Relation between Crack Propagation and Decoupling Charging Coefficient in Deep Rock Blasting

CHEN Xiaolin; ZHANG Zhiyu; WANG Kai; PENG Lei

doi:10.11858/gywlxb.20230649

Volume 37 Issue 5

Nov 2023

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Chinese Journal of High Pressure Physics > 2023 > 37(5): 054203.

ZHOU Weixiao, WANG Yajun, YU Jiaxin, ZHU Xinyuan, LI Weibing. Effect of Initial Detonation Method on Damage Power of Composite Warhead[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 015101. doi: 10.11858/gywlxb.20200593

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CHEN Xiaolin, ZHANG Zhiyu, WANG Kai, PENG Lei. Relation between Crack Propagation and Decoupling Charging Coefficient in Deep Rock Blasting[J]. Chinese Journal of High Pressure Physics, 2023, 37(5): 054203. doi: 10.11858/gywlxb.20230649

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Relation between Crack Propagation and Decoupling Charging Coefficient in Deep Rock Blasting

doi: 10.11858/gywlxb.20230649

CHEN Xiaolin^1
,,
ZHANG Zhiyu^{1,*
,
,},
WANG Kai²,
PENG Lei¹

1.
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
2.
Faculty of Public Security and Emergency Management, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

Received Date: 24 Apr 2023
Rev Recd Date: 15 May 2023
Accepted Date: 29 May 2023

Available Online: 09 Oct 2023

Issue Publish Date: 07 Nov 2023

Abstract

Abstract

Through numerical simulation, the relation between the crack propagation during deep rock blasting and the decoupling charge coefficient under the conditions of in-situ stress or not was studied. The simulation results showed that the initial ground stress has a great influence on the generation and the propagation of blasting cracks. The radius of the crushing zone, the radius of the crack zone, the maximum length of radial crack propagation, and the peak stress of the blast hole wall all decrease with the increase of the decoupling coefficient. According to the radial crack propagation lengths under different decoupling coefficients obtained by dynamic caustic similarity test, a relation between the radial crack propagation length and the decoupling coefficient was established, and the degree of fit reaches 0.974. During the process of deep rock blasting excavation, the blasting parameters can be designed according to the relation between the radial crack propagation length and the decoupling coefficient, so as to realize high efficiency blasting mining. This study provides some reference for the background of deep mining.
- deep rock mass,
- decoupling charging coefficient,
- crack propagation,
- dynamic caustic similarity test

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References

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Relation between Crack Propagation and Decoupling Charging Coefficient in Deep Rock Blasting

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Relation between Crack Propagation and Decoupling Charging Coefficient in Deep Rock Blasting

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