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Stochastic Model Generation for Discontinuous Rock Mass Media and Numerical Analysis using the NSCD Method (Case Study: Saint-Bé at Gallery in the Southwest of France)

Abstract : The processes of the stochastic generation of a discontinuous rock mass model are presented in this paper, using the orientation data measured directly in the abandoned underground gallery of Saint-Béat castle, in the southwest of France. This gallery is particularly interesting because, even without reinforcement, all the walls and the roof are perfectly stable. The fracture measurements are carried out in order to investigate the stability and design of a 1 km long tunnel, which will be part of the new ring road of the city of Saint-Béat. The statistical parameters extracted from the fracture measurements are then used in the code developed using the AutoCAD software in order to generate seven 3D stochastic models of jointed rock mass media. The stability analysis of the models is carried out using the LMGC90 code, based on the Non-Smooth Contact Dynamics (NSCD) method. In this paper, this method is used to simulate rock mass media, as large collections of rigid blocks under unilateral constraints and frictional Coulomb's law.
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https://hal.mines-ales.fr/hal-03260742
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Submitted on : Tuesday, June 15, 2021 - 10:43:23 AM
Last modification on : Tuesday, July 13, 2021 - 3:09:31 AM

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  • HAL Id : hal-03260742, version 1

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A. Rafiee, M. Gasc-Barbier, Marc Vinches. Stochastic Model Generation for Discontinuous Rock Mass Media and Numerical Analysis using the NSCD Method (Case Study: Saint-Bé at Gallery in the Southwest of France). ISRM 2011 - 12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, Oct 2011, Beijing, China. ⟨hal-03260742⟩

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