Post-Peak Pillar Behavior and the Effects of Backfill Confinement

Software:
FLAC 8.0
Example Write-Up:
Walk-Through: 
Runs in Demo: 
No
Level: 
INT
Consulting Service: 
Details and Description: 

FLAC is applied to study the behavior of progressively collapsing pillars.  The effect of backfill confinement is evaluated by comparing different scenarios: no backfill, tight backfill and backfill with a 10 cm gap between the backfill and the roof.  The peak/residual strength of the pillar is simulated using the strain-softening material model in FLAC, and the pore-collapse behavior of the backfill is simulated using the double-yield material model.

Keywords: 
  • Backfill
  • Pillar deformation
  • Sliding contact
  • Strain- Softening model
  • Double-Yiled model
  • Residual stress
Materials: 
  • Backfill
  • Rock
  • Talc
Analyses: 
  • Static