Research on the Deformation Mechanism and Directional Blasting Roof Cutting Control Measures of a Deep Buried High-Stress Roadway

<div>Effective stress distribution of three-hole directional fracture blasting. (a) <i>t</i> = 5 us; (b) <i>t</i> = 60.5 us; (c) <i>t</i> = 164 us; and (d) <i>t</i> = 479 us.</div>

Shock and Vibration

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Figure 7

Figure 7: Research on the Deformation Mechanism and Directional Blasting Roof Cutting Control Measures of a Deep Buried High-Stress Roadway 