Implementation and Application of a New Elastoplastic Model Based on a Multiaxial Criterion to Assess the Stress State near Underground Openings
Publication: International Journal of Geomechanics
Volume 10, Issue 1
Abstract
The inelastic (for Mises-Schleicher and Drucker-Prager unified) criterion has been developed over the last decade, and has been applied to simple problems for a wide range of geomaterials. This paper presents the approach taken to introduce this multiaxial criterion into a commercially available finite difference code using an elastoplastic framework. The paper begins with a brief review of the formulation. Then, the main components of the elastoplastic model and the implementation procedure are described. The ensuing model, called -EP (for elastoplasticity model), is then validated against some existing and recently developed analytical solutions for the stress state around a circular opening. The newly developed model is further applied to evaluate the stress state near underground openings, using the geometry of a tunnel and of vertical backfilled stopes. A brief discussion follows.
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Acknowledgments
The writers acknowledge the financial support from the Institut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail du Québec (IRSST) and from NSERC and partners of the Industrial NSERC Polytechnique-UQAT Chair in Environment and Mine Wastes Management (http://www.polymtl.ca/enviro-geremi/). The writers thank Dr. J. Molson for his review of the manuscript.
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Published In
International Journal of Geomechanics
Volume 10 • Issue 1 • February 2010
Pages: 13 - 21
Copyright
© 2010 ASCE.
History
Received: Dec 7, 2007
Accepted: Aug 28, 2009
Published online: Jan 15, 2010
Published in print: Feb 2010
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