LEDO OCP DETAILS.

1) HISTORY:

Introduction

The Ledo OCP ( area 0.85 Sq. Km.) situated in Northern part of Makum Coalfield

situated at 10Kms North East of Margherita town i.e. HQ. of NEC (CIL) and 60Km. south east

of Tinsukia district. The area is connected to the rest of the country by NH.38 and BG Rly line

which extends upto Tirap siding which is 1.5 Km of the west of the property.

The project is surrounded by Ledo town in the west, Ledo pani nullah in the east

and Tirap OCP in the South Eastern side. Sixty percent of the area under reference is builtup area

and occupied by surface structures i.e. Rly line, NH, Colliery workers residential quarters, brick

factory etc.

The project is planned to be executed in form of three pits namely Pit I, Pit II and

Pit III . At present Pit II is in operation.

Geology:

Ledo Mechanised OCP block, covering an area of 0.85 sq km, is situated in the

Northern part of Makum Coalfield and is defined by North latitude 27o- 17‟-25” and 27

o-17‟-

50” and East longitude 95o – 45‟ to 95

o-45‟-45 ” falling in the Survey of India Toposheet

No.83M/1.

The coal bearing Tikak-parbat formation in Ledo mechanised OCP is disposed as

an elongated E-W trending isolated closed “Synformal basin” surrounded by older Baragolai

formation. The E-W trending longer axis stretches about 1.5 km while the N-S trending shorter

axis stretches just about 300m. The western closure of the synformal basin is wider than that of

the eastern closure. The strate in general strike in an E-W direction in both the limbs with local

swings leading to development of minor warps. Existence of four seams viz. „60 ft‟, „7ft/new

seam‟, „20ft‟, and „5ft‟ seam has been established in this block. The bottom most 60‟ seam is the

most important coal seam. The other coal seams are impersistent and have very limited area of

disposition. The 60‟ seam is almost virgin in the entire block except a small linear stretch in the

southern limb where the seam has been extracted manually through OC method. The 60‟ seam

occurs splitted at most places.

The 7‟/New seam is not well developed within the area. The 20‟ seam is restricted

to two small axial regions in the east and the west. 5‟ seam is the youngest seam developed in

this region and its development is restricted to very small patches in the eastern part only.

A net geological reserve of 6.22 MT from 60‟ seam only has been considered for

the purpose of estimating the quarriable coal. Available small quantity of quarriable coal reserves

from the other younger seams have been taken as an overburden and may be considered as bonus

over the total resources of 60‟ seam.

Reserves and Coal Characteristics:

Total Reserve: 6.22 MT

Mineable Reserve: 1.68 MT

SL. No. Particulars Unit Pit-I Pit –II Pit-III Total

1. Mineable

Reserves

Mt 0.29 1.03 0.36 1.68

2. Overburden

Quantities

Mn3 1.49 6.02 1.30 8.81

3. Stripping

Ratio

M3/t 5.13 5.84 3.61 5.24

Rate of Production: 0.15 MT per Annum.

Life of Mines: 14 years.

Grade of Coal: Grade G-1 & G-2.

Grade Ash % : Moisture %: V:M:% Gross Calorific Value

G1 5 - 8.3 2.3-2.61 39-41 7300-7400 Kcal/ Kg

G2 11.3- 13.5 2.3-2.7 39-41 6700 - 7000 Kcal/ Kg

2) PERFORMANCE ACHIEVED :: PRODUCTION

Year Coal Lakh

(Tonne)

OB Lakh (Cum) S.R

2008-09 0.39 3.67 1:9.4

2009-10 0.84 6.95 1:8.2

2010-11 1.14 7.3 1:6.4

2011-12 1.27 7.63 1:6

2012-13 1.27 6.11 1:4.8

2013-14 0.96 7.46 1:7.7

2014-15 0.001 1.06 1:106

2015-16(UPTO JAN

2016)

0.34 8.90 1:26.1

3) PERFORMANCE ACHIEVED :: DESPATCH

Year Despatch (Lakh

(Tonne)

Transporting (Lakh

(Tonne)

Offtake (Lakh

(Tonne)

2008-09 Nil 0.39 0.39

2009-10 0.34 0.49 0.84

2010-11 1.02 0.05 1.02

2011-12 1.03 0.14 1.02

2012-13 0.84 .012 1.18

2013-14 0.80 0.38 1.23

2014-15 0.27 0.09 0.89

2015-16(UPTO JAN

2016)

0.12 0.00 0.12

4) PRESENT PRODUCTION OF OB & COAL STATUS (AS ON 2/2/2016)

COAL =34174 Tonnes

OB =890743 Cum.

5) PERMISSIONS OBTAINED:

List of Permission & Clearances Obtained:

Date of opening 22-08-2008

NOC with respect of mine water pumping from

Central Ground Water Authority

13-10-2008

Environmental clearance obtained from MOEF 12-12-2008

DGMS permission obtained 02-02-2009

Coal controller permission obtained 31-03-2009

Controlled blasting permission obtained 16-10-2009

Permission for use of HT electrical installations 05-01-2010

Consent to operate mine by APCB 25-06-2012

6) MACHINERY STATUS( Contractor’s machineries)

Sl.No ITEM AVAILABLE

1 EXECAVATOR( volvo 480, 2.5cub. met) 02

3 DUMPER(MERCEDES 25 TON) 12

4 DOZER(KOMATSU D-65) 02

5 ROAD GRADER(KOMATSU) 01

6 Water Tanker(AMW) 01

7 DIESEL BROWSER 01

CIL machineries- One Pay Loader

7) MANPOWER DETAILS: WORKERS = 127 (INCLUDING STAFF)

OFFICER = 06

8) ENVIRONMENT ::

STATUS REPORT ON ENVIRONMENTAL PROTECTION MEASURES

Name of the Coal/lignite mine/block: LEDO OCP

a) Type: OCP/UG/Mixed OCP

b) Total life of the mine: 14 years

c) Balance life of the mine: 07 years

Name and address of the owner: North Eastern Coalfields

Coal India Limited

Margherita, Assam-786181

Environmental Clearance Approved by…… (on date) Ministry of Environment & Forest

12/11/2008

i) Leasehold area of the Mine: 101.00 Ha.

ii) Project Area of the Mine: 61.00 Ha.

iii) Mining Area 22.56 Area

Mine Closure Plan approved

by……………………………(on date)

Coal India Limited Board.

02/08/2013

Reserves of Coal/Lignites (as per mining plan): 1.68 MT

Details of aforestation: Year Plantation done

2014-15 3000 Nos.

2015-16 200 Nos (till date)

Details of Water Quality Management

a) All the pumped out effluent from the mines is taken to effluent treatment plant

(ETP) where they are treated with lime,

alum and polyelectrolyte. The effluents are tested before discharging them to

natural drainage system.

b) Samples of the discharged water are taken

and analyzed by agency approved by APCB on monthly basis.

Details of Air Quality Management a) Water spraying is done with water tankers

amounting at least 72KL/ day on all the haul roads, working faces, dump yards,

coal stocks.

b) Control blasting is done with NONEL (DTH- Down the Hole and TLD- Trunk

Line Delay) to minimise dust generation.

c) Allowing sufficient time for settlement of the coarser particle after blasting.

d) Blasting is done day time only.

e) Covering of Coal transported from the

stock in truck by tarpaulin before leaving the mine premise.

f) Restricting the speed limits of the dumpers

to 30 km/Hr to minimize the dust generation.

g) Restricting the loading of the dumpers

within the carrying capacity to arrest

spillage to prevent dust generation. h) Removing of accumulated dust in the haul

road by road grader after wetting the dust

by water sprinkling. i) Water sprinkling arrangement with pipe

line at coal dump area/loading point.

Monitoring of the air quality by agencies approved by PCB, Assam on monthly basis.

Waste Management

a) Quantity of overburden removal in 2015-16 8.50 Lakh cum.

b) Protective Measures taken for prevention of siltation, erosion and dust generator for waste

material:

Protective measures taken are:

i) Garland drains of 2100 meters are

provided. ii) 3 no. of toe wall/check dams are

constructed between sec. 3312300 to

3312000 with the boulders from the mine to prevent flow of soil mass.

iii) 20 no. of gully plugging are provided to

prevent soil erosion.

15 more no. gully plugging shall be constructed.

iv) Water spraying of 72KL /day is done on

working days to suppress dust on haul roads, working areas and in the coal stock

yard on regular basis with the help of water

tanker of capacity 9000 L .

c) Quantity of Waste material re-handled/back-filled: 6 Lakh cum (approx.)

9) PHOTOGRAPH:

MINE WORKING

COAL DUMP

NEW HAUL ROAD

HAUL ROAD GRADING

WORKING OF TOP OB BENCH

TOP SOIL WORKING

BACK FILLING

COAL TOP EXPOSING

CONTINUOUS WATER SPRAYING

HYDRAULIC EXCAVATOR WORKING

GRADING FACE UNDULATION

FACE WORKING

CONTINUOUS WATER SPRAYING

PLANTATION AT OB DUMP

PLANTATION AT OB DUMP

ABANDONED OB DUMP WITH PLANTATION OF LOCAL SHRUBS

PLANTATION AT OB DUMP

VIEW OF ABANDONED OB DUMP