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Rock Mass
Linked via "Mohr-Coulomb criterion"
Discontinuity Persistence and Shearing Resistance
The shear strength along a discontinuity surface ($\tau_f$) is critical for slope stability and excavation support. It is commonly modeled using the Mohr-Coulomb criterion, adapted for rock joints:
$$\tauf = c + (\sigman - u) \tan(\phi_j)$$