EXPERIMENTAL STUDIES OF MARBLES ON RESPONSE OF SHEAR-WAVE SPLITTING TO DIFFERENTIAL STRESS VARIATION

Using DZ95 multi-channel instananeous waveform recorder and GC-100engineering multiple wave parameter analytical instrument the shear-wave splitting isobserved and studied for Laizhou marbles of Shandong of China are With theincrement of loading, the splitting of shear-wave takes place and the time delay ofshear-wave splitting will change obviously. In most specimens, time delay increasesquickly just before it is destroyed. The phenomena are different at different specimenand different azimuth. Sometime the time delay falls down before it increases. Undersome pressure, time delay also increases when the level of press keeps even unloading.This kind of phenomenon is called "Inertia Development". In this experiment someevents of acoustic emission are also recorded, and the shear-wave splitting can also beobserved clearly, as those from the man made source emission.