Rock Slide

Software

Version Notes:
PFC, PFC3D 5.0

Level: Intermediate
Runs in Demo: Yes

Write Up
Walk Through
Project Files
Consulting Services

This example demonstrates the use of PFC to model a pile of rock boulders sliding down a slope. The slope is represented by a DXF surface that is imported into PFC and automatically converted to wall facets. The boulders consist of clumps of overlapping pebbles generated from a set of STL surface geometry files. During the model run, the boulders are plotted using a smooth surface representation of the clumps (rather than the actual pebbles).

Using a set of data files called (executed) sequentially via a central "doall" data file, this example demonstrates:

(1) How to make and save binary clump templates for future simulations (make_clump_templates.p3dat):

  • import the STL files of the boulders
  • use BubblePack to generate the pebble distribution and calculate the inertia tensor and volume from the surface description
  • calculate the inertia tensor from the pebble distribution
  • export each one to a binary file to be loaded later

(2) How to generate clumps in a periodic container and let them settle within a periodic space (put_in_periodic):

  • import the clump templates from the binary files
  • generate a distribution of clumps derived from a series of bin sizes based on volume fraction
  • assign clump properties and linear contact model for initial packing
  • calm clumps for initial packing
  • make brick and export as file
  • save model results at this stage

(3) How to generate the mountain slope topology, assign clump and slope properties, and create particle velocity traces (make_mountain):

  • import the mountain as a wall
  • import the brick and assemble it
  • remove any clumps outside of the mountain surface
  • add a bounding box and permit clumps to settle into their initial position
  • assign clump properties and linear contact model for the final simulation
  • settle in the box
  • change the frictional properties along the slope
  • add a number of particle traces
  • save model results at this stage

(4) How to run a simple simulation in PFC (run_model):

  • adjust the plot view
  • cycle the model 100,000 times
  • save final model results at this stage

Keywords:

  • rock fall
  • fly rock
  • avalanche

Materials:

  • Rock

Analyses:

  • Dynamic
Latest News
  • 2020 Peter A. Cundall Award ...
    Read More
  • Itasca Symposium 2020 Technical Papers and Statistics ...
    Read More
  • Itasca Symposium 2020 - Registration Now Open! Registration is now open for the Fifth International Itasca Symposium....
    Read More

Upcoming Events
17 Feb
Itasca Symposium 2020
The Fifth International Itasca Symposium will be held at the University of Vienna (Austria). The Symposium will features the applicatio... Read More
9 Mar
FLAC Introductory Training - Minneapolis
FLAC is numerical modeling software for advanced geotechnical analysis of soil, rock, groundwater, and ground support in two dimensions... Read More
16 Mar
FLAC3D Introductory Training - Minneapolis
Three days of general feature training addressing basic concepts and recommended procedures for geotechnical numerical analysis.... Read More