露天矿土-岩复合边坡形态优化及失稳机理研究  

Optimal Design and Failure Mechanism of Soil-rock Composite Slope of Open-pit Mine

作　　者：陈鹏[1] 周志伟[1] 曹兰柱[1] 

机构地区：[1]辽宁工程技术大学矿业学院,阜新123000

出　　处：《世界科技研究与发展》2013年第6期690-693,708,共5页World Sci-Tech R&D

基　　金：国家自然科学基金(51104084;51004103);辽宁省重点实验室项目(LS2010075)资助

摘　　要：针对露天矿土-岩复合边坡构成及失稳破坏模式的复杂多样性,以依兰露天矿为研究背景,应用极限平衡分析法和强度折减法分别对采场、排土场及二者构成的土-岩复合边坡稳定性进行了分析,优化边坡最终形态,研究其滑坡模式与机制。结果表明:当采场边坡角41°,与排土场相距80 m时,复合边坡达最优形态,边坡破坏模式为在自重力作用下,坡面向外蠕变引发的圆弧滑动;极限平衡法简单、可靠,其与强度折减法相结合可弥补各自的不足,结果可靠,便于复合边坡的优化设计。Considering the variable constitution and failure mode of soil-rock composite slope, based on the strength reduction method and the limit equilibrium theory, a case study of Yilan open-pit mine is carried out, in which the stability of dump slope, stope slope and composite slope are analysed separately. Then the form of slope is opiimized;with its failure mode and mechanism studied. The result indicates that when angle of stope slope is 41 ~ and distance from dump to stope is 80m, composite slope is in its optimal form;failure mode is circular sliding;the combination of strength reduction method and the limit equilibrium theory to optimize form of slope is reliable and accurate.

关 键 词：复合边坡 刚体极限平衡法 数值模拟 优化设计 失稳机理 

分 类 号：TD804[矿业工程—矿山开采]