Rock Mass Characterization For Excavations In Mining And Civil Engineering; Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining

Details

• Personal Author:
  Barton, Nick, PH.D.
• Description:
  When the Q-system was launched in 1974, the name referred to rock mass classification, with focus on tunnel and cavern support selection. Besides empirical design of support, the Q-value, or its normalized value Qc, has been found to correlate with seismic P-wave velocity, with deformation modulus, and with deformation. The Q-system provides temporary or permanent support for road, rail, and mine roadway tunnels and for caverns for various uses. It also gives relative cost and time for tunnel construction for a complete range of rock qualities. There are also indications that Q has captured important elements of the cohesive and frictional strength of rock masses, with Qc resembling the product of rock mass cohesion and rock mass friction coefficient.
• Subjects:
  NIOSH
• Document Type:
  Text
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• NIOSHTIC Number:
  nn:20032023
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:6a0f7e7859df1a9494187e7a115a466b809ad2e28d76a56627d357117f4d985c4050682817519cd9feabcf31433d738388cecc14e56fc401afae6ca7bff53fad
• Download URL:
  https://stacks.cdc.gov/view/cdc/8475/cdc_8475_DS1.pdf
• File Type:
  [PDF - 2.02 MB ]