某石墨露天矿边坡稳定性分析研究

Study on Slope Stability of a Graphite Open-pit Mine

为验证某石墨露天矿边坡参数选取的合理性,考虑到边坡稳定性具有随机性和模糊性的特点,选取了4个典型边坡剖面,基于简化Bishop法极限平衡理论,计算天然、爆破及地震3种工况条件下边坡最小安全系数,并与边坡稳定性综合评价模型评估结果进行对比。结果显示,4个边坡剖面在各工况条件下最小安全系数均大于允许值,边坡处于基本稳定状态;再通过博弈论—云模型综合评价模型分析,验证了边坡参数设计是合理的,能满足安全生产要求。

In order to verify the rationality of slope parameters selection in a graphite open-pit mine,considering the randomness and fuzziness of slope stability,four typical slope sections were selected.Based on the simplified Bishop method limit equilibrium theory,the minimum safety factor of slope under natural,blasting and seismic conditions was calculated,and the results were compared with the evaluation results of slope stability comprehensive evaluation model.The results show that the minimum safety factors of the four slope profiles are greater than the allowable values under various working conditions,and the slope is basically stable.Through the analysis of game theory-cloud model comprehensive evaluation model,it is verified that the slope parameter design is reasonable and can meet the requirements of safe production.