Experimental studies of marbles on response of shear-wave splitting to differential stress variation

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