New Technology and Challenges for Underground Coal Mining B.N. Basu Director (CRD) CMPDI सी...
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Transcript of New Technology and Challenges for Underground Coal Mining B.N. Basu Director (CRD) CMPDI सी...
New Technology and Challenges for Underground Coal Mining
B.N. BasuDirector (CRD)
CMPDI
सी� एम पी� डी� आई एक मिमनि� रत्� क� पी��Cmpdi (A Miniratna company)
Coal Production from underground Coal Mines
Coal mining is carried out by Surface or ‘opencast’ mining Underground or ‘deep’ mining
Around 60% world coal production comes from underground mining
India emerged as the largest coal producer in the world after China and USA, producing about 9% of the total global production
From U/G China USA and India produce about 95%, 33% & 10% respectively
Trend Coal Production from CIL mines (1974-75 to 2011-12)
0.00
50.00
100.00
150.00
200.00
250.00
300.00
350.00
400.00
450.00
500.00
Year
Co
al P
rod
uct
ion
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
TOTAL OC Mines UG Mines
Different Mining Methods used in CIL UG mines
Conventional Bord & Pillar (B&P) system with manual loading of coal onto tubs.
Semi-mechanised B&P system with loading by Side Discharge Loaders (SDLs) or Load Haul Dumpers (LHDs) or mechanised drilling by Universal Drilling Machines (UDMs).
Mechanised Bord & Pillar/ Room & Pillar system with Continuous Miners (CMs).
Mechanised Powered Support Longwall (PSLW) mining system.
Methods with hydraulic stowing technology in conjunction with sand or alternative filling.
Special methods (i.e. site specific methods), like Blasting Gallery (BG) method, Cable bolting method, wide-stall method, steep mining methods, etc.
Technology-wise Underground Coal Production in CIL (2011-12)
32.31, 85%
3.54, 9%
1.79, 5%0.32, 1%
0.18, 0%
0.1, 0%
0.15, 0%
B&P Intermediate technology Roadheader (LW Dev.) PSLW Shortwall (in B&P)
Highwall Mining Continuous Miner Conventional B&P (& Others)
Application of Mass production Technologies
Continuous Miner Technology (Bord/Room & Pillar)
Powered Support Longwall Technology
Continuous Miner technology presently in operation in CIL mines
Jhanjra, ECL – Joy Continuous Miner Sarpi, SECL – Joy Continuous Miner Tandsi, WCL - Joy Continuous Miner Kumberkhani, WCL- Sandvik LCCM NCPH, Chirimiri, SECL- Joy Continuous Miner Sheetaldhara-Kurja, SECL- Bucyrus Continuous
Miner Pinoura, SECL- Bucyrus Continuous Miner Rani Atari- Sandvik LCCM
Continuous Miner technology proposed in CIL mines
Jhanjhra, ECL- MOU has been signed Tilaboni, ECL - Under tendering Kottadih, ECL- Under tendering Block-II, BCCL- LOA has been issued Lohapatti, BCCL- Bids under scrutiny Saoner-I,WCL- Under re-tendering Churcha, SECL- LOA has been issued for two sets
Continuous Miner
Shuttle Car & Quad Bolter
Proposed Power Support Longwall Technology (PSLW) in CIL mines
Jhanjhra, ECL- Agreement has been signed Moonidih seam XVI, BCCL- Bids under scrutiny Moonidih seam XV, BCCL- LOA has been
issued Muraidih, BCCL- Agreement has been signed
with L1 Kapuria, BCCL- LOA has been issued
Shearer working at Longwall face
Shearer Drum
Powered Roof Supports (Two Legged)
Challenges of Underground Mining in CIL mines
UG operations at shallow depth has given way to quarry or surface mining
Closure of number of underground mines due to exhaustion of coal reserve or losses
Reduction or stagnation in production due to attrition of workforce or natural retirement
Reduced production and productivity due to old, long & arduous mines Low technological, R&D or skill-development input in underground
mines A number of underground mining operations or processes involve
human effort or drudgery Low productivity of manpower Geological disposition and exploration of coal seams has also affected
indirectly
Other Constrains and challenges in U/G Mines
Size of the Mine / block Geological Complexities and Exploration Mine Approach & Development : high gestation period Technological Development & Implementation Absorption of Technology – Skill development Strata Management & Control Mechanization – Productivity Enhancement Needs Equipment Supply & Maintenance – Vendor Development Long & Arduous Travel / tramming routes – Man-riding /
Material Supply Mining hazards Technological Gap – Focus on Specific R&D
Renewed Focus on Underground Mining
Aiming from 10% to 30% coal production by 2030 Introduction of Mass-production Technology in
large scale Sharing of specific technology with other
countries Focusing on Specific R&D projects
Alternative Underground Coal Mining Technologies
Underground Coal Gasification Coal bed Methane