连续强降雨对堆浸场高边坡稳定性影响分析

本文根据非稳定渗流理论,采用三角形瞬态孔压分布函数法和稳定渗流边界法两种方法,分别模拟不同降雨强度和降雨历时工况下的堆浸场内部饱和~非饱和渗流场,得到瞬态孔隙水压力的空间分布以及时程分布,并基于刚体极限平衡理论,利用Bishop法和Morgenstern-Price法分析连续强降雨对矿堆高边坡稳定性的影响程度及随时间的变化过程。分析结果表明,随着降雨强度和降雨历时的增加,由三角形瞬态孔压分布函数法模拟渗流场计算的最小抗滑安全系数更低且减小的速率较快,对矿堆边坡稳定性影响较大,有可能会发生局部或整体滑坡。

Influence of continuous heavy rainfall on stability of high slope of heap leaching site

Based on the unsteady seepage theory, the triangular transient pore water pressure distribution function method and the stable seepage boundary method are used to simulate the saturated unsaturated seepage field in the heap leaching site under different rainfall intensity and duration respectively, and the spatial distribution and time-varying process are obtained. Based on the rigid limit equilibrium theory, Bishop method and Morgenstern price method are used to analyze the influence degree of continuous heavy rainfall on the stability of high slope of ore pile and its change process with time. The analysis results show that with the increase of rainfall intensity and duration, the minimum anti sliding safety factor calculated by the triangular transient pore pressure distribution function method to simulate the seepage field is lower and the reduction rate is faster, which has a great impact on the stability of ore pile slope, and local or whole landslide may occur.