某加高扩容尾矿库三维静力敏感性及地震反应数值分析

为验证某复杂地质条件下尾矿库加高扩容设计方案的合理性，采用非线性有限元程序建立了初期坝、堆积坝以及坝基的三维有限元模型，首先分析了当堆积坝各料区均采用设计参数时，坝体在自重及上游沉积滩水压力作用下的静力位移、应力和应力水平，然后考虑到实际排矿堆积过程中存在的不确定性，对各层尾砂的主要变形模量进行了敏感性分析，最后采用动力时程分析法对坝体进行动力稳定性分析。结果表明，数值模拟结果符合工程实际，工程加高扩容设计方案较为合理，坝体不会出现因地震作用所导致的水平或垂直向裂缝以及沉积池水漫顶情况。研究成果可为设计及施工方案提供一定的理论依据。

Three dimensional static sensitivity and seismic response numerical analysis of a tailings pond with increased storage capacity

To verify the rationality of the design scheme of heightening and capacity expansion of tailings pond in a complex geological condition, the three-dimensional finite element models of an initial dam, accumulation dam and dam foundation are established by using the nonlinear finite element program. Firstly, the static displacement, stress, and stress level of the dam body under the action of self weight and upstream sedimentary beach water pressure are analyzed when the design parameters are adopted in each material area of the accumulation dam, and then the uncertainty in the actual ore discharge and accumulation process is considered, the sensitivity analysis of the main deformation modulus of tailing sand in each layer is carried out. Finally, the dynamic stability of the dam is analyzed by using the dynamic time history analysis method. The results show that the numerical simulation results are in line with the engineering practice, the engineering heightening and capacity expansion design scheme is more reasonable, and there will be no horizontal or vertical cracks in the dam body and overtopping of sedimentary pool water caused by the earthquake. The research results can provide a certain theoretical basis for the design and construction scheme.