Stress determination in rock using the Kaiser effect
Read Online
Share

Stress determination in rock using the Kaiser effect by Michael Friedel

  • 267 Want to read
  • ·
  • 85 Currently reading

Published by Bureau of Mines, U.S. Dept. of the Interior in Washington, D.C .
Written in English

Subjects:

  • Rocks -- Testing.,
  • Rock mechanics.,
  • Acoustic emission testing.

Book details:

Edition Notes

Bibliography: p. 19-20.

Other titlesKaiser effect.
Statementby Michael J. Friedel and Richard E. Thill.
SeriesReport of investigations ;, 9286, Report of investigations (United States. Bureau of Mines) ;, 9286.
ContributionsThill, Richard E.
Classifications
LC ClassificationsTN23 .U43 no. 9286, TA706.5 .U43 no. 9286
The Physical Object
Pagination20 p. :
Number of Pages20
ID Numbers
Open LibraryOL2196242M
LC Control Number89015871

Download Stress determination in rock using the Kaiser effect

PDF EPUB FB2 MOBI RTF

The Kaiser effect takes place in rocks and materials subjected to cyclic loading/unloading. In the simplest case of cyclic, uniaxial loading with the cycle's peak stress increasing from cycle to cycle, the acoustic emission (AE) is zero or close to the background level so long as the stress remains below the largest previously reached stress value, σ by: The method of Kaiser effect in situ stress measurement mainly includes the following steps: field drilling sampling, rock specimen processing, uniaxial compression and AE experiments, Kaiser Author: Alexandre Lavrov. A simple and accurate interpretation method of in situ stress measurement by using the Kaiser effect of rock is proposed. In this experiment, a fractal theory was used to interpret the acoustic emission test results, and the relevant fractal dimension of rock acoustic emission is by: 1. [61][62] [63] The Kaiser effect was then later used to monitor the evolution of microcrack damage in rock in the laboratory. 42,54,55,[64][65][66][67] We must highlight that there is some evidence.

The first attempt was made to determine in situ stresses in rocks using the AE method by Kanagawa et suggested that Kaiser effect (KE) levels obtained from the “cumulative AE countstress” response could be used to obtain in situ stress ().In this approach, it is assumed that the KE level determined from an oriented specimen under uniaxial loading is equal to the normal stress Cited by: The Kaiser effect is a phenomenon observed in geology and material science that describes a pattern of acoustic emission (AE) or seismicity in a body of rock or other material subjected to repeated cycles of mechanical material that exhibits an initial seismic response under a certain load, the Kaiser effect describes the absence of acoustic emission or seismic events until that load. The Kaiser effect ae technology holds promise for providing a comparatively inexpensive and less complex method for examining stress history in rock. However, since the confining stress has a pronounced influence on the Kaiser effect, it must be considered in developing technology for determining peak field stresses based on the Kaiser effect."Cited by: 6.   Irreversible deformation of rocks is accompanied by the Kaiser effect involving acoustic emission (AE). AE activity increases dramatically as soon as the largest previously experienced stress level is exceeded, similar to strain hardening in ductile materials. The Kaiser effect can be considered as a basis for stress measurements in rocks. This phenomenon is characterized by complexity which.

The Stress Effect is an essential resource for Leaders. We recommend The Stress Effect for Coaches, Consultants and HR / Practitioners who need to hire, develop and retain High Performing Leaders.. High Performing Systems can help you manage stress, use your Emotional Intelligence, make better decisions and become Stress to talk with an experienced member of our team. Kaiser effect is the simplest and inexpensive. A rock core from an underground site is used in determining the past stress history. The Kaiser effect can be defined as the stress level at which acoustic emission . Abstract The primary objectives of this work are to (1) improve the understanding of the prevailing stress distribution at the Äspö Hard Rock Laboratory (HRL) in SE Sweden by employing an integrated stress determination approach, and in order to accomplish this (2) extend the existing stress integration methodology denominated integrated stress determination method (ISDM; Cornet in. Evaluation of rock stress estimation by the Kaiser effect p. Kaiser effect in tri-axial tests of limestone samples p. Correlation of in-situ stresses to geological structures in two underground mines p. Estimation in-situ stress magnitudes from core disking p. Determination of in-situ stress from oriented core p. An.