3 edition of Stress determination in rock using the Kaiser effect found in the catalog.
Stress determination in rock using the Kaiser effect
|Other titles||Kaiser effect.|
|Statement||by Michael J. Friedel and Richard E. Thill.|
|Series||Report of investigation (United States. Bureau of Mines) -- no.9286.|
|Contributions||Thill, Richard E.|
|LC Classifications||USBMRI#9286 1989|
|The Physical Object|
|Number of Pages||20|
|LC Control Number||89-15871|
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CT scan of the heart (Cardiac CT, including coronary calcium scan) Myocardial perfusion scan (using thallium, sestamibi, technetium) Coronary arteriogram/angiogram (heart catheterization) Cardiac Magnetic Resonance Imaging (CMR) Stress Stress/treadmill test. Keywords: stress intensity factor, finite element method, rock mechanics 1. INTRODUCTION A great deal of experimental researches in the field of rock mechanics are strongly connected to fracture and failure of different type of rocks and concentrate on determination of material properties, amongst which stress intensity factor (K) is the.
The stress raising effects of a circular groove in a tensile bar are shown in Fig. , where a stress concentration, K, of might be expected, then since the stress in the area of the groove is twice the nominal stress in a region removed from the groove, the specimen would fail at one-half the load required for an unnotched specimen. Such File Size: 40KB. This workbook includes surveys and quizzes, a stress journal, a stress action plan, and weekly activities to help your employees manage their stress. Skip to page main content Skip to page footer. CORONAVIRUS/COVID Learn how to protect yourself and get care Kaiser Foundation Health Plan, Inc., in Northern and Southern California and.
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Additional Physical Format: Online version: Friedel, Michael J. Stress determination in rock using the Kaiser effect. Washington, D.C.: Bureau of Mines, U.S. Dept. 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. 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.
  The Kaiser effect was then later used to monitor the evolution of microcrack damage in rock in the laboratory.
42,54,55, 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.
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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.
"The Bureau of Mines has developed a practical methodology for determining occluded gas contents of domal rock salt samples. Stress determination in rock using the Kaiser effect. Personal Author: "The Bureau of Mines investigated acoustic emission (ae) and the Kaiser effect in six types of rock: St.
Cloud gray granodiorite, Barre Cited by: 1. being useful for estimating the rock in-situ stress. Keywords: Electromagnetic emission, Acoustic emission, Rock, Kaiser Effect, Stress history 1. Introduction The stress state of rock in the Earth’s crust is an important consideration in the oil, mining and tunneling industries.
To estimate the stress state, a File Size: 6MB. Effect of scale on stress Effect of scale on stress measurements Effect of scale on rock properties involved in the analysis of stress measurements References 12 Using stresses in rock engineering, geology and geophysics Introduction Stresses in civil rock engineering I have learned about leaky gut, inflammation, stress factors, pH factor - today's diets are overly acidic, the effects of emotional trauma, etc.
Finally, the book that I have been searching for - The Stress Effect - puts it all together with even more information (the emotional component of illness).Cited by: 4. dilatometer), in-situ stress measurements (rock stress determination, stress measurement using the CCBO technique, rock stress estimation: strategy for rock /or hydraulic testing of pre-existing fractures, quality control of rock stress estimation), geophysical testing.
Gonano, L.P. and Sharp, J.C. () Critical evaluation of rock behavior for in-situ stress determination using the overcoring method D.J. () Observations of the Kaiser effect under multiaxial stress states: implications for its use in determining in-situ stress.
A technique for determining the complete state of stress in rock using Cited by: 2. 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 Cited by: 3.“ISRM suggested methods for rock stress estimation - part 5: establishing a model for the in situ stress at a given site”, in Rock Mechanics Rock Engineering by Stephansson and Zang, This paper suggests the best way forward for deriving the final rock stress model for a site or an area.
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