Rock and Soil Mechanics ›› 2025, Vol. 46 ›› Issue (10): 3267-3279.doi: 10.16285/j.rsm.2024.00573

• Numerical Analysis • Previous Articles     Next Articles

Rock cracking and evolution mechanism under the action of new type of arc-shaped charge blasting

XU Guo-qing1, HUANG Gao-xiang2, WANG Xie-kang1, LUO Deng-ze3, LI Hong-tao1, YAO Qiang1   

  1. 1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan 610065, China; 2. Sichuan Academy of Water Conservancy, Chengdu, Sichuan 610072, China; 3. Yalong River Hydropower Development Company, Ltd., Chengdu, Sichuan 610051 China
  • Received:2024-10-17 Accepted:2025-05-08 Online:2025-10-11 Published:2025-10-14
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2023YFC3008300, 2023YFC3008305), the Sichuan Provincial International Science and Technology Collaboration & Innovation Project (2025YFHZ0165), the National Natural Science Foundation of China (51809188) and the Joint Funds of National Natural Science Foundation of China (U2340201).

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Abstract: The application of shaped charge blasting in smooth blasting during chamber excavation is investigated. Based on the principle of shaped charge jets, an arc-shaped charge structure is proposed. Numerical modeling of arc-shaped charge blasting (ASCB) is established and compared with cone-shaped charge blasting (CSCB). The findings indicate that ASCB consumes 43.4% less explosive than CSCB, and the efficiency of ASCB in the charge direction surpasses that of CSCB by 25.97%. Upon reaching the blast-hole wall, the shock wave of ASCB is more concentrated than that of CSCB, facilitating the formation of initial cracks in the energy-gathering direction. The pressure exerted by ASCB on the energy-gathering side of the blast-hole wall is 6.26% higher than that of CSCB, whereas the pressure on the non-energy-gathering side is 37.34% lower. The crack length generated by ASCB in the energy-accumulation direction is approximately twice that of CSCB. Consequently, it is concluded that the shaped charge blasting effect of ASCB is superior to that of CSCB. These research outcomes offer a novel approach for directional presplitting blasting.

Key words: ANSYS/LS-DYNA, shaped charge blasting, numerical simulation, fluid-structure coupling, decoupling charge

CLC Number: 

  • TD 235
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