Effect of Confining Stress and Loading Rate on Fracture Toughness of Rocks

Details

• Personal Author:
  Dwyer, Jami G. ; Orr T ; Warneke, Joel
• Description:
  In this research, the effect of confining stress and loading rate on the fracture toughness has been investigated. The short beam compression test has been used to estimate the fracture toughness for Flagstaff sandstone. A brief theoretical analysis of the effects of confining stress and loading rate the fracture toughness is presented. This analysis considers changes to the critical fracture process zone size due to confining stress and loading rate. It is found that experimental results agree with the fracture mechanics theory. The mode II fracture toughness is found to increase with increasing confining stress and increasing loading rate. [Description provided by NIOSH]
• Subjects:
  Case Reports Hazardous Substances Mining Occupational Health Risk Assessment Safety Workplace
• Keywords:
  Ground-control Ground-stability Mining-industry Models Rock-mechanics Stress Underground-mining
• Series:
  Mining Publications
• ISBN:
  9780415444019
• Publisher:
  Taylor & Francis
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SRL - Spokane Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  1
• NIOSHTIC Number:
  nn:20035503
• Citation:
  Rock Mechanics: Meeting Society's Challenges and Demands, Volume 1: Fundamentals, New Technologies & New Ideas. Proceedings of the 1st Canada-US Rock Mechanics Symposium, May 27-31 2007 Vancouver, Canada. Eberhardt EB, Stead D, Morrison T, eds., London: Taylor & Francis, 2007 May; 1:625-629
• Editor(s):
  Eberhardt EB; Stead D; Morrison T
• Federal Fiscal Year:
  2007
• Peer Reviewed:
  False
• Source Full Name:
  Rock Mechanics: Meeting Society's Challenges and Demands. Proceedings of the 1st Canada-US Rock Mechanics Symposium, May 27-31 2007 Vancouver, Canada.
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:26cc92f028778ed68941c1318a18f1a313183092eaa9bc36b2aff5b46ba8fb6c33424dde34cf4c1d591e0a5df7f05285dd7c16ef6fa6fe48b618edf1716d47ac
• Download URL:
  https://stacks.cdc.gov/view/cdc/227098/cdc_227098_DS1.pdf
• File Type:
  [PDF - 464.79 KB ]