Solution of Strain-Softening Surrounding Rock in Deep Tunnel Incorporating 3D Hoek-Brown Failure Criterion and Flow Rule

Table 2

Comparisons between the results of this paper and Sharan without considering the strain-softening and intermediate principal stress.

Parameter groups	Elastoplastic model			(Sharan)	(this paper)
1	e-p	40	0	1.77	1.7714
1	e-p	80	0	2.59	2.588
1	e-p	80	1	2.31	2.312
1	e-p	80	5	1.91	1.907
1	e-b-p	40	3	2.53	2.526
1	e-b-p	40	5	2.03	2.030
1	e-b-p	80	18	2.33	2.333
2	e-b-p	15	0	3.90	3.901
2	e-b-p	15	3	1.51	1.510
2	e-b-p	30	0	7.84	7.836
2	e-b-p	30	5	2.33	2.327