Abstract
This study aims to propose a method to estimate the vibration level (VL) of delayed blasting from its velocity wave. We consider that the wave is made of sequential impulsive waves. In the method, we first divide the velocity wave induced by delayed blasting into impulsive waves. Then, we calculate the VLs for the individual impulsive velocity waves. Finally, the VL of the delayed blasting wave is obtained from the VLs of individual impulsive velocity waves taking into account the attenuation characteristic of the vibration level meter. It was found that the proposed method is sufficiently useful to estimate the tendency of the change with time and the magnitude of the VL for recorded velocity waves induced by delayed blasting.
