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本文阐述了保加利亚矿山采用水封与毫秒爆破相配合的措施,降低巷道掘进工作面空气含尘量的经验。保加利亚矿山为降低爆破后空气含尘量,成功地采用与炮眼内部和外部水封相配合的毫秒爆破,并在爆破前往长15—20米的巷道壁上洒水。在达斯柯洛沃矿山掘进长50—80米、断面4.5米~2平巷时进行了试验,试验时没采用人工通风,且岩石秸构、炮眼排列、炮眼直
This article elaborates on the measures taken by Bulgarian mines to adopt the combination of water seal and millisecond blasting to reduce the dust content in roadway heading face. Bulgarian mines have successfully used millisecond blasting in conjunction with the internal and external seal of the blasthole to reduce the amount of dust in the air after blasting and have been sprayed on the wall of the roadway 15-20 meters long after blasting. In the Das Collovna mine dredging 50-80 meters long, section 4.5 m ~ 2 lanes were tested, the test did not use artificial ventilation, and the rock structure, the hole arrangement, hole straight