The Numerical Simulation of Hard Rocks for Tunnelling Purposes at Great Depths: A Comparison between the Hybrid FDEM Method and Continuous Techniques

Table 2

Experimental values (average value and range) of the mechanical properties of the intact Lac du Bonnet granite [44].

Mechanical property	Value
Young’s modulus (GPa)	69.0 ± 5.8
Poisson’s ratio	0.22 ± 0.04
Unconfined compressive strength (UCS) (MPa)	213 ± 20
Crack initiation stress (CI) (MPa)	90
Crack damage stress (CD) (MPa)	172
Tensile strength (MPa)	9.3 ± 1.3
Cohesion (MPa)	30
Friction angle (°)	59