露天转地下开采围岩稳定性数值模拟分析  

Numerical Simulation Analysis on Wall Rock Stability in Transition from Open Pit to Underground Mining

作　　者：王军[1,2] 

机构地区：[1]山东理工大学 [2]北京科技大学

出　　处：《金属矿山》2010年第1期48-50,共3页Metal Mine

基　　金：山东省科技攻关(编号:2008GG10006016)

摘　　要：采用有限元数值模拟方法,研究露天转地下开采中次生应力对巷道围岩稳定性影响。分析结果表明,水平应力对围岩稳定性有重要影响,侧压系数大于0.5,水平应力对围岩产生不利影响;侧压系数大于2.0,不利影响迅速扩大。围岩中存在铰接拱结构,围岩体通过这种结构来承担上部荷载。The influence of induced stress on wall rock stability under transition from open pit to underground mining was researched by the finite element numerical simulation.It is indicated that plane stress greatly influence the wall rock stability.When the side press modulus is over 0.5,the plane-stress has a disadvantage influence on wall rock;When the side press modulus is over 2.0,the disadvantage influence extends rapidly.The ream arch structure exists in wall rock which can undertake the upside load through this structure.

关 键 词：露天转地下开采 侧压系数 水平应力 

分 类 号：TD861.1[矿业工程—金属矿开采] TU457[矿业工程—矿山开采]