地震荷载影响下露天矿山高边坡最终边坡角优化研究  

Study on the optimization of the final high slope in an open pit mine with the influence of seismic load

作　　者：周成豪 张耀平[1] 柯圣安 ZHOU Chenghao;ZHANG Yaoping;KE Shengan(School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《化工矿物与加工》2020年第11期1-4,共4页Industrial Minerals & Processing

摘　　要：以国内某露天矿山高边坡为工程背景,利用数值模拟和极限平衡法对该矿区原设计最终边坡的稳定性进行评价,考虑地震荷载对边坡稳定性的影响,采用Slide软件对边坡稳定性进行计算,结果表明:在考虑地震荷载影响的条件下,边坡的安全系数约为1.45,大于边坡允许安全系数1.25,说明最终边坡角尚有一定的优化空间。利用FLAC3D软件,引入强度应力比对最终边坡角进行优化分析,结果表明:通过改变台阶坡面角的方式对-170m以上的岩体较为稳定的“优势区域”边坡角进行优化后,最终边坡角可由原设计的36°增大至42°,在满足安全开采的同时提高了经济效益。In this paper,based on the engineering practice of an open-pit mine with high slope in China,the stability of the final slope originally designed for the mine was assessed using numerical simulation combined with the limit equilibrium method in consideration of the influence of seismic load on the slope stability to be calculated by means of Slide software.The results show that with the influence of seismic load,the safety factor of the slope was about 1.45 which was higher than the minimum requirement of 1.25,indicating the availability of optimizing the final slope.Therefore,the optimization of final slope was studied by introducing the intensity-stress ratio and using FLAC3Dsoftware,The results from study indicated that the final slope of rock mass of level above-170min the stable"priority area"could be improved from 36°to 42°by changing the slope angle of benches,which satisfied the requirements for mining safety and improved the economic performance.

关 键 词：高边坡 极限平衡法 强度应力比 边坡稳定性 最终边坡角优化 边坡安全系数 

分 类 号：TD876.3[矿业工程—非金属矿开采]