在光面爆破中,孔距S与抵抗线B之间的关系是由经验确定的,关于S/B的适当取值范围目前仍有不同看法。在分析柱状装药近自由面爆破破碎过程的试验结果后,本文提出了判断抵抗线妥当与否的破碎判据,由波在自由面的反射与波在空孔周围所引起的动应力集中而定出了S/B的取值范围,与经验数据基本符合。 In smooth blasting, the relationship between the hole spacing S and the resistance line B is empirically determined, and there are different views on the proper range of values ​​for S / B. After analyzing the experimental results of columnar charge near free-surface blasting, this paper presents a criterion for judging the appropriateness of the line of resistance. The criterion is that the dynamic stress caused by the reflection of the wave on the free surface and the wave around the hole is concentrated. Set out the range of S / B, and empirical data are basically in line.