A family of constitutive models for mine cemented backfill is presented. Four formulas for the density- and pressure-dependency of elastic moduli, five formulas for the density- and pressure-dependency of friction angle and four formulas for the age-dependency of the elastic moduli and effective cohesion are incorporated into an isotropic hypoelasticity with Mohr-Coulomb perfect plasticity framework and implemented in PLAXIS as a user-defined material model. This family includes the standard Mohr-Coulomb, Bolton, Leps, Barton and Hoek- Brown models as trivial cases when both nonlinear elasticity and age-dependency are switched off. In this paper, the formulation of the models is introduced, the basis of the numerical implementation is outlined, and a case history of the application to the cemented backfill of a sublevel stoping mine is presented as an example.
@article{arxiv.2010.03129,
title = {A Family of Constitutive Models Implemented in PLAXIS to Simulate Cemented Mine Backfill},
author = {M. G. Sottile and N. A. Labanda and I. Garcia Mendive and O. Ledesma and A. O. Sfriso},
journal= {arXiv preprint arXiv:2010.03129},
year = {2020}
}