城市地铁电子雷管爆破降振技术试验研究

doi:10.13722/j.cnki.jrme.2014.s2.043

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Abstract According to the problems of urban subway under-passing building closely，taking the Qingdao subway as engineering background，the electronic detonator tests with different forms of cut hole are carried out and the blasting vibration is monitored. The monitored results show that the delay time of electronic detonator is accurate，and the blasting vibration velocity can be controlled effectively by blasting hole by hole and disturbing the damping which is achieved by setting up the reasonable delay time of electronic detonator. Comparing the different forms of cut hole，when the parallel rhombus cut of empty hole is adopted，the empty hole as free surface could provide compensation space to reduce the clamping force and reduce the blasting vibration velocity. The test results prove that with the parallel rhombus cut of empty hole blasting，the time interval of cut holes should be greater than 30 ms，the time interval of satellite holes should be greater than 8 ms，and the time interval of periphery holes should be greater than 4 ms. With the wedge cut hole blasting，the time interval of cut holes should be greater than 3 ms，the satellite holes and periphery holes could be 8 ms，and the time interval of bottom holes should be greater than 4 ms. The comparison of particle vibration velocity in the three coordinate directions show that the vibration velocity in z direction is the biggest and it plays a dominating role in the vibration wave.

Key words： tunnelling engineering urban subway blasting vibration electronic detonator cutting pattern

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	Articles by authors
	YANG Renshu1
	2
	CHE Yulong1
	SUN Qiang1
	GAO Xiangtao1

Cite this article:

YANG Renshu1,2,CHE Yulong1, et al. EXPERIMENTAL STUDY OF DECREASING BLASTING VIBRATION TECHNOLOGY WITH DIGITAL DETONATOR IN URBAN SUBWAY[J]. , 2014, 33(S2): 3741-3750.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.043 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3741

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