THE EFFECT OF LIMESTONE POROSITY ON THE VELOCITY OF P- AND S-WAVES UNDER MECHANICAL AND THERMAL LOADING

The thermal and mechanical tests of different porosity limestone show that an increase in the axial load results in the higher velocities of elastic waves while elevation of temperature decreases them. Higher temperatures act to raise velocities of P- and S-waves with increasing mechanical load, whi...

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Bibliographic Details
Published in:Journal of mining science 2020-09, Vol.56 (5), p.695-705
Main Authors: Nikolenko, P. V., Shkuratnik, V. L., Chepur, M. D.
Format: Article
Language:English
Subjects:
Acoustic attenuation
Analysis
Axial loads
Control stability
Earth and Environmental Science
Earth Sciences
Elastic waves
Geomechanics
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
High temperature
Limestone
Mechanical properties
Mechanical tests
Mineral Resources
P waves
Porosity
Rocks
S waves
Sensitivity enhancement
Spectral analysis
Spectral sensitivity
Spectrum analysis
Strain
Stress measurement
Structural stability
Temperature
Ultrasonic attenuation
Underground structures
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Summary:The thermal and mechanical tests of different porosity limestone show that an increase in the axial load results in the higher velocities of elastic waves while elevation of temperature decreases them. Higher temperatures act to raise velocities of P- and S-waves with increasing mechanical load, which enhances acoustic strain-sensitivity of rock. The spectral analysis of the recorded signals shows that higher temperature shifts spectrum maxima to lower frequency region. It is found that size of pores has influence on attenuation frequency of ultrasonic signals. The authors describe new approaches to acoustic strain-sensitivity control in rocks and to stress measurement reliability enhancement toward stability of underground structures.
ISSN:1062-7391
1573-8736
DOI:10.1134/S1062739120057019