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Rock Mechanics and Rock Engineering

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01-03-2010 | Original Paper

Different Approaches for Simulating Brittle Failure in Two Hard Rock Mass Cases: A Parametric Study

Author: Catrin Edelbro

Published in: Rock Mechanics and Rock Engineering | Issue 2/2010

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Abstract

One of the aims of rock mechanics analysis is to predict fallouts in underground excavations. The objective of this paper was to study the relative importance of different strength parameters and their significance on the simulation of brittle failure and fallouts. This work was conducted as a parametric study, using numerical modelling and a number of approaches. The results were compared with observed fallouts. More obvious and distinct shear bands could be observed with decreased element sizes close to, and at, the boundary. The maximum shear strain was the most reliable indicator for fallout prediction. The results of the (instantaneous) cohesion softening friction softening models were sensitive to changes of the peak strength parameters and less sensitive to variations in residual parameters. The result from the cohesion-softening friction-hardening (CSFH) model, when using a peak cohesion equal to the intact rock strength, best captured the observed rock behaviour.

previous article New Observations on the Brittle Failure Process of Simulated Crystalline Rocks

next article Practical Estimates of Tensile Strength and Hoek–Brown Strength Parameter m i of Brittle Rocks

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Title: Different Approaches for Simulating Brittle Failure in Two Hard Rock Mass Cases: A Parametric Study
Author: Catrin Edelbro
Publication date: 01-03-2010
Publisher: Springer Vienna
Published in: Rock Mechanics and Rock Engineering / Issue 2/2010
Print ISSN: 0723-2632
Electronic ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-008-0025-x

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Other articles of this Issue 2/2010

Characteristic Curves for Deep Circular Tunnels in Poroplastic Rock

New Triaxial Apparatus for Rocks

Incorporating Parameter Variability in Rock Mechanics Analyses: Fuzzy Mathematics Applied to Underground Rock Spalling

Dilation and Spalling in Axially Compressed Beams Subjected to Bending

Response by the Author to: Comments on “Characteristic Curves for Deep Circular Tunnels in Poroplastic Rock” by G. Anagnostou and R. Schürch

Comments on “Characteristic Curves for Deep Circular Tunnels in Poroplastic Rock” by A. Bobet