Groundwater Geochemical Variation and Controls in Coal Seams and Overlying Strata in the Shennan Mining Area, Shaanxi, China

Guo, Chen; Gao, Junzhe; Wang, Shengquan; Zhang, Chi; Li, Xiaolong; Gou, Jiang; Lu, Lingling

doi:10.1007/s10230-022-00867-6

Cited by 5 publications

(1 citation statement)

References 42 publications

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“…Sulfate reduction is one of the common characteristics of water-rock interaction in coal mine groundwater [ 53 ]. The deep coal measures stratum is in an anoxic environment, and the marine clay rock on the roof of the coal seam is rich in Na + .…”

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

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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%

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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Method for determining the feasibility of coalbed methane coproduction based on trace elements in produced water ——A case study of the Hancheng Block, southeastern Ordos Basin, China

Guo,

Yang,

Wang

et al. 2023

Geoenergy Science and Engineering

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Hydrogeochemical evolution and processes based on multivariable statistical and inverse simulation modeling: A coal mine in the Northern Coalfield, China

Zhu,

Li,

Zhao

et al. 2024

Water Supply

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Considering groundwater from the aquifers overlying the bedrock is an important water source for drinking purposes. As such, the investigation of its property is essential. Based on the spatial structure of aquifers in the study area, the aquifers in the Cenozoic strata are divided into three groups. The multivariate statistical approaches are employed to identify the hydrogeochemical processes and hydro-chemical types, and hydrogeochemical inverse modeling is applied to further validate and elucidate the hydrogeochemical process and water–rock interaction. The results are as follows: (1) The hydro-chemical type of the upper aquifer is dominated by the K + Na-HCO3 type, while others have similar water quality types, which are dominated by the K + Na-Cl type and the K + Na-SO4 type. (2) The saturation index of anhydrite, gypsum, halite, and CO2(g) is below zero in three aquifers, indicating that they are unsaturated. While aragonite, calcite, and dolomite in the middle aquifer remain in the unsaturated–saturated state. (3) The cation exchange process accelerating the reduction of Ca2+ concentration and the increase of SO42− concentration occurs in three aquifers, and the dissolution of calcite and dolomite minerals occurs in most cases. This study supports the fundamental evidence for the hydrogeochemical processes and water resource utilization and has a certain practical significance.

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Groundwater Geochemical Variation and Controls in Coal Seams and Overlying Strata in the Shennan Mining Area, Shaanxi, China

Cited by 5 publications

References 42 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

Method for determining the feasibility of coalbed methane coproduction based on trace elements in produced water ——A case study of the Hancheng Block, southeastern Ordos Basin, China

Hydrogeochemical evolution and processes based on multivariable statistical and inverse simulation modeling: A coal mine in the Northern Coalfield, China

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