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Numerical Studies on the Cumulative Damage Effects and Safety Criterion of a Large Cross-section Tunnel Induced by Single and Multiple Full-Scale Blasting

Rock mechanics and rock engineering, 2021-12, Vol.54 (12), p.6393-6411 [Peer Reviewed Journal]

The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2021 ;The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2021. ;ISSN: 0723-2632 ;EISSN: 1434-453X ;DOI: 10.1007/s00603-021-02630-9

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  • Title:
    Numerical Studies on the Cumulative Damage Effects and Safety Criterion of a Large Cross-section Tunnel Induced by Single and Multiple Full-Scale Blasting
  • Author: Ji, Ling ; Zhou, Chuanbo ; Lu, Shiwei ; Jiang, Nan ; Gutierrez, Marte
  • Subjects: Blasting ; Civil Engineering ; Criteria ; Cross sections ; Cumulative damage ; Damage ; Damage assessment ; Depth ; Dredging ; Earth and Environmental Science ; Earth Sciences ; Engineering ; Excavation ; Field study ; Field tests ; Geophysics/Geodesy ; Mathematical models ; Numerical analysis ; Numerical prediction ; Orbital velocity ; Original Paper ; Rocks ; Safety ; Simulation ; Tunnels ; Velocity ; Yield point
  • Is Part Of: Rock mechanics and rock engineering, 2021-12, Vol.54 (12), p.6393-6411
  • Description: The cumulative damage effects of surrounding rock under single full-face blasting and multiple full-face blasting of a large cross-section tunnel are comparatively studied in this paper. The damage processes of the single and multiple full-face blasting of the tunnel are simulated by the established rock damage model embedded into the LS-DYNA computer code through its user subroutines and a cumulative damage simulation technology in the LS-DYNA. The simulation results are verified against field test data. The results demonstrate that the numerically predicted peak particle velocity (PPV) of the surrounding rock under multiple full-face blasting is more consistent with field test data than that under single full-face blasting, which indicates the advantages of multiple full-face blasting in comparison to single full-face blasting in simulating the blasting process of a tunnel. The maximum damage depth in the middle of the tunnel invert is mostly affected by multiple full-face blasting. Both the maximum damage depth and the maximum PPV occur in the middle of the tunnel invert under single and multiple full-face blasting. Based on the defined damage threshold D cr and the modeled maximum damage depth of the surrounding rock, the influence of initiation sequence on the critical PPV for rock damage is analyzed, and a critical PPV of rock damage is proposed to provide a safety criterion for tunnel blasting excavation.
  • Publisher: Vienna: Springer Vienna
  • Language: English
  • Identifier: ISSN: 0723-2632
    EISSN: 1434-453X
    DOI: 10.1007/s00603-021-02630-9
  • Source: ProQuest Central
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