露天矿不同弱层置换参数下的边坡稳定性研究  

Study on slope stability under different weak layer replacement parameters in open-pit mine

作　　者：涂立啸 田涯 王知乐 周伟[2,3] 才庆祥[1] 陆翔[1,2] TU Lixiao;TIAN Ya;WANG Zhile;ZHOU Wei;CAI Qingxiang;LU Xiang(School of Mines,China University of Mining and Technology,Xuzhou 221116,China;High-Tech Research Center for Open Pit Mines,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]中国矿业大学露天矿山高新技术研究中心,江苏徐州221116 [3]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《煤矿安全》2023年第7期214-220,共7页Safety in Coal Mines

摘　　要：提高边坡稳定性是保障露天煤矿安全作业,提高资源回收率的重要途径。通过毕肖普分析法,开展了置换层边坡稳定系数表达式的推导,结合Geo-Slope数值模拟对推导公式的验证,分析了置换层深度与高度对边坡稳定性系数的影响。研究表明:置换层与滑移面没有接触前和接触部分不变后,置换深度对边坡稳定性系数影响不明显,置换深度支持置换层与滑移面有接触时,边坡稳定性系数增大;置换层与滑移面无接触前,置换高度对边坡稳定性系数影响不明显,置换层与滑移面存在接触后,置换高度与边坡稳定性系数大小呈正相关。Improving slope stability is one of the important ways to ensure the safe operation of open pit coal mines and improve the resource recovery rate.Through Bishop's analysis,the derivation of the expression of slope stability coefficient of replacement layer was carried out,and the influence of depth and height of replacement layer on slope stability coefficient was analyzed by combining Geo-Slope numerical simulation to verify the derivation.The study shows that:the influence of the replacement depth on the slope stability coefficient is not obvious before the contact between the replacement layer and the slip surface and after the contact part is unchanged,and the slope stability coefficient increases when the replacement depth supports the contact between the replacement layer and the slip surface;the influence of the replacement height on the slope stability coefficient is not obvious before the contact between the replacement layer and the slip surface before the contact between the replacement layer and the slip surface,the effect of the replacement height on the slope stability coefficient is not obvious,and after the contact between the replacement layer and the slip surface exists,the replacement height and the slope stability coefficient are positively related.

关 键 词：露天矿 边坡工程 置换层 边坡稳定性 简化BISHOP法 

分 类 号：TD824.7[矿业工程—煤矿开采]