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权家河矿设计年产60万吨,目前仅开采一层煤,煤层厚1.8～3.5米,全面推行长壁采煤法。原设计分两层开采,工作面长100～130米,采用集中平巷、溜煤眼、分层顺槽的布置方式,两工作面之间留10～15米宽的护巷煤柱。由于煤层厚度变化影响,实际上绝大多数工作面都没有分层开采,资源损失很大,采区回采率仅在50%左右,严重地缩短
With an annual output of 600,000 tons, Quanjiahe Mine currently only mines a layer of coal with a thickness of 1.8-3.5 meters and fully implements the Longwall Mining Law. The original design is divided into two layers of mining, working face length of 100 to 130 meters, the use of centralized lanes, slip coal eyes, stratified-slot arrangement, between the two face to stay 10 to 15 meters wide roadway pillars. Due to the change of coal seam thickness, in fact, most of the working face is not stratified mining, the loss of resources is very large, the mining area recovery rate is only about 50%, seriously shortening