Biaxial Shear Crack Propagation Modes of Rock-Like Specimens with Prefabricated Fissures and Their Strength Characteristics

Figure 8

Test results on the dip angle of the prefabricated fissure and crack coalescence mode. Note: ① prefabricated fissure; ② shear crack; ③ secondary shear crack; ④ secondary tensile crack; ⑤ secondary tensile-shear crack.

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