Study of Two-Step Parallel Cutting Technology for Deep-Hole Blasting in Shaft Excavation

<div>Charge structure of one-step blasting and two-step blasting (1- stemming; 2- explosive detonated by 1#detonator; 3- explosive detonated by 2#detonator). (a) One-step blasting. (b) Two-step blasting.</div>

Shock and Vibration

fig1

Figure 1

Figure 1: Study of Two-Step Parallel Cutting Technology for Deep-Hole Blasting in Shaft Excavation 