ACOUSTIC AND MECHANICAL PROPERTIES OF JOINTED ROCK

The relationships were studied between wave velocities, fracture frequency, aperture, moisture content, contact pressure at joints and so on, underground at 104 tunneling sites, on several sites at the ground surface, and in laboratory tests. By considering 'fracture frequency' as the main parameter, the practical relationship between seismic behavior and mechanical properties of rock mass has been established. In general the velocity ratio k, defined by the ratio of p-wave veolocity in-situ or through a cracked model to that of intact rock, and fracture frequency n, defined by the number of joints per meter, can be expressed by an equation n = 5.0/squares-4.0. Also an aperture wider than 1 mm and a decrease of contact pressure to less than 3 mpa markedly influence the seismic behavior of the rock mass. The number of the covering abstract of the congress is TRIS no. 385148. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9061912377
• Supplemental Notes:
  • This paper was presented at the Fifth International Congress on Rock Mechanics, Melbourne, Australia, 1983, Volume 1, Theme A.
• Corporate Authors:

  AA Balkema

  P.O. Box 1675
  Rotterdam,   Netherlands  BR-3000

  Australasian Institute of Mining and Metallurgy

  204 Lygon Street
  Carlton, Victoria  Australia  3053
• Authors:
  • Tanimoto, C
  • Ikeda, K
• Publication Date: 1983

Media Info

• Features: Figures; References;
• Pagination: p. 15-18
• Serial:
  • Publication of: Balkema (AA)
  • Publisher: AA Balkema

Subject/Index Terms

• TRT Terms: Acoustic properties; Conferences; Cracking; Failure; Fracture mechanics; Laboratories; Mechanical properties; Moisture content; Pressure; Properties of materials; Rock jointing; Rocks; Seismicity; Sound; Speed; Tests; Tunnels; Wave motion; Waves
• Uncontrolled Terms: Fracture; Wave velocity
• Old TRIS Terms: Seismic properties
• ITRD Terms: 8525: Conference; 5211: Cracking; 5520: Failure; 4089: Joint (geomorphol); 6237: Laboratory (not an organization); 5920: Moisture content; 5412: Pressure; 5925: Properties; 4154: Rock; 5731: Seismic; 6748: Sound; 5408: Speed; 6255: Test; 3374: Tunnel; 6767: Wave
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials; I43: Rock Mechanics;

Filing Info

• Accession Number: 00385150
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 90 6191 237 7
• Report/Paper Numbers: BOOK
• Files: ITRD, TRIS, ATRI
• Created Date: May 30 1984 12:00AM