UNFC COAL MINES CASE STUDIES

UNFC COAL MINES CASE STUDIES

Format for Collecting Information Block Geological Reserve in the block Geological Reserve Considered Extractable Reserve Balance Extractable Reserve Econ /Not Econ F1 F2 G1 G2 G3 Total G1 G2 G3 Total G1 G2 G3 Total G1 G2 G1 G2

Project Report contains: Introduction Project Site Information Mine Boundary, Reserves & Mine Life Mining Strategy Mining Schedule Ventilation CHP & Surface Dispatch Arrangement Power Supply, Illumination & Communication Manpower, Productivity & Training Mine Closure Planning Financial Evaluation Marketability & Justification Geology and Deposit Appraisal Mine Entries Method of Mining / Mining System & Equipment Horizontal & Vertical Transport Water Management, Pumping & Drainage Workshop, Stores & Magazine Civil Construction Safety and Conservation Environment Management Land Requirement, R&R Package and Project Implementation Schedule

Case-1: Jagannath Underground (UG) (Mahanadi Coalfields Ltd)

Salient Features Name of the Project Jagannath UG Project Geological Block Jagannath UG Block Area (Sq. km) 4.5 Borehole Density (per sq. km) Seams occurring in the block 20 (Index Seam) 12 (Seam I Top) 9 (seam I Bottom) Index (local occurrence), Seam I (split into top, middle & bottom) Total Geological Reserve 80.62 Mt (Index + Seam I)

Sl. No FAULTS Fault Trend Direction of throw 1 F1-F1 NW-SE to E-W Amount of throw (m) Northerly 40-85 2 F2-F2 NE-SW Northwesterly 10-35 3 F3-F3 NW-SE to E-W 4 F4-F4 E-W to NW-SE 5 F5-F5 E-W to NW-SE Southerly 5-35 Southerly 10-75 Southerly 90-125 6 F6-F6 E-W Southerly 7-15

COAL SEAMS CONSIDERED Sl. No. Particulars Thickness range (m) From 1 Index Seam 0.50 3.33 Parting 3.05 17.68 2 Seam I (Top) 1.20 6.34 Parting 0.46 6.81 3.A Seam I (Middle + Bottom) To 6.79 13.99 3.B Seam I (Middle) 2.98 6.65 Parting 1.00 5.02 4 Seam I (Bottom) 3.53 7.78

NET GEOLOGICAL RESERVE (PROVED) Coal Seam Total (Mt) Index 4.91 Seam-I (Top) 20.17 Seam-I (Middle + Bottom) 55.54 Total 80.62

SECTOR-WISE NET GEOLOGICAL RESERVE Sector Reserve Workable / Not Workable A 1.66 Not Workable B 36.34 Workable C 14.30 Workable D 8.93 Workable E 11.18 Workable F 5.60 Workable G 2.61 Not Workable Total 80.62

Seam-wise Mining Area Seam Area (sq.km) Index 1.3 Seam I (Top) 4.5 Seam I (Bot) 4.5

GEO-MINING CHARACTERISTICS Items Seam Index I (Top) I (Mid+Bott) Thickness range (m) 0.50-3.33 1.2-6.34 6.79-13.99 Workable thickness range (m) 1.5-2.0 1.5-4.6 1.7-4.6 Avg. thickness (m) 1.83 3.10 3.59 Avg. grade of coal D C B Immediate roof Sandstone and Shale Avg. seam gradient 1 in 9

Plans / Drawings Jagannath UG Index Seam Seam I (Top) Seam I (M+B)

MINE ENTRY Incline Name Gradient Length / Depth (m) Crosssectional Area (m 2 ) Incline 1 1 in 4.5 560 5.0 x 3.0 Haulage, intake Purpose Upto seam Seam-I (Mid+Bot) Incline 2 1 in 4.5 560 5.0 x 3.0 Belt, intake Seam-I (Mid+Bot) Airshaft Vertical 180 5.0m dia Return Seam-I (Mid+Bot) Airshaft Vertical 140 5m dia Intake Seam-I (Mid+Bot)

UG PANEL PARAMETERS No. of Headings in each Panel 5 Width of Galleries 5.0m Pillar Size 35m x 35m

PRODUCTION CM Set Cutting Thickness Range Production Rate (Tonnes Per Day) CM 1 2.4m 4.6m 1600 CM 2 2.4m 4.6m 1600 CM 3 1.5m 3.8m 1200

EXTRACTABLE RESERVE Seam Extractable Reserve (Mt) Index 1.75 Seam I Top 8.99 Seam I M/B 10.81 Total 21.55 Mine Life : 22 Yrs

Reserves Total Proved Geological Reserve 80.62 Mt Geological Reserve Considered for Mining 76.35 Mt Extractable Reserve 21.55 Mt

UNFC Classification G1 G2 G3 Total g. reserve G. Reserve considered Ex. Reserve Balance Ex. Reserve Eco. Status 80.62 0.00 0.00 80.62 76.35 21.55 21.55 Eco RESOURCE RESERVE 3,3,3 3,3,2 3,3,1 2,2,2 2,2,1 2,1,1 1,2,2 1,2,1 1,1,2 1,1,1 0.00 0.00 4.27 0.00 54.80 0.00 0.00 0.00 0.00 21.55

Case-2 MAHATADIH RAIDIH BLOCK Raniganj Coalfield

SALIENT FEATURES SEAM - Begunia TOTAL AREA - 2.36 Sq. km MINING AREA - 1.17 Sq. km DEPTH - 330 TO 550m MINING THICKNESS - 2.50 TO 3.05m GRADIENT - 1 in 6 (small part) to 1 in 8/9 (major part) GASSINESS - Degree III GRADE - S-I to W-II (Avg. S-II) Medium Coking

RESERVE (ISP) PARTICULARS RESERVE (MT) Proved Reserve 4.17 Indicated Reserve 2.79 Total Geological Reserve 6.96 Reserve within mining area 4.95 Extractable Reserve 2.51

Project Plan of Begunia Seam

UNFC Classification G1 G2 G3 Total g. reserve G. Reserve considered Ex. Reserve Balance Ex. Reserve Eco. Status 4.17 2.79 0.00 6.96 G1-4.17 G2 0.78 Total 4.95 G1 2.23 G2 0.28 Total 2.51 G1 2.23 G2 0.28 Total 2.51 Eco RESOURCE RESERVE 3,3,3 3,3,2 3,3,1 2,2,2 2,2,1 2,1,1 0.00 2.01 0.00 0.50 1.94 0.00 1,2, 2 0.00 1,2,1 1,1,2 1,1,1 0.00 0.28 2.23

Method of Mining and Rate of Production METHOD OF MINING BORD AND PILLAR, COAL LOADING WITH LHD / SDL UDM FOR FACE DRILLING AND ROOF BOLTING PILLAR EXTRACTION WITH HYDRAULIC SAND STOWING (Gassiness - Degree III) PRODUCTION RATE 2 LHD DIST : 800 TPD (3 LHD per panel) 1 SDL DIST : 200 TPD (2 SDL main dip) TOTAL : 1000 TPD

PRODUCTION PHASING Year 1 st 3 rd 4th 5th 6th 7th 8-13 th Prod (Mty) -- 0.03 0.06 0.18 0.30 0.30 PRODUCTION CAPACITY : 0.3 MTY MINE LIFE : 13 YEARS (including gestation period)

Case-3 Deoghar Block Rajmahal Coalfield

SALIENT FEATURES Geological Block - Deoghar Block Total Area - 10.63 Sq. km Borehole Density - 15 per Sq. km Seam Occurrence - Seam XII to Seam I Mining Area - 4.01 Sq. km Seams Proposed to be Worked - Seam X to Seam II Bottom Extent of the Mining Area - (730-4000m) / (800-4400m) Production Capacity - 3.0 Mty

RESERVE (ISP) PARTICULARS RESERVE (MT) Proved Reserve 432.88 Indicated Reserve 0.00 Total Geological Reserve 0.00 Reserve within mining area 100.00 Extractable Reserve 90.04

Open cast Mine Limit Plan showing Coal Reserve/Resource

Block: Deoghar (Hura C ) G1 G2 G3 Total g. reserve G. Reserve considered Ex. Reserve Balance Ex. Reserve Eco. Status 432.88 0.00 0.00 432.88 100.00 90.04 90.04 Eco RESOURCE RESERVE 3,3,3 3,3,2 3,3,1 2,2,2 2,2,1 2,1,1 1,2,2 1,2,1 1,1,2 1,1,1 0.00 0.00 332.88 0.00 9.96 0.00 0.00 0.00 0.00 90.04

Mine Parameters Total Extractable Reserve - 90.73 Mt Total Overburden - 228.79 Mm 3 Avg. Stripping Ratio - 2.52 m 3 / Tonne Surface Constraints - 2 nallas flowing north to south Overall Grade - F G HEMM - Diesel Hydraulic Shovel / Backhoe Electric Shovel, Surface Miner, Front End Loader, Dumper (100Te, 60Te), Dozer with Ripper, Drills IRR (85% Utilization) - 12.14% (Departmental Operations) 17.48% (Outsourced Operations)

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