Failure Behavior of Thin Disc Sandstone under Coupled Bending-Seepage Condition

Table 1

Physical and mechanical properties of gray sandstone and red sandstone.

Lithology	Gray sandstone	Red sandstone
Uniaxial compressive strength (, MPa)	54.7	51.2
Tensile strength (, MPa)	5.02	4.71
Elastic modulus (, GPa)	32.0	29.2
Poisson ratio ()	0.23	0.16
Density (, kgm^-3)	2473	2574
Internal friction angle (, °)	47.8	43.0
Cohesion (, MPa)	21.2	22.9