某中线式尾矿坝抗震稳定性时程分析  

Time History Analysis of Seismic Stability of a Centerline Tailings Dam

作　　者：马艳晶[1] MA Yanjing

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《中国矿山工程》2022年第3期73-77,共5页China Mine Engineering

摘　　要：在尾矿坝抗震分析过程中,当采用动力有限元方法进行坝坡稳定性计算时,尚无评判标准和依据,参考水利工程中土石坝抗震稳定分析常用的方法,提出尾矿坝抗震稳定时程分析时的判断标准,即安全系数小于1.0的累计时间小于2 s。通过对某中线式尾矿坝进行计算分析,在三条地震波作用下,同时计入水平向地震动和竖向地震动作用时,其坝坡抗滑稳定安全系数小于1.0的累计时间分别为0.64 s、0.52 s、0.22 s,可判定该尾矿坝满足地震稳定性要求。所采用的分析方法可为类似尾矿坝工程抗震稳定计算提供一定的参考。In the process of seismic analysis of tailings dam, when dynamic finite element method is used for stability calculation of a dam slope, there is no evaluation standard and basis. By referring to the commonly used method for seismic stability analysis of earth-rock dam in hydraulic engineering, the judgment criteria is proposed for time history analysis of seismic stability of tailings dam, namely the cumulative time with safety factor below 1.0 is less than 2 s. Through calculation and analysis of a centerline tailings dam, under the action of three seismic waves with horizontal and vertical ground motion taken into account at the same time, when the cumulative time of the dam slope’s anti-sliding stability safety factor of less than 1.0 is respectively 0.64 s, 0.52 s and 0.22 s, it can be determined that the tailings dam meets the requirement of seismic stability. The analysis method adopted can provide a certain reference for the seismic stability calculation of similar tailings dam projects.

关 键 词：尾矿坝 中线式尾矿筑坝法 抗震稳定性 时程分析 

分 类 号：TD989[矿业工程—选矿]