基于Slide的某露天矿边坡整治及其稳定分析

Slope Regulation and Stability Analysis of an Open-pit Mine Based on the Slide Software

为评价某露天矿南部边坡的安全性、确定科学合理的露天边坡参数,针对该边坡岩体工程地质特征、边坡布置情况及其破坏模式等,借助Slide二维边坡计算软件,选用瑞典圆弧法和简化Bishop法确定其边坡安全系数,判断边坡稳定性程度.考虑边坡失稳的主要影响因素,并结合该矿矿体赋存及开采条件,提出安全可靠又符合实际的边坡优化及日常管理维护方案.按照优化结果,南部边坡经整治加固后,既保证了安全生产又节省了剥离成本,达到了预期目标.研究表明,采用瑞典圆弧法和简化Bishop法计算得到的稳定性系数较为合理和可靠,对存在圆弧滑裂面的此类边坡有一定的适用性.

In order to evaluate the safety of southern slope of an open-pit mine and determine the rational open-pit slope parameters, Sweden slipeircle method and simplified Bishop method are selected in view of the engineering geological characteristics, the slope layout and failure modes, etc. Then the slope safety factors are determined and the degree of slope stability is obtained, with Slide simulation software. In consideration of the main influential factors of slope instability and the occurrence of ore bodies and mining conditions, the reliable and practical slope optimization and daily management and maintenance scheme are proposed. According to the optimization results, the expected target is achieved with the stripping cost saved and mining safety guaranteed after reinforcement of the southern slope. The study shows both Sweden slipeirele method and simplified Bishop method are suitable for mines with circular slip surfaces and the safety factors obtained is reasonable and reliable.