Abstract
Within the Pingdingshan coalfield, the spatial distribution characteristics of key groundwater chemical components were studied in four aquifers that influence coal-mining operations. Thirty-six water samples were collected from the four aquifers, which were divided into smaller units. Discriminant models of mine-water inrush sources were developed for the three divisions I, III, and IIII, and engineering verification was conducted. The results showed that the main indices influencing groundwater chemical characteristics were Na++K+, Ca2+, Mg2+, Cl−, SO4 2−, and HCO3− in the Pingdingshan coalfield with regional variations according to faults and synclines. The Guodishan fault was the primary groundwater chemical division structure, which divides the Pingdingshan coalfield into two primary groundwater chemically characteristic units, divisions I and II. The Likou syncline was the secondary groundwater chemically characteristic structure, which divides division II into two secondary groundwater chemically characteristic units: divisions III and IIII. Discriminant models of water inrush sources in divisions I, III, and IIII (12 discriminant functions) were developed, and engineering verification showed that discrimination accuracy for 16 groundwater samples in four aquifers of three divisions was 93.75 %.
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This work was financially supported by the National Natural Science of Foundation of China (Grant 41272250) and Technological Innovation Team of Colleges and Universities in Henan Province of China (Grant 15IRTSTHN027).
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Wang, X., Ji, H., Wang, Q. et al. Divisions based on groundwater chemical characteristics and discrimination of water inrush sources in the Pingdingshan coalfield. Environ Earth Sci 75, 872 (2016). https://doi.org/10.1007/s12665-016-5616-3
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DOI: https://doi.org/10.1007/s12665-016-5616-3