Post-Peak Pillar Behavior and the Effects of Backfill Confinement

Software

Version Notes:
FLAC 8.0

Level: Intermediate
Runs in Demo: No

Write Up
Walk Through
Project Files
Consulting Services

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
Latest News
  • 2019 Sloan Outstanding Paper Award Dr. Mojtaba Bahaaddini (Shahid Bahonar University of Kerman), along with Associate Professor Glenn Sharrock (Itasca/UQ),...
    Read More
  • Itasca Awarded Prestigious Caving 2040 Research Grant Itasca’s research aims to answer the key industry question “how should block caves be designed...
    Read More
  • InSite V3.15 Now Available! Itasca Consulting Ltd (ICL) is pleased to announce the latest release of the InSite family...
    Read More

Upcoming Events
26 Jun
Discrete element modelling of dam foundations
Learn about modeling dam foundations using the discrete element method with UDEC and 3DEC software in the 26th ISRM Online Lecture.... Read More
1 Oct
FLAC3D 7.0 Introductory training course
... Read More
14 Oct
Focused Seismic and Liquefaction Training 2019
Itasca is offering a focused training session with instruction by experienced engineering consultants, hands-on modeling exercises, and... Read More