TY - JOUR
T1 - Study on the effects of double-primer initiation on rock damage and stress evolution
AU - You, Shuai
AU - Yang, Renshu
AU - Zhang, Xiang
AU - Ding, Chenxi
AU - Xiao, Chenglong
AU - Zhao, Yong
AU - He, Songlin
AU - Tian, Haofan
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer-Verlag GmbH Germany, part of Springer Nature 2026.
PY - 2026/8
Y1 - 2026/8
N2 - The initiation method significantly influences the fracture mechanism of rock blasting during the blasting process. This study employs Computed Tomography(CT) scanning technology, multi-fractal theory, and numerical simulations to investigate the collision and energy-focusing effects of detonation waves during double-primer initiation within blastholes through field applications. It reveals the impact of initiation point locations on the blasting effectiveness of rock fragmentation. The results indicated that the multi-fractal spectrum width Δα of specimens subjected to double-primer initiation exceeds those with single initiation points, indicating enhanced rock fragmentation and a higher degree of rock damage due to the superposition and collision of explosive stress waves. This superposition alters the spatial distribution and allocation of explosive energy within the blastholes after detonation, improving the utilization efficiency of explosive energy. In addition, the mutual collision of detonation waves increases the wavefront pressure at the collision points, enhancing the local rock fragmentation effect. Numerical simulations show that the peak stress in the charged area is significantly greater than in the uncharged area, and at the same measurement point, peak stress is lower in specimens with single initiation points compared to those with double initiation points. In addition, adjusting the positions of initiation points within blastholes can improve post-blast stress distribution.
AB - The initiation method significantly influences the fracture mechanism of rock blasting during the blasting process. This study employs Computed Tomography(CT) scanning technology, multi-fractal theory, and numerical simulations to investigate the collision and energy-focusing effects of detonation waves during double-primer initiation within blastholes through field applications. It reveals the impact of initiation point locations on the blasting effectiveness of rock fragmentation. The results indicated that the multi-fractal spectrum width Δα of specimens subjected to double-primer initiation exceeds those with single initiation points, indicating enhanced rock fragmentation and a higher degree of rock damage due to the superposition and collision of explosive stress waves. This superposition alters the spatial distribution and allocation of explosive energy within the blastholes after detonation, improving the utilization efficiency of explosive energy. In addition, the mutual collision of detonation waves increases the wavefront pressure at the collision points, enhancing the local rock fragmentation effect. Numerical simulations show that the peak stress in the charged area is significantly greater than in the uncharged area, and at the same measurement point, peak stress is lower in specimens with single initiation points compared to those with double initiation points. In addition, adjusting the positions of initiation points within blastholes can improve post-blast stress distribution.
KW - CT scanning technology
KW - Damage
KW - Double-primer initiation
KW - Multi-fractal theory
KW - Stress
UR - https://www.scopus.com/pages/publications/105045244643
U2 - 10.1007/s10064-026-05175-9
DO - 10.1007/s10064-026-05175-9
M3 - Article
AN - SCOPUS:105045244643
SN - 1435-9529
VL - 85
JO - Bulletin of Engineering Geology and the Environment
JF - Bulletin of Engineering Geology and the Environment
IS - 8
M1 - 515
ER -