冻结岩壁爆破振动及损伤特性试验研究

doi:10.13722/j.cnki.jrme.2015.0603

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Abstract

The model test is an effective method of the study on vibration and damage characteristics of the frozen wall in the process of blasting excavation. This physical model test scheme was designed in accordance with similarity theory. The frozen model was excavated by blasting，meanwhile，recorded the vibration information of key points. The regression analysis determined the fitting formula of velocity and main frequency，as well as the relationship between the main frequency and the peak velocity. Using the predictive value of the main frequency to back calculate vibration velocity of the appointed points on the frozen wall，compared with the blasting allowable safety vibration velocity from Blasting Safety Regulation(GB 6722—2014)，The results show that the vibration regularity meet the Sadov¢s formula and the frequency meet the similarity criterion formula. Then the velocity and frequency attenuation characteristic of frozen wall is obtained. On the basis of field test results，it is feasible to evaluate rock damage based on the blasting allowable safety vibration velocity. The problem of the safety evaluation of the frozen wall after quantitative consideration of the main frequency effects was solved. The conclusions can provide some scientific references for frozen rock blasting in shaft for the similar strata.

Key words： mining engineering frozen wall model test blasting frequency vibration velocity damage

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	Articles by authors
	SHAN Renliang1
	2
	BAI Yao1
	SONG Liwei1
	3
	SONG Yongwei1

Cite this article:

SHAN Renliang1,2,BAI Yao1, et al. Experimental Study of Blasting Vibration AND DAMAGE Characteristics on frozen Shaft wall[J]. , 2015, 34(S2): 3732-3741.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0603 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/3732

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