许厂煤矿下组煤开采底板破坏深度综合分析法

Integrated analysis of destroyed floor depth of the lower coal cluster mining in Xuchang Coal Mine

以许厂煤矿下组煤首采工作面11603为研究对象,综合应用统计学、弹塑性力学、断裂力学、数值模拟以及电法实测等综合分析方法,确定了底板开采底板破坏深度。结果表明:弹塑性力学和断裂力学方法预测分别为13.0和12.9 m;而运用FLAC3D进行底板变形破数值模拟得出的底板下塑性区破坏深度为12.0 m,与高密度电法实测底板破坏深度13.0 m结果差别不大。

Taking the 11603 coal mining face in Xuchang Coal Mine as the study object, This paper have studied the mechanism with statistic method,elastic and plastic analysis,fracture mechanics ,numerical simulation and electrical method to determinate the mining affected to the floor failure depth. The testing results show that the elastic -plastic mechanics and fracture mechanics method to predict were 12. 99m and 12.9 m ;While using the FLAC3D numerical simulation of floor deformation of under the floor, the plastic zone depth is 12. 0 m,With high density electrical method measured bottom destruction depth of 13.0 m.