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

Autor:	P. V. Nikolenko, M. D. Chepur, Shkuratnik Vladimir L
Rok vydání:	2020
Předmět:	Mechanical load Materials science Attenuation Thermal Axial load Geology Ultrasonic sensor Spectral analysis Composite material Geotechnical Engineering and Engineering Geology Porosity Maxima
Zdroj:	Journal of Mining Science. 56:695-705
ISSN:	1573-8736 1062-7391
DOI:	10.1134/s1062739120057019
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8286d00829fed1f1238d85c1127ad322 https://doi.org/10.1134/s1062739120057019 Zobrazit plný text záznamu Plný text ve formátu PDF