Spallation damage of underground openings caused by excavation disturbance of adjacent tunnels

Zhao, R; Tao, M; Wu, C; Wang, S; Zhu, J

Spallation damage of underground openings caused by excavation disturbance of adjacent tunnels

Zhao, R Tao, M Wu, C

Wang, S Zhu, J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Tunnelling and Underground Space Technology, 2023, 132, pp. 104892
Issue Date:: 2023-02-01

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Field	Value	Language
dc.contributor.author	Zhao, R
dc.contributor.author	Tao, M
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Wang, S
dc.contributor.author	Zhu, J
dc.date.accessioned	2023-03-26T21:31:55Z
dc.date.available	2023-03-26T21:31:55Z
dc.date.issued	2023-02-01
dc.identifier.citation	Tunnelling and Underground Space Technology, 2023, 132, pp. 104892
dc.identifier.issn	0886-7798
dc.identifier.uri	http://hdl.handle.net/10453/168417
dc.description.abstract	Spallation damage in underground mines and tunnels is a common phenomenon, especially during blasting excavations, and revealing the mechanism of spallation damage is an urgent issue for the stability of underground tunnel. In this study, the circumferential and radial stress distributions around the circular tunnel under a transient cylindrical P-wave were examined by combining wave function expansion method and Duhamel's integral technique. Theoretical results revealed that the spallation damage around the tunnel was mainly caused by high radial dynamic stress concentrations face to a short-wavelength incident waves, and the circumferential and radial stresses around the tunnel decrease as the clearance increases. Furthermore, in order to reappear the spallation damage around the tunnel under blast load and obtain the effect of initial stress and bolt support, the CSCM material model was used to simulate the damage of surrounding rock by LS-DYNA. The numerical simulation results indicated that the initial stress reduced the radial cracks, while the presence of the initial stress exacerbated the spallation damage on the incident side. Finally, the stresses in each time stage of the circular tunnel surrounding rock under the action of transient cylindrical P-waves were analysed.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Tunnelling and Underground Space Technology
dc.relation.isbasedon	10.1016/j.tust.2022.104892
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Spallation damage of underground openings caused by excavation disturbance of adjacent tunnels
dc.type	Journal Article
utslib.citation.volume	132
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-26T21:31:53Z
pubs.publication-status	Published
pubs.volume	132

Abstract:

Spallation damage in underground mines and tunnels is a common phenomenon, especially during blasting excavations, and revealing the mechanism of spallation damage is an urgent issue for the stability of underground tunnel. In this study, the circumferential and radial stress distributions around the circular tunnel under a transient cylindrical P-wave were examined by combining wave function expansion method and Duhamel's integral technique. Theoretical results revealed that the spallation damage around the tunnel was mainly caused by high radial dynamic stress concentrations face to a short-wavelength incident waves, and the circumferential and radial stresses around the tunnel decrease as the clearance increases. Furthermore, in order to reappear the spallation damage around the tunnel under blast load and obtain the effect of initial stress and bolt support, the CSCM material model was used to simulate the damage of surrounding rock by LS-DYNA. The numerical simulation results indicated that the initial stress reduced the radial cracks, while the presence of the initial stress exacerbated the spallation damage on the incident side. Finally, the stresses in each time stage of the circular tunnel surrounding rock under the action of transient cylindrical P-waves were analysed.

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http://hdl.handle.net/10453/168417