Blasting, Volume. 42, Issue 2, 88(2025)

Numerical Simulation and Application of Energy Dissipation Blasting for Relatively Intact Hard Rock

CHEN Yu-quan1, LI Da-zhong1, LI Ming-ze2, and CHEN Ming2、*
Author Affiliations
  • 1China International Water & Electric Corp, Beijing 100120, China
  • 2State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan 430072, China
  • show less

    A novel energy dissipation blasting technique based on water coupling is proposed to explore new methods for rapid excavation of spillway protection layers in hydropower stations under relatively intact hard rock conditions. This method specifically addresses the excavation requirements of the Nam Kong 1 Hydropower Station spillway in Laos. By increasing borehole pressure, the technique generates stronger stress, which is advantageous for excavating hard rock formations. Simulation analysis using LS-DYNA software demonstrates that coupling water-charged explosives with a blocked borehole bottom amplifies the peak load on the borehole walls and extends the explosive load duration, thereby improving the fragmentation of harder rock at the borehole bottom. Results indicate that the combination of bottom-hole blockage and water-coupled charges increases lateral damage depth and prolongs load application time, thus achieving more effective excavation and formation in relatively intact hard rock. Comprehensive evaluations based on numerical simulations and field test parameters confirm that this approach significantly improves the quality of excavation and formation of the first-stage stilling basin floor in practical engineering applications.

    Tools

    Get Citation

    Copy Citation Text

    CHEN Yu-quan, LI Da-zhong, LI Ming-ze, CHEN Ming. Numerical Simulation and Application of Energy Dissipation Blasting for Relatively Intact Hard Rock[J]. Blasting, 2025, 42(2): 88

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Jun. 28, 2024

    Accepted: Jun. 24, 2025

    Published Online: Jun. 24, 2025

    The Author Email: CHEN Ming (whuchm@whu.edu.cn)

    DOI:10.3963/j.issn.1001-487x.2025.02.011

    Topics