The quality of contour blasting depends on many initial blasting parameters. The parameters including blasthole diameter, rock Protodyakonov coefficient, tunnel area and distance between cracks on the tunnel face are more important. In this study, an algorithm linking between Delphi programming language and AutoCAD was created to develop a tunnel blasting model. Using this model, tunnel contour blasting passport in AutoCAD can be obtained automatically. The effects of rock Protodyakonov coefficient and cracks’ distance on blastholes number and specific charge with the variation of blasthole diameter and the semi-circular tunnel face area were investigated to yield a set of equations with the highest correlations. The results show that specific charge increases as rock Protodyakonov coefficient, cracks’ distance and drillhole diameter increase, but decreases when tunnel face area increases. In addition, the number of drillholes increases linearly as tunnel face area increases but decreases when drillhole diameter increases.

轮廓喷砂的质量取决于许多初始喷砂参数。包括爆破孔直径，岩石Protodyakonov系数，隧道面积和隧道表面裂缝之间的距离在内的参数更为重要。在这项研究中，创建了Delphi编程语言和AutoCAD之间的链接算法，以开发隧道爆破模型。使用此模型，可以自动获取AutoCAD中的隧道轮廓爆破护照。研究了岩石Protodyakonov系数和裂纹间距对爆破孔数和比电荷的影响，随着爆破孔直径和半圆形隧道工作面面积的变化，得出了一组相关性最高的方程。结果表明，随着岩石Protodyakonov系数，裂缝距离和钻孔直径的增加，比电荷增加，但随着隧道工作面面积的增加而减小。另外，钻孔的数量随着隧道工作面面积的增加而线性增加，但随着钻孔直径的增加而减少。