A Time-Dependent Double Hardening Model for Soft Rock

Table 1

	ρt0 (g/cm^3)	B value (after IC)	σc′ (kPa)	Creep loading	Small strain cyclic loading
					End of IC	During shearing
UC	1.884	—	—	N	Y	N
CD_100	1.896	0.95	100	N	Y	N
CD_400	1.894	0.90	400	Y	Y	Y
CD_800	1.896	0.86	800	N	Y	Y
CD_1600	1.875	0.61	1600	Y	Y	Y
CD_2700	1.897	0.79	2700	Y	Y	Y