摘要
为了对黑岱沟露天煤矿2020年倒堆台阶边坡进行边坡破坏模式分析和稳定性评价,结合工作区的地质条件,利用FLAC3D数值模拟软件,对倒堆台阶边坡进行了边坡变形破坏模式数值模拟,利用极限平衡理论对边坡的稳定性进行评价,进而提出了边坡工程管理预控方案。结果表明:倒堆两侧剪应变集中程度明显,松动滑动面呈楔形,在塑性区域较集中的位置易发生局部片帮和崩塌;倒堆台阶边坡整体安全系数大于1.1,符合规范要求,边坡整体稳定,局部台阶安全系数小于1.1。
In order to analyze the failure mode and stability evaluation of the dump bench slope of Heidaigou Open-pit Mine in 2020,based on the engineering geology situation of the working area,we carry out the numerical simulation of deformation and failure modes of the dump bench slope model using FLAC3D,and evaluate slope stability by limit equilibrium theory,and present the pre-control scheme of slope engineering management.The results show that the shear strain concentration degree on both sides of the dump bench slope is obvious.The loose sliding surface is wedge-shaped,local flaking and collapse are easy to occur at the position where the plastic area is concentrated.The overall safety factor of the inverted pile step slope is bigger than 1.1,which meets the specification requirements and is stable.The safety factor of some local steps is less than 1.1.
作者
万国祥
贺龙
刘东兵
WAN Guoxiang;HE Long;LIU Dongbing(Heidaigou Open-pit Coal Mine,National Energy Group Zhuneng Group,Ordos 010300,China)
出处
《露天采矿技术》
CAS
2021年第5期20-23,共4页
Opencast Mining Technology
关键词
倒堆台阶
边坡稳定性
破坏模式
稳定性评价
数值模拟
dump bench
slope stability
failure mode
stability evaluation
numerical simulation
