采煤作用下岩溶水水化学时空演化特征及控制因素分析——以山东济南潘西煤矿为例  

Analysis of Spatiotemporal Evolution and Hydrochemical Characteristics and Control Factors of Karst Groundwater under Coal Mining:A Case of Panxi Coal Mine in Ji’nan City,Shandong Province

作　　者：段乃金 DUAN Naijin(Shandong Geological Prospecting Institute of China Chemical Geology and Mine Bureau,Ji’nan,Shandong 250013)

机构地区：[1]中化地质矿山总局山东地质勘查院,山东济南250013

出　　处：《中国煤炭地质》2024年第10期58-65,共8页Coal Geology of China

基　　金：中化地质矿山总局科技创新基金(ZH201911);潘西煤矿矿井水防治研究项目(D201935)。

摘　　要：为揭示采煤作用下岩溶水水化学的时空演化规律,以潘西煤矿岩溶水为研究对象,运用Piper三线图、相关性分析、离子比例关系及矿物饱和指数等方法分析了岩溶水水化学特征及演化规律,探讨了物质来源及煤矿开采对主要离子的影响。研究结果表明:岩溶水中优势阳离子为Ca^(2+),优势阴离子为HCO_(3)^(-);岩溶水中常规离子含量均有上升,SO_(4)^(2-)、Na^(+)及Cl^(-)含量上升幅度较大,伴随着煤矿的开采地下水化学类型由单一向复杂化发展;岩溶水化学组分主要来源于碳酸岩、硫酸盐及蒸发岩盐等溶解。采煤作用使岩溶水系统由还原环境转变为氧化环境,导致SO_(4)^(2-)、Na^(+)含量持续上升。To reveal the spatiotemporal evolution and hydrochemical law of karst groundwater under coal mining,the Panxi coal mine karst groundwater was taken as the research object.The hydrochemical characteristics and evolution law of karst groundwater were analyzed using methods such as Piper triangular diagrams,correlation analysis,ion proportion relationship,and mineral saturation index.The influence of material sources and coal mining on the main ions was discussed.The research results indicate that the dominant cation in karst water is Ca2+,and the dominant anion is HCO_(3)^(-).The conventional ion content in karst groundwater has increased,while the content of SO_(4)^(2-),Na^(+),and Cl^(-)has increased significantly,accompanied by the development of groundwater chemical types from single to complex during coal mining.The chemical components of karst groundwater mainly come from the dissolution of carbonate rocks,sulfates,and evaporated rock salts.The coal mining process transforms the karst groundwater system from a reducing environment to an oxidizing environment,leading to a continuous increase in SO_(4)^(2-)and Na^(+)content.

关 键 词：岩溶地下水 水化学演化特征 水岩作用 潘西煤矿 

分 类 号：P641.4[天文地球—地质矿产勘探]