【摘要】 境界矿柱稳定性分析是露天转地下矿山经常遇到的问题,对于矿山进行地下开采安全生产极其重要。针对石人沟铁矿露天转地下的实际情况,采用极限平衡分析和数值模拟方法,对具有代表性的境界矿柱进行了分析计算,为境界矿柱稳定性分析的方法进行了验证和补充,同时也为露天转地下境界矿柱厚度设计施工提供依据和指导。更多还原

【Abstract】 The stability of boundary pillar,which can be found across in mine shifting from open-pit to underground mining,is very important for safe production of underground mine. Based on the practice of Shirengou ore mine from open-pit to underground mining,the stabilities of boundary pillar at representative sections are calculated and analyzed by using the methods of limit equilibrium and numerical simulation. With the application of the limit equilibrium method and consideration of the thickness,span of boundary pillar,height of deposed rock,and obliquity of ore mine,the safety coefficients of all sections of boundary pillar are calculated, respectively. The safe thickness for boundary pillar has been modeled by the RFPA2D (rock failure process analysis)system,including deformation and failure of boundary pillar during caving. At the same time,the failure process of the different sections is simulated. By calculation,the safety and danger section of the boundary pillar is predicted. It validates the designed boundary pillar thickness and offers references to construction.更多还原