Optimization of time sequence controlled pre-splitting blasting parameters and its application

Ye Haiwang; Tang Ke; Wan Tao; Wang Chao; Lei Tao; Li Xinping; C.M. Saliou

doi:10.11883/1001-1455(2017)03-0502-08

Volume 37 Issue 3

Apr. 2017

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Ye Haiwang, Tang Ke, Wan Tao, Wang Chao, Lei Tao, Li Xinping, C.M. Saliou. Optimization of time sequence controlled pre-splitting blasting parameters and its application[J]. Explosion And Shock Waves, 2017, 37(3): 502-509. doi: 10.11883/1001-1455(2017)03-0502-08

Citation:

Ye Haiwang, Tang Ke, Wan Tao, Wang Chao, Lei Tao, Li Xinping, C.M. Saliou. Optimization of time sequence controlled pre-splitting blasting parameters and its application[J]. Explosion And Shock Waves, 2017, 37(3): 502-509. doi: 10.11883/1001-1455(2017)03-0502-08

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Optimization of time sequence controlled pre-splitting blasting parameters and its application

doi: 10.11883/1001-1455(2017)03-0502-08

Ye Haiwang^{1, 2},
Tang Ke¹,
Wan Tao¹,
Wang Chao¹,
Lei Tao^{1, 2
,
,},
Li Xinping³,
C.M. Saliou¹

1.
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
2.
Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, Hubei, China
3.
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China

Received Date: 2015-11-09
Rev Recd Date: 2016-04-11
Publish Date: 2017-05-25

Abstract

Abstract

In view of the underground powerhouse excavation work by blasting at the Baihetan Hydropower Station Project, in order to reduce the blasting-involved damage to the rock mass, numerical simulation and field test were carried out to analyze the influence of the initiation delay time and the distance between later detonated holes on the blasting and the cracking with time sequence controlled pre-splitting blasting, and the reasonable delay time and the optimum distance between post-detonated holes were obtained. The results show that when the hole diameter is 42 mm and the distance between the pre-detonated holes is 35 cm, the reasonable initiation delay time is 75~100 μs, and the optimum distance between the post-detonated holes is 70cm, with joint consideration of the blasting energy's utilization ratio and blasting effect. It is found that time sequence controlled pre-splitting blasting, used scientifically, is a safe and efficient method to excavate the rock mass close to the underground powerhouse wall, which can reduce the load of blasting, cut down on the explosives used, and limit the blasting-involved damage to rock mass.
- time sequence controlled pre-splitting blasting,
- initiation delay time,
- distance between later detonated holes,
- field test

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References(16)

References

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