含顺倾弱层边坡三维稳定性计算方法研究  

Research on method for calculating three-dimensional stability of slope with inclined weak-layers

作　　者：王东[1] 李广贺[1] 曹兰柱[1] 徐晓惠 张立国 WANG Dong;LI Guanghe;CAO Lanzhu;XU Xiaohui;ZHANG Liguo(College of Mine,Liaoning Technical University,Fuxin Liaoning 123000, China;Inner Mongolia Pingzhuang Energy Co., Ltd, Chifeng Inner Mongolia 024000, China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]内蒙古平庄能源股份有限公司,内蒙古赤峰024000

出　　处：《中国安全科学学报》2019年第3期95-101,共7页China Safety Science Journal

基　　金：国家自然科学基金资助(51874160);辽宁省高等学校创新人才支持计划项目(LR2016039)

摘　　要：为了解决含顺倾弱层边坡弱层暴露长度的计算难题,综合考虑岩体赋存特征与滑体三维空间形态,构建含顺倾弱层边坡三维滑体的简化力学模型,分析滑体边界上的力学条件,基于极限平衡理论,推导获得确定弱层暴露长度的含顺倾弱层边坡三维稳定性计算方法。将该方法应用于白音华一号露天煤矿,并采用基于连续介质力学的离散元方法(CDEM)进行模拟验证。研究结果表明:白音华一号露天煤矿非工作帮边坡稳定系数Fs与弱层暴露长度L负相关,临界暴露长度约为500 m,允许暴露长度约为300 m;通过该方法确定的弱层暴露长度与模拟结果有显著的一致性。For the sake of calculating the exposed length of the slope with inclined weak-layers,and considering the occurrence characteristics of rock mass and the spatial geometry of the potential landslide,a simplified mechanical model was built for the three-dimensional landslide of the slope with inclined weaklayers. The mechanical conditions on the boundary of landslide body were analyzed. A method for the three-dimensional stability of slopes by calculating the exposed length of inclined weak-layers was obtained with the theory of limit equilibrium. The method was verified by CDEM in Baiyinhua 1 st open pit mine. The results show that there is a negative correlation between the stability coefficient F_s and the exposed length L of the weak layer in Baiyinhua 1 st open pit mine non-working slope,the critical exposed length is about 500 m and the allowable exposure length is about 300 m,and that the exposed length of weak layer determined by this method comforms with the simulation results.

关 键 词：边坡稳定性 顺倾弱层 三维极限平衡法 暴露长度 基于连续介质力学的离散元方法(CDEM) 

分 类 号：X928.[环境科学与工程—安全科学]