爆破地震波作用下尾矿坝的有限元动力分析

为了了解某钼矿进行爆破采矿是否会对近距离的尾矿坝产生破坏作用,结合实际勘探资料,在二维静力非线性有限元分析的基础上,进行爆破地震波作用下坝体的动力反应分析,综合研究了动位移、动应力和加速度时程等关键物理量变化的规律性,并在此基础上进一步结合试验资料对坝体进行了液化判断及稳定性分析。分析结果表明,该钼矿在规定的爆心距、药量范围内进行爆破采矿时,相邻的尾矿坝是安全稳定的。本文的研究结果对爆破设计、现场采矿及尾矿坝体运行维护均具有一定的指导意义。

Finite Element Dynamic Analysis of Tailing Dam under Blasting Seismic Wave

In order to show whether the blasting of the molybdenum mining will produce damaging effects on the nearby tailing dam.In this paper,combined with the actual exploration data and based on static nonlinear finite element analysis,the finite element dynamic response analysis of tailing dam under the action of blasting seismic waves is performed.The displacement distribution,stress distribution and accele-ration distribution under dynamic effect are obtained and their regularities are analyzed.Furthermore,the liquefaction and stability of the tailing dam are researched utilizing experimental data.The results show that the tailing dam under adjacent action of blast seismic is secure and stable within the limits compass of blasting distance and explosive mass.What is more,the results have certain significance for blasting design,on-site mining and operation and maintenance of tailing dam.