深埋沿空留巷采动变形特征及应力分布规律探索

doi:10.13722/j.cnki.jrme.2017.1110

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Abstract China has a rich reserve of deep coal resources，but the deformation instability of the roadway，as an important factor，restricts the efficient exploitation of the deep resources. The purpose of this paper is to study the convergence deformation and the stress distribution of the deep roadway during coal mining，and to evaluate the effect of bolt support. On the JI 14–31050 working face of the No. 12 mine of China Pingmei Shenma Group，long-term monitoring of roadway deformation and roof bolt stress is carried out by using the convergence instrument and the bolt stress gauge. The stress distribution and deformation characteristics of the whole working face during the mining process are analyzed by finite difference method. The results show that：(1) In the first stage of mining，the roof of roadway can be divided into five areas according to the stress of bolt and the convergence curve of roadway. (2) During the period of with drawl，the anchor stress curve shows the common single-peak curve，and there still exists double-peak curve，multi-peak curve and stress failure recovery curve. (3) By comparing the bolt preload and peak tension，the range of reasonable pre-tightening force is 50–70 kN. The research results of this paper have reference value for the support design of the tunnel in the kilometer deep mine.

Key words： mining engineering gob-side entry retaining roadway deformation stress distribution

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	Articles by authors
	WANG Wenyong1
	2
	GAO Mingzhong1
	2
	WANG Man3
	4
	XIE Jing1
	2
	LIU Qiang1
	2
	LI Anqiang1
	2
	CHEN Hailiang1
	2

Cite this article:

WANG Wenyong1,2,GAO Mingzhong1, et al. Study on characteristics of deformation and stress distribution of gob-side entry retaining in the ultra-deep mine[J]. , 2019, 38(S1): 2955-2963.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1110 OR http://rockmech.whrsm.ac.cn/EN/Y2019/V38/IS1/2955

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