基于数值模拟的露天矿高陡边坡可靠度分析  

Reliability Analysis of High and Steep Slopes in Open Pit Mines Based on Numerical Simulation

作　　者：尹归 陶干强[1] 朱忠华[1] 孙海帝 YIN Gui;TAO Ganqiang;ZHU Zhonghua;SUN Haidi(School of Resources Environmental Safety Engineering,University of South China,Hengyang,Hunan 421001,China;Hunan Shizhuyuan Nonferrous Metals Co.,Ltd.,Chenzhou,Hunan 423037,China)

机构地区：[1]南华大学资源与环境安全工程学院,湖南衡阳421001 [2]湖南柿竹园有色金属有限公司,湖南郴州423037

出　　处：《南华大学学报（自然科学版）》2022年第3期15-21,共7页Journal of University of South China：Science and Technology

基　　金：金属矿山安全与健康国家重点实验室开放基金项目(2018-JSKSSYS-01);国家自然科学基金资助项目(51574151);湖南省教育厅科学研究优青资助项目(21B0446)。

摘　　要：本研究将数值模拟与可靠度理论相结合进行露天矿高陡边坡稳定性分析,在数值模拟前处理上,实现边坡模型四面体剖分。基于FLAC^(3D),利用强度折减法得到其最可能滑动面和相应的安全系数,根据边坡位移等值云图,搜索并保存等值线最为密集区域的数据点坐标并进行非线性拟合,找出该边坡的潜在破坏面进行可靠度计算。将该方法用于某高陡边坡稳定性分析,求得可能滑动面安全系数为1.80,边坡潜在破坏以圆弧形剪切破坏为主;可靠度计算收敛时,求得可靠度指标β为2.3818,破坏概率P_(f)为0.8656%。结果表明:该边坡在安全系数为1.80时,其破坏概率为0.8656%,属于稳定边坡。This study combines numerical simulation and reliability theory to analyze the stability of high and steep slopes in open-pit mines.In the preprocessing of numerical simulation,the tetrahedral division of the slope model is realized.Based on FLAC^(3D),the most likely sliding surface and the corresponding safety factor are obtained by the strength reduction method.The reliability calculation is performed on the potential failure surface of the slope.This method is applied to the stability analysis of a high and steep slope,the safety factor of the possible sliding surface is obtained as 1.80,and the potential failure of the slope is mainly arc shear failure;when the reliability calculation converges,the relia-bility indexβis obtained as 2.3818,and the failure probability P_(f) is 0.8656%.The results show that when the safety factor is 1.80,the failure probability of this slope is 0.8656%,which is a stable slope.

关 键 词：四面体剖分 高陡边坡 稳定性分析 数值模拟 可靠度计算 

分 类 号：TD824[矿业工程—煤矿开采]