关键词: 露天矿, 高精度导爆管, 毫秒延时爆破, 爆破振动

Abstract: In order to decrease the effect of blasting vibration on the surrounding residents and buildings, the method of millisecond blasting is adopted on the open cut mining. The test used high precision fuse blasting cap for the sake of the precision of the common detonators can’t meet the requirements of millisecond blasting. Based on the results of in site monitoring, this paper compared the peak velocities and duration of the blast used the high precision fuse blasting cap to the general blasting’s. Regressive analysis was made by using the Matlab software. The research shows that the vibration strength and duration in the blast using high precision fuse blasting cap decreases compared with the general blast’s, and the effect of decreasing vibration is reduced when the blast center distance increases.

Key words: high precision fuse blasting cap, millisecond delay blasting, peak velocity, duration