One Time Blasting Method of Full-face in Large Section Rock-roadway

The number of detonators was large, the series network with FD200 type exploder could not guarantee network quasi-explosive in one time blasting of full-face in large section rock-roadway, according to these problems, by calculating the parameters of the potential explosion, ground simulation test, it studied quasi-explosive conditions of blasting network. It introduced firing impulse K as testing key parameters of detonators quasi-explosive, and tested different connection method of blasting network to seek optimal connection method of one time blasting technology which was suitable for full-face. The results showed that for one time blasting 92 detonators of full-face, series parallel connection with two branches could guarantee network one time blasting successful.