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Volume 40 Issue 10
Oct 2026
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Chinese Journal of High Pressure Physics  > 2026  >  40(10): 105302.
GONG Yue, SU Hong, LIU Buqing, PAN Yan, WANG Cunguo, SUN Jinshan. Coupling Mechanism of Wall Protection Blasting and Notched Blasting[J]. Chinese Journal of High Pressure Physics, 2026, 40(10): 105302. doi: 10.11858/gywlxb.20251238
Citation: GONG Yue, SU Hong, LIU Buqing, PAN Yan, WANG Cunguo, SUN Jinshan. Coupling Mechanism of Wall Protection Blasting and Notched Blasting[J]. Chinese Journal of High Pressure Physics, 2026, 40(10): 105302. doi: 10.11858/gywlxb.20251238
shu

Coupling Mechanism of Wall Protection Blasting and Notched Blasting

doi: 10.11858/gywlxb.20251238
  • 1.

    State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, Hubei, China

  • 2.

    Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, Hubei, China

  • 3.

    School of Chemical and Blasting Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China

  • 4.

    China Railway Fourth Survey and Design Institute Group Co., Ltd., Wuhan 430056, Hubei, China

  • 5.

    School of Digital Construction and Blasting Engineering, Jianghan University, Wuhan 430056, Hubei, China

  • Received Date: 24 Oct 2025
  • Rev Recd Date: 16 Dec 2025
    • Available Online: 24 Dec 2025
  • Issue Publish Date: 22 Oct 2026
    Abstract
  • In order to improve the blasting contour accuracy and surrounding rockprotection under complex geological conditions, comparative experiments of protective blasting and protective notched-coupling blasting were conducted using a digital laser dynamic caustic experimental system and polymethyl methacrylate specimens. The crack propagation mechanisms and mechanical response characteristics of the two blasting modes were systematically investigated. The results show that in the protective notched-coupling blasting, the main crack propagates stably along the preset notched direction, demonstrating effective directional control. Meanwhile, the secondary peak value of the crack-tip stress intensity factor is significantly higher than that of the single protective blasting, indicating a stronger dynamic stress concentration effect. The notched-coupling blasting not only achieves a higher overall crack propagation velocity with slower attenuation at later stages, but also exhibits greater persistence and stability. In addition, this blasting mode effectively reduces the length and number of cracks on the protected wall side, thereby providing better rock-mass protection. The study reveals that the protective notched-coupling blasting optimizes crack propagation behavior and improves the directionality and energy utilization efficiency of blasting through the combined mechanisms of notch guidance and energy re-concentration. These findings provide theoretical support and technical guidance for precision blasting design and engineering applications in deep rock masses.

     

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