红河某尾矿库坝体渗流稳定性分析

Seepage stability analysis of a tailings dam in Honghe

我国以往尾矿库技术不足,许多尾矿库存在设计不当的问题,潜在危险高。对此以云南红河某尾矿库为研究对象,通过现场勘查并结合室内土工试验与力学试验得到尾矿体渗透系数及力学参数,基于Geo-studio软件,构建尾矿库数值分析模型,研究尾矿库的渗流规律并对尾矿库坝体稳定性进行计算分析。对结果分析得出:尾矿库坝体在正常运行、洪水运行及特殊运行三种工况下,在坝坡表面浸润线均没有溢出,尾矿库坝体稳定,坝体内部不会造成流土、管涌等渗透破坏。采用两种稳定性计算方法对坝体进行静力稳定性分析并计算尾矿库坝体在三种工况下的稳定性安全系数,计算结果均满足规范,坝体稳定。

The previous technology of tailings pond in China is insufficient,and many tailings ponds have the problem of improper design and high potential danger.Taking a tailings pond in Honghe,Yunnan province as the research object,the numerical analysis model of tailings pond is constructed based on Geo-studio software through field investigation,combined with the permeability coefficient and mechanical parameters of tailings body obtained from indoor geotechnical test and mechanical experiment.The seepage law of tailings dam is studied,and the stability of tailings dam is calculated and analyzed.The results show that under three conditions of normal operation,flood operation and special operation,the seepage line on the dam slope surface does not overflow,the dam body of tailings pond is stable,and the seepage damage such as flowing soil and piping will not be caused inside the dam.Two methods are used to analyze the static stability of the dam body and calculate the stability safety coefficient of the dam body under three conditions.The results meet the specifications and the dam body is stable.