Scholarly record
NUMERICAL APPROACH TO THE ASSESSMENT OF EXCAVATION INDUCED ZONES AROUND THE UNDERGROUND WORKING
Abstract
The article deals with the problem of determination of zones induced by excavation of underground work in solid granitoid rocks using numerical modelling under the assumption of Hoek-Brown's failure condition and DiederichsпїЅs conceptual model of behaviour of the rock environment around the underground work. Three fundamental induced zones around the underground work are characterized - the High Damage Zone (HDZ), the Excavation Damage Zone (EDZ) and the Excavation Influence Zone (EIZ) and the possibilities of their indication based on DiederichsпїЅs methodical approach - Damage Initiation and Spalling Limits (DISL). This approach, based on the peak and residual parameters of Hoek-BrownпїЅs failure criteria for the characterization of the two basic limit boundary failure curves (the curve corresponding to the initiation of the cracks and the curve corresponding to the spalling type), will allow determination of the ranges of the individual zones on the basis of the evaluation of the principal stresses, shear strains and plastic indicators around the work. The methodology was applied to the evaluation of induced zones near the charging corridor of the reference project of a deep nuclear waste repository.
Publication Impact Profile
Publication details
References11
Kelsall, P.C., Case, J.B., Chabannes, C.R. Evaluation of excavation-induced changes in rock permeability. International Journal of Rock Mechanics and Mining Sciences and Geomechanics. Abstracts 1984,21(3).p.123-135.
Martin, C.D., Kaiser, P.K., McCreath, D.R. Hoek-Brown parameters for predicting the depth of brittle failure around tunnels. Canadian Geotechnical Journal, 1999,36(1). p.136-151.
Diederichs, M.S. Rock fracture and collapse under low confinement conditions. Rock Mechanics and Rock Engineering 2003,36(5).p.339-381.
Hou Z. Mechanical and hydraulic behaviour of rock salt in the excavation disturbed zone around underground facilities. International Journal of Rock Mechanics and Mining Sciences 2003,40(5).p.725-738.
Diederichs, M.S. The Canadian Geotechnical Colloquium: mechanistic interpretation and practical application of damage and spalling prediction criteria for deep tunnelling. Canadian Geotechnical Journal 2007,44(9). p.1082-1116.
Hudson, J.A.,et al. Characterising and modelling the excavation damaged zone in crystalline rock in the context of radioactive waste disposal. Environmental Geology 2009,57(6). P.1275-1297.
Rutqvist, J., et al. Modeling of damage, permeability changes and pressure responses during excavation of the TSX tunnel in granitic rock at URL, Canada. Environmental Geology 2009,57(6).p.1263-1274.
Perras, M.A., et al. A review of excavation damage zone in sedimentary rocks with emphasis on numerical modelling for EDZ definition. In: Proceedings of the 63rd Canadian Geotechnical Conference 2010. Calgary, Canada. p. 742-750.
Perras, M.A. Understanding and predicting excavation damage in sedimentary rocks:a continuum based approach. PhD Thesis. Kingston, Ontario, Canada: Queen’s University. 2014.
Perras, M.A., Diederichs, M.S. Predicting excavation damage zone depth in brittle rocks. Journal of Rock Mechanics and Geotechnical Engineering, 8(2016). p. 60-74.
Hoek, E. 1983. Strength of jointed rock masses. 23rd. Rankine Lecture. Géotechnique 33 (3).p. 187-223.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
