Permeability Characteristic and Failure Behavior of Filled Cracked Rock in the Triaxial Seepage Experiment

Table 1

Seepage test results of cracked sandstone filled with gypsum mortar.

Conditions and results	1-1	1-2	1-3	1-4	1-5	1-6
Sample size (mm)
D	48.28	48.32	48.64	48.33	48.23	48.00
H	99.45	99.66	99.55	99.33	99.46	99.55
Crack length (%)	25	25	50	50	75	75
Density ρ (g cm^−3)	2.29	2.99	2.30	2.28	2.29	2.31
Elastic modulus E (GPa)	6.02	7.9	8.64	9.07	3.23	4.18
Confining pressure σ3 (MPa)	10.00	20.00	10.00	20.00	10.00	20.00
Pore pressure (top) (MPa)	7.00	7.00	7.00	7.00	7.00	7.00
Pore pressure (bottom) (MPa)	1.00	1.00	1.00	1.00	1.00	1.00
Osmotic pressure difference (MPa)	5.36∼5.83	5.32∼6.03	5.89∼5.94	5.80∼5.99	5.70	5.91∼5.98
Peak stress σ1t (MPa)	36.05	71.23	25.25	59.29	13.67	55.76
Peak strain	0.0212	0.0117	0.0137	0.0083	0.0038	0.0118
Permeability (Darzy)	1.55∼1.75	0.94∼1.21	4.19∼6.92	3.72∼5.26	8.30	6.83∼7.30