrier torkings and establishmone in the Inrush Mano mine workings dew
Based on team reviewd from E 5 25 to D 5 24
ment of backfilling – it process. Ability to dveys to confirm effecn technology). Piezomy detection of
n of near surface aquieals to prevent egressd workings down dip.
Homestead backfill prd, thus higher degree k ranking changed fro
Pg 42
Cat
o old ment of nagement
watered.
w, risk 4 - still
Per
ncludes drill holes tiveness
meters
fers. s of water
roject of
om A 4
Bus
L C R
D 5 24
D 4 21
Actions
-
-
By Whom/By
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS084
IS098
IS099
o 10A Subsidence R
Process/Issue
Unauthorised accesssubsidence area fromway, resulting in a sa
Failure to implementExtraction Plan.
Failure to gain approExtraction Plan resultproduction delays.
Risk Assessment
Ver
e/Activity V
to the active m the right-of-afety incident.
t the approved
oval of the ting in
r 2, 01/04/2015
Votes Aspect Type
- Community
- Business
2 Business
e Pl
y
Management meSafety Managemappropriate sign Note: The intentwarnings and maa member of theresulting in an acspecified are appof road damage unknown influen LW10A Review: Band inclusion of arisk ranking was 21.
Clear allocation ofor implementingauditing processregulatory agenc
Consultation witpreparation of thIdentification of applying for the LW10A Review: Ninternal businesssubsidence risk.
lanned Controls
easures outlined in thment Plan, including
age.
t of this risk is that deanagement of affectee public still accesses ccident. The controls propriate for the levewhich is controllable
nce is human error.
Based on experience tan additional longwachanged from C 5 22
of roles and responsibg the Extraction Plan.. Regular reporting to
cies.
th regulators during he Extraction Plan. schedule of works foExtraction Plan appro
Not ranked as this is as approval risk, not a
Pg 43
Cat
he Public
spite ed roads, the area as l/severity . The
to date all, the 2 to D 4
Saf
bilities . Internal o Bus
r oval.
an
-
L C R
D 4 21
D 4 21
- - -
Actions
-
-
-
By Whom/By
-
-
-
y When
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS113
11. Intro
IS115
IS116
IS117
IS118
IS119
o 10A Subsidence R
Process/Issue
LW 10A mined beforpotentially leading toPlan not being approtime.
oduction of LW10A - S
Environmental conseassociated with increabove Longwall 10A.
Potential for changesWambo and Stony Cr10A.
Potential for increaseWambo and Stony Crin potential changes water quality.
Potential fracturing ioutcrops adjacent toBrook.
Potential for impactsgroundwater users oresult of drawdown edewatering in the W
Risk Assessment
Ver
e/Activity V
e LW8B o the Extraction oved at the right
Specific Aspects and
equences eased ponding
s in alignment of reeks above LW
ed erosion in reeks resulting in downstream
n sandstone o Wollombi
s on or baseflow as a effects from hybrow Seam.
r 2, 01/04/2015
Votes Aspect Type
- Business
Impacts
- Surface Wate
4 Surface Wate
1 Surface Wate
2 Land/Heritag
1 Groundwate
e Pl
Internal mine plaConsultation witthe Extraction Plof works for appapproval.Note: Rdelay. LW10A Review: Tproduction impliranking from D 3
er
Implement monimeasures in acco(including the SWUndertaken rem
er
Implement monimeasures in acco(including the SWUndertaken rem
er
Implement Bed aPlan. Implementmeasures in acco(including the SWUndertaken rem
ge Controlled by locdraw.
er
Monitoring and accordance withSWMP, GWMP aexisting water agaffected groundwprivate landhold
lanned Controls
an process and schedth regulators during rean. Identification of slying for Extraction P
Ranked on basis of pro
The team reviewed thications and changed 3 17 to D 4 21.
itoring and managemordance with the WMWMP, GWMP and SGW
mediation where requi
itoring and managemordance with the WMWMP, GWMP and SGW
mediation where requi
and Bank Stability Mot monitoring and manordance with the WMWMP, GWMP and SGW
mediation where requi
cation outside of ang
management measur the WMP (including
and SGWRP). Maintengreements with potenwater users (i.e. neighers).
Pg 44
Cat
ule. evision of schedule lan oduction
he the risk
Bus
ment MP WRP). ired.
Env
ment MP WRP). ired.
Env
onitoring nagement MP WRP). ired.
Env
le of Saf
res in the
nance of ntially hbouring
Env
L C R
D 4 21
D 3 17
D 5 24
Not ranked in the workshop.
Covered by MSEC for
revised LW 10A
RLpaC
C 5 22
B 5 19
Rr1sL
Actions
-
-
-
Review location of LW10A in relation to previous grouting activities on Wambo Creek.
-
Review monitoring borequirements for LW 10A - particularly to thsouth near the MiningLease.
By Whom/By
-
-
-
WCPL EnvironmCommunity Ma(31/1/2015)
-
ore
he g
WCPL EnvironmCommunity Ma(31/1/2015)
y When
ment and anager
ment and anager
Wambo Coal Longwalls 8 to
ORMJ1408
Ref
IS120
IS121
o 10A Subsidence R
Process/Issue
Potential for LW 10Asubsidence cracking historic repairs to Waover Whybrow work9A.
Environmental/subsion South Wambo Crethe confluence area wCreek and potential f
Risk Assessment
Ver
e/Activity V
A to reactivate which required ambo Creek ings panel 9 and
dence impacts eek (in particular with Stony for erosion).
r 2, 01/04/2015
Votes Aspect Type
4 Surface Wate
5 Surface Wate
e Pl
er
Implement monimeasures in acco(including the SWUndertaken remDevelop TARP cothe North WambStrategy.
er
Monitoring and accordance withSWMP, GWMP awhere required.
lanned Controls
itoring and managemordance with the WMWMP, GWMP and SGW
mediation where requionsistent with approabo Creek Subsidence
management measur the WMP (including
and SGWRP). Remedia
Pg 45
Cat
ment MP WRP). ired. ach for Response
Env
res in the ation Env
L C R
D 5 24
RLpaC
D 5 24 RtC
Actions
Review location of LW10A in relation to previous grouting activities on Wambo Creek.
Review piezometer triggers for Wambo Creek (P109).
By Whom/By
WCPL EnvironmCommunity Ma(31/1/2015)
WCPL EnvironmCommunity Manager(31/1/
y When
ment and anager
ment and
/2015)
Wambo CoLongwalls
ORMJ140
12.2 SyAreas of Controls
•
•
Wheel ofTo achievconsidere
The follo
Compete•
•
•
•
Fit For Pu• De• In• In• Re• W
sy
Controlle• Ph
oal 8 to 10A Subs
08
ystems Appintervention need to be coPrevent: Prevpreventative risk, using a dthat cause sitMitigate a Looperate in layo First Res
exampleo Restore/
incidentto a signcontinge
f Safe Producve safe produed:
wing is a gene
ent People andAppropriatelyTrained/educAdequately suHave disciplin
urpose Equipmesigned or seltroduced to scluded in mai
egularly proofWithdrawn froystem.
ed Work Envirhysical enviro
sidence Risk A
proach to Ri
onsidered throventative contcontrol is typ
different procetuations to oposs: Where myers of protecsponse: Whices are enginee/Recovery: W
t – such as limnificant incideency measure
tion (Nertneyction (centre
eral descriptio
d Safe Work Py selected andcated in the prupervised andne processes s
ment lected to meesite to confirmintenance regf tested (safetm service if s
ronment nment such a
Assessment
Ve
isk Treatme
ough their aretrols act in theically aimed aess or providi
perate as requmitigating contction such as:h react quicklered crash dev
Where the coniting a fatal acnt. Mitigating
es.
y Wheel) of the wheel)
Figure 5: W
on of the grou
Practices d appointed procedures andd mentored; asupported in a
et the known om standards argimes to mainty functions);standards are
as the weathe
er 2, 01/04/20
ent
ea of intervene causal pathw
at the root caung multiple haired by the ortrols act to lim
y to minimisevices, pumpintrols restore tccident to a seg controls incl
), certain key g
Wheel of Safe
ups within the
ersonnel, whod practices reqand a just culture.
operating conre met; tain the equipand
e not met and
r, hot/cold, du
015
tion. Controlway to stop inuses of an inciard barriers brganisation; o
mit the outcom
e the consequng systems or the system toerious injury olude emergen
groups shown
e Production
e wheel:
o are; quired in thei
nditions;
pment to man
d addressed t
ust, noise;
s can act to: ncidents from ident – e.g. byetween causer
me of any inci
ence of a lossfirst aid capac the best possor a major env
ncy response c
n in the figure
r role, and are
nufacturer spe
through a rep
occurring. A y designing oues (energy sou
dent – and ty
s event. Typiccity; and sible state aftvironmental icapability and
below need t
e;
ecifications;
porting and br
Pg 46
ut the urces)
pically
cal
er an ncident
to be
reakdown
Wambo CoLongwalls
ORMJ140
• M• Po• Pl• Au
SequencAdditionafocus on
1. El2. Su3. En
•••
4. Sy
•••
5. PP
oal 8 to 10A Subs
08
Management solicies; anned inspecudits and revi
e of Barriers (al controls wethe hierarchy
iminate the Hubstitute/Minngineering Co• Redesign • Enclose • Isolate
ystem Control• Safe Work• Training • Warning DPE (last line of
sidence Risk A
uch as rosters
ctions; and ews.
(Hierarchy of ere developedy of controls a
Hazard imise ntrol
ls k Procedures
Devices f defence)
Assessment
Ve
s, time of wor
Controls) d throughout tas depicted in
Figure 6:
}}
er 2, 01/04/20
rk, communica
the hazard ideFigure 6.
: Hierarchy o
HARD
CO
015
ation, shift ch
entification se
of Control
D CONTROLS
SOFTONTROLS
anges, system
ection of the r
ms generally;
risk assessmen
Pg 47
nt with a
Wambo CoLongwalls
ORMJ140
12.3 R
Rank (L
A
B
C
D
E
Ref (C)
1
2
3
4
5
Tab
Ref (
1
2
3
4
5
oal 8 to 10A Subs
08
isk Ranking
L) L
Almost C
Likely
Possible
Unlikely
Rare
C
Extreme en
Major envi
Serious env
Material en
Minimal en
ble 9: Quanti
(C)
Mo
$10
$5M
$25
Less
sidence Risk A
g Tables
Tab
Likelihood
Certain
Table
Consequence
nvironmental
ronmental ha
vironmental h
nvironmental
nvironmental
itative Meas
re than $1 bil
00M to $1B lo
M to $100 mil
50 thousand (k
s than $250k
Assessment
Ve
le 7: Qualita
Happe
Could
Could
Hasn’t
Conce
e 8: Qualitati
harm e.
arm e.
harm e.ar
harm e.ar
harm e.
sures of Max
lion (B) loss o
ss or product
lion (M) loss o
k) to $5M loss
loss or produc
er 2, 01/04/20
ative Measur
ens often.
easily happen
happen and h
t happened ye
ivable, but on
ive Measure
g. widespread
g. widespread
g. widespreadrea.
g. localised anrea.
g. minor impa
ximum Reaso
Con
or production
ion delay.
or production
s or productio
ction delay.
015
res of Likelih
Desc
n.
has occurred e
et but could.
nly in extreme
es of Conseq
d catastrophic
d substantial i
d and conside
nd considerab
act on environ
onable Cons
nsequence
delay.
delay.
on delay.
hood
cription
elsewhere.
e circumstance
uence
Comment
c impact on en
impact on env
erable impact
ble impact on
nmental value
equence to
es.
t
nvironmental
vironmental v
on environme
environment
es of an area.
Assets/Busi
Pg 48
values of an a
values of an ar
ental values o
al values of an
ness
area.
rea.
of an
n
Wambo CoLongwalls
ORMJ140
oal 8 to 10A Subs
08
Cons
eque
nce
(C)
Notes: L = Low;Risk Num1 = high
sidence Risk A
1 2 3 4 5
M = Moderatmbering: est risk, 25 = l
Assessment
Ve
Table 10
A 1 (H) 3 (H) 6 (H)
10 (M) 15 (M)
te; H = High
lowest risk
er 2, 01/04/20
0: Risk Ranki
B 2 (H) 5 (H) 9 (M)
14 (M) 19 (L)
L
015
ing Table
Likelihood C
4 (H) 8 (M)
13 (M)18 (L) 22 (L)
egend:
Broa ALAR
pract Intol
(L) D
7 (M)12 (M17 (L)21 (L)24 (L)
dly AcceptablRP – As low asticable erable
E 11 (M) 16 () 20 () 23 () 25 (
le s reasonably
Pg 49
M) L) L) L) L)
ORMJ1408 Ver 2, 01/04/2015 Pg 50
12.4 About Your Report Your report has been developed on the basis of your unique and specific requirements as understood by Operational Risk Mentoring and only applies to the subject matter investigated. We have endeavoured to accurately gather information from observations, document reviews and from site personnel. Analysis has been conducted using the best methods of risk engineering science known to the author(s) and should represent a useful suite of information on which the site can base subsequent actions. Even with all these efforts made it is possible that errors may exist in the document or that the recommendations may not be fully effective in avoiding unwanted risks. To that end the reader of this report should be careful – and there is no intention by Operational Risk Mentoring or their associates to provide any warranty of representation, either expressed or implied with respect to this document, its quality, accuracy, merchantability or fitness for a particular purpose is made. As a result, this document is provided "as is" and the reader assumes the entire risk as to its quality and accuracy. In no event will Operational Risk Mentoring be liable for direct, indirect, special, incidental or consequential damages resulting from any defect or inaccuracy in the document, even if advised of the possibility of such damages. The warranty and remedies set forth above are exclusive and in lieu of all others, oral or written or implied. No employee, associate, contractor or other representative of Operational Risk Mentoring is authorised to make any modification, extension or addition to this warranty. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of Operational Risk Mentoring. ©COPYRIGHT Salbury Pty. Ltd. ABN 56 077 700 077