矿区砂岩含水层水岩作用及水化学特征研究——以青东煤矿为例  

Study on Water-Rock Interaction and Hydrochemical Features of Sandstone Aquifer in Mining Area—Taking Qingdong Coal Mine as an Example

作　　者：沈孝珂 马杰 王新军 孟志明[2] 王新建[3] 王亮[3] 代涛[3] 

机构地区：[1]宿州学院资源与土木工程学院,安徽 宿州 [2]淮北矿业股份有限公司通防地测部,安徽 淮北 [3]安徽省煤田地质局水文勘探队,安徽 宿州

出　　处：《地理科学研究》2024年第2期304-311,共8页Geographical Science Research

摘　　要：本文以青东煤矿砂岩含水层23组样品为研究对象,运用Piper三线图、离子浓度直方图、主成分分析、相关性分析等方法,对该含水层的水化学特征、水岩相互作用以及离子来源等水文地球化学特征进行研究。结果表明:常规离子含量排序为: > Na K > > Cl− > Ca2 > > Mg2 ,阴阳离子的优势离子分别是和Na K;主成分表明主成分1中Ca2 和Cl−均有较强的正相关,Cl−含量与岩盐矿物溶解有关,Ca2 的含量较高说明阳离子交替吸附作用较为明显,主成分2中Ca2 、Mg2 荷载值较高,其次为,说明其水化学作用主要为硫酸盐岩矿物溶解,主成分3中K Na 、有强正相关,与Cl−有中相关,代表了硫酸岩矿物、岩盐等矿物的溶解;相关性分析表明,砂岩含水层中对pH起主要影响作用,K Na 和、Ca2 和Mg2 之间的正相关性较强,主要源于硅酸盐矿物的风化和硫酸盐岩矿物的溶解,K Na 和Cl−呈中等正相关,说明这些元素可能来自于岩盐。In this study, 23 sets of samples of sandstone aquifer in Qingdong Coal Mine were taken as the research object, and the hydro geochemical features such as hydrochemical features, water-rock interaction and ion source were studied by using Piper three-line diagram, ion content histogram, principal component analysis and correlation analysis. The results showed that the orders of ion contents were > Na K > > Cl− > Ca2 > > Mg2 , respectively, the dominant ions of anions and cations were and Na K . The principal component indicated that Ca2 and Cl− had a strong positive correlation in principal component 1, and the content of Cl− was related to the dissolution of rock salt minerals. The high content of Ca2 suggested that the cation exchange was more obvious. The load values of Ca2 and Mg2 in principal component 2 were higher, was lower than them, this indicated that the hydrochemistry action was mainly the dissolution of sulfate rock minerals. K Na and in principal component 3 had a strong positive correlation and were moderately correlated with Cl−, it represented that the dissolution of sulfate rock minerals, rock salts and other minerals. The correlation analysis implied that played a major role in the pH of sandstone aquifer. There was a strong positive correlation between K Na and , also between Ca2 and Mg2 , which were mainly due to the weathering of silicate minerals and the dissolution of sulfate rock minerals. K Na and Cl− showed a moderate positive correlation, indicating that these elements may come from the rock salt.

关 键 词：砂岩含水层 水化学分析 主成分分析 相关性分析 

分 类 号：P61[天文地球—矿床学]