基于抗剪强度折减系数法的某露天铀矿边坡角优化研究  

Optimization of Slope Angle of an Open-pit Uranium Mine Based on Strength Reduction Method

作　　者：沈玉众 郝志华 陈勇 李宁 SHEN Yuzhong;HAO Zhihua;CHEN Yong;LI Ning(The Fourth Research and Design Engineering Corporation,CNNC,Shijiazhuang 050021,China)

机构地区：[1]中核第四研究设计工程有限公司,河北石家庄050021

出　　处：《铀矿冶》2021年第2期102-107,共6页Uranium Mining and Metallurgy

摘　　要：以某铀矿为工程背景,基于抗剪强度折减系数法,采用FLAC 3D数值计算软件建立了不同边坡角度的边坡数值计算模型,分析了边坡角度对铀矿边坡稳定性的影响,重点研究了边坡滑移面位置、边坡水平位移和安全系数的变化规律。研究结果表明:边坡呈现从坡顶至坡底的圆弧形滑动,最大水平位移为11.5 cm;随着边坡角的增加,安全系数呈现近似线性减小的变化趋势,边坡角从35°增加至40°时,边坡安全系数由1.37减小至1.22,降幅为10.9%。Based on the engineering background of a uranium mine,FLAC 3D numerical calculation software is used to establish slope numerical calculation models with different slope angles,analyze the influence of slope angles on the stability of the uranium mine slope,and emphatically analyze the variation law of slope sliding surface position,slope horizontal displacement and safety factor.The results show that the sliding surface changes little when the landslide occurs,and the slope slides from the top to the bottom in a circular arc with the increase of the slope angle.However,the increase of slope angle has the greatest influence on the horizontal displacement of the middle and lower part of the slope,the maximum horizontal displacement is 11.5 cm.At the same time,as the slope angle increases,the slope safety factor approximately shows a linear decreasing trend.When the slope angle increases from 35°to 40°,the slope safety factor decreases from 1.37 to 1.22,with a decrease of 10.9%.

关 键 词：强度折减系数法 边坡角 边坡稳定性分析 数值计算 安全系数 

分 类 号：TD325[矿业工程—矿井建设] TD868