In order to know the relationship between mechanical properties of rock and blasting vibration propagation laws during the process of blasting excavation in opencast iron mine, attenuation trends of blast vibration velocity in migmatite, granite, magnetite quartzite are studied by testing the mechanical parameters in blasting area and blasting vibration. What is more, explosive energy' utilization characters in the process of blasting are analyzed based on the blasting vibration data. The results show that different attenuation trends are showed in different directions on different rocks. Besides, explosive's energy availability factor is related to attenuation coefficient of the rock, it is shown that explosive's energy availability factors of granite and magnetite quartzite are inferior to that of migmatite. Furthermore, the integrity of rock structure can be estimated if the attenuation features of blasting vibration velocity are known, which can provide guidance to the optimization of blasting design.
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