地质与勘探2018，Vol.54Issue(3)：614-622,9.
渗流与地震作用下铁矿尾矿坝稳定性分析
Stability Analysis of Iron Ore Tailings Dams Under Action of Seepage and Earthquakes
摘要
Abstract
Tailings dams are different from the traditional water retaining dams,of which the packing materials are loose,non-uniform,and uncontrol-lable in filling quality.Under the action of earthquakes,heavy rainfall and other unfavorable factors,dam break can happen which will seriously endanger people's lives and property.Rational evaluation of stability of tailings dams under different conditions is the premise of disaster prevention and reduction. This paper takes an iron ore tailings dam of Inner Mongolia Baotou Steel Group as the research object.Through field investigations and laboratory tests,the stability of the tailings dam was preliminarily evaluated,and physical and mechanical parameters for stability analysis were obtained.Considering the role of strong rainfall seepage and earthquakes,by the soil slope stability analysis software including Geo-studio and STAB based on the limit equilibrium meth-od,the stability of the tailings dam under rainstorms,earthquakes and rainstorms plus earthquakes was calculated,respectively.Based on the finite element strength reduction method,according to the working conditions,the stability of the tailings dam was analyzed and compared by ABAQUS software.Then this work analyzed the differences between the three kinds of stability calculation methods in a potential sliding zone identification and stability calculation re-sults,and proposed a new method for tailings dam stability analysis under complex conditions,which combines the limit equilibrium method and finite ele-ment analysis.The results show that the 2# tailings dam in an iron mine under the seepage and earthquake is unstable,while the rest of the dam is in the steady state,providing a scientific basis for the evaluation of the tailings dam's break risk.关键词
尾矿坝边坡/地震与渗流作用/极限平衡法/强度折减法Key words
tailings dam slope/earthquake and seepage/limit equilibrium method/strength reduction method分类
天文与地球科学引用本文复制引用
王汉勋,张彬,张中俭,张东亮,冯军伟..渗流与地震作用下铁矿尾矿坝稳定性分析[J].地质与勘探,2018,54(3):614-622,9.基金项目
国家自然科学基金项目(编号:41572301 （）
61427802)和中央高校基本科研业务经费项目(编号:2-9-2015-071)联合资助. （编号:2-9-2015-071）
