摘要
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。
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.
出处
《金属矿山》
CAS
北大核心
2016年第5期173-177,共5页
Metal Mine
基金
河北省高等学校科学技术研究重点项目(编号:ZD2014037)
河北省自然科学基金项目(编号:E2013209328)
关键词
排土场边坡
稳定性
降雨强度
降雨时间
Dump slope
Stability
Rainfall intensity
Rainfall duration
