BLASTING, Volume. 41, Issue 4, 18(2024)

Study on Attenuation Law of Axial and Radial Explosion Stress Wave with Different Charge Structures in Concrete

GUO Zhi-dong1... LI Guang1, ZHU He-chao1, HU Shi-chao1, ZUO Jin-jing2 and YOU Shuai3 |Show fewer author(s)
Author Affiliations
  • 1Ansteel Cornerstone Mining Corporation, Limited, Anshan 114047, China
  • 2School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 3School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
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    To explore the attenuation law of blasting stress waves in concrete under different charging structures, the strain values at different positions of the experimental models were tested by a 16-channel dynamic strain gauge based on similarity theory. Meanwhile, the attenuation law of axial and radial blast stress waves in concrete under different charge structures was obtained by calculating the peak stress. The results show that the blasting stress wave exhibits a power exponential decay as the distance between the blasting centers increases. The initial pressure and maximum pressure on the borehole wall of the coupled charge structure are the highest, and the detonation wave acts on the medium for a short time. The uncoupled charge structure reduces the initial pressure on the borehole wall and prolongs the time of detonation pressure action. The coupled charging structure consumes much energy in the crushing zone, and the energy transfer is uneven. The stress wave attenuation of the uncoupled charging structure during blasting is slow, and the energy transfer is uniform.

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    GUO Zhi-dong, LI Guang, ZHU He-chao, HU Shi-chao, ZUO Jin-jing, YOU Shuai. Study on Attenuation Law of Axial and Radial Explosion Stress Wave with Different Charge Structures in Concrete[J]. BLASTING, 2024, 41(4): 18

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    Paper Information

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    Received: Apr. 1, 2024

    Accepted: Jan. 3, 2025

    Published Online: Jan. 3, 2025

    The Author Email:

    DOI:10.3963/j.issn.1001-487x.2024.04.003

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