云南勐兴铅锌矿区地下水化学成分与影响因素研究

Study on Chemical Components and Influencing Factors of Groundwater in Mengxing Lead-zinc Mining Area in Yunnan Province

云南勐兴铅锌矿矿区位于怒江与勐兴坝子夹持的近南北向分水岭西侧的斜坡地带,受地层产状及构造制约,构成单斜自流斜地,为独立的水文地质单元。通过对矿区丰水期、枯水期地下水水样进行化学成分分析,探讨地下水成分变化与影响因素之间联系,结果显示:按丰水期和枯水期进行地下水主要物理化学指标统计分类,地表出露泉点水化学类型以HCO_3-Ca·Mg为主,次之为HCO_3-Ca型水;坑道中以HCO_3-Ca为主,次之HCO_3-Na·Ca·Mg、HCO_3·SO_4-Ca型水,影响地下水化学成分的主要因素为含水层岩性、取样时期、循环周期与径流路径差异和地下水的污染程度。在对该矿区矿产资源开发利用过程中要防止地下水污染,加强对环境的保护,使其理论与方法对同类矿山起到借鉴作用。

The Mengxian lead-zinc mine in Yunnan is located in the slope zone on the west side of the watershed near the north-south divide clamped by the Nu River and Mengxingba sub-submarine.Due to formation constraints and tectonics,it is an independent hydro-geological unit.Through the chemical composition analysis of the groundwater samples during the wet and dry periods of the mining area,the relationship between the changes of the groundwater components and the influencing factors is discussed.The results show that the main physical and chemical indicators of groundwater are classified according to the wet and dry periods,Hydrochemical types are mainly HCO3-Ca Mg,followed by HCO3-Ca type water;mainly HCO3-Ca in the tunnel,followed by HCO3-Na,Ca,HCO3-CaSO4-Ca type water,affecting groundwater The main chemical components of the aquifer lithology,sampling period,cycle and runoff path differences and groundwater pollution levels.During the development and utilization of the mineral resources in this mining area,it is necessary to prevent the pollution of groundwater and to strengthen the protection of the environment so that its theories and methods can serve as a reference for similar mines.