Boon, Chia Weng, Houlsby, G. T. and Utili, Stefano (2015) DEM modelling of a jointed rock beam with emphasis on interface properties. Géotechnique Letters, 5 (1). pp. 49-55. doi:10.1680/geolett.14.00105

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Abstract

This paper compares analyses performed via the distinct element method (DEM), employing rigid blocks and compliant joints, with results using finite-difference software (FLAC) obtained previously by other researchers. The paper then examines the capability of the rigid-block DEM at modelling joints realistically, with emphasis on the moment transfer between blocks. The line of thrust from this analysis was found to fit well with the well-established uniform catenary curve and the parabola, which has been used extensively in the rock engineering literature. This is an important verification exercise that is still lacking in the literature, especially for the rigid-block DEM. Finally, a comparison is made between the DEM and experimental work carried out previously by other researchers. The previously reported laboratory data were reinterpreted to derive more accurate contact laws in both normal and shear directions. A strain hardening or continuously yielding model was adopted in the latter. The calibration approach is demonstrated. The numerical findings suggest that improved predictions of beam deflections can be obtained and the predicted horizontal thrusts are comparable to the results obtained by FLAC.

Item Type:	Journal Article
Subjects:	T Technology > TN Mining engineering. Metallurgy
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Rock drilling -- Mathematical models, Tunnelling -- Discrete element method, Excavation -- Mathematical models, Rock drilling -- Discrete element method, Tunnelling -- Mathematical models, Excavation -- Discrete element method
Journal or Publication Title:	Géotechnique Letters
Publisher:	Thomas Telford (ICE Publishing)
ISSN:	2045-2543
Official Date:	January 2015
Dates:	Date Event January 2015 Published 1 September 2015 Available May 2015 Accepted
Date of first compliant deposit:	27 January 2016
Volume:	5
Number:	1
Page Range:	pp. 49-55
DOI:	10.1680/geolett.14.00105
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access

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