渗流-应力耦合作用下尾矿库稳定性的三维数值分析

发布时间：2018-01-10 09:42

本文关键词：渗流-应力耦合作用下尾矿库稳定性的三维数值分析　出处：《安全与环境学报》2016年04期 　论文类型：期刊论文

【摘要】：尾矿坝稳定性分析对尾矿库运行具有重要的意义,数值模型的建立是尾矿库稳定性分析的关键因素之一。根据某尾矿库工程实际,利用3Dmine与Midas/GTS软件建立了三维数值模型,基于渗流-应力耦合机理,研究了干滩长度对尾矿库坝体稳定性的影响机理。结果表明:1)渗流作用对尾矿库稳定性影响较大;2)在渗流-应力耦合作用下,随干滩长度减小,尾矿坝孔隙水压力逐渐增大,而整体位移量逐渐减小,最大位移区域从尾黏土层逐渐扩大到尾粉土层,尾矿库安全系数逐渐减小;3)得出了适用于该尾矿库的干滩长度与安全系数之间的函数关系。数值模拟结果显示,洪水工况下尾矿库安全系数为1.112 5,小于《尾矿库安全技术规程》规定的二等坝安全系数1.15。因此,应加强尾矿库的安全管理,以保障尾矿库后期的安全运行。
[Abstract]:The analysis is of great significance to the operation stability of tailings dam, a numerical model is one of key factors in stability analysis of tailing dam. According to a tailings project, using 3Dmine and Midas/GTS software to establish a three-dimensional numerical model of seepage stress coupling mechanism based on the study of mechanism of dry beach length of tailing dam stability. The results show that: 1) seepage has great influence on the stability of the tailings; 2) in the seepage stress coupling, with the length of dry beach dam decreases, pore water pressure gradually increased, while the whole displacement decreases and the maximum displacement from the tail region gradually expanded to the tail clay silt layer. The safety coefficient of tailings decreased gradually; 3) the function relationship between the applied to the tailings dry beach length and safety coefficient. The numerical simulation results show that under the condition of flood safety coefficient of tailings is 1. 1125, less than the two equal dam safety factor 1.15. stipulated in the "safety regulations for tailings reservoir". Therefore, safety management of tailings reservoir should be strengthened in order to ensure the safe operation of the tailings reservoir in the later stage.

【作者单位】：中南大学资源与安全工程学院;
【分类号】：TD926.4
【正文快照】： 0引言在影响尾矿坝安全稳定性的诸多因素中,尾矿坝内渗流状态是重要因素之一,很多尾矿坝的溃坝、开裂等事故都和坝体渗流密不可分。许多学者开展了尾矿库渗流场方面的研究,并取得了丰富的成果[1-6]。尾矿坝内的渗流过程是个复杂的多场耦合问题,已有许多学者在渗流稳定性问题的

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