Hydrochemical formation mechanism and transmissivity-impermeability analysis of karst groundwater on both sides of fault F104 in Gubei coal mine in Huainan

Authors

ZHENG Zhuyan, School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
XU Guangquan, School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, ChinaFollow
YANG Tingting, School of Earth and Environment,Anhui University of Science and Technology, Huainan 232001, China
YU Shitao, School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
ZHANG Haitao, School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China

Abstract

It is of great practical significance for the prevention and control of groudwater hazards in North China type coalfield to judge transmissivity-impermeability of faults by using karst hydrochemical characteristics of two fault walls. Taking karst groundwater of Taiyuan Formation on both sides of fault F₁₀₄ in Gubei coal mine as the research object, and based on the analysis of the hydrogeological conditions of two fault walls, main components sources and water-rock interaction differences were analyzed by using Piper trilinear diagram, ion combination ratio and principal component methods. Reverse hydrochemical simulation of karst groundwater was conducted by using PHREEQC software. Research results show that dissolution and precipitation of calcite and dolomite exist in the north and south areas; cation exchange and desulfurization in the south region are stronger than that in the north area; while oxidation of pyrite and dissolution of salt rock in the north area is more obvious than those in the south area; there are significant differences in the hydrochemical environment and water-rock interaction between the two areas. It is inferred that fault F₁₀₄ has a preferably water-resistance, and affects the oxidation-reduction environment and temperature differences of the two areas, which controlling the direction of groundwater runoff and the degree of water-rock interaction.

Keywords

transmissivity-impermeability of faults, karst groundwater, water-rock interaction, reverse simulation of hydrochemistry, Gubei coal mine, Huainan coalfield, North China type coalfield

DOI

10.3969/j.issn.10011986.2020.01.017

Recommended Citation

ZHENG Zhuyan, XU Guangquan, YANG Tingting, et al. (2020) "Hydrochemical formation mechanism and transmissivity-impermeability analysis of karst groundwater on both sides of fault F104 in Gubei coal mine in Huainan," Coal Geology & Exploration: Vol. 48: Iss. 1, Article 18.
DOI: 10.3969/j.issn.10011986.2020.01.017
Available at: https://cge.researchcommons.org/journal/vol48/iss1/18

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