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降雨入渗对尾矿坝渗流场和稳定性的影响

发表时间:2012-09-30  浏览量:1002  下载量:446
全部作者: 尹光志,王文松,张千贵,耿伟乐,李铭辉
作者单位: 重庆大学煤矿灾害动力学与控制国家重点实验室,资源及环境科学学院,复杂煤气层瓦斯抽采国家地方联合工程实验室
摘 要: 为探索雨水入渗对尾矿坝地下渗流场和稳定性的影响,以四川某铁矿拟建尾矿库为例,基于非饱和土力学理论,采用Slide软件对不同降雨强度下尾矿坝地下渗流场及坝体稳定性进行数值模拟分析和计算。结果显示:随着降雨强度增加,尾矿坝浸润线抬升,基质吸力作用减弱,坝体稳定性降低。当降雨强度达到历史最大值时,尾矿坝安全系数不符合国家规范规定,因此,应加设排渗设施,增强坝体排渗能力。研究成果可为该尾矿坝设计与施工提供指导,并为其他尾矿坝设计提供借鉴。
关 键 词: 矿山安全;采矿工程;尾矿坝;数值模拟;降雨;稳定性
Title: Effect of rainfall on seepage field and stability of tailings dam
Author: YIN Guangzhi, WANG Wensong, ZHANG Qiangui, GENG Weile, LI Minghui
Organization: State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Environmental Science, State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University
Abstract: The present paper focuses on the study of a case, a tailing dam from the iron industry located in Sichuan province, with the objective of gaining knowledge about the influence of rainfall infiltration on seepage field and stability of tailings dam. Based on the unsaturated soil mechanics theory, numerical simulation analysis of seepage field and calculation of stability with different rainfall intensities were performed by applying Slide program. The research results showed that the seepage line rises with the increase of rainfall intensity, while the effect of matric suction decreases and stability of dam reduces. The safety factor of tailings dam is lower than the value of national specification when the rainfall intensity reaches to the maximum in history. Therefore, drainage facilities should be built to enhance drainage capacity of dam. The research results can provide guidance for design and construction of tailings dam and afford positive and instructive references for other tailings dams.
Key words: mine safety; mining engineering; tailings dam; numerical simulation; rainfall; stability
发表期数: 2012年9月第18期
引用格式: 尹光志,王文松,张千贵,等. 降雨入渗对尾矿坝渗流场和稳定性的影响[J]. 中国科技论文在线精品论文,2012,5(18):1720-1727.
 
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