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<p>This study proposes an in situ visualization method to investigate the dynamic fracturing behavior in axial decoupled charge blasting with water deck. Results demonstrated that blast-induced cracks initiated earlier at water-deck position and exhibited accelerated radial propagation, with the water-deck significantly enhancing crack velocity and fragmentation efficiency. The dual-end water-deck configuration achieved a peak initial crack velocity of 248.62 m/s and a maximum damage index of 1.668. Calibrated polymethacrylates model parameters enabled numerical simulation of blasting-induced dynamic fracture incorporating water-deck effects. Under explosive loading, the water-deck induced stress concentration and enhanced energy transfer efficiency. Compared with traditional charge structure, internal energy increased by 23.3 to 26.6% and blasting damage effect was improved by 29.47 to 54.97%. These findings provide more effective guidance for precision-controlled blasting in deep mining and tunneling.</p>

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Effect of Water-Deck Length on Blast-Induced Crack Propagation in Axial Decoupled Charges

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Guokang Song,
  • Renshu Yang,
  • Peng Xu,
  • Zhiyong Liu,
  • Zhen Liu,
  • Boyang Zhai

摘要

This study proposes an in situ visualization method to investigate the dynamic fracturing behavior in axial decoupled charge blasting with water deck. Results demonstrated that blast-induced cracks initiated earlier at water-deck position and exhibited accelerated radial propagation, with the water-deck significantly enhancing crack velocity and fragmentation efficiency. The dual-end water-deck configuration achieved a peak initial crack velocity of 248.62 m/s and a maximum damage index of 1.668. Calibrated polymethacrylates model parameters enabled numerical simulation of blasting-induced dynamic fracture incorporating water-deck effects. Under explosive loading, the water-deck induced stress concentration and enhanced energy transfer efficiency. Compared with traditional charge structure, internal energy increased by 23.3 to 26.6% and blasting damage effect was improved by 29.47 to 54.97%. These findings provide more effective guidance for precision-controlled blasting in deep mining and tunneling.