云南某铅锌露天矿山排土场边坡稳定性分析

Analysis of the Waste Dump Slope of a Lead-Zinc Open-pit Mine in Yunnan

排土场作为矿山废土石的收容所,其稳定性设计和分析至关重要,直接关系到排土场的正常运营。以云南某铅锌露天矿山排土场为例,根据工程地质情况,对该排土场进行了堆排设计,然后采用有限差分程序FLAC2D和极限平衡法对该排土场的堆排设计在天然、地震、降雨3种工况条件下进行稳定性计算。通过计算模拟结果表明:排土场边坡稳定性在3种不同工况下满足规范安全等级要求,该排土场边坡处于稳定状态,说明该排土场的堆排设计方案具有合理性、安全性,可为废土石体堆排后续实施提供指导依据,同时做好对该排土场边坡的变形监测。

Waste dumps are the storage of mines’waste,and the design and analysis of the stability linking to their normal services is critical.Based on the waste dump of a lead-zinc open-pit mine in Yunnan,the stockpiling design is carried out according to its engineering geology,as well as the stability of the designed stockpiling in the natural,earthquake and rainfall conditions are measured with finite difference program FLAC2D and limit equilibrium method.The results from the calculation modeling show that the stability in the 3 conditions meet the security requirements.The slope stability prove that the design is proper,safe and guiding to the following practice of the waste piling.Meanwhile,the deformation of the waste dump slope should be monitored.