Hydrochemical Characteristics and Reverse Hydrogeochemical Modeling of Taiyuan Formation Limestone Groundwater of Sunan Mining Area in Huaibei Coalfield
Wei Gong 1,2
Jie Ma 1,2
Hao Yu 3,2
Pan Xu 1,2
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School of Resources and Civil Engineering, Suzhou University, Anhui Province, Suzhou, 234000, China
National Engineering Research Center of Coal Mine Water Hazard Controlling, Anhui Province, Suzhou, 234000, China
School of Environment and Surveying Engineering, Suzhou University, Anhui Province, Suzhou, 234000, China
Submission date: 2023-07-22
Final revision date: 2023-11-09
Acceptance date: 2023-12-07
Online publication date: 2024-04-24
Publication date: 2024-05-23
Corresponding author
Zhichun Li   

School of Environment and Surveying Engineering, Suzhou University, China
Pol. J. Environ. Stud. 2024;33(4):4117-4123
Taiyuan Formation limestone groundwater is the main aquifer threatening the safety of exploration under deep mining in the Huaibei coalfield. Therefore, acknowledging the hydrochemical characteristics and constructing reverse hydrogeochemical modeling are crucial for predicting and preventing mine water hazards. In this study, the mathematical statistical analysis, Piper threeline diagram, Gibbs diagram, ion proportional relationship, Chlorine-Alkali index, and the reverse hydrogeochemical modeling were employed for determining the hydrochemical characteristics and the formation mechanism. The results revealed that the hydrochemical types of groundwater samples were SO4.Cl-Ca.Mg and HCO3.Cl-Na, respectively. The water-rock interactions were primarily influenced by the leaching and the cation exchange, with these processes being more intense in the eastern region. Through reverse hydrogeochemical modeling, the water-rock interactions in the process of groundwater runoff were quantitatively verified, viz. the calcite and the dolomite were saturated and precipitating, while the gypsum and the halite were unsaturated and still dissolving. Furthermore, the simulations of mass transfer in groundwater runoff indicated that the dissolution and the leaching of gypsum, dolomite and halite, positive ion exchange, the precipitation of calcite, and the dissolution of CO2 gas predominantly occurred along four simulated flow paths. These results offered a scientific foundation for the prevention and controlling of mine water hazards in deep mining contexts.
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