单、双临空面岩塞爆破的贯穿机制与试验研究

doi:10.13722/j.cnki.jrme.2015.1388

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Abstract Investigating the rock plug blasting technology is of great significance in engineering reconstruction or accident emergency rescue. At first，the through mechanism is analyzed by describing the stress field of the rock plug blasting with single and double free surfaces. Based on the secondary development of LS-DYNA，numerical simulation of the rock plug blasting with single and double free surfaces was implemented. Result reveals that the through depth of rock plug blasting with single free surface is little than that with double free surfaces，and the former is close to the half of latter. Experiment of rock plug blasting with single and double free surfaces was carried out three times. Results demonstrate that when the depth of rock plug blasting with single are 6.5 m and 8 m，the through depth are about 4.5 m and 6 m，But when the depth of the rock plug blasting with double free surfaces is 11 m，the rock plug could be through completely. Results of experiment and numerical simulation support each other，which reveals that the because of the suppress system and the tensile stress wave from the free surface，the through depth of rock plug blasting with single free surface is close to the half of that of the rock plug blasting with double free surfaces. Results expect to provide the reference of the similar engineering.

Key words： rock mechanics blasting rock plug free surface damage

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	Articles by authors
	HU Yingguo
	WU Xinxia
	ZHAO Gen
	LIU Meishan
	ZHOU Xianping
	LI Weichao

Cite this article:

HU Yingguo,WU Xinxia,ZHAO Gen, et al. Through mechanism and experimental study of rock-plug blasting with single and double free faces[J]. , 2016, 35(S2): 3716-3724.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1388 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/3716

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