长期运行尾矿库的排渗系统渗透特性的差异化反演分析

排渗系统是尾矿库的重要组成部分之一,对尾矿库的安全稳定有着重大影响。针对长期运行的上游式尾矿库排渗系统的渗透特性反演分析问题,考虑到系统不同位置排渗能力存在差异,提出了渗透特性差异化假定的反演分析。选取某已运行多年的上游式尾矿库,结合工程现状,建立三维有限元反演分析模型,基于可变容差法对排渗系统的渗透特性进行差异化反演分析,研究了尾矿库渗流场分布规律,并对反演分析结果的合理性及准确性进行了评价。结果表明:经差异化反演分析后,计算得到的浸润面数据更符合实际情况,反演成果可为尾矿库后期加高设计提供合理依据。

Differential inversion analysis of permeability characteristics of drainage system in long-term tailings pond

The drainage system is one of the important components of the tailings pond, which has a significant impact on the safety and stability of the tailings pond. Aiming at the problem of the inversion analysis of the permeability characteristics of the upstream tailings pond drainage system in long-term operation, considering the difference of the drainage capacity of the system at different locations, the inversion analysis of the differential assumption of the permeability characteristics is proposed. A upstream tailing pond that has been running for many years is selected. Combined with the engineering status, a three-dimensional finite element inversion analysis model is established. Based on the variable tolerance method, the differential inversion analysis of the permeability characteristics of the drainage system is carried out. The distribution law of the seepage field of the tailing pond is studied, and the rationality and accuracy of the inversion analysis results are evaluated. The results show that after the differential inversion analysis, the calculated infiltration surface data are more in line with the actual situation, and the inversion results can provide a reasonable basis for the later heightening design of the tailings pond.