A SONIC UNIT FOR THE DETERMINATION OF IN SITU DYNAMIC PROPERTIES AND FOR THE OUTLINING OF FRACTURE ZONES

A SONIC SYSTEM IS DESCRIBED WHICH HAS BEEN DEVELOPED FOR PROBING THE ROCK AROUND MINING OPENINGS. WITH THIS SYSTEM, TRANSIT TIME MEASUREMENTS OF A FEW HUNDRED MICROSECONDS TO MANY MILLISECONDS CAN BE MADE WITH AN ACCURACY OF 5%. THE SONIC APPARATUS IS RELATIVELY PORTABLE AND ENTIRELY INDEPENDENT OF EXTERNAL POWER REQUIREMENTS, ALLOWING ITS USE IN REMOTE MINING LOCATIONS. A HAMMER BLOW IS USED AS A SOURCE OF SIGNAL. FOR TRANSIT TIME MEASUREMENTS BETWEEN BOREHOLES, HYDRAULICALLY WEDGED TRANSMITTING AND RECEIVING UNITS HAVE BEEN DEVELOPED. SURFACE RECEIVING UNITS HAVE ALSO BEEN DEVELOPED AND USED. THE BASIC ASSUMPTION ON WHICH SONIC TRANSIT VELOCITY IS RELATED TO FRACTURE ZONE IS STATED AND SOME OF THE POSSIBLE APPLICATIONS OF SUCH MEASUREMENTS ARE OUTLINED. FIELD MEASUREMENTS TO SUBSTANTIATE SOME OF THE STATEMENTS MADE ARE ALSO INCLUDED. /AUTHOR/

  • Supplemental Notes:
    • Proceedings, P 358-380, 30 FIG, 2 REFS
  • Corporate Authors:

    Rock Mechanics Symposium

    ,    
  • Authors:
    • Laroque, G E
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00228918
  • Record Type: Publication
  • Source Agency: Geoscience Abstracts
  • Files: TRIS
  • Created Date: Aug 15 2004 2:10AM