露天开采人工边坡岩土体变形计算及安全评估  

Deformation Calculation in Soil and Rock Mass of Slope in Open-Pit Mining and Its Safety Evaluation

作　　者：郭麒麟[1,2] 乔世范[1] 王璐[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]长江委岩土工程总公司,湖北武汉430010

出　　处：《采矿与安全工程学报》2012年第5期679-684,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2011CB710601);国家自然科学基金项目(50708116)

摘　　要：露天开采会产生大量的人工边坡,为了更好的对人工边坡的安全性进行评估,基于随机介质理论,推导出了边坡开挖导致岩土体的移动和变形计算公式,提出了开挖边坡变形破坏判据及周边环境安全评价准则。针对土体移动和变形计算公式的不可积性,对其计算方法进行了研究,采用条分法获得了预测开挖边坡岩土体变形的半解析解。通过工程实例,能很好的预测开挖引起的边坡体的位移和变形,同时利用变形破坏判据可方便的对边坡的安全性进行评估,为人工边坡的工程处治措施设计提供参考。Open-pit mining may result in many excavating slopes. In this paper, to evaluate the safety of excavating slope, based on the stochastic medium theory, we deduced the formulae for calculating movement and deformation of rock and soil mass induced by slope excavation, proposed the deforma- tion failure criterion of stochastic medium and the criterion for estimating the safety of surroundings. Meanwhile, in view of the non-integrability of the formulae, the computing method for the formulae is further studied, that is, the slice method is used to get the semi-analytical solution to predict the defor- mation of rock and soil mass. Through an engineering example, the criterion can be well used to predict movement and deformation of the rock and soil mass induced by open-pit mining, and to evaluate the slope safety easily, which can provide reference for the treatment measure design of slope.

关 键 词：开挖边坡 变形破坏判据 随机介质 岩土体位移 

分 类 号：TD824[矿业工程—煤矿开采]