Damage of Circular Tunnels under Millisecond Blasting-unloading in DEM

DOI

Description

Blasting excavation of deep tunnels is a typical dynamic process subjected to in-situ stress redistribution and blast loading. This study establishes a numerical model for millisecond blasting in the DEM method for two-dimensional circular tunnel excavation. The process of millisecond blasting in a circular tunnel is depicted as a sequence of delayed multiple blastings (multiple dynamic loading-unloadings and static adjustment processes) executed on distinct blasting surfaces that are concentric with the tunnel. After calibration and verification, the dynamic stress evolution process of surrounding rock and the resulting damage to surrounding rock are investigated.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390580173466975616
  • DOI
    10.11187/ijjsrm.240209
  • ISSN
    21898405
  • Text Lang
    en
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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