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

<div>Curves of the clamping effect and the rock fragmentation effect along with the depth. (a) One-step blasting. (b) Two-step blasting. ((a) and (b) show the difference between one-step cutting blast and two-step cutting blast).</div>

Shock and Vibration

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Figure 3

Figure 3: Study of Two-Step Parallel Cutting Technology for Deep-Hole Blasting in Shaft Excavation 