基于离散元法的岩质高边坡稳定性分析  

Stability Analysis of High Rock Slope Based on Discrete Element Method

作　　者：李钰强 姚晨辉 姜建伟 赵洲[2] 马健全 LI Yuqiang;YAO Chenhui;JIANG Jianwei;ZHAO Zhou;MA Jianquan(Northwest Engineering Corporation Limited,Power China,Xi′an,Shaanxi 710065,China;College of Geology and Environment,Xi′an University of Science and Technology,Xi′an,Shaanxi 710054,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [2]西安科技大学地质与环境学院,陕西西安710054

出　　处：《水利与建筑工程学报》2024年第4期79-84,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金青年科学基金项目(41602359)。

摘　　要：岩质边坡的失稳往往是在不良结构面的控制下发生的,特别高陡岩质边坡的失稳破坏。某抽蓄电站下库库尾段为露采矿山遗留的岩质高边坡,距离拟建下水库库尾段直线距离仅45 m,对工程建设存在巨大安全隐患。在人工测窗的基础上,利用三维激光扫描技术获取了岩质边坡结构面的详细数据,并结合离散元PFC2D方法对该岩质边坡进行分析和评价。结果表明,该岩石边坡主要发育NE60°~70°/NW∠3°~7°、NE13°~70°/SE∠70°~87°和NW293°~330°/SW∠71°~90°三组结构面。岩石边坡在天然工况下基本稳定,在暴雨、地震工况下稳定性差或不稳定,5 m~10 m深度范围可能会产生垮落和掉块现象,估算潜在危岩体约4.8×10^(4)m^(3)。The instability of slope often occurs under the control of poor structural surface,especially the instability and failure of high and steep rock slopes.The tail section of the lower reservoir of a pumped storage power station is a high rock slope left over from the open mining mountain,which is only 45m away from the straight line distance of the end section of the proposed lower reservoir,which has huge potential safety hazards for the construction of the project.On the basis of obtaining the structural planes of rock slopes through manual measurement windows and 3D laser scan-ners,this article uses discrete element numerical simulation to analyze and evaluate the stability of high slopes left be-hind by mining in the tail section of a pumped storage power station.The results show that the slope mainly develops three structural planes:NE60°~70°/NW∠3°~7°,NE13°~70°/SE∠70°~87°and NW293°~330°/SW∠71°~90°.The failure of the surface rock mass of the slope is analyzed by the particle discrete element PFC2D,which is ba-sically stable under natural working conditions,poor or unstable under heavy rain and seismic conditions,and the col-lapse and falling blocks may occur in the depth range of 5 m~10 m,and the potential dangerous rock mass is esti-mated to be about 4.8×10^(4)m^(3).

关 键 词：高边坡 结构面 三维激光扫描 离散元方法 稳定性分析 

分 类 号：TU457[建筑科学—岩土工程]