| 马冲.高寒高海拔地区降雨入渗对排土场边坡稳定性影响研究[J].矿产勘查,2024,15(S1):28-35 |
| 高寒高海拔地区降雨入渗对排土场边坡稳定性影响研究 |
| Study on the influence of rainfall infiltration on the stability of dump slope in high cold and high altitude area |
| 投稿时间：2024-04-01 修订日期：2024-05-10 |
| DOI：10.20008/j.kckc.2024s1005 |
| 中文关键词: 高寒高海拔 降雨 渗流 排土场 边坡稳定性 |
| 英文关键词: high cold and high altitude rainfall seepage waste dump slope stability |
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| 中文摘要: |
| 为分析高寒高海拔地区降雨条件下渗流作用对露天矿山排土场边坡稳定性影响，本文选取西藏某露天矿山排土场为研究对象，通过室内实验获得岩土体的渗透系数和物理力学参数，采用数值模拟的方式，利用极限平衡计算方法，计算排土场边坡在降雨时长为24 h，降雨量分别为20 mm/d、30 mm/d和40 mm/d条件下排土场的安全系数变化特征，对该矿排土场边坡稳定性进行分析计算。研究结果表明：水是影响排土场稳定的重要因素之一，降雨入渗降低排土场内部软弱结构面的强度，造成排土场边坡不稳定，安全系数随降雨量增大而减小，降雨量达到一定程度之后，岩土体充水接近饱和，边坡易发生破坏。研究成果可为高寒高海拔地区排土场边坡稳定性工程提供参考。 |
| 英文摘要: |
| In order to analyze the influence of seepage action on the stability of open-pit pit slope under rainfall conditions in high cold and high altitude areas， an open-pit pit in Xizang Province was selected as the research object， and the permeability coefficient and physical and mechanical parameters of rock and soil mass were obtained through indoor experiments. Numerical simulation was adopted and the limit equilibrium calculation method was used to calculate the rainfall duration of the dump slope for 24 h. The variation characteristics of safety factor of the dump under the condition of rainfall of 20 mm/d， 30 mm/d and 40 mm/d respectively， the stability of the dump slope was analyzed and calculated. The research results show that water is one of the important factors affecting the stability of the dump. Rainfall infiltration reduces the strength of the weak structural plane inside the dump， resulting in the instability of the dump slope， and the safety factor decreases with the increase of rainfall. After the rainfall reaches a certain level， the rock and soil body is nearly saturated with water， and the slope is prone to failure. The research results can provide reference for similar projects. |
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