微差时间及柱状装药特征对爆破振动效应影响研究

doi:10.13722/j.cnki.jrme.2017.1163

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Abstract

In order to study the blasting vibration effect influenced by charging characteristics and millisecond time，the local amplification effect of blasting vibration velocity in double-hole blasting is discussed by analyzing the characteristics of vibration wave generated by finite length cylindrical charge. Meanwhile，the particle vibration effects of rock induced by long cylindrical charging characteristics and different initiation modes are analyzed. The effects of charge length，explosive detonation velocity，charge depth，initiation mode and rock characteristics on the blasting vibration are obtained. Besides， the peak particle velocity of long cylindrical charge is fitted with the Sadov¢s formula. The results show that the magnitude and scope of the local enlargement are closely related to the millisecond time and blasting attenuation coefficient. The blasting vibration velocity would no longer increase when the charge length increases to a certain extent for the measuring point below the top of the charge. Besides，the effect of detonation velocity on blasting vibration is only limited in a certain velocity range. For the measuring point above the top of the charge，the particle velocity on the surface grows bigger with the increasing of charging buried depth. For different initiation modes，the peak particle velocity is the maximum at bottom initiation， the second is both ends initiation，and the peak particle velocity is the minimum at top initiation. When the measuring point is closer to the source，the more obvious vibration affected by the rock characteristics change. The fitted Sadov¢s formula of cylindrical charge can well indicate the peak velocity characteristic of the blasting vibration of cylindrical charge. The fitted Sadov's formula of spherical charge cannot denote the vibration characteristic of cylindrical charge.

Key words： blasting engineering cylindrical charge millisecond blasting blasting vibration wave peak particle velocity vibration characteristics

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	Articles by authors
	CHEN Shihai1
	2
	HU Shuaiwei1
	CHU Shaofeng1

Cite this article:

CHEN Shihai1,2,HU Shuaiwei1, et al. Study on the blasting vibration effect influenced by millisecond time and cylindrical charging characteristics[J]. , 2017, 36(S2): 3974-3983.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1163 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS2/3974

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