Table 7.

Engineering parameters and Hoek and Brown failure criterion of the main units of site rock mass

Geotechnical unitRMR89GSImiaSmbDisturbance factor (D)Tensile strength (MPa)UCS (MPa)Deformation modulus (GPa)Cohesion (MPa)Friction angle (°)
Ja68–7863–83130.5010.0233.130.70.47.3102.142
AS156–7951–74120.5020.0072.010.50.2471.738
AS256–7951–74100.5020.0041.270.70.12.741.334
AS356–7951–74100.5020.0041.270.70.12.741.334