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 HoekBrown 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.
