降雨对排土场边坡渗流及稳定性的影响

以降雨时期排土场的稳定性为研究对象，结合唐山某排土场堆积特征和地区气象条件，基于Geo-studio软件中SLOPE/W、SEEP/W等多个模块的不同算法，估算理论派生土体的土水特征曲线和渗透系数函数，计算了矿山排土场边坡在天然状态时的最小安全稳定性系数，分析了不同降雨状态下排土场边坡渗流特征。研究结果表明：一定的降雨强度下，随着降雨时间的增长，排土场坡体内的浸水面深度逐渐增加，孔隙水压力增大，安全稳定性系数在逐渐降低，边坡将向不稳定状态演变；降雨强度增大，会使边坡稳定性系数降低的速度增加，随着降雨强度和降雨时间的持续增加，边坡终将向不稳定状态演变。

Influence of Rainfall on Permeability and Stability of the Dump Slope

Dump stability during rainfall period is taken as research object，combined with accumulation characteristics and meteorological conditions of a dump of Tangshan，based on the different algorithms of multiple modules，such as SLOPE/W，SEEP/W of Geo-studio software，the soil water characteristic curve and permeability coefficient function are estimatedThe minimum safe stability coefficient of the mine dump slope in the natural state is calculatedVariation characteristics of Seepage and stability of the dump slope in different rainfall condition are analyzedThe results show that within certain rainfall intensity，immersed surface decreases gradually with the increase of rainfall duration，and pore water pressure is increasingThe coefficient of safety stability is gradually reducedThe slope gradually turns into instabilityThe increase of rainfall intensity will increase reduction rate of slope stability coefficient，with the increase of rainfall intensity and duration，the slope will eventually evolve into an unstable state