The dynamic mechanical behaviour and characteristics of rocks have been investigated using different techniques. One of the commonly used technique is the Split Hopkinson Pressure Bar technique. However, the measured responses are inferred from the strain gauges attached to intermittent and transmitting bars rather than directly from samples. The authors devised a new experimental apparatus to investigate the behaviour of rocks under shock waves. The device may be fundamentally categorized as the drop-weight apparatus and it is possible to evaluate the mechanical behaviour and characteristics of rocks subjected to shock waves during pre-failure as well as post-failure stages. The rocks tested are tuff, limetsone, granite, marble, gneiss, porphyrite, ranging from soft rocks to hard rocks. The testing conditions correspond to uniaxial compression test and Brazilian tensile test. The nominal impact velocity can be easily adjusted and it can be easily correlated with the measured responses and dynamic mechanical properties. The authors present the outcomes of this experimental study and discuss their implications in the field of rock dynamics.
展开▼
