Record details

Title
    Alternative methods for RQD parameter determination
Author
    Koníček, Petr
    Ptáček, Jiří
    Souček, Kamil
    Staš, Lubomír
    Vavro, Leona
    Vavro, Martin
    Waclawik, Petr
Conference
    5th International Colloquium on Geomechanics and Geophysics (24.06.2014-27.06.2014 : Ostravice, Karolínka, Česká republika)
Language
    anglicky
Publication type
    abstrakt
Source title - monograph
    5th International Colloquium on Geomechanics and Geophysics. GECO 2014. 5
Pages
    S. 53-54
Notes
    Autoři celkem: 7
    Projekt: ED2.1.00/03.0082, GA MŠk3cav_un_auth*0280791
    Rozsah: 2 s. : P
Subject category
    geotechnical monitoring
    rock fracturing
    rock mass classification
    rock quality designation (RQD
Keyword
    Alternative
    Determination
    Methods
    Parameter
    RQD
Abstract (in english)
   The Rock Quality Designation index (RQD) developed by Deere et al. [1] represents one of the basic parameters which enter into the calculation of rock mass quality by index rock mass classification systems RMR [2, 3] and Q [4]. The RQD is defined as the percentage of the sum of the lengths of intact core pieces longer than 100mm (4 inches) relative to the chosen length of evaluated drill core and originally, it was also defined for the purpose of rock mass quality classification. However, RQD is a single parameter value, which directionally depends on the borehole orientation towards the bedding or metamorphic foliation and reflects a rate of rock mass failure only stated on the basis of drill core fragmentation by discontinuities.
Contributor
    AV ČR Brno, Ústav geoniky
Contributor code
    AV ČR, ÚG
Source format
    U
Import date
    24. 10. 2014