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Blast‐induced rock fracture near a tunnel
Author(s) -
Xu Ling,
Schreyer Howard,
Sulsky Deborah
Publication year - 2015
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.2294
Subject(s) - cracking , geotechnical engineering , geology , fracture (geology) , blast wave , structural engineering , stress (linguistics) , plane stress , deformation (meteorology) , mechanics , engineering , forensic engineering , materials science , finite element method , physics , shock wave , composite material , linguistics , philosophy , oceanography
SUMMARY Damage in the form of cracks is predicted to assess the susceptibility of a tunnel to failure due to a blast. The material‐point method is used in conjunction with a decohesive failure model as the basis for the numerical simulations. The assumption of a cylindrical charge as the source for the blast allows the restriction of plane strain and two‐dimensional analyses. In the simulation, a further restriction of a single pressure pulse is used as the source of stress waves that are reflected and refracted after reaching the free surface of the tunnel wall. Three critical zones of significant cracking in the vicinity of a tunnel are identified as potential contributors to tunnel failure. Copyright © 2014 John Wiley & Sons, Ltd.