The invention discloses an efficient filling mining method for an extra-thick
coal seam. The method comprises the following steps that mining and filling key technical parameters are determined; a roadway and a mining and filling production
system are arranged; a mining and filling connection sequence is determined, milling type
coal mining is carried out, a long "ship"-shaped deep groove goaf isconstructed, the goaf is filled, and the goaf is filled close to back; and safe and efficient mining of the extra-thick
coal seam, low-cost and efficient filling of
coal gangue and the like and effective protection of the
ecological environment are achieved. The method can improve the
coal mining capacity, reduce the
coal mining cost, simplify the mining and filling connection relation, improve the filling capacity, guarantee the mining and filling safety, optimize the filling space structure, achieve full-
volume filling of the goaf, simplify the filling process
system, reduce the filling cost, expand the filling mining application range, liberate stagnant coal resources, improve the mine
recovery rate, efficiently fill the ground and the underground
coal gangue at low cost, solve the ecological
environmental protection problem, and achieve coal
resource development and utilization optimization and
ecological environment influence minimization on the whole.