Analysis of V Detonation Technique Applied in Surface Iron Mine Blasting

In order to explore the effect of V detonation technique on blasting boulder rate and blasting vibration in the Surface Iron Mine,the blasting parameters were adjusted and optimized.With the average rock fragmentation forecasting model(Kuznetsov) and rock fragmentation distribution model(Rosin-Rammler),the V type blasting technology effect on reducing the block rate was discussed.With theoretical calculation,the blasting boulder rate was obtained as about 3.47% and the block uniformity index 1.63,which showed that the uniformity was good enough.According to the critical condition of blasting vibration with Sa Rodolfo J-Ki experience formula,the biggest single charge was obtained as less than 650 kg.Combined with blasting parameters optimization and the V model detonation technique,the rock large rate and blasting vibration got reduced effectively.