深井冲击煤层充填工作面区段煤柱宽度研究

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Abstract To improve the reliability of rockburst prevention in the filling face of a deep coal seam and to ensure the stability of the surrounding rock structure in the stope and achieve safe mining，this study focuses on a filling face in a deep well with super-high water content in Shandong，China. Through a combination of theoretical analysis，numerical simulation，and field measurement，the spatial structure model and stability of the“goaf-coal pillar-key strata”T-type overlying rock structure during gob-side entry retaining mining were investigated. Furthermore，the reasonable coal pillar width considering both rockburst prevention and water-retaining performance of the filling body was explored. The results indicate that：(1) the coal pillar can effectively“isolate”the goaf and provide support to the key strata and their overlying spatial structure，under the conditions that meet the fracture line of the roof strata and the supporting strength factors. (2) The“goaf-coal pillar-key strata”forms an approximately T-shaped overlying rock spatial structure. The horizontal and vertical structures of this T-shaped model primarily undergo flexural and compressive deformation，respectively，with the coal pillar being the main structure controlling the stability of the T-type model. (3) The stability of the coal pillar in the filling face is mainly related to the static(dynamic) average supporting stress and its own bearing strength R. The overall impact-induced instability criterion or was established，based on which the reasonable width of the coal pillar was determined to be 10 meters. The theoretical model?s validity and the reliability of the analysis results were verified through field monitoring of microseismic activity，stress，and surface subsidence. The findings provide theoretical and practical value for the design of coal pillar width and rockburst prevention in the filling face of deep coal seams.

Key words： mining engineering deep mining spatial structure of overburden rock rock burst section coal pillar filling working face

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	Articles by authors
	ZHANG Ming1
	2
	3
	WEI Kaixiang1
	NIAN Bin3
	JIANG Fuxing4
	WANG Kun3
	ZHU Haihu1
	HU Hao1

Cite this article:

ZHANG Ming1,2,3, et al. Study on the width of section coal pillar in filling face of coal seam with rockburst hazards in deep mine[J]. , 2025, 44(2): 316-330.

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https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I2/316

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