Detonation Crack Propagation Behavior of Short Delay Blasting Between Holes

XU Peiliang; HOU Kepeng

doi:10.13779/j.cnki.issn1001-0076.2024.04.001

2024 Vol. 44, No. 4

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XU Peiliang, HOU Kepeng. Detonation Crack Propagation Behavior of Short Delay Blasting Between Holes[J]. Conservation and Utilization of Mineral Resources, 2024, 44(4): 1-8. doi: 10.13779/j.cnki.issn1001-0076.2024.04.001

Citation:

XU Peiliang, HOU Kepeng. Detonation Crack Propagation Behavior of Short Delay Blasting Between Holes[J]. Conservation and Utilization of Mineral Resources, 2024, 44(4): 1-8. doi: 10.13779/j.cnki.issn1001-0076.2024.04.001

Detonation Crack Propagation Behavior of Short Delay Blasting Between Holes

XU Peiliang^1,,
HOU Kepeng^2, ,

1.
Datun Tin Mine, Yunnan Tin lndustry Co., Ltd. , Gejiu 661000, Yunnan, China
2.
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

More Information

Corresponding author: HOU Kepeng, 496172617@qq.com

Received Date: 24 May 2024

Accepted Date: 24 May 2024

Publish Date: 15 August 2024

Abstract

Abstract

In order to understand the influence of the delay time between holes on the rock breaking effect of different rocks, a numerical model of double−hole blasting was established by means of numerical simulation using limestone from a mine as an example, and 34 parameters of the RHT constitutive model of limestone were calibrated. The simulation results showed that the stress enhancement phenomenon increased with the increase of delay time, but when Δt increased to 80 μs, the stress enhancement caused by the superposition between holes can be ignored. The crack propagation area of the pre−blasting hole increased with the increase of the delay time, the crack propagation area of the post−blasting hole decreased with the decrease of the delay time, and the width of the crack propagation between the holes increased with the increase of the delay time. The research results provide a design basis for the popularization and application of the precise delay performance of digital detonators.
- limestone /
- RHT constitutive model /
- inter hole delay blasting /
- stress superposition /
- crack propagation

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References

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