抚顺西露天矿北帮“7·25”滑坡数值反演分析  

Numerical back analysis of 7·25 landslide on the north side of Fushun West Open-pit Mine

作　　者：樊赟赟[1] 刘孝龙 FAN Yunyun;LIU Xiaolong(School of Resource and Civil Engineering,Northeastern University,Shenyang 110004,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《煤矿安全》2022年第1期226-231,共6页Safety in Coal Mines

基　　金：国家科技支撑计划重点资助项目(2016YFC0801603,2017YFC1503101);国家自然科学基金资助项目(41201007);辽宁省重点科技资助项目(2019JH2-10100035)。

摘　　要：对由降雨触发的抚顺西露天矿北帮"7·25"滑坡进行了反演计算分析,所得到的边坡初始水位线、失稳时间和失稳滑动面均与实际情况相符,从而验证了计算和结果的正确与有效性;在此基础上研究了排水管失效及风化破碎带深度对边坡稳定性的影响。结果表明:排水管能有效降低地下水位线并提高边坡稳定性,一旦排水管失稳将会造成边坡安全度下降,在降雨条件下边坡可能会在更短的时间内失稳,因此应定期对排水管进行检修以保证其有效工作;而风化破碎带对边坡稳定性也有着较大的影响,在风化、卸荷等作用影响下风化破碎带深度可能是动态变化的,因而需要加强动态监测以保证边坡的安全稳定性。In this study,the back analysis of 7·25 landslide triggered by rainfall on the north side of Fushun West Open-pit Mine was carried out,and the obtained initial water level,failure time and failure sliding surface are all consistent with the actual situation,thus verifying the correctness and effectiveness of the calculation and results.On this basis,the influence of drainage pipe failure and depth of weathering fracture zone on slope stability was studied.The calculation results show that the drainage pipe can effectively reduce the underground water level and improve the slope stability.Once the drainage pipe enters in failure state,the slope safety will be decreased,and the slope may be unstable in a shorter time under the condition of rainfall.Therefore,a regular maintenance of drainage pipe is essential for its effective work.The weathering fracture zone also has a great influence on the slope stability.Under the influence of weathering and unloading,the depth of weathering fracture zone may change dynamically,so it is necessary to enhance dynamic monitoring to ensure the safety and stability of the slope.

关 键 词：抚顺西露天矿 边坡稳定 排水失效 风化破碎 反演分析 滑坡 

分 类 号：TD164.1[矿业工程—矿山地质测量]