Ultrasonic pulse velocity as a rock stress sensor

Gladwin M.T. and Stagey F.D. (1974) Ultrasonic pulse velocity as a rock stress sensor. Tectonophysics, 21 1-2: 39-45. doi:10.1016/0040-1951(74)90060-2


Author Gladwin M.T.
Stagey F.D.
Title Ultrasonic pulse velocity as a rock stress sensor
Journal name Tectonophysics   Check publisher's open access policy
ISSN 0040-1951
Publication date 1974
Sub-type Article (original research)
DOI 10.1016/0040-1951(74)90060-2
Volume 21
Issue 1-2
Start page 39
End page 45
Total pages 7
Subject 1904 Performing Arts and Creative Writing
1908 Geophysics
Abstract A method of measuring with nanosecond precision the times of flight of ultrasonic pulses over distances of a few metres in rock in situ has been developed by using a multiple sampling technique, with pulses repeated at intervals of 20 msec and on-line averaging of many individual readings. In an ideal situation the measurements are sensitive to changes in rock stress smaller than 10-2 bar. The method has been used to seek changes in stress in the rock walls of an underground power station, in which thermal stresses were clearly seen, but without a secular trend, so that mechanical stability of the tunnel is implied.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 28 Jun 2016, 03:43:37 EST by System User