Research Article

Research and Analysis on the Influence of Small Clear Distance Drilling and Blasting Method on the Existing Tunnel Structure

Table 2

Partial explosive parameters.

Name of explosiveCartridge diameter (mm)Explosive density (g/cm3)Explosive detonation velocity (m/s)

EL-102 emulsion oil201.053500
No. 2 rock explosive221.12100∼3000
No. 3 rock explosive221.01600∼1800