Experimental Study on Mechanical Properties and Acoustic Emission Characteristics of Water Bearing Sandstone under Stable Cyclic Loading and Unloading

Table 1

The uniaxial compression experiment calculation results.

Test number	Water content rate	Uniaxial compressive strength, σc (MPa)	Average uniaxial compressive strength, σc (MPa)	Elastic modulus, E (GPa)	Average elastic modulus, E (GPa)	Poisson’s ratio,	Average Poisson’s ratio,
C-10-1	0.5% (natural state)	64.149	61.334	122.250	125.922	0.128	0.157
C-10-2		60.505		127.438		0.170
C-10-3		59.350		128.079		0.174
C-40-1	2.0%	38.630	37.657	95.404	92.964	0.358	0.338
C-40-2		37.960		95.900		0.333
C-40-3		36.380		87.589		0.321
C-70-1	3.5%	33.110	32.422	85.450	84.854	0.394	0.395
C-70-2		32.081		83.078		0.390
C-70-3		32.075		86.034		0.401
C-100-1	5% (saturated state)	28.720	28.518	77.230	75.968	0.445	0.439
C-100-2		26.734		79.122		0.429
C-100-3		30.101		71.553		0.444