尾矿坝边坡失稳判据研究  

Study on Instability Criterion of Tailings Dam Slope

作　　者：王来贵[1] 古新蕊[1] 

机构地区：[1]辽宁工程技术大学力学与工程学院

出　　处：《中国安全科学学报》2011年第8期80-84,共5页China Safety Science Journal

基　　金：国家自然科学基金资助(10972096);地质灾害防治与地质环境保护国家重点实验室开放基金资助(DZJK-0809);辽宁百千万人才工程项目(2008921035)

摘　　要：为避免尾矿库失稳破坏所带来的巨大损失和灾难,依据尾矿坝边坡破坏特征,将坝体边坡的破坏全过程分为连续的变形阶段和非连续的滑动阶段。建立相应的数学模型,采用蠕变理论及李雅普诺夫函数法分析尾矿坝边坡变形、滑动过程的稳定性,提出尾矿坝边坡失稳的加速度判据,得出滑动过程位移解析解。运用FLAC3D对山西某尾矿坝边坡进行计算,得到安全系数为1.67,边坡稳定;通过坝体边坡表面某点位移监测曲线可以看出ü<0,采用加速度判据可得此边坡稳定,与数值模拟结论相同。In order to reduce the huge loss and disaster caused by the tailings instability, the dam slope failure process is divided into two stages of deformation and sliding according to tailings dam slope destruction features. The creep theory and Lyapunov function method is used to analyze the stability of the process of deformation and sliding by establish a corresponding mathematical model. And then the acceleration criterion of tailings dam slope instability is offered and the analytical solution of displacement during sliding is worked out. The same conclusion was got that a certain tailings dam slope in Shanxi is stable between the method by numerical simulation of FLAC3D and the acceleration criterion method while safety coefficient is 1.67 and a 〈 0 in monitoring curve of displacement upon dam slope.

关 键 词：尾矿库 变形 滑动 失稳 蠕变 

分 类 号：X936[环境科学与工程—安全科学]