Identifying Unstable Failure in Brittle Rock Using the Finite Difference Method

Details

• Personal Author:
  Garvey R ; Ozbay MU
• Description:
  A series of uniaxial and triaxial compressive strength tests were simulated using the explicit finite difference software FLAC3D to simulate and identify unstable failure in rock. A slender cylindrical specimen was calibrated using the Mohr-Coulomb strain-hardening/-softening constitutive model to behave as a weak, brittle coal. Instability was induced within the specimen through a relatively soft compressive loading system with an applied elastic response. Unbalanced forces, accelerations, velocities, and shear strain rates were recorded during the FLAC3D simulations and were all found to have a strong positive correlation with other indications of unstable failure. The use of numerical identifiers of unstable failure was shown to provide a potential method for detecting instability within an explicit finite difference model at a higher resolution than existing methods. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety Software
• Keywords:
  Computer Software Failure Analysis Mining Industry Models Rock Mechanics Simulation Methods
• ISBN:
  9781622765140
• Publisher:
  American Rock Mechanics Association (ARMA)
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; Illinois ; OSHA Region 5 ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-6
• NIOSHTIC Number:
  nn:20056897
• Citation:
  46th US Rock Mechanics/Geomechanics Symposium, June 24-27, 2012, Chicago, Illinois. Alexandria, VA: American Rock Mechanics Association (ARMA), paper no. ARMA 12-422, 2012 Jun; :1-6
• Federal Fiscal Year:
  2012
• NORA Priority Area:
  Mining
• Performing Organization:
  Colorado School of Mines, Golden, Colorado
• Peer Reviewed:
  False
• Start Date:
  20090901
• Source Full Name:
  46th US Rock Mechanics/Geomechanics Symposium, June 24-27, 2012, Chicago, Illinois
• End Date:
  20130831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1c8e2fa43a48d4ca68fb8fec14f577abb2b3d6afe26b2bd14f9c803d02b24acb61b7b895b31dd6e7df7be4d8ca91769c38f2934f33ff4f05c0d27bf3603fbf3f
• Download URL:
  https://stacks.cdc.gov/view/cdc/214393/cdc_214393_DS1.pdf
• File Type:
  [PDF - 1.03 MB ]