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A family of constitutive models for mine cemented backfill is presented. Fourformulas for the density- and pressure-dependency of elastic moduli, fiveformulas for the density- and pressure-dependency of friction angle and fourformulas for the age-dependency of the elastic moduli and effective cohesionare incorporated into an isotropic hypoelasticity with Mohr-Coulomb perfectplasticity framework and implemented in PLAXIS as a user-defined materialmodel. This family includes the standard Mohr-Coulomb, Bolton, Leps, Barton andHoek- Brown models as trivial cases when both nonlinear elasticity andage-dependency are switched off. In this paper, the formulation of the modelsis introduced, the basis of the numerical implementation is outlined, and acase history of the application to the cemented backfill of a sublevel stopingmine is presented as an example.

A Family of Constitutive Models Implemented in PLAXIS to Simulate Cemented Mine Backfill