Volume 15 Issue 4
Dec.  2022
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Xiang Zhao, Wei-hua Peng, Kai Chen, Xin-yi Qiu, Lin-hua Sun. 2022: Potential hydraulic connectivity of coal mine aquifers based on statistical analysis of hydrogeochemistry. Water Science and Engineering, 15(4): 285-293. doi: 10.1016/j.wse.2022.08.004
Citation: Xiang Zhao, Wei-hua Peng, Kai Chen, Xin-yi Qiu, Lin-hua Sun. 2022: Potential hydraulic connectivity of coal mine aquifers based on statistical analysis of hydrogeochemistry. Water Science and Engineering, 15(4): 285-293. doi: 10.1016/j.wse.2022.08.004

Potential hydraulic connectivity of coal mine aquifers based on statistical analysis of hydrogeochemistry

doi: 10.1016/j.wse.2022.08.004
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This work was supported by the Natural Science Research Project of Universities in Anhui Province (Grants No. KJ2020ZD64 and KJ2020A0740), the Anhui Provincial Natural Science Foundation (Grant No. 2008085MD122), the Zhejiang Provincial Natural Science Foundation (Grant No. LQ20D010009), the Key Program for Outstanding Young Talents in Higher Education Institutions of Anhui Province (Grant No. gxyqZD2021134), the Research Development Foundation of Suzhou University (Grant No. 2021fzjj28), and the Doctoral Scientific Reuter Foundation of Suzhou University (Grant No. 2019jb15).

  • Received Date: 2021-12-21
  • Accepted Date: 2022-08-27
  • Rev Recd Date: 2022-07-06
  • Available Online: 2022-11-04
  • Mining activities interfere with the natural groundwater chemical environment, which may lead to hydrogeochemical changes of aquifers and mine water inrush disasters. This study analyzed the hydrochemical compositions of 80 water samples in three aquifers and developed a water source identification model to explore the control factors and potential hydraulic connection of groundwater chemistry in a coal mine. The results showed that the hydrochemical types of the three aquifers were different. The main hydrochemical compositions of the loose-layer, coalbearing, and limestone aquifers were HCO3·Cl-Na, SO4·HCO3-Na, and SO4-Na·Ca, respectively. The correlation, Unmix, and factor analyses showed that the hydrochemical composition of groundwater was controlled by the dissolution of soluble minerals (such as calcite, dolomite, gypsum, and halite) and the weathering of silicate minerals. The factor score plot combined with Q-mode cluster analysis demonstrated no remarkable hydraulic connection among the three aquifers in the study area. The water source identification model effectively identified the source of inrush water. Moreover, the mixing ratio model rationally quantified the contributions of the three aquifers to inrush water.

     

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