To address the problem of seepage failure that affects the stability of the fine-grained tailings dam, two kinds of prevention and treatment measures were proposed involving composite flocculants and composite curing agents. The orthogonal test was conducted to determine the optimal ratio flocculant (ORF) and the optimal ratio curing agent (ORCG). Then, numerical models were established to evaluate the effects of the prevention and treatment measures on the seepage and stability of the tailings dam. The results show that the mechanical properties and microstructure of the tailings are significantly improved by adding the ORF and ORCG. Furthermore, numerical studies suggest that the addition of the ORF and the ORCG to the tailings improves the factor of safety of the tailings dam, but the addition of the ORCG also increases the height of the phreatic line. It is also speculated that the addition of the ORF can prevent the formation of through failure zone in the tailings dam. Therefore, the optimal measure to prevent seepage failure in the tailings dam is adding an appropriate amount of the ORF, as it reduces the height of the dam’s phreatic line and lowers the risk of seepage failure. The typical area susceptible to seepage failure can be treated by adding the ORCG. However, it is important to ensure adequate drainage of the area and to maintain the phreatic line at a reasonable buried depth.

针对影响细粒尾矿坝稳定性的渗流破坏问题，提出了复合絮凝剂和复合固化剂两种防治措施。通过正交试验确定最佳配比絮凝剂（ORF）和最佳配比固化剂（ORCG）。然后建立数值模型，评价防治措施对尾矿坝渗流及稳定性的影响。结果表明，添加ORF和ORCG后尾矿的力学性能和微观结构得到显着改善。此外，数值研究表明，尾矿中添加ORF和ORCG提高了尾矿坝的安全系数，但ORCG的添加也增加了潜水线的高度。还推测添加ORF可以防止尾矿坝中贯通破坏区的形成。因此，尾矿坝防止渗流破坏的最佳措施是添加适量的ORF，因为它可以降低尾矿坝的潜水线高度，降低渗流破坏的风险。容易发生渗漏破坏的典型区域可以通过添加 ORCG 进行处理。然而，重要的是要确保该区域有足够的排水并将潜水线保持在合理的埋藏深度。