Study on waste-filling method and technology in fully-mechanized coal mining

The development course of backfilling mining technology was briefly reviewed,and pointed out two difficulties in developing the technology,that was to build the strata control theory in filling mining and to solve some technical approaches of transporting backfill to the goaf,the transport passage,the power and so on.Furthermore,the equivalent mining height method of the strata control in solid filling mining and the ground subsidence prediction was built.The principle and method of solid filling in fully-mechanized coal mining(SFFMCM) adapted to the traditional fully-mechanized coal mining(FMCM) technology was provided and the filling mining system and equipment self-developed were introduced at length.Industrial tests show that by using this technology not only can achieve the solid stowing to control strictly strata movement and ground subsidence prediction but also can achieve the economic benefit with high production and high recovery and environmental benefit.