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采用FLAC3D数值模拟软件,对平顶山某矿己煤组工作面穿越戊煤组上山巷道开采的可行性进行了预测和分析.根据采后模型应力重新分布的情况得出裂隙带的发育高度,并结合经验公式法的计算结果,得出了裂隙带的高度最大值小于层间距,不会影响戊组上山巷道通风安全的结论;同时根据采后巷道所在层位岩层的水平和垂直位移,得出巷道围岩的水平变形、倾斜和曲率值,经与巷道允许的极限变形值比较,确定了戊组上山巷道的破坏范围和程度.结果表明,戊组上山巷道经局部维修后不会影响其通风功能,下煤层穿越上山开采是安全可行的.
FLAC3D numerical simulation software was used to predict and analyze the feasibility of mine a coal seam working face crossing the petroliferous coal mine in Pingdingshan.According to the stress redistribution of the post-harvest model, the development height of the fracture zone was obtained and combined The results of the empirical formula method show that the maximum height of the fractured zone is less than the distance between layers and will not affect the ventilation safety of the upper echelon laneway. In addition, the horizontal and vertical displacements of the strata layer where the post- The horizontal deformation, inclination and curvature of the surrounding rock are compared with the limit deformation value of the roadway to determine the extent and extent of the failure of the uphill roadway in the Pentagon.The results show that the uphill roadway in the E group will not affect its ventilation function after local maintenance It is safe and feasible for the lower coal seam to go through the uphill mining.