煤层深埋矿区地下水化学组分含量随含水层埋深变化特征与指示意义——以榆横矿区大海则井田为例  

Variation Characteristics and Indicative Significance of Groundwater Chemical Composition Content with Aquifer Depth in Coal Seam Deep Buried Mining Area:Taking Dahaize Mine Field in Yuheng Mining Area as an Example

作　　者：吴涛 Wu Tao(Hydrogeology Engineering Geological Environment Geology Prospecting Institute,CNACG)

机构地区：[1]中国煤炭地质总局水文地质工程地质环境地质勘查院,河北邯郸056004

出　　处：《勘察科学技术》2022年第4期33-38,共6页Site Investigation Science and Technology

摘　　要：榆横矿区煤层埋藏深,含水层数量多,煤层开采主要受顶板水的威胁。根据不同含水层的地下水的水化学资料,可以进一步分析各含水层水文地质特征及成因机理,为合理制定煤矿防治水措施提供依据。该文以大海则井田为例,运用地下水的Piper三线图、Gibbs图、主要离子浓度关系图等方法,对井田内主要含水层水化学特征、水化学组分成因等分析研究。结果显示,大海则井田内地下水化学组分的成因和演化主要受蒸发浓缩作用和岩石风化作用的影响。地下水化学组分以方解石、盐岩和石膏的溶解为主要来源。随含水层埋深的增加,水化学类型、阴阳离子含量及溶解性总固体等与浅部含水层有很大的差别。主要反映在随含水层埋深增加,地下水中阴离子SO及其阳离子Na~+的含量明显增高,溶解性总固体含量也随之增高。The coal seam in Yuheng Mining Area are deeply buried and there are many aquifers. The coal seam mining is mainly threatened by roof water. According to the hydrochemical data of groundwater of different aquifers, the hydrogeological characteristics and genetic mechanism of each aquifer can be further analyze, so as to provide a basis for reasonably formulating water control measures in coal mine. Taking the Dahazi Mine Field as an example, this paper analyzes and studies the hydrochemical characteristics and hydrochemical components of the main aquifers in the mine field by using Piper three line diagram, Gibbs diagram, main ion concentration relationship diagram and other methods of groundwater. The results show that the genesis and evolution of groundwater chemical components in the Dahazi Mine field are mainly affected by evaporation and concentration and rock weathering. The dissolution of calcite, salt rock and gypsum is the main source of groundwater chemical components. With the increase of the buried depth of the aquifer, the hydrochemical type, the content of anions and anions and the total dissolved solids are very different from those of the shallow aquifer. It is mainly reflected in that with the increase of aquifer depth, the content of anionic SOand its cationic Nain groundwater increases significantly, and the content of total dissowed solids also increases.

关 键 词：地下水化学特征 成因分析 Piper图 Gibbs图 

分 类 号：P641.3[天文地球—地质矿产勘探]