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

Table 1

Basic parameters of the generalized Hoek-Brown criterion used for example study.

Rock type	Quality of rock mass	GSI	(MPa)	(GPa)
A	Very good	75	150	42	0.2	0.5	10.2	0.062
B	Average	50	80	9	0.25	0.51	2.01	0.0039
C	Very poor	30	20	1.4	0.3	0.52	0.657	0.0004
D	Very poor	—	30	38.0	0.3	0.3	—	0.55
E	Very poor	10	5	0.224	0.3	0.585	0.402	0.0000454