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:
    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.

  • Collection(s):
    National Institute for Occupational Safety and Health
  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like:
  1. Problems With Rock Classification For Empirical And Numerical Design; Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining
    Personal Author:
    Milne, Douglas, PH.D.
    Published:
    5/1/2007
    Description:
    Most empirical and numerical approaches to design in rock mechanics incorporate rock mass classification. Numerical design methods generally use classification values to calculate input parameters for stress-based failure criteria. Empirical methods ...
    File Type:
    Filetype[PDF - 378.31 KB]
  2. The Geological Strength Index (GSI): A Characterization Tool For Assessing Engineering Properties For Rock Masses; Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining
    Personal Author:
    Marinos, Paul G., PH.D.; Marinos, Vassilis; Hoek, Evert, PH.D.;
    Published:
    5/1/2007
    Description:
    The Geological Strength Index (GSI) is a system of rock mass characterization that has been developed in engineering rock mechanics to meet the need for reliable input data related to rock mass properties required as input for numerical analysis or c...
    File Type:
    Filetype[PDF - 887.63 KB]
  3. Classification-Based Probabilistic Design Of Ground Support; Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining
    Personal Author:
    Langston, Radford B.; Kirsten, Hendrik A. D., Dr.; Howell, Graham C., Dr.; Marjerison, John A.;
    Published:
    5/1/2007
    Description:
    Probabilistic design is gaining wider acceptance in the rock engineering community since it allows more rigorous determination of risk relating to ground fall or excavation instability. Risk analysis can be conducted by various means, but the basis i...
    File Type:
    Filetype[PDF - 338.12 KB]
  4. Rock Mass Characterization Of Primary Copper Ore For Caving At The El Teniente Mine, Chile; Proceedings Of The International Workshop On Rock Mass Classification In Underground Mining
    Personal Author:
    Brzovic, Andres; Villaescusa, Ernesto, PH.D.;
    Published:
    5/1/2007
    Description:
    Rock masses of the primary copper ore at the El Teniente Mine are very competent and massive. The rock mass contains almost no open discontinuities. Nevertheless, there is a high frequency network of small discontinuities coupled with widely spaced f...
    File Type:
    Filetype[PDF - 974.65 KB]
  5. Proceedings of the International Workshop on Numerical Modeling for Underground Mine Excavation Design
    Personal Author:
    Esterhuizen, Gabriel S.; Klemetti, Ted M.; Mark, Christopher; Tuchman, Robert J.;
    Corporate Author:
    National Institute for Occupational Safety and Health; Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health);
    Conference Author:
    International Workshop on Numerical Modeling for Underground Mine Excavation Design (2009 : Asheville, NC); U.S. Symposium on Rock Mechanics 2009 : Asheville, NC);
    Published:
    June 2009
    Series:
    DHHS publication ; no. (NIOSH) 2009-141
    Information circular (National Institute for Occupational Safety and Health) ; IC 9512
    Description:
    "Numerical models play a significant role in the design of safe underground mining excavations and support systems. Advances in the capabilities of numerical modeling software, together with ever increasing computational speeds, have made it possible...
    File Type:
    Filetype[PDF - 81.14 MB]