ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The behavior of a jointed rock is different from that of an intact rock, and the characteristicsof elastic wave propagation in a jointed rock are different from those of an intact rock. In this study, arock resonant column testing device is designed to measure the longitudinal and flexural wavevelocities of jointed rocks under different states of stress. A column of more than 12 rock discs isstacked on a steel base, which acts as a free-fixed system. This configuration ensures that wavespropagate under an equivalent continuum condition, thereby rendering a constant and unique velocity.The effect of joint conditions on the wave velocities is investigated through rock resonant columntestings. The results show that velocities are sensitive to the state of stress and increase nonlinearlywith stress. The velocities are also affected by joint conditions such as roughness, spacing, and filling.The results are useful for rock mass classification based on near-surface geophysical characterization
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.306.pdf
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