【摘要】 数值模拟已成为岩土工程稳定性分析计算的有效方法之一。应用FLAC3D建立了某铁矿尾矿库排砂现状的三维网格模型和流固耦合状态模型,选择Mohr-Coulomb模型描述尾砂的本构关系,并对该尾矿库在地震作用下的整体稳定性进行了分析。研究结果表明,该尾矿库总体稳定性良好,但在大烈度地震作用下局部有发生液化垮坝的危险;位移及速度最活跃的区域出现在尾矿库的坝底和坝顶边缘,应加强对这些区域的日常监测与管理;应用FLAC3D进行地震作用下尾矿库整体稳定分析是可行的,为分析尾矿库动力问题提供了范例。更多还原

【Abstract】 Numerical simulation is one of the effective methods to analyze the stability of geotechnical engineer.The finite difference software FLAC3D(Fast Lagrangian Analysis of Continua in 3 Dimensions) was applied to establish a 3D-mesh model and a fluid-solid model of an iron mine tailing pond,and the constitutive relation of tailings was described by the Mohr-Coulomb model to analyze the stability of tailing dam under earthquake.The results indicate that the tailing pond has been on the whole stable under strong earthquake,except some partial liquefaction which can possibly lead to breaking.And the most active area of tailing pond is in the edge of dam base or dam crest.The results also show that it is feasible to analyze the overall stability of tailing pond under earthquake action by means of FLAC3D,which provides an access to analyze some dynamic problems of tailing pond.更多还原