By using the high pressure gas gun as power to accelerate plane plate

and the amphibole samples

which were subjected to the plane plate impacted with different impulses

have been recovered. Then these recovered amphibole samples have been studied by some micro-mine research techniques such as SEM

XRD and RAM. In this research

the stress intensity in the beginning phase of crack appearing and the extending shape of cracks have been confirmed. Based on the analyses of micro-examination for these recovered samples

the formation principle of crack is expounded and proved there is phase transition in the amphibole. These experimental results can provide a kind of new theoretic basis for the further studying of the explosion in mine exploitation

architecture engineering

etc.