PRE-FEASIBILITY REPORT FOR NATRAJ UNDERGROUND COAL …€¦ · Natraj Underground Project (0.64...

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Job No.706147 Pre-Feasibilty Report, Page - 1

PRE-FEASIBILITY REPORT

FOR

NATRAJ UNDERGROUND COAL MINE PROJECT

PROPOSED CAPACITY – 0.64 MTY

1. INTRODUCTION

Natraj Underground Coal Mine Project is a part of Talcher Coalfield. Talcher

coalfield, located in river Brahmani valley to the north of Mahanadi river, constitutes

the south eastern member of lower Gondwana basin within Mahanadi valley group of

coalfields.

The coalfield spreads over 80km on the strike (east-west) and 26km on dip

rise (north-south) covering an area of about 1860 sq.km (coal bearing) of which about

201 sq.km has been explored in detail in the southern part of the coalfield. In the

northern part, an area of about 53 sq.km. has also been explored in detail. Major

portion of coalfield is situated in the district of Angul of Orissa, whereas part areas of

the coalfield spread over to Dhenkanal, Deogarh and Sambalpur districts.

Natraj Underground Project (0.64 Mty) is a proposed coal mining project.

296.47 Ha land is required for this project which has already been acquired under

Coal Bearing Area (Acquisition & Development) Act, 1957 vide Gazette Notification

No. S.O. 3687 Dt.29/11/1962. The high quality coal (B&D grade) produced through

eco-friendly fully mechanized underground mining method will be used for blending

with high ash coal of opencast mines of Talcher Coalfield for long distance power

plants so that overall ash % is less than 35%.

Continuous miner with shuttle car and side discharge loader (SDL) has been

envisaged for extraction of coal.

2. STATUS OF NATRAJ UNDERGROUND COAL MINE PROJECT

Coal Mine not yet started.

STATUS OF ENVIRONMENT CLEARANCE

EC granted vide J-11015/306/2005-IA.II (M) dated 14.07.2006 under

provisions of EIA notification, 1994.

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STATUS OF FOREST CLEARANCE

Forest clearance was obtained for forest land 289.856 Ha vide letter no. 8-

73/2004 - FC dated 30-06-2009 Government of India, MoEF- FC Division.

3. NEED / JUSTIFICATION FOR THE PROJECT

The Natraj UG mine (0.64 Mty) obtained the environmental clearance under

the provision of EIA Notification, 1994 and subsequent amendments. Now as per

Gazette notification S.O 1530(E) on dated 06/04/2018, the projects obtained their

environment clearances under EIA notification, 1994 are required to obtain

environmental clearances under EIA notification, 2006. So the Form I and Brief Note

is prepared for the Revalidation of EC under EIA notification, 2006.

Further, as Nandira U/G extended its lease area to the adjoining lease hold

area of Natraj, the area of Natraj reduced from 386.68 Ha to 296.47 Ha for which

amendment in EC is required.

Public Hearing (PH) already held for the entire mine lease area (i.e.

483.227) hence the PH may be exempted for this proposal of reduction in lease area

(i.e. 296.47 Ha).

4. OBJECTIVES OF THE PROJECT:

To supply coal for blending with high ash coal of opencast mines of

Talcher coalfield for long distance power plants.

To create conditions for growth of other ancillary industries in the region.

5. LOCATION AND COMMUNICATION

LOCATION

The project under study is located in the south-central part of Talcher

Coalfield under Talcher Area of MCL.

Coalfield Talcher

Area Talcher

District Angul

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Latitudes 20o55’09” & 20o56’20” N

Longitudes 85o04’38” & 85o06’12” E

Topo Sheet No. F45 T1

COMMUNICATION

Sl.No. Item Particulars

1. Nearest town Town: Talcher, Distance - 12 Km District: Angul, distance - 25 km

2. Nearest road Talcher-Gopalprasad road passes through the north-eastern part of the block.

3. National highways Cuttack-Sambalpur National highway No.55 is located to the south of the block and approachable at a distance of about 17 km.

4. Connection to the state capital

167 km to Bhubaneswar via NH-55 & NH-5.

5. Connection to the company HQs

195 km to Sambalpur via NH-55 & NH-6.

6. Nearest railhead Talcher railway station on branch line of East Coast Railway is at a distance of about 12 km.

7. Airport Biju Pattanaik Airport in Bhubaneswar is at a distance of about 172 km.

6. TOPOGRAPHY, DRAINAGE AND CLIMATE

The project area is gently undulating landscape with a few low ridges in the

south-eastern part of the block. The general slope is gentle and towards north.

Lowest and highest elevations of the area are 118.92 m and 170.81 m respectively

above MSL.

The Brahmani river on the eastern extremity of the coalfield mainly controls

drainage in the area. There is one seasonal nullah, Bangaru jhara that flows in the

north side of the block and drains into the Brahmani river at the north of Talcher town.

There are also some more seasonal nullahs traversing the block.

The project area experience a tropical climate with average annual rainfall

of 1270 mm and mean minimum daily temperature of 6.70C and mean maximum

daily temperature of 45.50C . Mean wind speed ranges from 1 km/hr to 8 km/hr.

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7. GEOLOGY

Structural interpretation of the block is mainly based on subsurface data

because the entire area is either covered with thick soil or by laterite and Barakar

boulders. General strike of the bed is east-west with northerly dip. Local variation in

dip and strike is very common.

General direction of the dip is towards north with local swings. The amount of

dip varies from 2o-3o in the western part, 6o-7o in the central part and 4o-5o in the

north eastern corner of the block.

In all nine (9) faults have been deciphered in Natraj block. All these faults

except F8-F8 have already been proved in the adjoining Nandira block. Faults F6,

F8 and F9 have been intersected in the boreholes NTR-23, 24 and 6 respectively, the

remaining faults have been deciphered mainly on the basis of difference in the floor

levels.

Sequence of Coal Seams and Intervening Parting

Formation Lithology Thickness range (m)

Recent & sub-recent

Alluvial soil 0.50 (NTR-27) 4.00 (NT-4)

Laterite 0.50 (NTR-16) 5.50 (NTR-28)

U Barakar L

Sandstone, shales and coal seams

8.00 (NTR-22) 69.50 (NTR-24)

Pebbles & boulders 1.50 (NTR-28) 29.70 (NTR-29)

KARHAR BARI

Sandstone 48.16 (NT-13) 132.61 (NT-16)

Seam-I T (combined) 2.34 (NTR-34) 8.51 (NTR-58)

Seam-I T2 0.07 (NT-2) 3.90 (NTR-30)

Sandstone/Sandy shale 0.70 (NTR-7) 7.50 (NT-18)

Seam-I T1 0.12 (NTR-11, NT-15)

4.02 (NTR-44)

Sandstone/Sandy shale 2.01 (NTR-29) 16.04 (NTR-16)

[w.r.t Seam-I T (comb.)]

0.56 (NTR-44) 18.77 (TCH-7)

(W.R.T Seam-I T1)

Seam-I Middle 0.05 (NTR-27) 3.88 (NTR-15)

Sandstone/Sandy shale 0.70 (NTR-22) 8.76 (TLR-154)

Seam-I Bottom 0.05 (NTR-32) 3.30 (NT-12)

Talchir Greenish Sandstone/shale 78.72 (NTR-20)

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Note: 1. Metamorphic are neither exposed anywhere within the block nor any

borehole was drilled deep enough to intersect them.

2. Talchir has not been exposed within the block. No borehole was drilled

to intersect full thickness of Talchir except NTR-20 in which only part

thickness (78.72m) of Talchir formation has been intersected.

3. West central and north central part of the block is covered under thick

soil (0.50m to 4.00m) and rest of the block is capped by laterite and

Barakar boulders (0.50m to 5.50m thick).

4. The thickness of weathered mantle/zone comprising soil/alluvium and

weathered rocks ranges from 1.00m (NTR-53) to 37.85 m (NT-14).

8. MINE BOUNDARIES

The limits of the mining block are as follows :

North : Fault F6-F6.

East : Nandira U/G mine forms the eastern limit of the project.

West : Western limit is kept at about 2 km from main inclines to avoid

excessive load.

South : Fault F1-F1 & F2-F2.

9. MINING TECHNOLOGY

Presence of number of faults in the property suggests in favour of some mining

method with greater flexibility than longwall.

Keeping the above factors in view, the continuous miner and shuttle car

combination have been proposed in top section.

The winning of coal from bottom section will be done by SDLs in conjunction with

solid blasting. The muck generated will be loaded onto chain conveyors by SDLs

directly for onward transportation.

10. MINE CLOSING OPERATION

Natraj U.G will be closed after exhaustion of coal reserve. The total

extractable coal is 6.60 Mt. The life assessed was 16 years including construction

period.

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11. TARGETED OUTPUT, LIFE, RESERVE, PRODUCTION AND DUMPING

SCHEDULE

The proposed project has been planned for a production capacity of 0.64 Mt

per annum.

The project will sustain a mine life for a period of 16 years of mining

operations as on 01/09/18.

Coal is to be mined at the rate 0.64 MTY out of the available coal reserves

of 6.60 Million Tones (as on 01/09/18).

Year Coal in Mty

IV Year 0.26

V Year 0.48

VI Year 0.64

VII Year 0.64

VIII Year 0.64

IX Year 0.64

X Year 0.64

XI Year 0.64

XII Year 0.64

XIV Year 0.64

XV Year 0.64

XVI Year 0.10

Total 6.60

14. LAND REQUIREMENT

a. Details of land are given below. (Area in Ha)

Sl. No. Particulars Existing 0.64 Mty

1. Forest 217.19

2. Non-forest 79.28

Mining lease area 296.47

3. Residential colony 8.043

Total land 304.513

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b. Break-up of land involved : (Area in Ha)

Pre-Mining:

*

T

h

e

r

e

was some mistake in arithmetic calculation in non-forest land for which the

actual land was reduced from 483.227 to 386.68 Ha

Pre-Mining:

S.No. LAND USE Actual Land

Transferred to Nandira U/G

Total in Ha

1 Agricultural land 70.53 17.58 52.95

2 Forest land 289.82 72.63 217.19

3 Waste land/Govt. land

18.33 -- 18.33

4 Grazing land - -- -

5 Surface water bodies

-- -- --

6 Settlements 8 -- 8

7 Others (specify) - -- -

Total Mine Lease 386.68 90.21 296.47

As per EMP

Actual Land After Correction

Transferred to Nandira U/G

Total

Forest 289.856 289.82 72.63 217.19

Non-Forest 193.371 *96.86 17.58 79.28

Total 483.227 386.68 90.21 296.47

Surface Infrastructure (outside mine lease area)

8.043 8.043 0.00 0.00

Total 491.27 394.723 90.21 296.47

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Post Mining Land Use:

Post- Mining Land Use

Sl.

No. Item/Purpose Land requirement (in Ha)

Plantation

(Green

belt)

Undisturbed

forest Land

Built

up

area

Undisturbed

other land Total

1. Mine Surface 217.19 76.05 293.24

2.

Surface

Infrastructure

(within ML area)

0.65 --- 2.58 --- 3.23

A. ML Area (1+2) 0.65 217.19 2.58 76.05 296.47

B. Surface infrastructure (Outside ML area) (Existing and future colony)

1.61 --- 6.433 --- 8.043

Total Land

Requirement (A+B) 2.26 217.19 9.013 76.05 304.513

15. WATER DEMAND AND SUPPLY ARRANGEMENT

The water supply arrangement basically includes potable and industrial

water demand of the project.

(Fig. In KLD)

Existing (0.64 Mty)

Potable 50

Industrial 110

Total 160

Potable water will be drawn from Integrated Water Supply Scheme of Talcher

Coalfield with intake point at the Brahmani River.

Industrial water demand will be met from mine water.

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16. PUMPING AND DRAINAGE

The project lies adjacent to existing Nandira U/G mines (0.33 Mty), on the

western side. The topography of the area is fairly undulating with seasonal streams

here & there. In general there is gentle slope from south to north. The water pumped

out from the mine shall be connected to existing drainage system of the Nandira U/G

mine.

17. MINED OUT LAND & PROPOSED FINAL LAND USE

The land-use due to underground mining is disturbed mainly due to

construction of the surface facilities, e.g., shaft complexes, incline complexes, coal

handling plants, coal washeries, roads, railway sidings, etc. and also due to damage

to the land due to subsidence.

Subsidence prediction study will be carried out for this project. So there will

be no safety and fire hazards for the neighboring community after the mine closure.

Using the predicted subsidence movement, the impacts on the surface properties

and the surface drainage system will be determined. Also, possibilities of the

development of the cracks and their likely width will be predicted.

Capping of the shaft and incline or any other opening of the mine will be

effectively sealed so that illegal mining from these openings and safety hazards due

to fire and water, are prevented in the abandoned mine.

If the infrastructure is dismantled and the land is restored to some useful

purpose, the alternate land-use will be decided considering the conditions prevailing

during the period 5 years in advance of the closure of the mine.

18. MANPOWER

Proposed manpower is 715.

Sl. No. Particulars Strength

1 Executives 40

2 Monthly rated 98

3 Daily rated 577

Total : 715

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19. POWER SUPPLY

The annual energy requirement for the project is 12.49 MkWh.

The power supply to the project will come from 132/33 kV Central Sub-station

of MCL at Nandira.

20. COAL HANDLING & DESPATCH ARRANGEMENT

Besides the local demand, coal from this coalfield are being transported

by rail route or coastal Shipping via Paradip port to costal power stations of southern

India.

(a) Basic Parameters

(i) Target output of the mine : 0.64 MTPA

(ii) Life of the mine (excluding : 16 years

construction period)

(iii) Mine operation (production) : 3 shifts/day

(iv) CHP operation : 3 shifts/day

(v) Quality of coal : Grade C to D long flame

(vi) Product size : (-) 75 mm

(vii) Customer : Sponge Iron Plants/ Local industry &

basket linkage.

(viii) No. of overhead bunkers : 2x300t

& capacity

(b) Washing

Washing of coal is not proposed in approved project.

21. INFRASTRUCTURE DETAILS

CHP

The targeted production of the mine is 0.64 Mty. Coal brought from U/G mine

shall be handled separately for top and bottom sections. In addition to the above,

provision for ground stacking has also been made by feeding the coal directly from

the shuttle conveyor onto a belt conveyor. Coal shall be taken for blending to sites in

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opencast mines, if required. Final dispatch arrangements from CHP shall be decided

by MCL based on the linkage pattern.

WORKSHOP

The existing Nandira U/G mine has a full-fledged unit workshop and it is

envisaged that all the existing facilities shall be extended to Natraj U/G mine also.

RAILWAY SIDINGS

Coal shall be taken for blending to sites in opencast mines, if required. Final

dispatch arrangements from CHP shall be decided by MCL based on the linkage

pattern.

22. ENVIRONMENTAL MONITORING

Routine Environment monitoring will be done for the project. For air, water

and noise pollution control measures, the samples will be collected and tested round

the year with appropriate frequency at strategic places.

23. SUBSIDENCE MANAGEMENT

Attempt has been made to minimize the land requirement for the project. The

cracks are likely to be formed in the tension zones, which require plugging by dozing.

However, because of sub-soil thickness of 2 to 2.5 m, proper drainage will be

maintained. This will minimize the water accumulation in the depressed zone also.

Because of strain development near the panel barrier, the trees may be uprooted.

This requires strengthening of tree cover for which provision will be made in the

revenue cost of the project.

Cracks formed and reaching to the surface, shall be plugged as per standard

procedure.

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24. SAFETY AND SECURITY ARRANGEMENT

The inclines & shafts will be effectively sealed so that illegal mining from

these openings and safety hazards due to fire and water, are prevented in the

abandoned mine. The area around the mine shall be fenced and shall be guarded.

The land which may be damaged due to subsidence after depillaring, if any,

will be properly restored with adoption of sound subsidence management. The land

which will be subsided, will be restored by filling up soils/sands with proper leveling

and grading. The land on the surface may be affected slightly due to subsidence after

depillaring. Measures will be taken to strengthen this land. The damage if any will be

made up by filing the cracks properly and then by fresh plantation.

Adequate provision will be made for lighting the installations near strategic

places by 2x250W HPSV lamps.

25. REHABILITATION AND RESETTLEMENT

No village habitation is located on the surface of this mine. So resettlement

and rehabilitation for displaced families are not necessary. However, the land loser

families will be given suitable compensation.

PRE-FEASIBILITY REPORT FOR NATRAJ UNDERGROUND COAL …€¦ · Natraj Underground Project (0.64...

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