Research Article

Creep Investigation on Shale-Like Material with Preexisting Fissure under Coupling Temperatures and Confining Pressures

Figure 13

SEM results of cracks surface of shale-like material after creep experiments. (a) Room temperature, confining pressure 0 MPa. (b) Temperature 60°C, confining pressure 0 MPa. (c) Room temperature, confining pressure 7 MPa. (d) Temperature 60°C, confining pressure 7 MPa.
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