Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths

Table 2

Mechanical parameters of drained sandstone obtained from triaxial compression test.

Sample number	(MPa)	(MPa)	(MPa)	(MPa)	(MPa)	(MPa)	GPa
SY-1	0	0	106.88	65.77	72.31	23.27	32.92	0.486	0.615
SY-2	5	0	123.89	58.83	90.48	25.31	33.33	0.394	0.475
SY-3	5	1	126.53	71.57	98.81	35.93	25.99	0.286	0.566
SY-4	5	3	93.60	53.27	88.73	23.07	23.15	0.263	0.569
SY-5	10	0	150.68	80.91	119.36	30.35	34.01	0.328	0.537
SY-6	10	1	145.10	73.45	131.57	27.56	27.96	0.292	0.506
SY-7	10	3	128.04	60.26	111.22	30.40	27.58	0.295	0.471
SY-8	15	0	175.95	95.90	165.56	38.03	35.21	0.278	0.545
SY-9	15	1	156.26	78.57	137.38	43.80	31.97	0.246	0.503
SY-10	15	3	146.08	74.45	144.86	58.17	31.53	0.368	0.510

¹Confining pressure, ²pore pressure, ³peak strength, ⁴crack initiation stress, ⁵expansion stress, ⁶crack closure stress, ⁷elastic modulus, ⁸Poisson’s ratio.