Table 3 Differences in the mechanical properties of marble under different confining pressure conditions.
Confining pressure | Fracture characteristics | Post-peak deformation capacity | Peak stress | Cohesion | Friction angle |
|---|---|---|---|---|---|
Low confining pressure(<30 MPa) | Brittle failure | Insignificant | Significantly improve | Relatively low | Relatively high |
High confining pressure(≥30 MPa) | Ductile failure | Significant | The increase is not significant | Relatively high | Relatively low |
