摘要
为考虑降雨-蒸发与地下水耦合作用对尾矿坝重金属迁移的影响,以本钢集团歪头山铁矿尾矿库作为工程背景,应用Geostudio软件,选择SEEP/W、VADOSE/W和CTRAN/W模块,模拟降雨和蒸发作用下的尾矿库地下水的渗流特性及重金属污染物的迁移规律。结果表明,降雨-蒸发作用对尾矿库表层土壤的孔隙水压力有影响,深层土壤基本无影响;考虑降雨-蒸发作用在一定程度上增加了重金属污染物在1825d内的迁移距离和平均迁移速度;重金属污染物Cu2+的浓度随时间推移而升高,考虑降雨-蒸发作用对于重金属污染物浓度起扰动作用;预测重金属污染物粒子在尾矿库土壤中历经7a迁移出露到坡面。研究结果为相似工程案例提供重要参考,为尾矿库环境地质评价和污染预测防治提供有力的科学依据。
In order to consider the influence of rainfall-evaporation and groundwater coupling action on heavy metal migration in tailings dam,under the engineering background of Waitou shan Iron ore tailings reservoirs of Ben Gang Group,SEEP/W,VADOSE/W and CTRAN/W modules in Geostudio were used to simulate the seepage characteristics and heavy metal pollutant migration rule in the inland water of the tailings reservoirs.The results show that the rainfall-evaporation has an effect on the pore water pressure of the topsoil of the tailings pond,but the deep soil is almost not affected.Considering rainfall-evaporation,the migration distance and average migration velocity of heavy metal pollutants within 1825dwere increased to a certain extent.The concentration of heavy metal pollutant Cu2+increases with the passage of time,considering that rain-evaporation has a disturbing effect on the concentration of heavy metal pollutant.It is predicted that heavy metal pollutant particles migrate to slope surface after 7 years in tailings reservoirs soil.The research results provide important reference for similar engineering cases,it provides powerful scientific basis for environmental geological evaluation and pollution prediction and prevention.
作者
陈红丹
郝喆
滕达
王晓明
CHEN Hongdan;HAO Zhe;TENG Da;WANG Xiaoming(College of Environment Sciences,Liaoning University,Shenyang 110036,China;Nonferrous Geological Exploration and Research Institute,Shenyang 110013,China)
出处
《有色金属工程》
CAS
北大核心
2021年第4期133-142,共10页
Nonferrous Metals Engineering
基金
辽宁省自然科学基金项目(20180550192)
辽宁省科技计划项目(2019JH8/10300107)
辽宁省百千万人才资助项目(辽百千万立项[2015]33号)
辽宁科技计划项目(2020JH2/10300100)。
关键词
尾矿库
污染物迁移
降雨
蒸发
数值模拟
Geostudio
tailings reservoir
migration of pollutants
rainfall
evaporate
numerical simulation
Geostudio
