预裂爆破是一种新的爆破技术。即是在介质中,在一条相应的直线上,布置一定间距和孔深的钻孔,以适量的炸药和相应的装药结构,在每孔或隔孔装药进行爆破,从而在介质中沿钻孔连线获得一条明显的,并具有一定宽度的贯穿裂缝。预裂爆破除了能控制超挖并获得良好的防震作用外,还可以减少大量繁杂的修边撬整工作。从而简化了施工工序,加快了施工速度,降低了工程造价。预裂爆破是在整个爆破区尚未爆破之前进行的,在爆破区与保留区之间形成了预裂面,其防震作用比惯用的防震孔显著。按冲击波反射拉应力破坏理论,在爆破区进行爆破所产生的冲击波传至预 Presplitting blasting is a new blasting technique. That is, in the medium, in a corresponding straight line, the layout of a certain distance and hole depth of drilling, with the appropriate amount of explosives and the corresponding charge structure, each hole or hole charge blasting, so along the media Borehole connection to obtain a clear, and has a certain width through the cracks. In addition to the presplit blasting can control over-excavation and get a good anti-vibration effect, but also can reduce a large number of complicated trimming pruning work. Thus simplifying the construction process, speeding up the construction speed and lowering the construction cost. Presplitting blasting is carried out before the entire blasting area has not been exploded, and a pre-cracking surface is formed between the blasting area and the reserved area. The anti-shock effect is more significant than the conventional earthquake-resistant holes. According to shock wave reflection stress failure theory, blasting blasting blast generated by the impact of pre-transmission to the pre-