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DOI: https://doi.org/10.11988/ckyyb.20250387

Numerical Simulation Method and Verification of Blasting Fragmenta-tion that Balances Computational Efficiency and Mechanical Ration-ality

  • HU Ying-guo , 1, 2 ,
  • WANG Jin-xu 1, 2 ,
  • LI Geng-quan , 1, 2 ,
  • CHAI Chao-zheng 1, 2 ,
  • XU Chen-yu 1, 2 ,
  • WU Xin-xia 1, 2
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  • 1. Changjiang Water Resources Commission, Yangtze River Scientific Research Institute，Wuhan 430010，China
  • 2. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources，Wuhan 430010，China

Received date: 2025-05-06

  Revised date: 2025-11-11

  Online published: 2025-12-04

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Abstract

The refined numerical simulation of blasting fragmentation is an important means to study the mechanism of blasting fragmentation. Firstly, the advantages and disadvantages of different types of numerical simulation methods in predicting blasting fragmentation and their engineering adaptability were compared. Through field experiments, the formation characteristics of blasting fragmentation were revealed, and the necessity of selecting numerical simulation methods for blasting fragmentation within different grading ranges was elucidated. Fur-thermore, a continuous discontinuous blasting fragmentation numerical simulation method based on LS/DYNA-DDA coupling is proposed. LS-DYNA based continuous medium numerical simulation is used in the near zone of the blast hole to improve the calculation efficiency of the crushing zone. DDA based discontinuous method is used for simulation in the middle and far zones to achieve discontinuous characterization of blasting fragmentation, and the accuracy of using stress and velocity components as coupling parameters is compared. Finally, based on the mining and blasting practice of Zhoushan Green Petrochemical Mine, the LS/DYNA-DDA coupling method was validated. The results showed that the small particle size block size was mainly concentrated in a small range near the blast hole. The use of continuous methods can efficiently simulate the distribution of small particle size block size and ensure accuracy; It is more reasonable to use DDA method to simulate the fragmentation of large particle size blocks, and using peak velocity as the coupling component between different methods can reduce the pressure loss during calculation transmission; Based on the measured results, the existing numerical simulation methods were compared with LS/DYNA-DDA coupling, and the proposed new method improved the accuracy of predicting blasting fragmentation. It has advantages in balancing the rationality of blasting fragmen-tation mechanics mechanism and computational efficiency.

Key words： blasting; continuous-discontinuous; fragmentation; coupling; numerical simulation

Cite this article

HU Ying-guo , WANG Jin-xu , LI Geng-quan , CHAI Chao-zheng , XU Chen-yu , WU Xin-xia . Numerical Simulation Method and Verification of Blasting Fragmenta-tion that Balances Computational Efficiency and Mechanical Ration-ality[J]. Journal of Changjiang River Scientific Research Institute, 0 . DOI: 10.11988/ckyyb.20250387

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