The Singareni Collieries Company Limited
CONCEPTUAL REPORT OF KTK- 3 LONG WALL
1.0
LOCATION
KTK-3 Longwall Mine is envisaged for exploitation of part reserves of the
Bhoopalpalli Block-I & Bhoopalpalli Shaft Block-I in North Western part of
Mulug coal belt in the central part of the Godavari Valley Coal field, lying
between latitudes 180 26’ 26” to 180 28’ 25” and Longitudes 720 49’ 43” to 720
52’ 28”& latitudes 180 27’ 41” to 180 30’ 04” and Longitudes 790 48’ 39” to 790
57’ 55” covered in survey of India Topo sheet No.56 N/15.
2.0
COMMUNICATION
The proximity of Kakatiya group of working mines made the KTK-3 Longwall
mine well connected by an all weather asphalt road to the Warangal, the
district headquarters, is located about 68 km towards southwest of
Bhupalpalli. The Parkal - Mahadevpur PWD road is passing on the south
eastern side. The nearest railhead is Jammikunta on Kazipet - Balharsha
section of South Central railway, which is about 45-km southwest of
Bhupalpalli, as crow flies. The proposed KTK-3 Longwall Mine is at a
distance of 87 Km. from Ramagundam coal field, which is one of the
extensively developed mining areas of SCCL.
3.0
FEATURES WITHIN THE BLOCK AREA
PHYSIOGRAPHY
The area is plain to gently undulating sandy terrain, sloping towards NW.The
general topographical elevation of Bhoopalpalli area is 140 m- 220 m with
mean slope of 2.5 m/km.
4.0
LAND USE PATTERN
The KTK-3 Longwall Mine area is falls under Tadicherla reserve Forest and
part of revenue mandal of Bhoopalpalli. The Mine take area is 371.59Ha. Out
of which Forest land is 18.44 Ha and Non-Forest land is 353.15 Ha.
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5.0
MINE BOUNDARIES
The Boundaries of the KTK-3 Longwall mine are as follows:
6.0
North side
Dip side Block Boundary / 500m depth line of III seam
South side
Fault F1-F1
West side
Fault F12-F12
East side
Fault F13-F13
GEOLOGY AND STRUCTURE OF KTK – 3 INCLINE BLOCK
KTK-3 Longwall Mine is located in North Western part of Mulug Coal belt covering an
area of about 3.5 Sq.Km and it is carved out from the part of two blocks namely
Bhupalpalli Block –I and Bhupalpalli Shaft Block –I . It is a near rectangular block
with an average strike length of 1.5 Km and about 1.8 Km along the dip. The block is
mostly the Barakar formations and the exposures are very limited.
The bore hole density of the mine is 16 No/Sq.KM at Bhupalpalli Block –I area and
11.5 No/Sq.KM at Bhupalpalli shaft Block –I area and the overall bore hole density of
the mine comes around 13.75 No/Sq.KM.
Structure:
KTK-3 Longwall Mine is located in north central part of Mulug Coal belt covering an
area of about 3.5 Sq.Km. It is a near rectangular block with a strike length of 4.5 Km
and is having an average width of about 0.85 Km along the dip. The block is mostly
the Kamthi formations and Barren measures. These formations are covered by soil
and scanty exposures of above formations. The general trend of the bed in this block
varies from NNW-SSE with corresponding North-Easterly dip and gradient varying
from 1in 3.7 to 6.
Faults:
The KTK-3 Longwall Mine area is moderately disturbed which includes four
boundary faults and two faults delineated within the block area ranging in throw from
5m. to 350+ m.
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7.0
DESCRIPTION OF COAL SEAMS
At KTK-3 Longwall Mine area coal seams occur in the Barakar formation. Out of the
16 coal horizons encountered in this block, only twelve main coal horizons (IB, IA, IA
(TOP), IA (Bottom), I,II (TOP), II (Bottom), IIIB, IIIA, III, IVA,IV and V are persistent.
Out of these twelve coal horizons I, II (Bottom) , III & IV seams have attained
workable thickness of more than 1.5 m throughout the block and remaining seams
are inconsistent in thickness. Hence, the seams are not considered for extraction.
Thickness of Coal Seams
S.
No
Parting/Seam
1
Strata
I B Seam
Parting
2
I A (Top)Seam
Parting
3
I A(Bot) Seam
Parting
3
I Seam
Parting
4
II Seam (Top)
Parting
5
II Seam
(Bottom)
Parting
6
7
8
9
III B Seam
Parting
III A Seam
Parting
III Seam
Parting
IV A seam
Parting
10
IV Seam
Lithology
BARREN MEASURES
Grey white Sandstone and shale
Coal, alternating with shale bands
Grey white Sandstone
Coal, alternating with shale/clay
bands
Mainly sandstones with few shale
bands
Coal with bands
Mainly sandstones with few shale
bands
Coal with bands
Mainly sandstones with few shale
bands and coal bands.
Coal with occasional bands
Grey Sandstones, carbonaceous
sand stones with few thin shale
and coal bands
Thickness
(m)
Usual
thickness
(m)
0.30-1.65
8.52-14.35
0.54-1.36
0.60-3.20
0.64-3.00
24.64 – 35.70
1.30 - 4.15
2.85
10.90-23.34
0.13 -2.61
3.2
0.25 -9.05
Coal with occasional bands
1.52 – 4.80
Mainly sandstones with thin
carb.shale and carb.clay bands
Coal
Grey white Sandstone
Coal
Grey white Sandstone
Coal and shaly coal
Grey white sand stone
Coal
Grey white sand stone with
shale/coal bands
Coal
23.76 – 56.78
0.07 – 1.10
10.50 – 23.73
0.25 – 1.27
6.10-15.46
1.08 – 3.95
4.69 -37.54
0.40 -1.98
3.22
11.35 – 34.93
0.42 - 2.30
1.76
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7.1
Details of workable Coal Seams
Seam
Thickness
( m)
Seam
I Seam
usual
Thickness
( m)
1.30 - 4.15
Depth
(m)
Partition (m)
Min
Max
2.85
Min
Max
56.49
506.80
82.82
529.60
72.40
590.40
77.15
564.30
11.28 35.00
II Seam(Bot.) 1.52 – 4.80
3.20
40.68 98.34
III Seam
1.08 – 3.95
3.22
16.44 74.45
IV Seam
7.2
0.42 - 2.30
1.76
Seam Wise Coal Quality
The quality details of workable seams by Long wall Technology in KTK -3 INCLINE
are given below:
Sl.
No.
1
2
3
4
7.3
Seam
I seam
II (Bottom)
seam
III seam
IV seam
Moisture
(%)
3.70 – 6.10
3.01 – 6.13
3.50 – 6.96
3.70 – 7.14
Ash
(%)
27.50 – 50.20
26.77 – 44.62
13.36 – 34.98
10.33 – 36.65
1311G-4263D
Average
Grade
"E"
2068G-4644D
3300F-6416A
3078F-6489A
"E"
"C"
“C”
UHV (Kcal/Kg)
GEO-ENGINEERING DATA
Nature of Immediate Roof & Floor of Workable seams
Compressive
Usual
strength of roof
Seam
Thickness rock in Kg /sq
cm
I
2.85
109-320
Roof
Grey sst with Thin
clay/shale bands
(Very Good)
II
3.20
201-351
III
3.22
133-365
IV
1.76
179-300
Floor
Grey sst with thin
shale / clay bands
(Poor to Very
Good)
Carb
shale,shale,clays,sst
Fine to medium grained
micaceous sandstone
(Very Good)
(Fair to Very Good)
Grey white sst
Grey white sst
(Fair to Very Good)
(Fair to Very Good)
Grey white sst
Grey white sst
(Fair to Very Good)
(Fair to Very Good)
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8.0
RESERVES:
Details of Geological and extractable reserves of workable seams in KTK-3 :
Part reserves of Bhupalpalli block-I & Bhupalpalli shaft block-I considered for KTK-3
Longwall mine:
SEAM
BHPL BLOCK-I
GEOLOGICAL
AREA
RESERVES
(SQ.KM)
(MT)
BHPL SB SECTOR-4
RESERVES
(MT)
AREA
(SQ.KM)
TOTAL
Estimated
GEOLOGICAL EXTRACTABLE
RESERVES
RESERVES
(MT)
(MT)
I
5.04
1.4139
2.764
1.168
7.804
2.79
II (BOTTOM)
8.70
1.5916
2.953
1.215
11.653
2.98
III
8.45
1.9795
1.213
1.345
9.663
4.91
IV
1.58
1.7713
0.906
1.435
2.486
3.05
TOTAL
23.77
6.756
7.836
5.163
31.606
13.73
The extractable reserve in this Project through Longwall mining works out to
be around 13.73 Mt.
9.0
METHOD OF WORK
Longwall method is considered suitable for extraction of I, II (Bot.), III and IV seams
in this project due to the extent of property without faults except at the boundaries of
the block. However presence of undisturbed property planned for Longwall shall
further be confirmed by drilling additional number of exploratory boreholes towards
dip side. Three Road headers are provided for gate roads development. Three SDLs
would operate in conjunction with the RHs in gate road development for inter
connections and Main Trunks development.
9.1 Mode of entry
Initially, two tunnels are proposed from surface to No. III seam for coal transport,
conveyance for men, haulage and for ventilation. Further two additional Punch
entries are driven from the open excavation of KTK OCP Quarry towards north
boundary of quarry floor (dip side) through II seam.
9.2 Coal Transport
coal conveyance arrangement for II seam & I seam is made through belt conveyors
after making OB Ramp from surface to Punch entry floor . Three Inter seam tunnels
each are driven from II seam to I seam & III seam to IV seam to work in I seam and
IV seam. Coal from I seam is transferred to II seam trunk belt through inter seam
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tunnel and coal from IV seam is transferred to surface through III seam trunk belt
conveyor.
9.3 Ventilation
There are five entries in all for ventilation i.e. two inclines from surface to III seam as
intake air ways, Two Punch entries from KTK OC Quarry as Intake & return air ways
and one return air shaft driven from the KTK OCP II seam quarry floor to III seam
after completion of OC excavation.
10 PRODUCTION CAPACITY
The production capacity of the project will be about 1.50 Million tonnes per year. To
achieve this One Longwall unit along with three Road headers and 3 Nos of SDLs
are envisaged.
11 LIFE OF PROJECT
The life of the project will be around 11 years including construction period at a
production rate of 1.50 Mt per annum.
***