Study on Pressure Relief Effect and Rock Failure Characteristics with Different Borehole Diameters

<div>Failure morphology of samples with different borehole diameters: (a) <i>D</i> = 0 mm; (b) <i>D</i> = 6 mm; (c) <i>D</i> = 8 mm; (d) <i>D</i> = 10 mm.</div>

Shock and Vibration

fig6

Figure 6

Figure 6: Study on Pressure Relief Effect and Rock Failure Characteristics with Different Borehole Diameters 