|
Abstract Triaxial dynamic fatigue tests are conducted on sandstone under temperature of 30℃～125℃，confining pressure of 30 MPa and axial pressure of 40.7 MPa，with sine-wave frequency 0.05～5 Hz and its amplitude of 5.1 MPa. The results indicate that elastic wave velocities VP，VS and Young’s modulus E of sandstones are all decreased and then increased with temperature，and they display strong dispersion effect with frequency. There exists a large variation of velocity with temperature and frequency, which can be applied as the omens of earthquake or fatigue damage.
|
|
Received: 30 December 2002
|
|
|
|
