琅琊山露天矿山边坡稳定性的离散单元强度折减法分析

Analysis of Langyashan Open Pit Mine Slope Stability by Strength Reduction Method of Discrete Element

为了能够准确地反映琅琊山露天矿山岩体的特征面貌,更好地模拟该矿山边坡的安全稳定状况,通过离散单元法与强度折减技术,获取了琅琊山露天矿山边坡的安全稳定性系数,分析了该边坡岩体位移场和应力场分布情况,以及塑性区发育特征。边坡数值分析结果表明,琅琊山露天矿山边坡的岩体中含有许多不同构造的复杂结构面,在外界应力很小的情况下,边坡岩体的稳定性主要由其内在结构面所决定。离散单元法可以获取边坡岩体真实的几何特征,强度折减法可以通过改变岩体的抗剪强度来获得边坡岩体的安全系数,基于离散单元法的强度折减技术可以更准确的分析该露天矿山边坡的安全稳定性。

In order to accurately reflect the characteristics of Langyashan open-pit mine sloperock mass,and better simulate the safety and stability,the safety and stability coefficient of an open-pit mine slope is obtained through the integration of discrete element method and strength reduction technology,and the distribution of rock displacement field and stress field,as well as the development characteristics of plastic area are analyzed.The results of slope numerical analysis show that,there are many complex structural planes with different structures in the rock mass of Langyashan open pit mine slope,and the stability of the rock mass is mainly determined by its internal structural plane when the external stress is very small.The discrete element method can obtain the true geometric characteristics of the slope rock mass,the strength reduction method can obtain the safety factor of the slope rock mass by changing the shear strength of the rock mass,and the strength reduction technology based on the discrete element method can more accurately analyze the safety and stability of the open pit mine slope.