WANG Zitao, LIU Qimeng, LIU Yu. Spatial distribution and formation of groundwater hydrochemistry in Huainan coalfield[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(5): 40-47. DOI: 10.3969/j.issn.1001-1986.2019.05.006
Citation: WANG Zitao, LIU Qimeng, LIU Yu. Spatial distribution and formation of groundwater hydrochemistry in Huainan coalfield[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(5): 40-47. DOI: 10.3969/j.issn.1001-1986.2019.05.006

Spatial distribution and formation of groundwater hydrochemistry in Huainan coalfield

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National Key R&D Program of China(2017YFC0804101)

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  • Received Date: March 29, 2019
  • Published Date: October 24, 2019
  • In order to study the spatial distribution of groundwater in Huainan coalfield and the intensity of various hydrochemical actions, the coalfied is divided into the northern district with thicker loose beds and the southern district with thinner loose beds. Hydrochemical test data of main water-inrushing aquifers in 16 mines in these two areas were collected and statistically analyzed, ion combination method and Gibbs diagram were used to study the groundwater hydrochemical characteristics of each aquifer in north and south areas. The results indicate that TDS of aquifer is positively correlated with the burial thickness of unconsolidated formation. With the increase of the thickness of unconsolidated formation, the formation of hydrochemical components such as desulfurization, concentrated crystallization and cation alternating adsorption is enhanced, which makes SO42- consume continuously to form HCO3-, resulting in the precipitation of HCO3- bound Ca2+, Mg2+, and finally the formation of highly mineralized groundwater dominated by Cl-Na.
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