THE RESEARCH ON THE INFLUENCE OF THE DETONATOR SEGMENTS ON THE STRIP MINE BENCH BLASTING SEISMIC EFFECT

The precision of detonators in the millisecond delay blasting directly influence the designing of the blasting network and the choosing of the subsection interval.The precision is also one of the main factors that influence the blasting quality and seismic effect.The segments of detonators directly influence the precision of detonators for the common millisecond delay detonator.So it has been deeply researched that the segments of detonators influence on the seismic effect.The research results show that the maximum segment explosive quantity does not indicate certainly the maximum vibration velocity in the multi-segments millisecond delay blasting. It means that it is conservative to use the maximum explosive quantity to calculate and check the safety vibration velocity in the national regulation of blasting safety, considering the fact that in most imine blasting and blasting engineering the common millisecond delay detonators are used. In this paper through the rasearch that different segments of the millisecond delay detonator influence the blasting seismic effect, the segments should be from No.6 to No.10 to fit HEISHAN iron mine blasting condetion and to have good blasting effect and good damping seismic effect. The best segment should be No.7