导爆管非电微差中间拉槽对称起爆方法,是用导爆管微差雷管在采矿工作面(进路进端)扇形孔中间最深的两个炮孔最先起爆拉槽,而后向扇形孔两侧微差对称起爆。这样,孔与孔崩落的矿石动能大,增加了同爆孔矿石相撞力,使大块率显著下降。我矿试验此法效果良好,并已推广应用于井下采矿,在短短的8个月中,共爆矿12.8万吨。据统计,每吨矿石爆破成本降低0.349元,共节约爆破费用四万多元。 Induction pipe non-electrical differential middle slot symmetric initiation method is to use the detonating tube micro-differential detonator in the mining face (into the road) the deepest fan-shaped hole in the middle of the first two blasting detonator, and then fan The holes on both sides of symmetry symmetric initiation. In this way, the kinetic energy of the hole and the hole caving ore is large, which increases the colliding force with the hole blasting ore so that the bulk rate drops significantly. I mine test this method works well, and has been widely used in underground mining, in just eight months, a total of 128,000 tons of blasting. According to statistics, blasting costs per ton of ore to reduce 0.349 yuan, a total cost savings of blasting more than 40,000 yuan.