青东煤矿太原组灰岩水水文地球化学特征

Hydrogeochemical Characteristics of Limestone Water in Taiyuan Formation of Qingdong Coal Mine

摘要: 为了深入了解掌握淮北青东煤矿太原组灰岩水的水化学组成及其控制因素，本文收集了青东煤矿太原组灰岩水20个水样数据，采用统计分析，Piper三线图，Gibbs图，离子分析法，综合分析了研究区域的水化学特征及其水岩作用。结果表明，太原组水样水体中阳离子主要为钠离子和钙离子，阴离子主要为硫酸根离子和氯离子，水体为弱碱性淡咸水。Piper三线图表明，水化学类型主要为Ca·Na + K-SO₄·Cl型。离子分析法和Gibbs图表明研究地区离子来源与岩盐溶解、硫酸盐岩溶解、碳酸盐岩溶解、硅酸盐岩风化等作用有关，蒸发浓缩作用对研究地区影响最为显著。研究结果对矿井合理开采等工作提供指导。

Abstract: In order to deeply understand and master the hydrochemical composition and its controlling factors of the limestone water in the Taiyuan Formation of Qingdong Coal Mine in Huaibei, this paper collected data from 20 water samples of the limestone water in the Taiyuan Formation of Qingdong Coal Mine. Through statistical analysis, Piper trilinear diagrams, Gibbs diagrams, and ion analysis methods, the hydrochemical characteristics and water-rock interactions in the study area were comprehensively analyzed. The results show that the main cations in the water samples of the Taiyuan Formation are sodium ions and calcium ions, and the main anions are sulfate ions and chloride ions. The water body is weakly alkaline brackish water. The Piper trilinear diagram indicates that the hydrochemical type is mainly Ca·Na + K-SO₄·Cl type. The ion analysis method and Gibbs diagram show that the ion sources in the study area are related to processes, such as rock salt dissolution, sulfate rock dissolution, carbonate rock dissolution, and silicate rock weathering. The evaporation and concentration effect has the most significant impact on the study area. The research results provide guidance for the rational mining of the mine and other work.