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金属矿山 ›› 2016, Vol. 45 ›› Issue (05): 173-177.

• 安全与环保 • 上一篇    下一篇

降雨对排土场边坡渗流及稳定性的影响

张亚宾1,2,陈超1,2,甘德清1,2   

  1. 1.华北理工大学矿业工程学院,河北 唐山 063009;2.河北省矿业开发与安全工程实验室,河北 唐山 063009
  • 出版日期:2016-05-13 发布日期:2016-08-18
  • 基金资助:

    基金项目 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)。

Influence of Rainfall on Permeability and Stability of the Dump Slope

Zhang Yabin1,2,Chen Chao1,2,Gan Deqing1,2   

  1. 1.North China University of Science and Technology,Tangshan 063009,China;2.Mining Development and Safety Technology Key Lab of Hebei Province,Tangshan 063009,China
  • Online:2016-05-13 Published:2016-08-18

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。

关键词: 排土场边坡, 稳定性, 降雨强度, 降雨时间

Abstract: 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

Key words: Dump slope, Stability, Rainfall intensity, Rainfall duration