Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28311
Title: Numerical study on tunnel damage subject to blast-induced shock wave in jointed rock masses
Authors: Deng, XF
Zhu, JB
Chen, SG
Zhao, ZY
Zhou, YX
Zhao, J
Keywords: Bolts
Disturbed zones
Initial stress
Joints
Peak particle velocities
Scaled distance
Tunnel damage
Issue Date: 2014
Publisher: Pergamon Press
Source: Tunnelling and underground space technology, 2014, v. 43, p. 88-100 How to cite?
Journal: Tunnelling and underground space technology 
Abstract: In this study, numerical modeling on the damage of existing circular tunnel subject to blast-induced shock wave was carried out with DEM-based code UDEC. The disturbed zones including failure zones, open zones and shear zones around circular tunnel and peak particle velocities (PPVs) at tunnel surface are employed to analyze the damage of tunnel. The effects of joint spatial and mechanical properties, initial stress of rock mass, and magnitude of shock wave amplitude to damage of tunnel were evaluated in this study. The difference of damage between non-supported circular tunnel and bolt-supported circular tunnel subject to the same blast-induced shock wave was also studied. It is found that the orientations of joints in rock mass around the tunnel have great effects on tunnel damage. The initial stress around tunnel has relatively small influence on tunnel damage. The bolt support could greatly increase the stability of tunnel by changing the vibration form of particle velocity rather than the decreasing of PPV.
URI: http://hdl.handle.net/10397/28311
ISSN: 0886-7798
DOI: 10.1016/j.tust.2014.04.004
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