不同开挖状态下高陡边坡破坏特征及稳定性研究  

Failure Characteristics and Stability of High and Steep Slope Under Different Excavation Conditions

作　　者：卢栋 富国凯 董贤阳 刘得昌 庄贤鹏 侯钦宽 LU Dong;FU Guokai;DONG Xianyang;LIU Dechang;ZHUANG Xianpeng;HOU Qinkuan(Xinjiang Jinchuan Mining Industry Co.,Ltd.,Ili 835001,Xinjiang,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]新疆金川矿业有限公司,新疆伊犁835001 [2]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《矿冶工程》2024年第6期1-5,15,共6页Mining and Metallurgical Engineering

基　　金：中国—中东欧国家高校联合教育项目(2021111);国家自然科学基金(U1602232,52374157);辽宁省重点科技计划(2019JH2-10100035);中央高校基本科研业务专项资金(N2301005,N2301006)。

摘　　要：为了探究边坡整体稳定性受其局部破坏前后状态及开挖方法的影响,以新疆金川京希-巴拉克采区北侧边坡工程为研究对象,采用离散元法对边坡局部破坏特征和不同开挖状态下的边坡稳定性进行研究。结果表明:最大主应力的分布对边坡稳定性影响很大,边坡安全系数在边坡破坏前、中、后期表现为先减小后增大的变化趋势;随着台阶开挖级数增加,边坡安全系数表现为先增大后减小的趋势,当开挖台阶级数大于1时,边坡整体安全系数均满足要求;当坡角小于等于60°时,边坡整体安全系数满足要求,适宜的坡角为60°。In order to explore the overall stability of slope before and after local failure,as well as the effect of excavation method on slope stability,the slope project on the north side of Jingxi-Barak mining area in Jinchuan of Xinjiang was taken to study local failure characteristics of slope and slope stability under different excavation state by adopting distinct element method.It is found that the distribution of the maximum main stress has a great impact on the slope stability,and the factor of safety for slope stability tends to decrease first and then increase from the stage before local failure to the stage after failure;with more excavated benches,the factor of safety for slope stability tends to increase first and then decrease;with the excavated benches more than 1,the overall factor of safety of the slope meets the requirements;with slope angle less than or equal to 60°,the overall factor of safety also meets the requirements,and the suitable slope angle is 60°.

关 键 词：高陡边坡 露天边坡 边坡稳定性 安全系数 离散元法 台阶开挖 台阶坡角 破坏特征 

分 类 号：TD854[矿业工程—金属矿开采]