Analysis and Application on Controlling Thick Hard Roof Caving with Deep-Hole Position Presplitting Blasting

<div>Attenuation curve of blasting velocity on the rock elements under different directions. (a)Horizontal direction (m/s). (b)Vertical direction (m/s).</div>

Advances in Civil Engineering

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Figure 13

Figure 13: Analysis and Application on Controlling Thick Hard Roof Caving with Deep-Hole Position Presplitting Blasting 