摘要
露天矿软弱基底排土场边坡在降雨工况下,岩体的强度、黏聚力和内摩擦角受严重影响,且岩体受地表水和地下水的静力和动力作用,降雨严重影响软弱基底排土场边坡的稳定性。利用Geostudio软件Bishop法、Spencer法、Morgenstern-Price(M-P法)、Janbu法和Sarma法5种极限平衡条分法进行自然工况和降雨工况的二维排土场模型综合性数值模拟试验,通过AHP法对边坡稳定性安全系数进行评价分析。结果表明:工程设计方案在各工况下的安全系数均较大;降雨对边坡稳定性的影响显著,李屋排土场边坡稳定性安全系数随雨量增加而减小。研究方法为软弱基底边坡稳定性分析提供了一套较为成熟的范例。
Under the condition of rainfall,the strength,cohesion and internal friction angle of rock mass are affected.With the static and dynamic effects of surface water and groundwater,the slope stability of dump with weak basement in open-pit mine is seriously affected.Five limit equilibrium methods,including Bishop,Spencer,Morgenstern-Price(M-P),Janbu and Sarma of Geostudio software,were used to carry out comprehensive numerical simulation tests of two-dimensional dump models under natural and rainfall conditions.The safety factor of slope stability was evaluated by AHP.The results show that the safety factor of the design scheme is large under each working condition.The influence of rainfall on slope stability is significant,and the safety factor of slope in Liwu dump decreases with the increase of rainfall.The research results can provide a comprehensive research method for the stability analysis of slope with weak basement.
作者
陈光木
CHEN Guangmu(Guangdong Dabaoshan Mining Co.,Ltd.,Shaoguan,Guangdong 512127,China)
出处
《矿业研究与开发》
CAS
北大核心
2022年第12期56-62,共7页
Mining Research and Development
