无煤柱自成巷短臂梁顶板补偿支护力设计方法及其影响因素分析

doi:10.13722/j.cnki.jrme.2022.0500

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Abstract In order to realize the safety and stability of the short arm beam roof structure in non-pillar mining with automatically formed roadway. The balance mechanism and dynamical evolution of the roof structure of the short-arm beam are analyzed，and the mechanism of compensating the support of the anchor cable is clarified. The Hoek-Brown strength criterion and the upper bound analysis method in plastic mechanics are used to analyze the caving failure mechanism of the surrounding rock of the short arm beam roof under the support of the anchor cable. Therefore，the calculation formula of anchor cable compensation support force of short arm beam roof in three stages of caving friction, dynamic pressure effect and roadway stability is deduced. In addition，a method for compensating the support force of a short arm beam roof in a self-forming roadway without coal pillars is developed. On this basis，the sensitivity analysis index is established and the influence of different parameters on the compensation support force of the anchor cable is analyzed. It is demonstrated that the surrounding rock stress，roof cutting parameters and roadway width are the main control factors for cable compensation support forces，with the surrounding rock stress being the most sensitive metric. Thus，the engineering suggestions for the stability control of short arm beam roof are put forward. The research results were applied in the transportation roadway of 5101 working face of N00 mining method in Xintai Coal Mine，and good effect of field application was verified.

Key words： mining engineering non-pillar mining with automatically formed roadway roof-cut short arm beam upper bound method anchor cable design influence factor

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	Articles by authors
	YANG Jun1
	LIU Ben1
	ZHOU Peng1
	HUANG Long2
	ZHANG Jun1
	HOU Shilin1
	WANG Yajun1
	3
	CHEN Fei4

Cite this article:

YANG Jun1,LIU Ben1,ZHOU Peng1, et al. Design method of compensation support force of short arm beam roof in non-pillar mining with automatically formed roadway and #br# its influencing factors analysis[J]. , 2023, 42(4): 798-809.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0500 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I4/798

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