Record details

Title
    Active ultrasound in geological research in Kladno
Statement of responsibility
    Karel Malinský, Jaroslav Plocek
Author
    Malinský, Karel
    Plocek, Jaroslav
Language
    anglicky
Source title - serial
    Acta montana. Series A, Geodynamics
Vol./nr.
    No. 7(96)
Pages
    p. 75-81
Year
    1995
Notes
    1 obr., 15 bibl.
    Zkr. název ser.: Acta montana
Subject group
    důl
    kladensko-rakovnická pánev
    mechanika hornin
    metoda ultrazvuková
    uhelná sloj
    uhlí bituminózní
Geographical name
    ČR-Čechy
    Vinařice (Kladno)
Keyword
    Active
    Geological
    Kladno
    Research
    Ultrasound
Abstract (in english)
   The use of active ultrasound (cross-hole ultrasonic sounding) as part of complex geotechnic research in the Kladno-2 mayrau mine is described in this paper. Having passed through the rockmass, the ultrasonic waves bear information about the rockmass. Attenuation and the velocity of sound (passing time) are measured. Dispersion is assumed as negligible. The presence of water in the rockmass is substantional: water is used as an immersion. The degree of saturation of the rockmass by water must be checked. - The multiple scattering in the coarse-grained sandstone occurs but remains constant and does not affect the results of the measurement (unless microcracks etc. occur). The interferometric method of evaluating the changes of time (velocity) of ultrasound enables the eachievement of a satisfactory precision in the results
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    25. 3. 2008
Import date
    8. 8. 2012