基于Hoek-Brown准则的巷道围岩力学响应特征分析

Mechanical Response Characteristics Analysis of Wall Rock of Roadway Based on Hoek-Brown Criterion

基于Hoek-Brown准则对巷道围岩进行了弹塑性分析,开展了算例分析和数值模拟研究。结果表明:围岩应力场、位移场、塑性变形区均呈对称性分布;垂直位移量约是水平位移量的5倍,随着表面围岩向深部延伸,位移量逐渐减小直至为0。围岩开挖后形成了一个环形的塑性变形区。

Based on Hoek-Brown Criterion,it conducts theelastoplasticity analysis on the wall rock of roadway,and carries out the analysis of examples and numerical simulation study.The results show that wall rock field of stress, and plastically deforming area are all in the distribution of symmetry;the vertical displacement is five times of the horizontal displacement;and with the surface wall rock extends to the deep,the displacement will generally decrease to zero.When the wall rock is excavated,a circular plastically deforming area is formed.