摘要
开展软弱夹层存在及倾角变化对边坡稳定性的影响研究,揭示软弱夹层对边坡稳定性的影响机制,设计存在软弱夹层和不存在软弱夹层两种工况,构建不同台阶坡面角边坡数值计算模型,计算各模型边坡稳定性系数,对比分析计算结果。同时建立软弱夹层不同倾角的岩质高边坡模型,开展软弱夹层倾角变化对边坡稳定性影响的研究。研究结果表明:软弱夹层易成为边坡潜在滑移面而严重破坏边坡安全;边坡存在软弱夹层相比不存在软弱夹层,边坡稳定性降低了48.4%~61.9%;软弱夹层倾角与边坡稳定性系数成负相关关系,但缓倾软弱夹层依旧要引起重视,避免边坡以其为滑移面产生滑坡灾害。研究成果为此类含软弱夹层的露天矿山提供一定的借鉴意义和治理经验。
Carry out the research on the influence of the existence of weak interlayer and the change of inclination angle on the slope stability, reveal the influence mechanism of weak interlayer on the slope stability, design the two working conditions of the existence of weak interlayer and the absence of weak interlayer, build the numerical calculation model of slope angle with different steps, calculate the slope stability coefficient of each model, and compare and analyze the calculation results. At the same time, the rock high slope model with different dip angles of weak interlayer is established, and the influence of the change of dip angle of weak interlayer on slope stability is studied. The results show that the existence of weak interlayer is easy to become the potential slip surface of slope and seriously damage the safety of slope;Compared with the non existence of weak interlayer, the slope stability is reduced by 48.4%~61.9%;There is a negative correlation between the inclination of weak interlayer and the slope stability coefficient, but attention should still be paid to the gently inclined weak interlayer to avoid landslide disaster with it as the sliding surface of the slope. The research results provide some reference and treatment experience for such open-pit mines with weak interlayer.
作者
鄂玉强
E Yuqiang(Changsha Institute of Mining Research Co.,Ltd.,Changsha,Hunan 410012,China;State Key Laboratory of Safety Technology of Metal Mines,Changsha,Hunan 410012,China)
出处
《中国锰业》
2022年第4期6-11,共6页
China Manganese Industry
关键词
软弱夹层
岩质高边坡
边坡稳定性
倾角变化
潜在滑移面
Weak interlayer
High rock slope
Slope stability
Inclination change
Potential slip surface
