Welcome to CDC Stacks | Rock Mass Characterization For Excavations In Mining And Civil Engineering; Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining - 8475 | National Institute for Occupational Safety and Health
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
Rock Mass Characterization For Excavations In Mining And Civil Engineering; Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining
  • Published Date:
    5/1/2007
Filetype[PDF - 2.02 MB]


Details:
  • Personal Authors:
  • 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.

  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like: