上行无煤柱走向长壁跨上山连续采煤法的研究与运用

Research and Application of Long wall and Cross Mountain Continuous Mining Method in Upward Direction Without Coal Pillar

基于红岩煤矿按传统走向长壁采煤法时,区段巷道布置在煤层,留设区段煤柱,自上而下逐段回采,存在采空区水害和区段煤柱损失大等问题。研究出一种上行无煤柱走向长壁跨上山连续开采方法,既解决了工作面水害,回采率还提高了17%,沿空留巷顶底移近最大29 mm,两帮移近量最大19 mm。

Based on the traditional strike long wall mining method in Hongyan Coal Mine,the section roadways are arranged in the coal seam,the section coal pillars are reserved and the mining is carried out section by section from top to bottom.A continuous mining method with long wall and over hill in upward direction without coal pillar is studied.It not only solves the water disaster of working face,but also improves the recovery rate by 17%.The maximum displacement of the top and bottom of gob side entry retaining is 29 mm,and the maximum displacement of two sides is 19 mm.