Research on Rock Resistant Coefficient in Lining Tunnels Based on the Generalized Hoek-Brown Failure Criterion

Table 2

The parameters of reference state.

(GPa)		(MPa)	(MPa)	(m)	(MPa)					(MPa/m)
9	0.25	20	2	3	80	1.2	2	0.003	0.5	245.8