Identification of the sources of old kiln water and the causes of water pollution in the historical manganese mine
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摘要:
历史遗留矿山的老窑水防治是矿山水环境治理中的难点。选取中国锰三角地区的典型锰矿区为研究对象,以查明老窑水的来源及水体污染成因。综合利用矿山水文地质调查、气象水文分析、水化学与同位素溯源等技术方法对老窑水来源和特征污染物进行了识别,并分析了矿区的水体污染成因模式。结果表明:研究区老窑水动态对降雨响应灵敏,老窑水主要来源于巷道和优势径流通道汇集的大气降水和含水层中的地下水;矿区矿井水、巷道水中的特征污染物为硫酸锰,矿山排水的特征污染物为硫酸钠,硫酸锰主要由硫铁矿氧化和菱锰矿溶解而形成;矿山固体废弃物淋滤入渗和老窑水的混合是区内地下水的主要污染方式,而地表水主要受矿山固体废弃物淋滤汇流、巷道口排水和矿山排水的污染。研究成果为矿山水环境治理提供了水量形成和水质演化的科学依据。
Abstract:The prevention and control of old kiln water in historical mines is a challenging problem in mine water management. In this paper, the typical manganese mining area in the manganese triangle area of China is selected as a case study.
Objective In order to identify the sources of old kiln water and the causes of water pollution,
Methods the technical approaches such as mine hydrogeological survey, hydrological analysis, hydrochemistry and isotope tracing are used to identify the source and characteristic pollution of old kiln water, and the causes of water pollution in the mining area is analyzed.
Results Results show that, the hydrological response of old kiln water in the study is sensitive to rainfall events. The old kiln water mainly comes from the rainfall collected by the roadway, dominant runoff channel and groundwater in the aquifer. The characteristic pollutants of mine water and roadway water are manganese and sulfate, and the characteristic pollutants of mine drainage are sodium and sulfate. Manganese and sulfate are mainly formed by the oxidation of pyrite and the dissolution of rhodochrosite. The leaching and infiltration of mine solid waste and the mixing of old kiln water are main causes of groundwater pollution, while the surface water is mainly affected by pollution of leaching and confluence from mine solid waste, roadway drainage and mine drainage.
Conclusion The research results of this paper provide a scientific basis for water quantity formation and water quality evolution for mine water environment management.
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Key words:
- manganese mine /
- old kiln water /
- source identification /
- pollution cause /
- water pollutioin
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