为适应大理石切割控制爆破的特殊要求,需要用特殊的凿岩爆破方法。这种方法在于建立合理的炮眼结构及有关参数和岩石之间的力学关系,以便改变静态胀裂剂(或动态爆破)能量在炮眼周壁上的应力分布,使之具有较强的方向性。为控制开裂点的位置和裂缝发展的方向,以及形成平整的断裂面,伊藤一郎等曾采用加密炮眼的方法作为破裂导向;W.L.Fourney用留韧带的钢管装药结构形式也进行了探讨;U.Langefors等人在炮眼壁上做成预切槽,这些试验都能人为地改变静态胀裂剂能量的作用方向,使 To meet the special requirements of marble cutting control blasting, you need to use a special blasting method. This method is to establish a reasonable relationship between the structure of the blasthole and the relevant parameters and the rock in order to change the stress distribution of static crack agent (or dynamic blasting) energy in the peripheral wall of the blasthole so that it has a strong directionality. In order to control the position of crack point and the direction of crack development, and to form a flat fracture surface, Ito Ichiro et al. Used the method of encrypted blasthole as rupture guide. The structure of the steel tube charge for retaining ligament of WLFourney was also discussed. Langefors et al. Fabricated precut grooves in the borehole wall. These tests artificially alter the direction of action of static cracker energy