Lanjian Iron Ore Protection Adit Blasting Damping

LanJian Iron Mine of Mining Company , PanGang Group is an open pit mine in themoutain which adopted . Drift-repass -Railway transport as the means of transportatin. The adit chute is the main passageway which exporting ore and rocks of LanJian Iron mine with mining depth increasing continuously, blasting vibration has a serious effect on the safty of the adit that located below the slope which causes serious hidden danger.Through Combining theory analysis with the physical conditions of production in LanJian ,this paper studies the ways and metheds of damping blasting vibration. Some technical measures of damping blasting vibration can protect the safty of the adit chute , such as row MS blasting, hole MS blasting,row-hole slice MS blasting, down-hole double MS blasting. Herewith, it introduces their principle , the blasting parameters and the points of design and implementation . Through spot bursting test and date test of blasting vibration, these technical measures are proved that can protect the safty of the Drift-repass. Amony all kind of technigue , down-hole double MS blasting brings about striking effect of damping vibration . It can not only protects the safty of adit chute , but also gurantees the blasting quality. Simplifies working process and increases the economic benefits, which is a practical damping vibration scheme. It provides a guarantee to realize a sustained, stable and balanced production of LanJian Iron Mine.This achievements solved production bottlenec . It has great applicability and operabitlity . Also it has successful experiences for referencce and the promotional value in wide-ranging to other open pit mines of the kind.