光面爆破是降低建筑材料消耗、减少工伤事故和使喷射混凝土成为永久衬砌的主要技术措施。光面爆破的目的是,尽量减小对围岩的破坏,同时获得一个符合设计尺寸的隧道。采用特殊炸药,例如炸药可以减小围岩的破坏,此外还需增加炮眼个数,采用延时爆破,提商炮眼布置精度。解决这一问题的技术手段有多种,改变炮眼形状就是一种很好的方法,研制一种能钻出带有凹口的炮眼的装置。理论研究证明, Smooth blasting is to reduce the consumption of building materials, reduce accidents and to make the shotcrete to become a permanent lining of the main technical measures. The purpose of smooth blasting is to minimize the damage to the surrounding rock while obtaining a tunnel of a design size. The use of special explosives, such as explosives can reduce the destruction of the surrounding rock, in addition to the need to increase the number of blasthole, the use of delayed blasting, commercial blasting deployment accuracy. There are many technical means to solve this problem. It is a good way to change the shape of the hole, and to develop a device that can drill a hole with a notch. Theoretical studies show that,