UNDERGROUND MINING, SORTING, AND FILLING COORDINATED MINING METHOD FOR CLOSE-RANGE COAL SEAM CLUSTER

摘要

An underground mining, sorting, and filling coordinated mining method for a close-range coal seam cluster; performing fully mechanised mining on a close-range coal seam cluster and, on the basis of the gangue throughput during the production process, designing an underground coal gangue sorting system and filling workface (9); transporting the gangue produced during the mining process to an underground coal gangue sorting chamber (4), and transporting the sorted gangue to the filling workface (9) for filling and mining; and, after downhole washing, transferring the gangue produced by the filling workface (9) back to the filling workface for backfilling. The present method achieves zero discharge of gangue in integrated coal gangue mining in close-range coal seams, eliminating the adverse impact of ground surface gangue dumps on the environment, increasing the clean coal lifting rate, and releasing the main lifting pressure; in addition, nearby sorting and selective filling greatly alleviate the damage and disturbance of subterranean rock mass caused by traditional mining methods.