高寒地区冻土对尾矿库渗流稳定的影响

Influence of Frozen Soil on Seepage Stability of Tailings Reservoir in Alpine Region

针对高寒地区尾矿库冻土的特点,采用Midas软件建立反映冻土地区特征的尾矿库数值模型,并对尾矿库进行渗流稳定分析。结果表明,深部多年冻土层对浸润线具有抬升作用,会增大尾矿库的潜在位移,降低安全稳定系数,并且最终导致尾矿坝受到渗透破坏,从而影响尾矿坝的整体安全。在此基础上,分析了计算结果的可靠性并提出相应的防护措施。

On the characteristics of frozen soil in tailings reservoir in alpine region,the numerical model of tailings reservoir reflecting the characteristics of frozen soil area is established by Midas software,and the seepage stability of tailings reservoir is analyzed.The results show that the deep permafrost layer has a lifting effect on the saturation line,which will increase the potential displacement of the tailings reservoir,reduce the safety and stability coefficient,and eventually lead to the seepage failure of the tailings dam,thus affecting the overall safety of the tailings reservoir.The reliability of the calculation results is analyzed and corresponding protective measures are put forward.