ULTRASONIC WAVE ATTENUATION IN DRY AND SATURATED ROCK UNDER BIAXIAL PRESSURE. PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN GEOMECHANICS, 11-15 APRIL 1988, INNSBRUCK, AUSTRIA. VOLUMES 1 - 3

This article describes the design and construction of an ultrasonic wave attenuation measurement system and a biaxial pressure loading system. The components of the experimental system include: (a) ccs-300 microcomputer; (b) bc-v instantaneous wave memory instrument; (c) syc-iii rock acoustic wave parameter instrument; (d) x-y function recorder; (e) loading equipment. This system was used to study the quality factor (q) values as well as velocities (v) of compressure (p) and shear (s) wave in dry and saturated Hongyang sandstone and diabase at ultrasonic frequencies. A pulse transmission technique and spectral ratios were used to determine q value relative to a reference sample with very low attenuation. It was found that q value is the function of differential pressure. The rate of the change of q values versus differential pressure varies depending on rock type, crack porosity and its distribution and saturation of rock. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/906191809X
• Corporate Authors:

  AA Balkema

  P.O. Box 1675
  Rotterdam,   Netherlands  BR-3000
• Authors:
  • Zhao, Yijun
  • Li, Zhaodin
• Publication Date: 1988

Media Info

• Features: References;
• Pagination: p. 1755-62
• Serial:
  • Publication of: Balkema (AA)
  • Publisher: AA Balkema

Subject/Index Terms

• TRT Terms: Basalt; Compression; Conferences; Damping (Physics); Loads; Porosity; Pressure; Rock mechanics; Sandstones; Seismicity; Shear strength; Ultrasonics; Waves
• ITRD Terms: 4183: Basalt; 5532: Compression; 8525: Conference; 5559: Damping; 5567: Load; 5938: Porosity; 5412: Pressure; 5757: Rock mechanics; 4104: Sandstone; 5731: Seismic; 5531: Shear; 6739: Ultrasonic; 6767: Wave
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00492702
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 90-6191-809-X
• Files: ITRD, TRIS
• Created Date: Mar 31 1990 12:00AM