基于MODFLOW的某选矿厂对地下水环境的影响研究

Analysis on Impact of MODFLOW-based Mineral Processing Plant on Groundwater

以某选矿厂库区作为区域进行概化研究,对该区域边界条件、地下水流动特征以及含水层系统结构等进行概化,一是建立评价区的水文地质概念模型,二是应用MODFLOW建立地下水水流模型和溶质运移模型,模拟了相关特征污染物在浮选车间浮选槽发生泄漏事故工况下的运移情况。数值模拟预测地下水污染情况,氨氮、汞、砷对周边地下水环境造成了严重的污染,六价铬和氰化物影响较小,在预测10年内均未检出。选矿厂的非正常工况对该地区地下水水质构成潜在的影响。

This paper chooses a mineral proceeding plant in Gansu Province as study area. The paper established hydrogeological conceptual mode, then using MODFLOW establishes a groundwater flow model and a solute transport model, and simulates the migration pollutants of different kinds under different non-normal conditions. The numerical simulation predicts groundwater of the pollutants. The impacts on the water environment of ammonia, mercury and arsenic prove to be greater while those of hexavalent chromium and cyanide are smaller, and these two ions were not detected in the prediction 10 years. Abnormal conditions of the mineral processing plant will have potentially impacts on groundwater quality in the area.