基于赤平投影-强度折减法的露天矿边坡稳定性研究

露天矿山边坡稳定性是矿山安全生产的重要组成部分。基于赤平投影法对某矿山终了边坡进行稳定性分析,分析表明边坡在动载的作用下存在失稳的可能;故进一步基于强度折减法对边坡进行数值模拟。模拟结果显示:在爆破工况下,选取的剖面所在边坡安全系数分别为2.16和2.54,均大于允许安全系数1.18,地震+暴雨工况下安全系数分别为1.34和1.52,也大于允许安全系数1.18,即终了边坡处于稳定状态。但由于地震+暴雨工况下安全系数与允许安全系数较为接近,因此需在矿山生产过程中密切关注边坡的稳定性情况。

Research on slope stability of open-pit mine based on stereographic projection-strength reduction method

The slope stability of open-pit mines is an important part of safe production in mines. This article is based on the stereographic projection method to analyze the stability of the end slope of an open-pit limestone mine, the analysis shows that the slope may be unstable under the action of dynamic load; Therefore, the slope is further numerically simulated based on the strength reduction method. The simulation results show that under the blasting conditions, the safety factors of the slopes where the selected sections are located are 2.16 and 2.54 respectively, which are both greater than the allowable safety factor of 1.18, The safety factors under earthquake and rainstorm conditions are 1.34 and 1.52 respectively, which are also greater than the allowable safety factor of 1.18, that is, the slope is in a stable state. However, due to the fact that the safety factor and the allowable safety factor under earthquake and rainstorm conditions are relatively close, it is necessary to pay close attention to the stability of the slope during the mine production process.