3-D modelling of underground mine structures with backfill

CIM Bulletin, Vol. 85, No. 962, 1992

L. Zhang and H.S. Mitri, Department of Mining and Metallurgical Engineering, McGill University, Montreal, Quebec

A 3-dimensional finite element model for stress/stability analysis of rock excavations in underground mines is presented. Developed for use on personal computer under OS/2 operating system, the model employs the 8-node isoparametric brick element and accounts for such loading conditions as in situ stresses and gravity loading of the rock mass. In addition, modelling of backfill in mine slopes as in situ stress-free material is incorporated. Material failure is assessed by Mohr-Coulomb or Hoek-Brown failure criterion. A mine design example is presented to illustrate the potential use of the model as a tool for slope design.