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Volume 38 Issue 2
Apr 2024
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Chinese Journal of High Pressure Physics  > 2024  >  38(2): 025302.
LI Xianglong, YAN Shiqian, WANG Jianguo, YAO Yongxin, HUANG Yuanming. Precise Time-Delay Blasting Parameters of Stratified Single Blasting Well Completion[J]. Chinese Journal of High Pressure Physics, 2024, 38(2): 025302. doi: 10.11858/gywlxb.20230748
Citation: LI Xianglong, YAN Shiqian, WANG Jianguo, YAO Yongxin, HUANG Yuanming. Precise Time-Delay Blasting Parameters of Stratified Single Blasting Well Completion[J]. Chinese Journal of High Pressure Physics, 2024, 38(2): 025302. doi: 10.11858/gywlxb.20230748
shu

Precise Time-Delay Blasting Parameters of Stratified Single Blasting Well Completion

doi: 10.11858/gywlxb.20230748
  • 1.

    Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

  • 2.

    Advanced Blasting Technology Engineering Research Center of Yunnan Province Education Department, Kunming 650093, Yunnan, China

  • 3.

    Yuxi Mining Co. Ltd., Yuxi 653100, Yunnan, China

  • Received Date: 08 Oct 2023
  • Rev Recd Date: 08 Nov 2023
    • Available Online: 01 Apr 2024
  • Issue Publish Date: 05 Apr 2024
    Abstract
  • To investigate effects of precise millisecond time delay detonation on the layered blasting in a single well completion, the millisecond time between holes within the layer was determined by theoretical calculation, and the JH-2 rock model was used in LS-DYNA software to simulate the precise delayed layered detonation in a single well completion blasting of large-diameter deep holes. Blasting effects of two types of delay time were compared, and the process of rock damage evolution in the wellbore was analyzed, finally field tests were conducted to verify the delay time parameters. The numerical calculation results revealed that through considering a comprehensive analysis of the dynamic rock damage process, the characteristic cross-sectional area of the blasting chamber, and the extent of rock damage, a delay time of 18 ms between layers of blasting proved to be more effective. The optimal delay time was determined by theoretical analysis and numerical simulations. Both field tests and numerical simulations demonstrated that the wellbore formation closely matched in the selected cross-sectional area characteristics, with a similarity ranging from 83.4% to 96.6% and an average similarity of 92.4%. This study highlights that the precise millisecond time delay layered blasting method, obtained through the combination of theoretical analysis, numerical simulation, and field tests (referred to as the “trinity analysis method”), providing reliable and accurate results. It holds practical value and is of significant importance for guiding real-world applications in single blasting well completion projects.

     

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