巷道围岩稳定性的流固耦合数值分析

his paper applied multi-physical numerical simulation software COMSOL Multiphysics to establish the elastic-plastic flow-deformation model in porous media, for the weaker roadway surrounding rock and pore water pressure of engineering problems. The mechanical response of surrounding rock is simulated in different pore water pressure. After the contrastive analysis of stress distribution and state zone law, it is got that effective stress and rock strength is decreasing with the increasing of pore water pressure. And the increasing failure depth leads to failure of bolt. Research results provide a reference for the supporting, improving the safety of coal mine production.