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

Table 5

Parameter analyses.

H-B	Softening parameters	Groups		Nonassociated flow rule; (%)	Nonassociated flow rule; (%)	Nonassociated flow rule; (%)
2D	e-p	1	1.4591	0.6783	0.7897	0.8525
3D	e-p		1.2681	0.5621	0.6088	0.6337
2D			1.4771	0.7008	0.8276	0.8996
3D			1.2803	0.5773	0.6331	0.6629
2D	e-b-p		1.4807	0.7053	0.8327	0.9051
3D	e-b-p		1.2832	0.5809	0.6367	0.6666
2D	e-p	2	1.4591	0.6783	0.7897	0.8525
3D	e-p		1.2681	0.5621	0.6088	0.6337
2D			1.4602	0.6796	0.7919	0.8553
3D			1.2688	0.5629	0.6102	0.6354
2D	e-b-p		1.4604	0.6800	0.7923	0.8557
3D	e-b-p		1.2690	0.5632	0.6105	0.6357
2D	e-p	3	1.4591	0.6783	0.7897	0.8525
3D	e-p		1.2681	0.5621	0.6088	0.6337
2D			1.4727	0.6953	0.8195	0.8901
3D			1.2775	0.5738	0.6282	0.6574
2D	e-b-p		1.4777	0.7016	0.8273	0.8988
3D	e-b-p		1.2814	0.5787	0.6337	0.6632
2D	e-p	4	1.4591	0.6783	0.7897	0.8525
3D	e-p		1.2531	0.5877	0.6446	0.6751
2D			1.6778	0.9724	1.3501	1.5894
3D			1.4509	0.8046	1.0370	1.1740
2D	e-b-p		1.7339	1.0539	1.4379	1.6781
3D	e-b-p		1.4882	0.8584	1.0797	1.2092