基于流固耦合作用的某尾矿坝渗流稳定性分析

尾矿坝是矿山重要设施之一，其内部含有大量的水和尾矿，一旦失稳造成的损失不可估量。尾矿坝失稳有众多因素影响，但是坝内浸润线是最活跃的影响因素。本文基于流固耦合理论，建立某尾矿坝有限元计算模型，考虑坝内排水井的存在。模拟坝内不同工况下浸润线分布，对其静力稳定性及流固耦合作用下尾矿坝应力应变场进行分析，并将浸润线模拟位置与实际监测结果进行对比。揭示库内不同工况下浸润线变化规律以及与坝体稳定性之间的关系，并分析评价不同工况下尾矿坝的稳定性。最后，将渗流场与应力场进行流固耦合，模拟出365 d坝内应力位移分布，为尾矿坝施工及安全运行提供可靠的依据及技术支持。

Analysis of Seepage Stability of a Tailings Dam Based on Fluid-solid Coupling Effect

The tailings dam is one of the important mining facilities, and it will cause incalculable losses in case of loss of instability since it contains huge volumes of water and tailings inside. Based on the fluid-solid coupling theory, a finite element calculation model for tailings dams is established while taking into account of the drainage wells in the dam. The distribution of the saturation lines is simulated under different working conditions in the dam. The stress and strain fields of the tailings dam are analyzed under the static stability and fluid-solid coupling. Moreover, the simulated position of the saturation line is compared with the monitoring results. The relationship between the changing rules of the saturation lines the dam stability is also illustrated with the stability of the tailings dam assessed under different working conditions. Finally, fluid-solid coupling of the seepage field and the stress field is carried out to simulate the stress displacement distribution within the dam for 365 days, which provides a reliable basis and technical support for the construction and safety operation of the tailings dam.