Hydrogeochemical Characteristics and Formation Mechanisms of the Geothermal Water in the Qingdong Coal Mine, Northern Anhui Province, China

Xu, Jiying; Gui, Herong; Chen, Jiayu; Li, Chen; Li, Ye; Zhao, Chenbo; Guo, Yan

doi:10.1007/s10230-022-00895-2

Cited by 6 publications

(5 citation statements)

References 41 publications

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“…Na + , K + , Ca 2+ , Mg 2+ , SO 4 2− , Cl − , HCO 3 − , and other conventional components account for more than 90% of inorganic content in groundwater, so the conventional components determine the hydrochemical type of groundwater [ 9 ]. Due to the content of K + in groundwater in the coal mining area is far lower than that of Na + , and the nature of K + is similar to that of Na + , thus K + can be unconditionally incorporated into Na + in hydrochemical statistical analysis [ 26 ]. According to the production situation of Hengyuan Coal Mine, the sampling time is divided into three stages.…”

Section: Resultsmentioning

confidence: 99%

“…The relationship between Cl − /Ca 2+ and Cl − can reveal the hydrodynamic conditions of groundwater ( Figure 13 ) [ 52 ]. If Cl − /Ca 2+ is inversely proportional to Cl − , it indicates that groundwater has good hydrodynamic conditions [ 26 ]. The weak interaction between groundwater and surrounding rock reduces the risk of over dissolution.…”

Section: Resultsmentioning

confidence: 99%

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Study on the Influence of Mining Activities on the Quality of Deep Karst Groundwater Based on Multivariate Statistical Analysis and Hydrochemical Analysis

Gui²,

Guo

et al. 2022

IJERPH

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Long-term mining activities have changed the hydrogeochemical evolution process of groundwater and threatened the safe use of groundwater. By using the methods of hydrochemistry and multivariate statistical analysis, this study determined the hydrogeochemical evolution mechanism affecting the quality of karst groundwater by analyzing the conventional hydrochemistry data of the karst groundwater of the Carboniferous Taiyuan Formation in Hengyuan Coal Mine in the recent 12 years. The results show that, under the disturbance of mining, the quality of karst groundwater in Taiyuan Formation is poor, mainly because the contents of Na++K+ and SO42− are too high to allow usage as drinking water. The reason for the high content of SO42− in karst groundwater lies in the dissolution of gypsum and the oxidation of pyrite, and the high content of Na++K+ lies in the cation exchange. Influenced by the stratum grouting, the circulation of karst groundwater is improved, the cation exchange is weakened, and the desulfurization is enhanced. In the future, it is predicted that the hydrochemical type of karst groundwater in Taiyuan Formation in the study area will evolve from SO4-Ca·Mg type to HCO3-Ca Mg type.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Study on the Influence of Mining Activities on the Quality of Deep Karst Groundwater Based on Multivariate Statistical Analysis and Hydrochemical Analysis

Gui²,

Guo

et al. 2022

IJERPH

Self Cite

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“…The difference of chemical composition of groundwater is affected by many factors, such as dissolution and precipitation of halite, carbonate minerals, sulfate minerals, weathering of silicate minerals and ion exchange, of which the strength of lixiviation depends on the solubility of rock, the development of pores, the solubility of water, and the alternating strength of water [45]. The ion ratio relationship can be used to reveal the source of chemical components in groundwater and the possible hydrogeochemical effects.…”

Section: Dissolutionmentioning

confidence: 99%

Hydrochemical Characteristics and Reverse Hydrogeochemical Modeling of Taiyuan Formation Limestone Groundwater of Sunan Mining Area in Huaibei Coalfield

Gong,

Peng,

et al. 2024

Pol. J. Environ. Stud.

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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 SO 4 .Cl-Ca.Mg and HCO 3 .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 CO 2 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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“…The water level rises at the fracture zone intersection and is stored in the lower and middle Cambrian thermal reservoirs, continuing to receive heat from deeper heat sources. In the Qingdong coal mine in China, Xu et al [9] gathered 13 samples of geothermal water (>34 • C) and 11 samples of ordinary groundwater (>0 • C). The findings reveal that atmospheric precipitation and water-rock interaction are the region's primary sources of geothermal water.…”

Section: Introductionmentioning

confidence: 99%

Dimensionless Analysis of the Spatial–Temporal Coupling Characteristics of the Surrounding Rock Temperature Field in High Geothermal Roadway Realized by Gauss–Newton Iteration Method

Zhou,

Zhang,

Shi

et al. 2024

Applied Sciences

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Understanding the time–space coupling characteristics of the surrounding rock temperature field in high geothermal roadways is essential for controlling heat damage in mines. However, current research primarily focuses on individually analyzing the temperature changes in the surrounding rock of roadways, either over time or space. Therefore, the Gauss–Newton iteration method is employed to model the coupling relationship between temperature, time, and space. The results demonstrate that the dual coupling function describing the temperature field of the surrounding rock in both time and space provides a more comprehensive characterization of the temperature variations. Over time, as ventilation duration increases, the fitting degree of the characteristic curve steadily rises, and the characteristic curve descends overall. In the spatial dimension, the fitting degree of the characteristic curve gradually decreases with the rise of the dimensionless radius, and the characteristic curve ascends overall. Additionally, as thermal conductivity increases, the fitting degree of the characteristic curve steadily rises.

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Hydrogeochemical Characteristics and Formation Mechanisms of the Geothermal Water in the Qingdong Coal Mine, Northern Anhui Province, China

Cited by 6 publications

References 41 publications

Study on the Influence of Mining Activities on the Quality of Deep Karst Groundwater Based on Multivariate Statistical Analysis and Hydrochemical Analysis

Study on the Influence of Mining Activities on the Quality of Deep Karst Groundwater Based on Multivariate Statistical Analysis and Hydrochemical Analysis

Hydrochemical Characteristics and Reverse Hydrogeochemical Modeling of Taiyuan Formation Limestone Groundwater of Sunan Mining Area in Huaibei Coalfield

Dimensionless Analysis of the Spatial–Temporal Coupling Characteristics of the Surrounding Rock Temperature Field in High Geothermal Roadway Realized by Gauss–Newton Iteration Method

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