直線爆破法(打大眼)就是在直線爆破中間部的連珠眼中,隔一個眼擴大為大眼,也就是實行兩次穿孔,先打小眼,再在小眼上套打大眼,使之成為大空洞(此大眼不裝炮),以便擴大自由面,創造爆破的有利條件的方法。一、試驗的動機与經過 青城子矿爆破手張永喜同志在工作中針對提高掘進率,降低消耗材料,特别是爆破中內部連珠眼之火藥消耗量過多的問題,考慮到如果將連珠眼打成槽形(溝形)空 Straight-line blasting method (playing big eyes) is in the straight shot blasting the middle of the Lianzhu eyes, every other eye widened to the big eye, which is the implementation of two perforation, first hit the small eye, and then put a big eye on the small eye, so that Become a large hole (this big eye cannon), in order to expand the free surface, to create favorable conditions for blasting methods. First, the test motivation and comrades in Qingchengzi mine Blasting Zhang Yongxi comrades in their work to improve drilling rates and reduce consumption of materials, especially blasting internal Lianzhu the gunpowder consumption too much, taking into account if the Lianzhuye hit into Groove (ditch) empty