浅孔爆破机制及其在厚层坚硬顶板沿空留巷中的应用

doi:10.13722/j.cnki.jrme.2014.1442

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Abstract In order to avoid large area roof weighting and other dynamic disasters for gob-side entry retaining with thick and hard roof，combined with geological conditions and engineering practice of gob-side entry retaining with hard roof in Xinchao Colliery，this paper uses theoretical analysis to expound the zone characteristics of shallow-hole blasting and gives out calculation formula of zones respectively. Also the numerical calculation software of LS-DYNA3D is used to establish a model for shallow-hole blasting，analyze the evolution law of the effective stress and confirm relevant parameters of shallow-hole blasting with theoretical calculation results. Based on these research results，control countermeasures have been proposed，which include shallow-hole blasting technology for immediate roof caving，roadside backfill body construction technology with high water material for main roof caving，and road-in support technology of combination bolt support with hydraulic prop support. The field practice and observations show that the application of shallow-hole blasting technology has achieved an expected effects for ground rock control

Key words： mining engineering shallow-hole blasting hard roof gob-side entry retaining roof cutting and pressure relief roadside backfill

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	Articles by authors
	ZHANG Zizheng1
	2
	BAI Jianbiao1
	2
	CHEN Yong2
	HAO Shengpeng1
	2

Cite this article:

ZHANG Zizheng1,2,BAI Jianbiao1, et al. Shallow-hole blasting mechanism and its application for gob-side entry retaining with thick and hard roof[J]. , 2016, 35(S1): 3008-3017.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1442 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3008

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