Mechanism of water rock interaction in coal measure sandstone aquifer disturbed by grouting engineering: A case study of Taoyuan Coal Mine

Authors

GUO Yan, National Engineering Research Center of Coal Mine Water Hazard Controlling, School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
GUI Herong, National Engineering Research Center of Coal Mine Water Hazard Controlling, School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, ChinaFollow
WEI Jiuchuan, College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
NI Jianming, Huaibei Mining Co. Ltd., Huaibei 235000, China
CHENG Rongfa, Huaibei Mining Co. Ltd., Huaibei 235000, China
PANG Yingchun, Huaibei Mining Co. Ltd., Huaibei 235000, China
ZHANG Zhi, Huaibei Mining Co. Ltd., Huaibei 235000, China
HONG Huang, Coalmine of Anhui Hengyuan Coal-Electricity Group Co. Ltd., Suzhou 234000, China
HU Mancong, Huaibei Mining Co. Ltd., Huaibei 235000, China
CUI Yali, Coalmine of Anhui Hengyuan Coal-Electricity Group Co. Ltd., Suzhou 234000, China
LIANG Zhan, Coalmine of Anhui Hengyuan Coal-Electricity Group Co. Ltd., Suzhou 234000, China
LI Jun, School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230000, China
CHEN Jiayu, School of Earth and Environment, Anhui University of Science and Technology, Huainan 232000, China
LI Chen, School of Earth and Environment, Anhui University of Science and Technology, Huainan 232000, China

Abstract

Coal measure sandstone fissure water is one of the important water filling sources in coal mine. This paper takes the Permian coal measures in Taoyuan Coal Mine of Huaibei Coalfield as the research object. Based on the analysis of the water chemical characteristics of coal measures since the grouting treatment of water disaster in the mine, the mechanism of hydrogeochemical action of groundwater and its controlling factors were expounded. The results show that during the grouting treatment project, the main cation in coal measures water was Na⁺, and the main anion was SO₄^2-; the relationship of cation mass concentration was Na⁺ > Ca²⁺ > Mg²⁺, and the correlation of anion mass concentration was SO₄^2- > HCO₃^- > Cl^-. Through the analysis of Durov hydrochemical diagram, the main hydrochemical types of coal measures during grouting treatment were Na-SO₄ and Na-HCO₃. There were oxidation of pyrite or dissolution of carbonate and sulfate in coal measures water, accompanied by a certain degree of cation alternate adsorption and desulfurization, especially during the implementation of grouting treatment project, the cation alternating adsorption was enhanced. Large scale water inrush, water prevention and control engineering by grouting, geological structure background and mining activities all affected the water-rock interaction of coal measures water in varying degrees, and the influence degree increased with the increase of grouting treatment scope.

Keywords

coal measure water, hydrochemical type, hydrochemical evolution, water rock interaction and controlling factors, Taoyuan Coal Mine in Huaibei

DOI

10.3969/j.issn.1001-1986.2021.01.025

Recommended Citation

GUO Yan, GUI Herong, WEI Jiuchuan, et al. (2021) "Mechanism of water rock interaction in coal measure sandstone aquifer disturbed by grouting engineering: A case study of Taoyuan Coal Mine," Coal Geology & Exploration: Vol. 49: Iss. 1, Article 26.
DOI: 10.3969/j.issn.1001-1986.2021.01.025
Available at: https://cge.researchcommons.org/journal/vol49/iss1/26

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