陷落柱影响采场围岩破坏的数值模拟分析

针对岱庄煤矿4325工作面在掘进过程中揭露一岩溶陷落柱的情况，结合以往研究成果和工作面实际情况，利用FLAC3D数值模拟软件建立三维模型，对工作面距岩溶陷落柱不同距离的垂直应力和水平应力进行模拟，分析得到：该工作面垂直应力、水平应力均小于地应力的正常值；由于岩溶陷落柱的存在，使应力应变分布极不均匀，陷落柱附近顸板应力在垂直方向的作用范围在40～50m．远离陷落柱其影响逐渐减小，但对底板岩层的最大破坏深度为25m。

Numerical Simulation Analysis for Influence of Subsided Columns on Failure of Face Surrounding Rocks

Aiming at present situation of a karst subsided column discovered in the heading process of Working Face 4325 of Daizhuang Coalmine and combining with existing research achievements and the practical situation of the face, the authors built a 3D model and simulated the vertical stress and horizon stress with different distances away from the karst subsided column by means of the FLAC3D software. The analysis concludes that both vertical stress and horizon stress are less than the normal value of ground stress~ due to the existence of subsided columns, the stress and strain distributions are very uneven and the scope of the roof stress in vertical direction in vicinity of subsided column is 40-50 m and the stress comes gradually smaller as the increase of distance away from the subsided column. The maximum failure depth of floor rock is 25 m.