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以赞比亚一露天铜矿南帮边坡(矿体下盘)为研究对象,将Rosenbluth点估计方法与节理有限元方法相结合应用于该节理发育的岩质边坡稳定性评价中.建立以边坡岩体材料强度参数(内摩擦角和黏聚力)为输入变量,安全系数为输出变量的概率模型,点估计状态函数的求解过程引入节理有限元方法.通过现场节理及结构面调查,建立边坡节理有限元模型求解边坡安全系数,得到基于安全系数的边坡变形破坏概率统计指标,对边坡稳定性进行了概率分析,分析结果与现场失稳情况一致.该方法既考虑了岩体材料参数在赋值过程中实际存在的不确定性,同时也考虑了节理岩质边坡的节理属性,充分体现了岩层接触作用的非线性关系,使得对节理岩质边坡的稳定性评价更加合理.
Taking the slope of the southern slope of open copper mine in Zambia as the research object, the Rosenbluth point estimation method and the finite element method of jointing are applied to the rock slope stability evaluation of the joint development. The slope rock mass material strength parameters (internal friction angle and cohesion) are the input variables, the safety coefficient is the probability model of the output variables, and the finite element method is introduced to solve the state function of point estimation. Through the field joint and structural plane survey, Slope finite element model is used to solve the slope safety factor, the statistical index of slope failure probability based on the safety factor is obtained, and the slope stability is analyzed probabilistically. The analysis result is consistent with the case of on- The material parameters in the process of the actual existence of uncertainty, but also consider the joint properties of the jointed rock slope, fully reflects the nonlinear relationship between rock contact, making the stability of the joint rock slope evaluation more reasonable.