缓倾斜厚煤层回采巷道水力压裂卸压技术应用研究

针对缓倾斜厚煤层回采巷道受采动影响大变形问题,选取枣泉煤矿140204工作面13、14采区胶带大巷为研究对象,研究了缓倾斜厚煤层回采巷道顶板水力压裂卸压技术。现场调查研究了二煤层临近工作面运输巷变形破坏特征与原因,分析了二煤层140204运输巷工程地质条件,并设计了回采巷道顶板水力压裂卸压对13、14采区胶带大巷护巷方案,提出了“顶板水力压裂卸压”回采巷道围岩控制稳定方法并付诸于实践,工程实践证明卸压效果良好,巷道围岩保持正常使用。

Study on application of hydraulic fracturing pressure relief technology in coal winning roadway of gently inclined thick coal seam

In view of large deformation of mining roadway affected by mining in gently inclined thick coal seam，the belt roadway in 13 and 14 mining areas of the 140204 working face of Zaoquan Coal Mine was selected as research object，and hydraulic fracturing pressure relief technology of roof of mining roadway in gently inclined thick coal seam was studied.In this paper，the characteristics and causes of deformation and failure of haulage roadway near the second coal seam were investigated，the engineering geological conditions of 140204 haulage roadway near the second coal seam were analyzed，and the scheme of protecting roadway by hydraulic fracturing pressure relief of the roof of stope roadway was designed，and the method of controlling and stabilizing surrounding rock of roadway by "hydraulic fracturing pressure relief of roof" was put forward and put into practice.The effect was good，and the surrounding rock of roadway was kept in normal use.