阜东矿区水文地球化学特征及其形成作用

Hydro-geochemical Characteristics and Formation Analysis in Fudong Mine

以淮南煤田阜东矿区充水含水层为研究对象,采用统计分析、离子组合比分析及主成分分析法等对"底含、二叠、太灰、奥灰"等4个含水层共75个水样的水化学数据进行分析,结果表明:该矿区充水含水层阳离子以Na^+为主,阴离子以Cl^-为主,太灰中HCO_3^-含量较高,奥灰中SO_4^(2-)含量较高,水质类型以Cl-Na型、HCO_3-Na型、Cl·HCO_3-Na型为主;含水层中主要发生盐岩溶解与离子交换作用,其交换强度为二叠系砂岩含水层大于太灰与奥灰含水层,而"底含"最弱。

Taken water-bearing aquifers as the research object in Fudong mine in Huainan coalfield,by some methods such as statistical analysis, ion combination ratio analysis and principal component analysis, hydrogeochemical compositions of 75 samples from four aquifers involved in "Cenozoic bottom,Permian sand, Taiyuan formation limestone, Ordovician carbonate ", are analyzed, and the results show that the cation is dominated by Na+, and the anion is dominated by Cl-;the highest content of HCO3-is in Taiyuan aquifer;SO42-in Ordovician carbonate;and the hydrogeochemical types can be classified into Cl-Na、HCO3-Na、Cl·HCO3-Na. The action of dissolution and ion exchange mainly occurs in aquifers, which intensity is that the Permian′ s is greater than that of the Taiyuan and Ordovician carbonate aquifer, and the Cenozoic bottom is the weakest.