Mechanical Mechanism and Propagation Law of Fissure-Tip Cracks of Large-Size Rock Specimens with Two Precut Fissures

<div>Diagram of specimen loading. <i>α</i>-Fissure dip angle, <i>β</i>-rock bridge dip angle, a-fissure length, b-rock bridge length, σ<sub>1</sub>-axial stress, σ<sub>2</sub>-lateral pressure.</div>

Shock and Vibration

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Figure 4

Figure 4: Mechanical Mechanism and Propagation Law of Fissure-Tip Cracks of Large-Size Rock Specimens with Two Precut Fissures 