Estimation of stresses in a massive granite using laser ultra-sonic testing and stress memory effect

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F24%3A00559047" target="_blank" >RIV/60162694:G43__/24:00559047 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21110/23:00361309 RIV/00216208:11310/23:10472385

Result on the web

<a href="https://dspace.cvut.cz/handle/10467/107748" target="_blank" >https://dspace.cvut.cz/handle/10467/107748</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/AP.2023.63.0011" target="_blank" >10.14311/AP.2023.63.0011</a>

Result language

angličtina

Original language name

Estimation of stresses in a massive granite using laser ultra-sonic testing and stress memory effect

Original language description

This paper addresses in-situ stress-estimation methods based on the Kaiser effect. The physical and mechanical properties of granite, diorite, and granodiorite samples selected at different depth intervals of the core obtained from a wellbore were examined. The ultimate uniaxial compressive strength, modulus of elasticity, and Poisson’s ratio of the rock samples were determined using presses and strain gauges. Also, local longitudinal and shear wave velocities were measured using a high-accuracy laser-ultrasonic system with a view to assessing the structure of the samples. Based on the resulting elastic wave velocity maps, samples with no obvious discontinuities were chosen. These undisturbed samples were subjected to uniaxial compression and their acoustic emission was simultaneously measured. In-situ stresses were estimated from the results of the interpretation of acoustic emission measurements. The experimental in-situ stresses were compared with the results of a numerical simulation. The ratio of the estimated in-situ stresses to the calculated ones is within the range from 0.81 to 1.11. This means that the laser ultrasonic and acoustic emission methods make it possible to effectively estimate in-situ stresses in a rock mass and assess the degree of rock mass damage.

Czech name

—

Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

10505 - Geology

Project

<a href="/en/project/VB01000057" target="_blank" >VB01000057: Autonomous vehicle for conducting pyrotechnic exploring in extremely dangerous areas</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Polytechnica

ISSN

1210-2709

e-ISSN

1805-2363

Volume of the periodical

63

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

11-18

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-85160098865