Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent Blastholes
A deep understanding of the crack formation mechanism between blastholes had great significance for improving the energy utilization rate of explosives. From the perspective of static mechanics of stress wave theory, this paper theoretically derived the stress distribution on the blasthole connectin...
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Hindawi Limited
2020-01-01
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Series: | Shock and Vibration |
Online Access: | http://dx.doi.org/10.1155/2020/8816059 |
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doaj-54d291a3c4c9418c9717ba560703a9932020-11-25T04:01:06ZengHindawi LimitedShock and Vibration1875-92032020-01-01202010.1155/2020/88160598816059Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent BlastholesYi Li0Jie Cao1Xianfeng Chen2Chuyuan Huang3Qi Zhao4School of Safety Science and Emergency ManagementQinghai Qingle Chemical Machinery Co., Ltd.School of Safety Science and Emergency ManagementSchool of Safety Science and Emergency ManagementSchool of Safety Science and Emergency ManagementA deep understanding of the crack formation mechanism between blastholes had great significance for improving the energy utilization rate of explosives. From the perspective of static mechanics of stress wave theory, this paper theoretically derived the stress distribution on the blasthole connecting. It was proven that the stress at the midpoint of the blasthole connecting was not the maximum. The analysis results contradicted the original theoretical results. Moreover, the finite element software LS-DYNA was used to numerically simulate the crack formation between adjacent blastholes in infinite rock media. The fluid-solid coupling method was used to simulate the effect of stress wave and detonation products on rocks. The simulation results were consistent with the actual situation and they showed that cracks were formed in the blastholes wall firstly. Stress wave superposition was not the main reason for crack penetration. Stress wave reflection stretching at the crack tip was vital for crack penetration.http://dx.doi.org/10.1155/2020/8816059 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yi Li Jie Cao Xianfeng Chen Chuyuan Huang Qi Zhao |
spellingShingle |
Yi Li Jie Cao Xianfeng Chen Chuyuan Huang Qi Zhao Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent Blastholes Shock and Vibration |
author_facet |
Yi Li Jie Cao Xianfeng Chen Chuyuan Huang Qi Zhao |
author_sort |
Yi Li |
title |
Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent Blastholes |
title_short |
Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent Blastholes |
title_full |
Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent Blastholes |
title_fullStr |
Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent Blastholes |
title_full_unstemmed |
Numerical Investigation on Crack Formation and Penetration Mechanism between Adjacent Blastholes |
title_sort |
numerical investigation on crack formation and penetration mechanism between adjacent blastholes |
publisher |
Hindawi Limited |
series |
Shock and Vibration |
issn |
1875-9203 |
publishDate |
2020-01-01 |
description |
A deep understanding of the crack formation mechanism between blastholes had great significance for improving the energy utilization rate of explosives. From the perspective of static mechanics of stress wave theory, this paper theoretically derived the stress distribution on the blasthole connecting. It was proven that the stress at the midpoint of the blasthole connecting was not the maximum. The analysis results contradicted the original theoretical results. Moreover, the finite element software LS-DYNA was used to numerically simulate the crack formation between adjacent blastholes in infinite rock media. The fluid-solid coupling method was used to simulate the effect of stress wave and detonation products on rocks. The simulation results were consistent with the actual situation and they showed that cracks were formed in the blastholes wall firstly. Stress wave superposition was not the main reason for crack penetration. Stress wave reflection stretching at the crack tip was vital for crack penetration. |
url |
http://dx.doi.org/10.1155/2020/8816059 |
work_keys_str_mv |
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