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HISTORICAL RESEARCH REPORTResearch Report TM/72/25

1972

Pneumoconiosis Field Research: Environmental Conditions at Morrison Busty Colliery, 1970 Bradley A, Gibbon E, Thomas P

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Pneumoconiosis Field Research: Environmental Conditions at Morrison Busty Colliery, 1970

Bradley A, Gibbon E, Thomas P This document is a facsimile of an original copy of the report, which has been scanned as an image, with searchable text. Because the quality of this scanned image is determined by the clarity of the original text pages, there may be variations in the overall appearance of pages within the report. The scanning of this and the other historical reports in the Research Reports series was funded by a grant from the Wellcome Trust. The IOM’s research reports are freely available for download as PDF files from our web site: http://www.iom-world.org/research/libraryentry.php

HISTORICAL RESEARCH REPORTResearch Report TM/72/25

1972

ii Research Report TM/72/25

NOT FOR PUBLICATION REPORT NO. TM/72/25

I N S T I T U T E O F O C C U P A T I O N A L M E D I C I N E

PNEUMOCONIOSIS FIELD RESEARCH

ENVIRONMENTAL CONDITIONS AT MORRISON BUSTY COLLIERY, 1970

by

A. Bradley, E. Gibbon and P. Thomas

Environmental Branch,Institute of Occupational Medicine,Roxburgh Place, ;Edinburgh, EH8 9SU. '(Tel. 031-66? 513D December 1972

Report No. TM/72/25




by


CONTENTS

GUMMARY

1. INTRODUCTION

2. MORRISON BUSTY COLLIERY

2.1 Working places and methods of working

2.2 Ventilation and dust suppression

2.3 Manpower and occupational groups

3. SAMPLING AND EVALUATION

3.1 Sampling programme

3.2 Sampling methods and evaluation

*+. RESULTS AND DISCUSSION

4.1 Faceworkers

4.2 Development workers

4.3 Elsewhere underground workers

4.4 Surface workers

4.5 Compositional analysis

4.6 Environmental summary

4.7 Relationship between control point and face concentrations

REFERENCES

TABLES 5-10

Report No. TM/72/25




by

A. Bradley, E. Gibbon and. P. Thomas

SUMMARY

This report tabulates respirable dust concentrations and compositionsat Morrison Busty Colliery for the period 28th April, 1970 to 3rd April1971• Information regarding methods of working, outputs and manpoweris also given.

The colliery had a coalface mean respirable dust concentration ofVO mg/m3. The mean ash content of the respirable dust was 22*8 percent and the mean quartz content 2*3 per cent (concentration 0*08mg/m3X



by


" 1. INTRODUCTION

This report describes the environmental measurements made atMorrison Busty Colliery from 28th April, 1970, when the new standardsfor Approved Dust Conditions (N.C.B., 1969) were introduced, to3rd April, 1971*. All the:routine dust measurements were again madewith the M.R.E. Gravimetric Sampler, Type 113A, but from February,197P instruments had'been*fitted with slotted nosepieces to minimiseturbulent flow- in the elutriator when sampling in high velocityairstreams (N.C.B.; M.R.D.E., 1971).

The stratification of manpower and method of sampling was aspreviously described (Bradley & Gibbon, 1972). Both the 'randomcollier1 and 'volunteer carrier' sampling techniques were used atdifferent periods during the year.

The dust concentrations are presented in a series of face charts,showing the values for different sites and occupations fpom intaketo return in each face area.

The report also gives general information concerning the collieryand examines the relationship between dust concentrations at controlsampling points in return roadways and on.the faces.

2. MORRISON BUSTY COLLIERY

Morrison Busty Colliery is situated in the north-western part of theDurham Coalfield, at Annfield Plain, some 10 miles south-west ofNewcastle-on-Tyne. , ' \ ;

2.1 Working places and methods of working

The seams worked atJr.Mbrrison Busty are, in descending order, Harvey(02:321)**, Busty (02:̂ 11) and Brockwell (02:̂ 70). The quarterlyoutputs obtained from these seams are given in Table 1.

*In this report the term "year" refers to the period28th April, 1970 to 3rd April, 1971 •,"•

** National Seam Correlation Code .''

2.• TABLE 1 ' ' "'

Colliery outputs (tons)

N̂»_ Seam

PeriooX.

1970April-JuneJuly-Sept .Oct. -Dec.

1971Jain. -March

TOTAL.

% Output

Harvey Busty

\

i2k 22121 61522 362

. 28- 1.46

96 344

4o

23 92817 35128 162

35 ̂ 26

104 867

43

Brockwell

•16 39414 7878 989

• : . , 496 .

. 40 666

1?

Total

64 54353 753;59., 515

•. 6.4 068

241 877

100

Other seam details are given in Tables; 5-9. " . ' . ' ' .^ . . • ' '• ' *' ;

The two faces in the Busty Seam were single unit, longwall advancing,power loaded by rapid ploughs and usually worked two productionshifts in the 24 hour cycle.

The faces in the Harvey and Brockwell Seams were all worked by"N.C.B.Scrapers. They were double unit longwall advancing faces and\u?ually worked three production shifts in the 24 hour.cycle.

Further details-of the methods of working, machinery and supportsfor individual faces are given in Tables,.5-9•

2.2 Ventilation and dust suppression

Average air quantities, dry and wet bulb- temperatures and relativehumidities for the various faces are given in Tables 5-9.

Dust suppression measures/were applied on all faces and in-air dustproducing activities. The main methods of dust suppression adoptedare described in-the tables and were similar to those noted'in thereport for 1969 (Bradley & Gibbon, 1972). . . ' " , . '

Martindale Type "T" dust respirators were available and were usedmostly by facemen in the Busty Seam during periods of high dustconcentration.

2.3 Manpower and occupational groups

The total colliery population at the end of the year was approximately650, of whom 276 were classed as faceworkers, 30? as non-faceworkersunderground and 67 as surface workers.

With the run-down in manpower over the previous two years, and the .concentration of production into a few face areas, a review of thestructure of occupational grouping was made in April, 1970. Thisresulted in the closing of a number of face occupational groupsassociated with hand-filled faces'and replacing all the 29 elsewhereunderground groups by flvo new groups. Later, two of these

3.elsewhere groups, E79» Conveying, All Seams and E80, Haulage andGeneral Workers, All Seams were combined to form E84, Haulage,General Workers and Conveying, All Seams.

Thus, the total number of occupational groups at Morrison Busty in1970 was as follows:

Face groups 13Elsewhere underground groups kSurface groups 3 .

3. SAMPLING AND EVALUATION

3.1 Sampling programme

From April to September the 'random collier' technique was used andthe distribution of sampling shifts was as set out by Ashford &Smith (1956). Of the 119 samples taken during this period, 6k werefor faceworkers, 50 for non-faceworkers underground and five forsurface workers.

From October, 1970 sampling was carried out by volunteer instrumentcarriers as described previously by Bradley & Gibbon (1972). Eachvolunteer was asked to take a sampling instrument to his workingplace at approximately fortnightly intervals.

The volunteers, 5*f faceworkers, 5 developers and 9 non-faceworkerswere selected to cover most occupational groups on all shifts, onall faces and elsewhere underground. No volunteers were obtainedfrom occupational groups such as tradesmen and officials as themen in these groups were either carrying other equipment or movingaround for most of the shift.

The number of samples obtained from the start of the. 'volunteercarrier1 technique in October to the end of the year was 529. Ofthese, 433 were for faceworkers, 88 for non-faceworkers undergroundand 8 for surface workers. The surface samples were obtained bythe unit investigators.

In addition, 10 samples were obtained at control points, 70m fromthe various faces along the return roads.

3.2 Sampling methods and evaluation

The methods of sampling and evaluation of respirable dust concentra-tions and subsequent compositional analysis of the dust continued asdescribed in previous reports (Harrison, 1971? Bradley & Gibbon,1972).

k. RESULTS AND DISCUSSION . .

4.1 Faceworkers

The face summary charts (Tables 5-9 at end of report) show the meanconcentrations of respirable dust for each quarter of the year forall occupational groups. Face mean concentrations weighted to takeaccount of the number of men per occupational group and also cal-culated on a mean sample basis are given. In general, there islittle difference between the two methods of calculating face meanconcentrations. Ash arid quartz concentrations are shown for faceand for site only.

The face mean respirable dust concentrations for coal filling shiftsranged from 2*1 mg/m3 for N10 face to 6*3 mg/m3 for BQ5 face with amean value for all faces of 4*0 mg/m3, slightly lower, than thecorresponding concentration for 19.69i

The groups associated with the highest mean respirable dust concen-tration were the rippers working in the.advance headings of theintake and return roadways of BQ5 face. Mean concentrations of8'2 mg/m3 and 10'9 mg/m3 were obtained for these two groupsrespectively.

c

Preparation shifts were a mixture of coaling and preparation.Fifty-one samples were obtained for these shifts and the resultingmean respirable dust concentration was k*1 mg/m3 - a value muchhigher than the corresponding value for 1969 and even slightlyhigher than the mean respirable dust concentration for all faces,all seams for 1970. That 9̂ of these samples were obtained on theBQ5 and BQ6 faces reflects the dustier conditions in Busty Seamcompared with the others. .

4.2 Development workers. -•

Tables 2 and 3 below summarise the results of the 91 samples takenduring development work in coal and stone drivages respectively.

. • ' ' ' : .. ''TABLE 2 .. • . •

Development in Coal .

Seam

Occupation

O.G.S.N.

Mean Resp. Dust Cone, (mg/m )No. of samples . .. .Standard deviation

Ash Cone. mg/m

.Quartz Cone. . mg/m

Busty

Diggers Dev.

F191

3-66 •

1.«8

1-13

0-19

Brockwell

Diggers Dev,

, F191

4'99

.-- 3*0 •

.:. ,1'54.

0'26

All

r •

k-k15

2«6

1'38 -

0-23

TABLE 3 .

Development in Stone

Seam

Occupation

O.G.S.N.

Mean Resp. Dust Cone, mg/mNo . of samplesStandard deviation

Ash Cone. mg/m

Quartz Cone. mg/m

Harvey

DiggersDev.F191

i-5 -32;i«o

0-4?

0'08

Busty

DiggersDev.F191

V6143'7 .

1-45

0-24

Brockwell

DiggersDev.F191

2*330.1/9,

0-72

0*12

All

2-4762-3.

0'?6

0-13

5.

"3 Elsewhere underground workers

Details of the elsewhere underground concentrations, mean, 1*5 mg/m'are recorded in Table *f.

TABLE k

Elsewhere Underground Concentrations

O.G.S.N.

B81E82

. E83E8*f

Occupation

' • - • . ' •

Outbye Stonemen. •Tradesmen andOther Officials

Deputies & OvermenHaulage & GeneralWorkers ,Conveying

All Occupations . .

No. ofSamples

283

., 1101

133

MeanCone .•mg/m3

2-50-7

2'51-3

1-5

StandardDeviation

2*20»3 '

-1-1

1-5

AshCone.mg/m3

0-950-12

0-MtO'te

0-50

QuartzCone.mg/m3

0-080*01

0'0*t0-03

0-0̂

k»k Surface workers

Twenty samples were obtained for surface workers.' The meanrespirable dust concentrations for the three, occupational groupswere: ' . , . . . -

Washery attendants" Heapstead' attendants

' Surface Others

Compositional analysis

1-2, 0*3 mg/m0*3 mg/m

The compositional analysis of respirable dust consisted of thedetermination, for each occupational group, of the ash, quartz,kaolin, mica, calcium and magnesium carbonates and iron carbonatecontents of samples (Harrison, 1971).

The ash and quartz concentrations for each site are given inTables 5-9 and the detailed composition of the ash for the variousseams and general environments in Table 10.

For coal-getting operations the ash contents of samples from thevarious faces were very similar, ranging from 19*7 per cent (N14 face)to 2V3 per cent (BQ5 face). The values for development work andelsewhere underground were higher at 31*5 per cent and 33*2 per centrespectively.

Quartz contents of samples from coal producing shifts ranged from1**f per cent for the Busty Seam to 2*8 per cent for the Harvey Seam,The preparation samples, which were mainly taken in the Busty Seamcontained 2*2 per cent quartz. The quartz content of elsewhereunderground samples, 2*7 per cent, was similar to that for facesamples but for development work was much higher at 5*3 P*>* cent.

'6.

The quartz concentrations were very similar for ail faces at aboutO08 mg/m3. . . . • . • • .j . . : •

k*6 Environmental summary

Table 10 lists mean dust concentrations for faces and other classesof work; face concentrations are weighted by the number of men inthe occupational groups. For comparison, mean concentrations aregiven .for the proceeding two years. • - . . , - . ........

Of the three seams worked at Morrison Busty, the Busty Seam continuedto be the most dusty. Inv general, the level of dustiness duringcoal-getting operations (mean cone. Vo-mg/m3)-- was" lower 'than that":of 1969. The respirable. dust concentrations for preparation and .coal development work were < slightly higher that for coal-gettingoperations. There was a change in the value for elsewhere under-ground samples from 2*9 mg/m3 in 1969 to -1*5 mg/m3 in the currentyear. . . - . : • • ' - . ' " • • •

V? Relationship between control point and face -concentrations

The .mean respirable -dust concentrations obtained at the controlpoint. (70m from .the face --in the-returri road) for the various faces"are given in Tables 5-9 and from Table 10 it can be seen,.. that theratio of return road concentration to face concentration "rangedfrom 0'50 to 1*15.

The mean value of this' ratio for the colliery, i.e., the ratio of,the mean concentration of all samples taken at the control point onthe coal-getting shifts to the mean of all, the face samplesexcluding preparation and development work, was 1> 26, only slightlylower than the value of 1»*t used by Jacobsen, Rae & Walton (1969)in the Interim Standards Study.

R E F E R E N C E S

Ashford, J.R. & Smith, P.H. (1956). The allocation of samplingeffort in environmental surveys-. N.C^B. Report -No. SC370/ER/28

\ .iBradley, A. & Gibbon, E. (1972). Penumoconiosis Field Research:Environmental conditions at Morrison Busty Colliery, 19&9»Institute of Occupational Medicine Report No. TM/72/15

Harrison, G.E. (1971). Analysis -of gravimetric filters .taken' atMorrison Busty Colliery (1970 - Parts I and II). Institute ofOccupational Medicine, File No. BP31013

Jacobsen, M., Rae, S. & Walton, W.H. (1969). The relationshipbetween dust and penumoconiosis as the basis of a gravimetricstandard for airborne dust underground. N.C.B. Report No.ISM/P(69)11

National Coal Board (1969). Approved conditions for airbornedust. Standards and procedures for sampling,

National Coal Board,' Mining 'Research and" Development Establishment(1971). M.R.E. gravimetric dust sampler type 11.3A instructionsfor operation and maintenance. MRDE Handbook No. k

TABLESFACE SUWARY

Seam N.C.B.Seam Corr. Coal Rank

• Code Code

Busty , 02:411 301a

Site " ;

Method of working

Machine details

Dust suppression

. Supports

•

Site

Occupation(Fitting Shifts)

O.G.SJ).

Number of Men in Occupational Group

Mean Respirable 1st Quarier

Dust 2nd Quarter

Concentration 3rd Quarter

for Occupation ' ' ' '3 4th Quarter

mg/m - —Year

Mean Sample Concentration 3for Site mg/m

Ash Concentration mg/mjQuartz Concentration mg/m

Face . Face ' Type of Face Length Height% ' Starting Finishing —

Carbon Date Date

88 Jan. 1970 . . , . Single unit

Intake Roadway

Hand filled

Hounan drilling machine.

Wet drilling, short holeinfusion, water ampoule,

'sprays

3.66m x 2.44m .arch girders

0

Face Beltmen

F56

2

1.8 (1)

1.8(1)_

1.8 (1)

0.460.04

Intake Stable

Hand filled

Pneumatic pick

Short hole infusion

Hydraulic props andGroetchel bars

91m . 0.84m

\

'

.• . •

2

Rippers

Fifl

6

9.1 (1)

8.2 (2)

7.2 (6)

9.0 (7)

8.2 (16)1.5 »

8.2 (16)1.5*

2.28p.15

Face

p56

2

5.6 (1)

-• — •

5.6(1)

Site 0 .Occupation .

(Preparation Shift)O.G.S.N.


Mean RespiraRe Dust Concentration ,for Occupation og/ir

Mean Sample Concentration 3for Site rag/si

Ash Concentration mg/miQuartz Concentration mg/ir

Tradesmen

F190

2

.̂2 (1)

SteelCheckers

E79

2

2.3(1)-

2.0 (3)

Overoen

E83'

2

1.4 ll)- .

, 0.5 .

0.44, 0.03

' I 'Rippers < Rippers

F48 } F48

4

4.2(2)0.1

4.2 (2)

1.17 I

4

7.7 (3)0.4

7.7 (3)0.4

2.140.08 [ 0.14

( ) Number of Samples

CHART BQ5FACE

Shift Cycle

2 Productionshifts

_JL

Face

Power loaded

97kli plough

AverageOutput

per Shift

173 ton

Sprays on Intake and returnend of face conveyor andface transfer point

Westphalia self -advancingsupports

Roof

Siltstone

. Return

Seam •

Coal". .

Stable-

'Hand filled

Pneumatic pick

Short hole infusion

Hydraulic props andGroetchel bars

Floor .

Argillaceousseat! earth

Return Roadway

Average TemperatureVentilation Dry 23.3°

Quantity ' Wet 21.1°, 4.97m Vs R<H- ** .

Hand filled

Hounan drilling machine

Wet drilling, short holeinfusion, waterampoule

3.66m x 2.44march girders

Remarks

•

1

Bellmen

-

5J2..;1.10.(

*

Plough Team

F181

8

8.0 (5)

6.4(4)

4.9(27)

5.4 (32)

5.4(68)2.2

.".(69)>

8%

6

Rippers

F48

- .; • 6 • •• •

10.0 (5)

-i - 19.1. (2)

9.7(12), ,.

11.0 (12)

.. 10.9(31)4.2

10.9 (31)4.2

3.05 ' •0.20

7

Rippers " *

F48

6

3.5(1)

3.5(1) .-

3.5 (1)-

0.930.05

9

Shotfirers

F60

2

3.9(1)

3.9 (1)-

3.9 (1)

0.630.07

i

8

ControlPosition

•

8.6; (2)

8.0(3)

8.3 (5)0.6

1.480.14

WholeFaceMean

6.3 +

V3.7 * '

1.800.11

4Rippers

F48

4 •

5.3(9)1.55^ Cj)1.9

1.480.10

6 'Rippers

F48

• 2 •

7.4 (7) -1.8/«4 \i)1.8

2.070.13

7Rippers

F48

2

3.9(1)-

•5.9 (1J

•1.09 '0.07

Shotfirers

F60

.1. .

. 1.5(1)- .

9Steel

CheckersE79

1

10.7 (1)-

6«1 12}' 4.7

' 1.45 .0.11

8 'WholeFaceMean

4.8

5~^3.1 '

U50.10 '

* Standard'bevlation MarHieighted MeanTABLES

TABLE 6FACE SUWARY

SeamSean

Busty

Seam .Corp.cp<te02:411

N.C.B,Coal Rankqoda

301a

Site

Method of working

Machine details

Oust suppression

Supports

Face% Starting

f,firt(pfl P'ltft

88 Oct. 1970

Face -Finishing

Pa-fa

TvBe'of Face Lenoih J(efqht

Single unitLongwall .

' advancing 113m 0.89m•

I ntake Roadway

Hand filled'

Holroan drilling. machine

Bet drilling, water anpoule

3.66m x 2.44m arch girders*

Face

Power

97W'J plough

Sprays atpoint

Westphaliaprops

Site

Occupation(Filling Shifts)

O.G.S.N.

Number of Hen in Occupational Croup

Mean Respirable

Dust; • •

Concentration

for Occupation3

mg/m

1st Quarter"

2nd Quarter

3rd Quarter

4th Quarter

- Year '

Mean Sample Concentration ' 'for'Site .-' , mg/np

• Ash Concentration mg/m^Quartz Concentration" mg/ra3

1 2

'

i . '

.

* . >i -

• ••

»

'. • • • ..

v,;7;/'y""

Plough Team

, F181

7

. X

- - • - . '

?,n /?) :

5.7(23)

5.6 (28)2.9 »

5.6(28)2.9-»

1.2V0.07

PREPARATION

Occupation

O.G.S.N.'


Mean Respirable Dust Concentration' ,'j for Occupation rag/m

Mean Sample Concentration 3for Site mg/m

Ash Concentration mg/ra^Quartz Concentration ig/r

; Rippers

1 • F48

4

. 2.5(8) ....- 1.0

\ 2 .5(8) .1.0

-' 0.660.04

Rippers

F48 [

4 -

3.8(2). ,1.0

3.'8(2)1.0

1.010.06 .,

Plough Team

F181

14 -

. • • : • • • • & ? : • •3.9 (2)i.r0.86 • -,0.05 .


CHART ; BQ6 FACE

Shift Cycle

1 Productionshift

loaded

AverageOutputper Shift

160 ton

Roof

Siltstone

; ., -.

face transfer

self-advancing

Seam

Coal

Return

Hand filled

Floor

Argillaceousseatearth

Roadway

Average Temperature CVenti latlon ,o

Quantity . Dry 21.1.„ „ H°+ iq.^

4.47s 3/s R.H. 89*

Ho Iman drilling machine

l-Jet drillingHater ampoule

2.74m x 2.13m arch' girders

Remarks

.

6 " • • • ' •

Rippers

. F48

2

.

4.8 (1)

4.8(1)

4.0 (i)

1.Z8... . ... 0.07

8

• Control • •Position .

2.8(1)

<:.o(i)

0.50, 0.05

1

1,'holeFaceMean

'•

5.6 +

5.6'2.9

13S0.07 <29)

SHIR

.

Rippers

F48

4

2.4 (3)fi-4

2.4 (3)0.4

0.640.04

Rippers

F48

4

3.4 (7)1.63.4 (7)1.6

0.900.05

i>WholeFaceMean

3.4

3.01.3

0.780.05

* Standard Deviation Man-weighted Mean TABLE 6

TABLETFACE SUMMARY

Seam

Harvey

Site

Method of working

SeamCorr.Code

02:321

„ N.C.B.,Coat Rank

Code

301b

Machine details

Dust suppression

Supports

Face% Starting

Carbon Date

86 Sept. 1969

FaceFinishing

Date

Sept. 1970

Type of Fare ^spflth Hftight

Double unitLongwalladvancing 180V 0.56m

I ntake Roadhead

Hand filled

Pneumatic picks

Sprays on conveyor

3.6m x 2.44m arch girders* *

Face

Power

N.C.B. scraper

Hydraulicprops and

Site

'Occupation(Filling Shifts)

O.G.SJ.


Mean Respirable

Dust

Concentration

for Occupation3

ng/tn

1st Quarter

2nd Quarter

3rd Quarter

4th Quarter

Year

Mean Sample Concentration 3 •for Site ' mg/fli

Ash Concentration mg/m|Quartz Concentration ng/nr

1

Rippers

F148

12'

4

Scraper Attendants

F164

21

0.9 (1)

0.9 (1)

- 0.-

0.0.


CHART N10 FACEsnm cycle

3 Production1 Preparation

Average -'Outputper Shift

150 ton

• Roof

Sandstone

Seam

Coal

Floor

ArgillaceousSeatearth

AverageVentilation

Quantity

2.32m 3/8

Temperature CDrv 2flO

. Wet 18.3°

Return RoadheadMain Gate Right Tailgate

Remarks

loaded

box, 75kH hoist

chocks, Oobsoncrowns

Hand filled

Holman drilling machine

1.83m x 1.83m arch girders

Face Belt men

F55

6

JI_^_"

6

RTppers

F148

12

4.0 (1)

> 4.0 (1]

4.0(1)' "

0.840.15

7

Rippers

F148

12

2.3 (1)

2.3 (1)

2.3 (1)

0.480.09

ControlPosition

. ... — . _.„ ...

1*0 1 eFaceMean

— —

2.1 *

.2.4 m1.6 V>

0.490.08

Standard Deviation + Man-weighted Mean

TABLE 7

_ ,_

Seam

Harvey

Site

Method of working

Machine details

Dust suppression

Supports

'

Seam .'Corr.Code

02:321

TUX"Coei fan

Code

301b

]

k %Carbon ,

86

Face .Starting

[ -Daie

May, 1970

FaceFinishing

Date .

TABLESFACE SUMMARY

Type of Face Length Height-•:" k " -r — ̂ • ••• ..- ~ —

Double unitLongwall jadvancing; . ' 165m 0.53m

Intake Roadway •

Hand filling

i

i

Pneumatic pick

3.66m x 2.44m arch girders

Face

Power

f

N.C.B. scraper box

Sprays at face

Hydraulic chocks,and crowns

Site i 1

'Occupation(Filling Shifts)

Number of Men 16 Occupational Group

Mean Respirable

Oust

Concentration

for Occupation

mn/m

' i i in. • i-i in i i

—'1st Quarter

2nd Quarter

3rd Quarter

Drillers | Rippersi

•

3 4 6

. — _1

0.8(1) !] 1.0(5)1 T

4th Quarter 0.8 (4)r ! 0.8(1) 0.9(9)Jear i - 0.2 »

Mean Sample Concentration 3 i 0.9 (10) '•for Site

;Ash ConcentrationQuartz Concentration

mg/m ! • 0.2 * ^— _ ~

mg/ir0.18"0.03 '

4

Scraper attendants

21

0.5(1)

L. -1.9 (32)

...— ,.. ..»,....»..»...,.,, ..«M..,,,.M,, , , *„. . « *

—1*5138)1.7(71)0.8

' ' 1.0.

0.0.

1.8 (97)

( ) > Number of Samples

CHART NH FACE

Shift Cycle

3 Productionshifts

Average RoofOutput

• per Shift. Sandstone

125 ton i •

loaded

73kW hoist

transfer point

Dowty props

Seam

Coal

.. '

Floor

Argillaceousseatearth

Return RoadwaysCentre Gate

Hand filled

Holman drilling machine

.'.Wet drilling .Hater ampoule

3.66m x 2.44arch girders

•

; Left Tai Igate

Fired," fi.lled ' '

••Atlas Copco shovel," VHolman drilling machine

.Wet drillingWater ampoule

3.66m x 2.44m ' :

arch girders

Average Temperature CVentilation 'Dry "19~.4"o"

Quantity 'Wet 17.8 °- i>«n« OOjb

1.79n3/s

Remarks

, . , . . . . ,

. . .«

Face Beltmen

F55

6

. V ' ' • <.

2.2(11) .

2.1 (15)Z.Z (Z6)1.0

' ' '

6 . . ; . . -

Rippers

F148

9

4.9 (18)

4.3(17) ,4.6 (35)2.2

- 4,6(35)

- , 2.2 -- :; 0.97

0.18

. 9.

Overmen

E83

' . . . ?

V

2.4(1)

2.4(1)

| ' 2.4(1)' ' V r' t . ; * " '.

' 0.420.03

8

ControlPosition

3.0 (2)

1.4(1)

' •

2.5(3),1,0 -0.610.09

WholeFaceMean

!

2.2 +

2 J» / < I7 \

0.48 '0.07

* 'Standard Oevitation + Man-weighted Mean

TABLE 8

TABLE 9FACE SUMMARY

. — ' " -' ' —

Seam

Brockwell

SeamCorr.Code

02:470

N.C.B.Coal Rank

Code

301a

Site

Method of. working

Machine details

Dust suppression

Supports

*

1

% "Carbon

..90 ,

Face FaceStarting Finishing

Date Date

May 1969. .Dec. 1970.

Type of Face Length Height

Double unit ;•Longwalladvancing 174m 0.61m

Intake RoadheadsLeft Tailgate (2.) Centre Gate (1)

Fired, loaded

r;

• Atlas Coped shovelHolman drill

Wet drillingWater ampoule


Hand filled

Holman drill

Wet drilling.Hater ampoule


Face

Power '

N.C.B. scraper box

Face naturally • .

Hydraulic chocks,props and crowns

•-i-jj

Site

Occupation(Filling Shifts)

O.G.S.N.


Mean Respirable

Dust

Concentration

for Occupation3 -

mg/m

*

1st Quarter

• 2nd Quarter

3rd Quarter

4th Quarter

Year*

Mean Sample Concentration 3for Site mg/ro

Ash Concentration mg/m3Quartz Concentration mg/m3

0

Snottirers

F60

2

2.2 (1)

2.2 (1)-

Z.Z C\) }•

0.350.04

1

Tappers

F53

4i - i••

1.5(1)

2.4(3)

2.2 (4)0.4 * -2.Z (4J ,0.4*

0.510.09

— .1 ..-.- ' ;T,

2

Rippers

F53

4

1.8 (2)

•1.8 (2)0.91.8 (£•}0.9

0.490.08

4

Face Bettmen. *

F57

4

1.9(1)

3.4 (1)

.1.4(7)

1.6 (9)0.9

Borers

F128

2

4.0 (1)

.

4.0 (1) |- I

2.B (W)1.7

0.640.07

PREPARATION

Occupation

O.G.S.N. .

Number of Men in Occupational GroupMean Respirable Dust Concentration -,for Occupation rag/mMean Sample Concentration ,for Site mg/mAsh Concentration mg/m2Quartz Concentration mg/nr

Rippers

F53

2

1.7 (2)

1.7 (2)0.460.07


CHART S18 FACE

Shift Cycle

2 Productionshifts

AverageOutput

per Shift

110 ton

loaded

75kH hoist

wet

Doirty

Ropf

Siltstone

soan

Coal

Floor Av°ragp Tempfiraturs C •Ventilation Dry 21.5°

Argillaceous Quantity |.|gt 19.6"seatearth .: R u aid

2.90m 3/s R'H' ^

Return RoadheadsLeft Tailgafe (1) Centre Gate (2) Right Tailgate

Fired, loaded

Atlas Copcoshovel

Holman drillingmachine

Met drillingHater ampoule


Hand filled

Pneumatic pick

^


Hand filled

Pneumatic pick

!


Remarks

(1) Period Oct. - Dec.

(2) Period Apr. - Sept.

Scraper Attendants

F18620

2.9(1)

4.2(6)

2.8 (23)

3.1 (30)1.8

6

Rippers

F534

3.9 (5)

3.9 (5)I-5 - i -3.y p;1.5

1.060.17

7

Rippers

F534

3.2 (1)

3.2(1)•

3.2 (1)•

0.750.07

9

Face Beltmen

F57

4

3.5 (1)

4.2 (1)

2.8 (4)

3.1 (6)n.93.1 (6)0.9

0.640.07

8

ControlPnsitinn

3.1 (1)

3.1 (1)

WholeFace

..Mean

2.9 +

2.91.5

0.660.08

SHIFT

,

WholeFaceMean

1.7

1.7(2)

6.460.07

* Standard Deviation + Han-weighted MeanTABLE 9

TABLE 10

SUMMARY OF. DUST CONCENTRATIONS AND COMPOSITION BY FAC? .AND GENERAL ENVIRONMENT

Class of Environment

Mechanised filling

Preparation

Development

COALFACEAll shifts

Stone drifting

Elsewhere underground

Surface

Seam

Busty

Mean Resp. • ; Compositional Data for 1970I Dust Cone, mg/nr

Face1968

BQ5

B Q 6

Seam Mean 4.4

Harvey N 10

N 14

Seam Mean

Brockwell S 18

2.6

!

Seam Mean j 4.6

All Seams Mean 3.6

All Seams

0

D

n

2.5

A.9

3.8

2.5

" 1.9

1.2

1969

6.9

6.4

3.8

3.1

4.1

4.1

4.3

2.6i — I

5.7

4.7

2.9

0.7 I

1970

6.3

5.6

(148)

2.1

2.22.2

(146)

2.92.9

(59)4.0

(353)

(SI).u(15)

ControlFaceRatio1970

1.15

0.50

1.04

Mean Cone. j Ash

Ash

1.80

1.24

' 1.69

0.49

0.48

0.48

1.07i

0.66

0.66

f'

i4.0 j

i

z.4

1.02

1.07

1.38

1.041.04 +

0.76

Quartz „ .rag/in^

0.11

0.07

Coeposition of Ash

Quartz Kaolin .Mica \ Ca. Mg. i Ironsample a <i

24.3

22.3

0.10 23.9

0.08

0.07

0.07

0.08

0.08

0.08

0.07

0.23

0.080.12 +

0.13

(133) i ! 0.50 1 0.040.8 i : \

( 20) ! 0.09 0.01

20.9

19.7

19.7

23.1

23.1

21.9

26.1

31.5

22.822.2 +

31.5

33.2

10.9

t

1

5.9

14.1

11.2

10.2

6.8

16.9

10.011.6 +

16.9

8.1

9.3

38.5

28.3

45.1

35.4

29.1

25.8

34.324.9 +

25.8

38.5

32^

% • i Carb.

10.8

30.5

17.0

20.0

13.7

30.6

19.615.4 +

30.6

13.9

23.9

16.1

8.1

6.0

11.1

16.7

15.1

11.97.0 +

15.1

19.5

!

Carb.

...3.0

5.6

7.5

4.8

1.9

6.4

4.58.7 +

6.4

4.7

Values for 1969 ( ) Denotes Number of Observations

HEAD OFFICE:

Research Avenue North,Riccarton,Edinburgh, EH14 4AP, United KingdomTelephone: +44 (0)870 850 5131Facsimile: +44 (0)870 850 5132

Email: [email protected]

Tapton Park Innovation Centre,Brimington Road, Tapton,Chesterfield, Derbyshire, S41 0TZ, United KingdomTelephone: +44 (0)1246 557866Facsimile: +44 (0)1246 551212

Research House Business Centre,Fraser Road, Perivale, Middlesex, UB6 7AQ,United KingdomTelephone: +44 (0)208 537 3491/2Facsimile: +44 (0)208 537 3493

Brookside Business Park, Cold Meece, Stone, Staffs, ST15 0RZ,United KingdomTelephone: +44 (0)1785 764810Facsimile: +44 (0)1785 764811

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