Determination of in-situ stresses within rock masses using the acoustic emission technique
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Authors
Soltani Ghasemi, Amir Mohammad
Issue Date
1986
Type
Thesis
Language
en_US
Keywords
acoustic emission , in-situ stress measurement , Kaiser Effect , directional response , stress fields , rocks , Goodman Hard Rock Jack , granite , unconfined compression , Mackay Science Project
Alternative Title
Abstract
The use of acoustic emission as a technique for in-situ stress measurement was investigated. The process was based on two maxims: 1) the existence of the Kaiser Effect, and 2) the directional response of acoustic emissions to a stress field. During the study different rock types were loaded in the field with the aid of a Goodman Hard Rock Jack, as the resulting acoustic emissions were monitored. The results of this study indicate that the technique has the potential for determining the in-situ stress field. The Kaiser Effect was found to exist in small samples of granite under unconfined compression. Signs of this phenomenon were also observed in the field. A directional behavior suggesting different AE levels in response to a stress field was also observed in the field testings for the granite.
Description
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Citation
Publisher
University of Nevada, Reno
License
In Copyright(All Rights Reserved)