A preliminary, calibrated scheme for estimating rock mass properties
on Sep 2, 2013 in Downloads, Papers
D.A. Beck and C.R. Lilley Beck Engineering Pty Ltd. Sydney Australia F. Reusch, V. Levkovitch, G. Putzar and A. Flatten Beck Engineering. Berlin, Germany Calibration of 3D, discontinuum, strain softening, dilatant (SSD) models of mines often yields different rock mass scale (representative elementary volume, or REV) properties to empirical methods. In this paper, some steps towards a calibrated empirical scheme for estimating material properties for some types of 3d, discontinuum non-linear models targeting larger than (REV) scale phenomena are described. The scheme uses typical pre-mining...
Read MoreApplication of a non-linear confinement sensitive constitutive model to mine scale simulations subject to varying levels of confining stress (LR2 model)
on Jun 12, 2012 in Downloads, Papers
V. Levkovitch, F. Reusch, Beck Engineering, Germany D. Beck, Beck Engineering, Sydney, Australia The Mohr failure envelope for rock materials is a convex curve strongly dependent on the level of confinement and truncated at low normal stresses. The most commonly applied failure criterion – the Mohr-Coulomb criterion – matches the observed failure envelope poorly. Using this criterion it is not possible to accurately describe rock failure over the whole range of expected confinement conditions for many prob-lems and instead the engineer must choose parameters that will be applicable over...
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