某磷石膏尾矿库堆积坝渗透稳定性分析.pdfVIP

Journal of Engineering Geology 工程地质学报 1004-9 5/2016/24(4)-0 1-07 DOI ：10.13544/ki.jeg.2016.04.023 某磷石膏尾矿库堆积坝渗透稳定性分析 褚 学 伟 许 模 ® 王中美@ ( ①成都理工大学地质灾害防治与地质环境保护国家重点实验室（成都理工大学） 成 都 610059) (②贵州大学资源与环境工程学院贵阳550025) 摘要随着尾矿库堆积坝高度的增加，库内的地下水渗流场将发生改变,当尾矿堆积坝处的实际水力梯度大于临界水力梯 度时,尾矿库堆积坝将产生渗透变形或失稳破坏。为了预测某已建磷石膏尾矿库堆积坝的渗透稳定性,本文运用地下水位计 水位恢复试验去确定磷石膏尾矿渗透系数并计算水力梯度，同时采用Ge〇-smd1〇软件中的SEEP/W模块分析磷石膏堆积坝在 不同工况下的渗透稳定性。计算和分析结果表明当堆积坝处于945m堆积高程，在无干滩和100m干滩情况下，实际水力梯度 分别为〇. 784和 0. 583; 当堆积坝处于960m堆积高程，无干滩情况下，实际水力梯度为0. 692,在以上两种情况下，堆积坝渗 出点高程高于初始坝高程，堆积坝将出现流土变形，坝体处于不稳定状态。当堆积坝处于960m堆积高程 100m干滩时，堆积 坝上无渗出点,堆积坝处于稳定状态。分析研究结果对该尾矿库的安全运行和维护管理提供技术依据，同时为同类型尾矿库 堆积坝渗透稳定性评价提供参考。 关键词尾矿库堆积坝临界水力梯度渗透稳定性分析 中图分类号:P641.2 文献标识码：A STABILITY ANALYSIS OF SEEPAGE ON THE ACCUMULATION DAM OF A PHOSPHOGYPSUM TAILINGS CHU Xuewei①② XU Mo® WANG Zhongmei® ((X)State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059) ( (^College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025) Abstract With the increase of tailings dam height, the groundwater seepage field will change. When the actual hydraulic gradient at the tailings dam is greater than the critical hydraulic gradient, the tailings dam will produce seepage deformation or instability damage. In order to predict the seepage stability of a phosphogypsum tailings dam, the seepage coefficient was determined by using the groundwater level gauge to resume testing, and the hydraulic gradient were calculated. At the same time, the SEEP/W module of Geo-studio was used to analyze the seepage stability of the phosphorus gypsum accumulation dam under different conditions. According calculation and analysis results, it was found that when the accumulation dam was in 945m altitude, in