东川因民矿区地下水-选厂水水化学特征及资源化影响因素

Hydrochemical Characteristics of Groundwater and Concentrating Mill Water and Factors Affecting Transformation to Water Resources in the Yinmin Mining Area,Dongchuan,Yunnan Province

矿区水质分析结果表明,地下水属弱碱性淡水软水-微硬水。泉水水化学类型为HCO3-Ca·Mg。坑道水水化学类型为HCO3-Mg·Ca、HCO3·SO4-Mg·Ca、SO4·HCO3-Mg·Ca和SO4-Mg·Ca。地下水水化学成分的变化与(SO42-)浓度相关。泉水与坑道水具有一定的水力联系。选厂排放水中Pb、As含量高于坑道水。坑道水、选厂排放水具有弱侵蚀性。采矿活动和选矿过程对地下水-选厂水水质有较大影响,地下水水化学演变受控于矿业活动和矿区地球化学背景。

Based on the quality analysis of groundwater and concentrating mill water from the Yinmin mining area, Dongchuan, Yunnan Province, it is concluded that groundwater belongs to alkalescent water, fresh water, soft water to hard water. Spring water is of the HCO3-Ca·Mg type, but mining tunnel water is of the HCO3-Ca·Mg, HCO3·SO4-Mg·Ca, SO4·HCO3-Ca·Mg and SO4-Mg·Ca types. Changes in chemical composition of groundwater are related to c(SO2-4). The contents of Pb and As in discharge water from the concentrating mill are more than those in pits water. Spring water has hydraulic connections with pits water. Pits water and discharge water from the concentrating mill are low corrosive water. The quality of groundwater and concentrating mill water is affected seriously by mining activities. Hydrochemical evolution of groundwater is controlled by mining activities and the geochemical background of the mining area.