Longwall face mining boundary coordinated backfill water conservation mining method

Abstract

The application discloses a kind of longwall face mining boundary coordinated filling water conservation mining method, by in working face mining process, in turn form cut eye coordinated filling area, two side boundary coordinated filling area and stop mining line coordinated filling area, finally complete working face mining is surrounded by four coordinated filling areas around goaf, and the filling body form in each coordinated filling area is gradually reduced filling height from goaf boundary to goaf middle part, by this coordinated filling processing mode and according to the size of each coordinated filling area construction, and each coordinated filling area can adapt to the strata movement characteristics of coal mining, realize the overall bending subsidence of layered overburden, reduce the development height of water-conducting fractured zone, inhibit the long boundary crack formed by surface step subsidence, so as to effectively reduce the range of long crack formed at the mining boundary, and reduce the development height of water-conducting fractured zone, make the crack away from the upper phreatic aquifer, so as to realize the protection of water resources, and ensure the mining efficiency.

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