【摘要】 近年来通过对大树硫铁矿矿井涌水的监测,发现其水量大、水质差,已造成周围水体的污染。为弄清矿井涌水来源,该文结合水文地质条件采用水化学分析方法与环境同位素分析方法,利用地下水氘过量参数与氚含量分布特征,识别矿井涌水的来源,解析矿井涌水的污染成因。结果表明:矿井涌水与部分受污染龙潭组、茅口组地下水具有相似特征,主要表现为低pH值、高SO₄^2-、高TDS和高硬度;通过氘过量参数与氚含量分布特征,识别出了矿井涌水的主要来源,采用同位素质量平衡方程对进行混合比例计算,确定了不同来源对矿井涌水的贡献量。该文采用水水化学与同位素方法识别矿井涌水来源,对大树硫铁矿地下水修复及类似矿区地下水修复具有重要参考意义。更多还原

【Abstract】 In recent years, monitoring of Dashu pyrite abandoned mine found large amount of water and poor water quality,causing serious water pollution around. In order to find out the source of mine drainage, hydrochemical analysis method and environmental isotope method are adopted in combination with hydrogeological conditions, and deuterium excess parameter and tritium content distribution characteristics of groundwater are used to identify the source of mine drainage water. The results show that the mine drainage has similar characteristics with the groundwater of the partially polluted Longtan Group and Maokou Group, mainly manifested as low p H value, high SO42-, high TDS and high hardness. The source of mine drainage water was identified by deuterium excess parameter and tritium content distribution, and the mixing ratio was determined by isotopic mass balance equation. In this paper, the method of water chemistry and isotope is used to identify the source of mine drainage water, which is of great reference significance for groundwater remediation of Dashu pyrite and similar mining areas.更多还原