摘要
降雨是影响露天矿山失稳的主要因素。针对曼家寨东帮采场岩质边坡在降雨过后曾发生局部垮塌、出现坡面裂缝现象,结合饱和-非饱和渗流理论,利用Geo-studio中的SEEP/W模块对该边坡典型剖面进行降雨过程渗流规律分析。通过对降雨作用下孔隙水压力、暂态饱和区变化规律进行分析,得出如下结论:降雨条件下边坡表层区域受降雨影响严重,影响区域与影响程度受降雨时间与降雨强度共同控制;暂态饱和区是考虑降雨作用下边坡失稳的重要因素,持续的降雨作用会在边坡表面形成一定范围的暂态饱和区,降雨历时相同时,降雨强度越大形成暂态饱和区面积越大;降雨对坡脚处孔隙水压力及暂态饱和区的影响要大于坡顶区域,在进行相关边坡治理防护时要重点考虑坡脚位置。
Rainfall is a major factor affecting the stability of open pit mines In this paper,using the SEEP/W module in Geo studio,the typical section of the slope is simulated by using the saturated unsaturated seepage theory And the seepage law of the rainfall process is analyzed Based on the analysis of the variation of pore water pressure and transient saturation zone under rainfall,the following conclusions are drawn:Under the rainfall condition,the surface area of the slope is seriously affected by rainfall,and the influence area and influence degree are controlled by rainfall time and rainfall intensity The saturated area is an important factor considering the slope instability under the action of rainfall The continuous rainfall will form a certain range of transient saturation zone on the surface of the slope When the rainfall is the same,the larger the rainfall intensity is,the larger the area of the transient saturation zone is The effect of rainfall on the pore water pressure and transient saturation zone of the slope foot is larger than that of the slope area,and the position of the slope foot should be considered when the relevant slope protection is carried out
作者
魏佳潇
侯克鹏
WEI Jia-xiao;HOU Ke-peng(Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093,China)
出处
《矿冶》
CAS
2017年第6期5-11,共7页
Mining And Metallurgy
基金
云南省省级人培项目(KKSY201421016)
云南省教育厅科学研究基金重点项目(2014Z013)
关键词
岩质边坡
饱和-非饱和渗流
降雨入渗
rock slope
saturated unsaturated seepage
rainfall infiltration
