Analysis and Study on Hydrochemical Characteristics of Groundwater in Dahaze Mine Field in Yuheng Mining Area

The coal seam in the Yuheng mining area is deeply buried, and there are many underground aquifers. The coal seam mining is mainly threatened by roof water. In order to quickly identify the mine water filling source and provide the basis for the rational formulation of coal mine water control measures, taking Dahaize minefield as an example, through the analysis and study of the hydrochemical characteristics of the main aquifers in the field, it can be seen that with the increase of the depth of the aquifer, the hydrochemical type, the content of cations and anions, and the mineralization degree are very different from those of the Luohe formation aquifer. It is mainly reflected that with the increase of aquifer depth, the contents of anionic SO42− and cationic Na+ in groundwater increase significantly, and the salinity also increases. Compared with the hydrochemical characteristics of the aquifer in Luohe formation, it shows that the groundwater recharge and runoff conditions of Anding formation and Zhiluo formation are worse, the water yield is weaker, the mineral dissolution is enhanced, the salinity in groundwater is increased, and the water quality is worse.