The failure mode of cemented backfill pillars is studied with FLAC. A sliding interface is used to represent the orebody-sandfill contact to allow downward settling of sand during collapse. The model is run in large-strain mode to illustrate the active collapse of the pillar.
Keywords:
- Backfill
- Pillar
- Mining stages
- Interface
- Large-strain
- Mohr-Coulomb model
Materials:
- Backfill
- Cement
- Ore
- Rock
Analyses:
- Static