Application of Acoustic Emission Technique for Estimation of Initial Stress

Autor:	Hisaya Yoshioka, Kozo Sugihara, Kazutoshi Michihiro, Koji Hata
Rok vydání:	1995
Předmět:	Materials science Scale (ratio) Field (physics) Mechanical Engineering Condensed Matter Physics Stress (mechanics) Acoustic emission Mechanics of Materials Principal stress General Materials Science Geotechnical engineering Stress conditions Underground cavern Rock mass classification
Zdroj:	Journal of the Society of Materials Science, Japan. 44:885-890
ISSN:	1880-7488 0514-5163
DOI:	10.2472/jsms.44.885
Popis:	A Large scale underground cavern, such as an underground power station, can be designed and executed rationally, if the initial stress condition of the site is known. Authors have carried out fundamental studies on the detection of initial stress using Acoustic Emission technique (Kaiser effect) by which the stress history of a rock mass can be estimated. In this paper, the characteristics of Kaiser effect on rock material have been investigated and the two or three dimentional principal stress condition has been estimated. It has been found that (1) the stress determined by the Kaiser effect is not always identical to the maximum stress of rock; (2) the Kaiser effect is a time-dependent phenomenon; (3) the initial stress estimated by AE method is not always equal to the initial stress estimated by the overcoring method in some field measurements.
Databáze:	OpenAIRE
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