干堆式尾矿坝在多年累积降雨渗透条件下饱和线的解析解

IF 3.7 2区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2024-09-13 DOI:10.1007/s10064-024-03899-0
Qiang Li, Bize Wu, Sihai Yao, Mengfan Zhang, Hong Zhang
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引用次数: 0

摘要

饱和线是尾矿坝安全分析和防渗设计的基础。干堆尾矿坝饱和线形成的主要原因是多年降雨的累积渗透。以往的研究表明,在多年降雨的累积渗透作用下,干堆尾矿坝内部最终会形成一个相对稳定的渗流场,但目前缺乏对该渗流场的理论研究。本文旨在建立干堆尾矿坝在多年降雨累积下的饱和线理论解。在此基础上,利用达西定律和能量方程推导出干堆尾矿坝饱和线的渐渗微分方程。结合下游边界条件和降雨边界条件,得出了多年降雨条件下干堆尾矿坝饱和线的解析解。将分析解与数值模拟结果进行了对比,结果表明分析解与数值解十分吻合,最大差异为 5.17%。研究结果填补了多年降雨累积下干堆尾矿坝渗流场理论研究的空白,对丰富干堆尾矿坝渗流理论框架具有重要意义。它可作为干堆尾矿坝排水设计和边坡稳定性分析的基础,对设计更安全、更高效的采矿和建筑废物管理方法至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Analytical solution for the saturation line in dry-stack tailings dams under cumulative rainfall infiltration for many years

The saturation line serves as the foundation for the safety analysis and seepage control design of tailings dams. The primary cause of the saturation line formation in dry-stack tailings dams is the cumulative infiltration of years of rainfall. Previous studies have indicated that, under the cumulative infiltration of years of rainfall, a relatively stable seepage field eventually forms within dry-stack tailings dams, but there is a lack of theoretical research on this seepage field. This paper aims to establish a theoretical solution for the saturation line of dry-stack tailings dams under the accumulation of rainfall over many years. Based on this, the gradual seepage differential equations of the saturation line in dry-stack tailings dams were derived using Darcy's law and the energy equation. By incorporating downstream boundary conditions and rainfall boundary conditions, an analytical solution for the saturation line of dry-stack tailings dams under multi-years rainfall conditions was derived. A comparison between the analytical solution and numerical simulation results was conducted, indicating that the analytical solution closely matches the numerical solution, with a maximum difference of 5.17%. The findings of study can fill the gap in the theoretical study of seepage fields in dry-stack tailings dams under the accumulation of rainfall over many years, which is of significant importance in enriching the theoretical framework of seepage in dry tailings dams. It can serve as the basis for drainage design and slope stability analysis of dry-stack tailings dams, and is crucial for designing safer and more efficient waste management practices in mining and construction.

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来源期刊
Bulletin of Engineering Geology and the Environment
Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合
CiteScore
7.10
自引率
11.90%
发文量
445
审稿时长
4.1 months
期刊介绍: Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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