巨厚古近系含水层下工作面导水裂隙带高度探查

doi:10.19286/j.cnki.cci.2023.04.017

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Abstract In order to determine the mining upper limit of the working face under the thick Paleogene aquifer, predict the water inflow and formulate the water prevention and control scheme, it is necessary to carry out field measurement on water conduction fracture zone of the working face. Taking the No.HI0503 face of Hongsi Mine as the research object, the development height of water conduction fracture zone was preliminarily determined by empirical formula, and then the parameters of underground exploration borehole were designed. The water pressure test was carried out with 0.5 MPa, 1.0 MPa and 1.5 MPa water pressure respectively. At the same time, the fracture development degree in the overlying rock of the working face was observed by drilling peeping. Finally, the results of field measurement were verified by numerical simulation. The results showed that the height of water conduction fracture zone in No.HI0503 face was 65.6-67.4 m by water pressure test. The height of water conduction fracture zone was determined to be 66.5-68.1 m by drilling peeping method. The height of water conduction fracture zone was 65.29 m by numerical simulation. The height of water conduction fracture zone in No.HI0503 face was determined to be 65.29-68.1 m by three methods, which was 59.79 m higher than the calculated value of empirical formula. The average distance between the No.5-2 coal seam and the thick Paleogene aquifer was 95 m, and the water conduction fracture zone after mining of the working face would not affect the Paleogene aquifer.Through field verification, the height of water conduction fracture zone determined by underground water pressure test, drilling peeping and numerical simulation was in good agreement with the actual situation, which could be used as the basis for water prevention and control.

Key words： water conduction fracture zone water pressure test drilling peeping numerical simulation paleogene aquifer mine water damage

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	Articles by authors
	Yu Zhibiao1
	Zhao Baofeng2
	3
	Li Debin2
	3
	Zhang Zeyuan2
	3

Cite this article:

Yu Zhibiao1,Zhao Baofeng2,3等. Height detection of water conduction fracture zone in working face under thick Paleogene aquifer[J]. CCI, 2023, 46(4): 67-71.

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2023.04.017 OR http://www.mtyhg.com.cn/EN/Y2023/V46/I4/67

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