Presentation on theme: "New Technology and Challenges for Underground Coal Mining"— Presentation transcript:
1 New Technology and Challenges for Underground Coal Mining सी एम पी डी आईएक मिनि रत्न कंपनीCmpdi (A Miniratna company)New Technology and Challenges for Underground Coal MiningB.N. BasuDirector (CRD)CMPDI
2 Coal Production from underground Coal Mines Coal mining is carried out bySurface or ‘opencast’ miningUnderground or ‘deep’ miningAround 60% world coal production comes from underground miningIndia emerged as the largest coal producer in the world after China and USA, producing about 9% of the total global productionFrom U/G China USA and India produce about 95%, 33% & 10% respectively
3 Trend Coal Production from CIL mines (1974-75 to 2011-12)
4 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.
5 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 technologyRoadheader (LW Dev.)PSLWShortwall (in B&P)Highwall MiningContinuous MinerConventional B&P (& Others)
6 Application of Mass production Technologies Continuous Miner Technology (Bord/Room & Pillar)Powered Support Longwall Technology
7 Continuous Miner technology presently in operation in CIL mines Jhanjra, ECL – Joy Continuous MinerSarpi, SECL – Joy Continuous MinerTandsi, WCL - Joy Continuous MinerKumberkhani, WCL- Sandvik LCCMNCPH, Chirimiri, SECL- Joy Continuous MinerSheetaldhara-Kurja, SECL- Bucyrus Continuous MinerPinoura, SECL- Bucyrus Continuous MinerRani Atari- Sandvik LCCM
8 Continuous Miner technology proposed in CIL mines Jhanjhra, ECL- MOU has been signedTilaboni, ECL - Under tenderingKottadih, ECL- Under tenderingBlock-II, BCCL- LOA has been issuedLohapatti, BCCL- Bids under scrutinySaoner-I,WCL- Under re-tenderingChurcha, SECL- LOA has been issued for two sets
11 Proposed Power Support Longwall Technology (PSLW) in CIL mines Jhanjhra, ECL- Agreement has been signedMoonidih seam XVI, BCCL- Bids under scrutinyMoonidih seam XV, BCCL- LOA has been issuedMuraidih, BCCL- Agreement has been signed with L1Kapuria, BCCL- LOA has been issued
15 Challenges of Underground Mining in CIL mines UG operations at shallow depth has given way to quarry or surface miningClosure of number of underground mines due to exhaustion of coal reserve or lossesReduction or stagnation in production due to attrition of workforce or natural retirementReduced production and productivity due to old, long & arduous minesLow technological, R&D or skill-development input in underground minesA number of underground mining operations or processes involve human effort or drudgeryLow productivity of manpowerGeological disposition and exploration of coal seams has also affected indirectly
16 Other Constrains and challenges in U/G Mines Size of the Mine / blockGeological Complexities and ExplorationMine Approach & Development : high gestation periodTechnological Development & ImplementationAbsorption of Technology – Skill developmentStrata Management & ControlMechanization – Productivity Enhancement NeedsEquipment Supply & Maintenance – Vendor DevelopmentLong & Arduous Travel / tramming routes – Man-riding / Material SupplyMining hazardsTechnological Gap – Focus on Specific R&D
17 Renewed Focus on Underground Mining Aiming from 10% to 30% coal production by 2030Introduction of Mass-production Technology in large scaleSharing of specific technology with other countriesFocusing on Specific R&D projects
18 Alternative Underground Coal Mining Technologies Underground Coal GasificationCoal bed Methane
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