布沼坝露天矿西帮变形滑坡成因与稳定性分析  

Causes of deformation landslide and stability analysis of western slope in Buzhaoba Open-pit Mine

作　　者：陈伟 孔江荣 平金龙 平玮 CHEN Wei;KONG Jiangrong;PING Jinlong;PING Wei(Yunnan Xiaolongtan Mining Bureau Co.,Ltd.,Kaiyuan 661699,China;School of Mines,China University of Mining&Technology,Xuzhou 221116,China)

机构地区：[1]云南小龙潭矿务局有限责任公司,云南开远661699 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《露天采矿技术》2025年第2期17-21,共5页Opencast Mining Technology

基　　金：国家自然科学基金面上资助项目(52374144);辽宁省自然科学基金-国家重点实验室联合开放基金资助项目(2022-KF-23-10)。

摘　　要：为了揭示布沼坝露天矿西帮变形滑坡成因,实现对该边坡稳定性的精准评价;系统地分析了地层岩性、岩体结构、水和工程扰动等因素对西帮滑坡的影响,采用FLAC3D和强度折减法对西帮变形区的4个典型剖面进行数值建模和稳定性分析。结果表明:地下水对边坡弱层的长期浸润和采矿工程扰动是造成本次滑坡的主要原因;数值模拟得到的334剖面和340剖面的稳定系数为1.230和1.176,处于稳定状态;而336剖面和338剖面的稳定系数为1.066和1.082,这2个剖面之间处于欠稳定状;分析结果与西帮滑体实际发育状态吻合。In order to reveal the causes of deformation landslides on the western slope of Buzhangba Open-pit Mine and achieve the accurate evaluation of slope stability,the article systematically analyzes the influence of factors such as formation lithology,rock mass structure,water,and engineering disturbance on the western slope.The article uses FLAC3D and strength reduction methods to perform numerical modeling and stability analysis on four typical sections in the deformation zone of western slope landslide.The results show that the long-term infiltration of groundwater into weak layers of the slope and mining engineering disturbance are the main causes of the landslide.The stability coefficients of the 334 and 340 profiles obtained from numerical simulation are 1.230 and 1.176,respectively,indicating a stable state.The stability factors of sections 336 and 338 are 1.066 and 1.082,respectively,indicating that these two sections are under-stable.The analysis results are consistent with the actual development state of the western slope landslide.

关 键 词：边坡滑坡 稳定性 弱层 数值模拟 强度折减法 

分 类 号：TD824.7[矿业工程—煤矿开采]