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基于岩层变形破坏理论,计算得到汪洋煤矿水下采煤K_7煤层的煤岩柱厚度;结合水文地质条件,分析得到开采K_7煤层后形成的导水裂缝带不会波及到地表水体,不会导致越溪河水直接充入矿井而引发涌水事故。采用FLAC数值模拟方法对K_7煤层水下开采引起的回风巷道变形进行了预测。
Based on the theory of deformation and failure of rock strata, the thickness of coal and rock pillar in coal seam K_7 in Wangyang coal mine is calculated. Based on the hydrogeological conditions, it is found that the water-conducting fractured zone formed after the mining of K_7 coal seam does not affect the surface water body, River water directly into the mine and caused a gushing accident. FLAC numerical simulation method is used to predict the deformation of return airway caused by underwater mining in K_7 coal seam.