深埋隧洞爆破开挖地应力瞬态卸荷诱发围岩振动控制方法研究

doi:10.13722/j.cnki.jrme.2018.0570

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Abstract During blasting excavation of deep tunnels，the rapid in-situ stress release occurring on blast-created free surfaces is one of the major dynamic disturbances. For a deep circular tunnel which is excavated with the full-face millisecond-delay blasting method，the mechanism and influence factors of rock vibration induced by the transient unloading was analyzed，and vibration control methods were discussed in detail from the perspectives of cutting modes，blasthole arrangements and initiation sequences. The results show that properly designing drilling and blasting parameters can reduce initial stress levels on the excavation surfaces，prolong the duration of the transient unloading and reduce sizes of the excavation surfaces，and that，as a result，rock vibration induced by the transient unloading can be effectively controlled. The research work can be applied to blasting construction of deep tunnels in the industries of deep resource exploitation and deep space utilization.

Key words： blasting mechanics deep tunnels blasting in-situ stresses transient unloading vibration controlling

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	Articles by authors
	YANG Jianhua1
	WU Zenan1
	JIANG Shuihua1
	YAO Chi1
	LU Wenbo2
	ZHOU Chuangbing1

Cite this article:

YANG Jianhua1,WU Zenan1,JIANG Shuihua1, et al. Study on controlling methods for transient unloading inducing rock vibration due to blasting excavation of deep tunnels[J]. , 2018, 37(12): 2751-2761.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0570 OR http://www.rockmech.org/EN/Y2018/V37/I12/2751

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