Research on Millisecond Subsection Blasting Scheme of Digital Electronic Detonator in a Roadway Excavation
In order to determine the millisecond blasting scheme of digital electronic detonator in An-hui mining roadway excavation,three different segmented blasting test schemes were designed through theo-retical calculation.Through the field test,the hole utilization rate,blasting pile shape and blasting vibration of each scheme are analyzed.The results show that the number of detonator segments has little effect on the utilization rate of blast hole and the shape of blasting pile.With the increase of the number of segments,the bulk rate of surrounding rock after blasting is reduced,the blasting vibration is relatively reduced,the dis-turbance to the surrounding rock is small,and the blasting effect is better.The 10-segment millisecond blasting scheme of digital electronic detonator for roadway excavation was determined.
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