Theoretical and Numerical Research on V-Cut Parameters and Auxiliary Cuthole Criterion in Tunnelling

Table 3

Material and state equation parameters of the rock (sandstone) [28].

Density (kg/m^3)	Modulus of elasticity (GPa)	Poisson ratio	Yield stress (MPa)	Tangent modulus (GPa)	Hardening coefficient
2350	61.0	0.31	75.0	2.0	1.0