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ORIGINAL RESEARCH article

Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 12 - 2024 | doi: 10.3389/feart.2024.1445990
This article is part of the Research Topic Failure Analysis and Risk Assessment of Natural Disasters Through Machine Learning and Numerical Simulation: Volume IV View all articles

Study on fragmentation characteristics of rock mass in bench blasting with different coupling media

Provisionally accepted
Tong Li Tong Li 1,2Ming Chen Ming Chen 3*Bo-Wen Guo Bo-Wen Guo 1,2*Li Song Li Song 1,2*Bing Fan Bing Fan 1,2*Shan-Shan Cui Shan-Shan Cui 1,2*
  • 1 Yellow River Institute of Hydraulic Research, Zhengzhou, China
  • 2 Research Center for Seawall Safety and Storm Surge Disaster Prevention and Mitigation, Nanjing Hydraulic Research Institute, Zhengzhou, China
  • 3 State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei Province, China

The final, formatted version of the article will be published soon.

    The fragmentation size distribution is an important index to evaluate blasting effect. Based on stress wave theory, a blasting fragmentation distribution model is established, and the key influencing factors were clarified. Then, the distribution characteristics of rock fragmentation in water-coupled blasting and air-coupled blasting were compared and verified by numerical simulation and field test. The results show that the rock blasting fragmentation size is negatively correlated with borehole pressure and unit explosive consumption when blasting rock is determined. The existence of water slows down the attenuation of blasting load, prolongs the duration, and makes the blasting pressure transmitted to hole wall significantly greater than air-coupled one, which is equivalent to increasing the unit explosive consumption.Moreover, the rock fracture development speed and fragmentation degree of water-coupled blasting is significantly higher than air-coupled blasting. Comprehensively determined in same charging parameters, water-coupled blasting compared with air-coupled blasting can improve the degree of rock fragmentation, the average size of rock after blasting is smaller, more uniform particle size distribution. The research results for the control of blasting and optimization of explosive energy utilization have important reference significance.

    Keywords: Rock Blasting, Decoupling charge, Coupling medium, Fragmentation size, Borehole pressure, unit explosive consumption

    Received: 08 Jun 2024; Accepted: 12 Jul 2024.

    Copyright: © 2024 Li, Chen, Guo, Song, Fan and Cui. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Ming Chen, State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, 430072, Hubei Province, China
    Bo-Wen Guo, Yellow River Institute of Hydraulic Research, Zhengzhou, China
    Li Song, Yellow River Institute of Hydraulic Research, Zhengzhou, China
    Bing Fan, Yellow River Institute of Hydraulic Research, Zhengzhou, China
    Shan-Shan Cui, Yellow River Institute of Hydraulic Research, Zhengzhou, China

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