降雨条件下老岭排土场边坡渗流及稳定性分析

Analysis of Seepage and Stability of Laoling Dump Slope under Rainfall Conditions

降雨是导致排土场边坡失稳破坏的主要原因之一,因此研究降雨对排土场边坡稳定性的影响规律尤为重要。研究以某露天金属矿老岭排土场为例,结合二维有限元软件Geo Studio的SEEP/W模块和SLOPE/W模块,对比分析不同降雨条件下对金属矿排土场边坡渗流以及稳定性的影响。结果表明降雨对老岭排土场边坡渗流场影响较大,可以明显降低边坡稳定性,坡脚区域受降雨的影响时间最长,因此降雨条件下诱发的边坡失稳破坏大部分发生在边坡坡脚处,可以为类似金属矿排土场的安全生产提供参考。

Rainfall is one of the main reasons leading to the instability of the slope of the dumping site. Therefore, it is especially important to study the influence of rainfall on the slope stability of the dumping site. In this study, an open-pit metal mine Laoling dump site is taken as an example. On the basis of the two-dimensional finite element software Geo Studio SEEP/W module and SLOPE/W module, the seepage and stability of metal mine dump slope are compared and analyzed under different rainfall conditions. The results show that rainfall has a great influence on the seepage field of the slope of Laoling dump, which can significantly reduce the stability of the slope. The slope area is affected by rainfall for the longest time. Therefore, most of the slope instability induced by rainfall conditions occurs.The research provides good reference for the safe production of the corresponding metal mine dump.