残煤复采回采巷道变形机理及支护研究

Research on Deformation Mechanism and Support of Mining Roadways in Residual Coal Remining

以白沟煤矿3号煤层残煤复采的实际情况为研究背景,对巷道围岩变形破坏情况进行了理论分析和数值模拟,并从岩土破损力学角度分析了破碎巷道围岩变形破坏机理,通过采用“注浆+锚(索)网”的支护方式,有效控制了残煤复采时破碎回采巷道围岩的变形量。

Based on the actual situation of residual coal re mining in the No.3 coal seam of Baigou Coal Mine,theoretical analysis and numerical simulation were carried out on the deformation and failure of the surrounding rock of the roadway.The deformation and failure mechanism of the fractured roadway surrounding rock was analyzed from the perspective of rock and soil damage mechanics.By adopting the support method of"grouting+anchor(cable)net",the deformation of the surrounding rock of the fractured mining roadway during residual coal re mining was effectively controlled.