CHANGES IN IN SITU ULTRASONIC PROPERTIES OF ROCK ON STRAIN RELAXATION

In situ and laboratory measurements of ultrasonic velocity have been compared to test for the effect of strain relaxation on rock properties. For granites, the larger changes in compressional-wave velocity (vp) correlate with higher in situ stresses, the maximum vp being parallel to the directory of maximum compressive stress. For sedimentary rocks, the relation between changes in vp and in situ stress is dependent on lithology. In sandstone, the direction associated with the maximum decrease in vp accompanying strain relaxation is parallel to the maximum compressive stress. Limestone is virtually isotropic with little decrease in vp on strain relaxation. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01489062
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Engelder, T
  • Plumb, R
• Publication Date: 1984-4

Media Info

• Features: Figures; References;
• Pagination: p. 75-82
• Serial:
  • Intl J of Rock Mech & Mining Sci & Geomechanic Abs
  • Volume: 21
  • Issue Number: 2
  • Publisher: Pergamon Press, Incorporated
  • ISSN: 0148-9062

Subject/Index Terms

• TRT Terms: Compression; Evaluation and assessment; Field tests; Granite; Isotropy; Laboratories; Limestone; Lithologic composition; Measurement; Mechanical relaxation; Physical properties; Rocks; Sandstones; Strain (Mechanics); Stresses; Ultrasonics; Velocity; Wave motion; Waves
• Uncontrolled Terms: Wave velocity
• Old TRIS Terms: In situ stresses; Rock properties; Strains
• ITRD Terms: 5532: Compression; 9020: Evaluation (assessment); 4101: Granite; 6226: In situ; 6237: Laboratory (not an organization); 4131: Limestone; 6136: Measurement; 4154: Rock; 4104: Sandstone; 5408: Speed; 5575: Stress (in material); 6767: Wave
• Subject Areas: Geotechnology; Highways; I43: Rock Mechanics;

Filing Info

• Accession Number: 00386614
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 30 1984 12:00AM