中文摘要：

针对金属矿山开采巷道围岩变形失稳破坏问题,以兰家沟钼矿巷道为例,对兰家沟钼矿深埋平巷中典型区段建立MIDAS三维模型,分析支护初期围岩应力、应变变化规律及支护结构的内力变化,并通过现场测试分析验证支护结构的合理性,对巷道围岩失稳与破坏机理、支护结构作用进行了深入研究。

英文摘要：

Focused on the deformation and failure of surrounding rock caused by excavating tunnel in the metal mine,and taking the tunnel of Lanjiagou molybdenum mine as a case,MIDAS 3 D model is established to simulate the typical sections of deep tunnel in Lanjiagou molybdenum mine,and analyze the variation of stress and strain of surrounding rock in initial support as well as the variation of internal force of supporting structure. The validity of supporting structure can be proved by site test,and the failure mechanism and supporting structures of surrounding rocks were deeply investigated.