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West Elk Mine <br />Recover <br />Table 29 <br />Rat'es'for Room and Pillar and t6n wall MWng Methods . <br />Continuous Miner <br />Diesel S�,,utdc Car <br />Feeder Breaker <br />Room and Pillar Method <br />Section Conveyor Belt <br />Trans ort Coal To Main Belt <br />Location <br />Coal Recover <br />Main Development <br />30-40% <br />Submain Development <br />30-40% <br />Panel Mining <br />Partial Pillar Extraction <br />45 -55% <br />Full Pillar Extraction <br />60-90% <br />Total <br />50% <br />Lon wall Method <br />Location <br />Coal Recover <br />Main Development <br />30-40% <br />Submain Development <br />30-40% <br />Panels <br />80-90% <br />Total <br />80% <br />Mining Equipment <br />Mining equipment in use at West Elk Mine varies. Typical cquipinciit used in the development <br />mining operations is shown on Table 30. Typical equipment used in.the longwall mining <br />operations is shown on Table 31. <br />Use and Conservation of the Coal Resource <br />The urine plan has been laid out to recover as much coal as practical, considering prudent mining <br />practices and economic viability of the operation. Longwall technology is utilized at West Elk <br />Mine to achieve the maximum economic recovery of the coal reserves, enhance personnel safety, <br />and protect surface resources. Although this method attains the highest overall reserve recovery, <br />not all coal will be recovered. <br />Although laic,.recovery rates will be Llchievedwith long; va.11 ttchlnology in the E and B' Suan-is, <br />some coal will remain unmined. Because of the specific block pattern needed for longwall panel <br />development, small areas of marginally thick E and B Seam coal will not be mined. These areas <br />CaI1T1L'fL1aL!:' a li)fit :—, eServe area. <br />Where E and B Seam mining will, occur, some top coal, from one to two feet in thickness, will be <br />left unmined in the roof to improve roof conditions and hence, personnel safety and product <br />quality. Because the full seam thickness commonly exceeds the maximum extraction height of <br />the mining equipment, some floor coal will also be left unmined. <br />Equipment <br />Principal Use <br />Continuous Miner <br />Diesel S�,,utdc Car <br />Feeder Breaker <br />Cuttinb Coal <br />Transport Coal To Feeder <br />Break Coal/Meter Flow To Belt <br />Section Conveyor Belt <br />Trans ort Coal To Main Belt <br />Main Conveyor Belt <br />Trans ort Coal To Surface <br />Roof Bolter <br />Primary/secondary Roof.Support <br />Power Center <br />Provide Electrical Power <br />2.05-5 .Rev. II/04-PRI1; 03/06 -PRIG; 07/15- MR413 <br />