A NEW APPROACH TO THE PREDICTION OF FAILURE BY ROCK NOISE

NOISE OR CREAK ORIGINATES AT POINTS OF DISLOCATION OR FRACTURE IN A SOLID BODY /BOTH COAL AND ROCK/ UNDER HEAVY PRESSURE NEAR THE POINT OF FAILURE. WITH THE AID OF INSTRUMENTS, THE NOISE CAN BE DETECTED IN ADVANCE OF ACTUAL FAILURE. LABORATORY EXPERIMENTS TO INVESTIGATE THE NATURE OF ROCK NOISE, NEW INSTRUMENTS FOR DETECTION, AND FIELD EXPERIMENTS IN DETECTION ARE REPORTED HERE. LABORATORY RESULTS INDICATE THAT ROCK NOISE AND THE CLOSE RELATION OBSERVED BETWEEN VOLUME OF NOISE AND HORIZONTAL TENSION STRAIN INCREASE WITH LOAD. THE TENDENCY IS MORE PRONOUNCED IN THE HIGH FREQUENCY COMPONENT OF THE NOISE. EXCEPTIONAL CASES ARE FOUND IN SOME SANDSTONE AND MARBLE SPECIMENS. IN WET ROCKS, THE FREQUENCY COMPONENT IS LOWER THAN IN DRY ROCKS. SOUND PROPAGATION WAS EXAMINED ALSO, ALONG WITH STATIONARY AND PORTABLE TYPES OF INSTRUMENTATION. APPLICATIONS IN METAL MINES IN JAPAN ARE DISCUSSED. /GA/

  • Corporate Authors:

    Columbia University Press

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    New York, NY  USA  10025
  • Authors:
    • Suzuki, T
    • SASAKI, K
    • Siohara, Z
    • HIROTA, T
  • Publication Date: 1964

Subject/Index Terms

Filing Info

  • Accession Number: 00234021
  • Record Type: Publication
  • Source Agency: Geophysical Abstracts
  • Report/Paper Numbers: pp 99-107
  • Files: TRIS
  • Created Date: Aug 30 1994 12:00AM