抚顺西露天矿开挖作用下边坡变形破坏滑动规律研究  

Study on the Slope Deformation and Failure Sliding Law under the Excavation of Fushun West Open-pit Mine

作　　者：郭子钰 刘向峰[1] 王来贵[1] 王勇 GUO Ziyu;LIU Xiangfeng;WANG Laigui;WANG Yong(School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China;China Coal Technology and Engineering Group Shenyang Engineering Company,Shenyang 110015,China)

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [2]中煤科工集团沈阳设计研究院有限公司,辽宁沈阳110015

出　　处：《金属矿山》2021年第12期190-199,共10页Metal Mine

基　　金：国家重点研发计划重点专项项目(编号:2017YFC1503102,2017YFC1503101);中国煤炭科工集团有限公司科技创新创业资金专项重点项目(编号:wk004-2019)。

摘　　要：为了研究露天煤矿边坡变形、破坏、滑动全过程,以抚顺西露天矿为研究对象,应用CDEM方法模拟开挖条件下抚顺西露天矿南帮坡顶、坡中、坡底的变形、破坏、滑动规律,探讨开挖深度对南帮边坡的影响情况。结果表明:变形阶段,边坡整体向下压密变形,积蓄变形量;满足破坏条件,进入破坏阶段,边坡顶部受拉,萌生拉张裂纹,裂纹沿着弱层面扩展,坡顶和坡底裂纹逐渐连接,最终贯穿边坡模型;滑动阶段,裂纹上下贯通形成滑体轮廓,滑体沿着裂纹面发生失稳滑动,最后在坡底剪出。随着开挖深度增加,南帮弱层出露越多,边坡的临空区域增多,引发滑坡几率越高,当开挖深度达到标高为-164 m后,南帮边坡出现大规模滑坡,且滑坡模式为滑移—剪切式,研究成果为抚顺西露天矿边坡治理与防护提供数据参考。In order to study the whole process of deformation,failure and slippage of open-pit coal mine,the thesistakes Fushun West Open-pit Mine as the research object and uses CDEM method to simulate the deformation,failure andslippage of the south slope top,middle and bottom of Fushun West Open-pit Mine under excavation conditions.Discuss theinfluence of the excavation depth on the southern slope.The results show that:in the deformation stage,the slope is com-pressed downward as a whole,and the amount of deformation is accumulated;when the failure conditions are met,the fail-ure stage is entered.The cracks are expanded along the weak plane,the top and bottom cracks of the slope are graduallyconnected,and finally penetrate the slope model;in the sliding stage,the cracks penetrate up and down to form the contourof the sliding body,and the sliding body slides instably along the crack surface,and finally on the slope cut out from thebottom.As the excavation depth increases,the weaker layers of the southern bank are exposed,and the empty area of theslope increases,which leads to a higher probability of landslides.When the excavation depth reaches the elevation of-164 m,a large-scale landslide appears on the southern bank slope.And the landslide model is slip-shear type,and the researchresults provide data reference for Fushun West Open-pit Mine management and protection.

关 键 词：CDEM方法 变形 破坏 滑动 开挖 裂纹扩展 

分 类 号：TD824.7[矿业工程—煤矿开采]