不同倾角煤层区段煤柱围岩变形数值模拟研究

Numerical Simulation on Surrounding Rock Deformation of Section Pillars with Different Dig Angles

以平煤集团十三矿为地质背景,利用数值模拟手段,研究不同倾角煤层区段煤柱围岩变形特征。研究表明:随着煤层倾角的增大,区段煤柱应力峰值距煤壁的距离、塑性区宽度、围岩变形量均减小;倾斜煤层煤柱两侧变形呈不对称分布,煤柱下帮围岩变形量大于煤柱上帮;并且煤层倾角越大,煤柱变形不对称性越明显。

Based on the Mine No.13 of Pingdingshan Coal Group, numerical simulation was used to study the deformation characteristics of surrounding rocks of section pillars with different dig angles. The results showed that： the bigger the dig angle was, the smaller the distance between the stress peak of pillars and coal wall, the width of plastic zone, and the deformation of surrounding rocks became. The distribution of two-side deformation of inclined seam pillars was asymmetric： the deformation of the lower part was bigger than the upper part of the pillars. Besides, the larger the angle was, the more obvious the asymmetry of the deformation.