地下厂房硬性结构面切割围岩体爆破振动特性研究

doi:10.13722/j.cnki.jrme.2023.0017

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Abstract To study the blasting vibration characteristics of surrounding rock mass cut by multi-hard structural planes，a field test study was carried out based on the underground powerhouse of Tuoba Power Station. Firstly，the characteristics of rock with hard structural planes and the site construction conditions were analyzed. Then，based on the engineering site conditions，a blasting vibration test program was designed for the underground powerhouse and a blasting vibration field monitoring test was carried out. The study shows that the attenuation law of peak vibration velocity in surrounding rock cut by multi-hard structural planes is jointly affected by the proportional distance(the cube root of the blast core distance to the explosive quantity) and the structural plane dip angle. A significant nonlinear relationship is showed among them. Also，the influence of structural plane dip angle on the blasting vibration characteristics was focused on. The blasting vibration law of the surrounding rock mass about different dip angles of single structural plane and the proportional distance was studied. Thus，the corresponding calculation formula was proposed. With these results，based on the theory of safe vibration velocity，the safe distance of the surrounding rock cut by multi-hard structural planes in the underground powerhouse was studied. Finally，the study results were practiced for engineering application.

Key words： hydraulic engineering underground powerhouse multi-hard structural planes cut surrounding rock mass blasting vibration characteristics field monitoring safe distance

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	Articles by authors
	YIN Qinghua1
	2
	YANG Fanjie2
	ZHOU Hui2
	LIU Jinshan3
	ZHANG Chuanqing2
	LIU Pengcheng4
	WANG Xueqing1
	5

Cite this article:

YIN Qinghua1,2,YANG Fanjie2, et al. Study on blasting vibration characteristics of surrounding rock mass under hard structural planes cutting in underground powerhouse[J]. , 2023, 42(12): 3056-3069.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0017 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I12/3056

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