爆生自由面对边坡微差爆破诱发振动峰值的影响

doi:10.13722/j.cnki.jrme.2015.1499

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Abstract Studies on the influence of blast-created free face on ground vibration in slope blasts with millisecond-delays are very significant for optimization and safety control in blasting excavation. A multiple-row bench blast test at Baihetan Hydropower Station was conducted to compare the blast-induced ground vibration from the first and followed delay in the same row. A SPH-FEM coupled model was also developed to simulate the fragmentation process and the blasting vibrations from different delays in the same row. The simulated results agreed well with the experiment results. If the charge weight and the blasting geometry parameters were the same in each blast delay，the ground vibration induced by the first delay will be larger than that of the followed one. The study indicated that the effect of the blast-created free face should be considered in the blasting design. From the perspective of vibration control，the charge weight of the first delay in every row should be less than that of the followed delays in the same row.

Key words： slope engineering blast-created free face blast experiment peak particle velocity

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	Articles by authors
	LENG Zhendong1
	2
	LU Wenbo1
	2
	HU Haoran1
	2
	XIE Lixiang1
	2
	CHEN Ming1
	2

Cite this article:

LENG Zhendong1,2,LU Wenbo1, et al. Studies on influence of blast-created free face on ground vibration in slope blasts with millisecond-delays[J]. , 2016, 35(9): 1815-1823.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.1499 OR http://www.rockmech.org/EN/Y2016/V35/I9/1815

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