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Understanding of mineral change mechanisms in coal mine groundwater reservoir and their influences on effluent water quality:a experimental study

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International Journal of Coal Science & Technology 2021年第1期8卷 154-167页

作者： Kai Zhang Huifang Li Jiaming Han Binbin Jiang Ju Gao School of Chemical and Environmental Engineering China University of Mining and TechnologyBeijingBeijing100083China State Key Laboratory of Water Resource Protection and Utilization in Coal Mining Beijing102211China

This paper presents results of an experimental study to characterize the law of mineral change of fallen rock in coal mine groundwater reservoir ant its influence on water *** minerals of the underground reservoir of Daliuta Coal Mine is taken as the research *** experiments were designed and conducted to simulate water–rock action in the *** mineral composition was analyzed by X-ray diffractometer(XRD),the surface morphology of the mineral was analyzed by scanning electron microscope(SEM),and the specific surface area,total pore volume and average pore diameter of the mineral were measured by fast specific surface/pore analyzer(BET).The experimental results show that the sandstone and mudstone in the groundwater reservoir of Daliuta Coal Mine account for 70%and 30%,*** pore diameter is 15.62–17.55 nm,and pore volume is 0.035 cc/*** pore structure is a key factor in the occurrence of water–rock *** to the water–rock simulation experiment,the quartz content before the water–rock action is about 34.28%,the albite is about 21.84%,the feldspar is about 17.48%,and the kaolinite is about 8.00%.After the water–rock action,they are 36.14%,17.78%,11.62%,and 16.75%,*** content of albite and orthoclase is reduced while the content of kaolinite is increased,that is,the Na+content becomes higher,and the Ca2+and Mg2+contents become *** research builds a good theoretical foundation for revealing the role of water and rock in underground coal reservoirs.

关键词： Coal mine underground reservoir fallen rock Water-rock interaction rock composition

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