排渗系统不同失效程度下尾矿库三维渗流场数值模拟研究  

Numerical Simulation of Three-dimensional Seepage Field in Tailing Pond under Different Failure Degrees of Seepage Discharge System

作　　者：陶东良[1] 张国琛 吴蒙蒙 李海涛 刘渊源 徐力群[2] TAO Dongliang;ZHANG Guochen;WU Mengmeng;LI Haitao;LIU Yuanyuan;XU Liqun(CINF Engineering Corporation Limited,Changsha 410011,Hunan,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210024,Jiangsu,China;CMOC Group Limited,Luoyang 471500,Henan,China)

机构地区：[1]长沙有色冶金设计研究院有限公司,湖南长沙410011 [2]河海大学水利水电学院,江苏南京210024 [3]洛阳栾川钼业集团股份有限公司,河南洛阳471500

出　　处：《水力发电》2023年第4期42-46,90,共6页Water Power

基　　金：国家重点研发计划(2019YFC1510802);国家自然科学基金/雅砻江联合基金(U1765205);江苏高校优势学科建设工程资助项目(水利工程)(YS11001);广东省水利科技创新项目(2020-04)。

摘　　要：尾矿库的浸润线对坝体的稳定安全至关重要,淤堵作用会导致坝体排渗系统失效和介质渗透系数减小,坝体浸润线升高,增加边坡失稳的可能性。为此,以河南某复杂尾矿库工程为背景,研究发现其现状模型运行期实测浸润线明显高于数值模拟结果,在1317 m高程附近最大埋深差值达到10.43 m,应考虑存在淤堵现象。针对上述问题,对尾矿库二期设计高程排渗设施不同失效程度下渗流场的变化进行研究,分析了排渗席垫不同失效情况下尾矿库渗流场的变化。结果表明:排渗席垫渗透系数降为原来的0.7、0.5和0.3时,堆积坝临界浸润线埋深均满足安全要求。The infiltration line of tailing pond is critical to the stability and safety of dam.The siltation can lead to the failure of dam drainage system and the reduction of media permeability coefficient,which will increase the infiltration line of dam and the possibility of slope instability.Taking a complex tailing pond project in Henan Province as study background,it is found that the measured infiltration line during the operation period of its current model is significantly higher than the numerical simulation results,and the maximum burial depth difference reaches 10.43 m near the elevation 1317 m,so the existence of siltation phenomenon should be considered.In view of above problems,the change of seepage field under different failure degrees of drainage facilities at the second stage design elevation of the tailings pond is studied,and the change of seepage field of tailing pond under different failure conditions of drainage mat is analyzed.The results show that the critical infiltration line depth of heap dam meets the safety requirements when the infiltration coefficient of drainage mat is reduced to 0.7 times,0.5 times and 0.3 times of original infiltration coefficient.

关 键 词：尾矿库 排渗席垫 淤堵现象 失效程度 临界浸润线 渗流场 

分 类 号：TV641[水利工程—水利水电工程]