Experimental Study on Immersion Effects of Pressure Water on the Tensile Characteristics of Sandstone Samples

Table 2

Mechanical energies applied to sandstone samples.

Immersion condition	Sample No.	/J
Dry	A-1	1.82
	A-2	1.68
	A-3	2.34
	Average value	1.95
Immersion in water at pressure of 0 MPa	B-1	1.47
	B-2	1.82
	B-3	1.33
	Average value	1.54
Immersion in water at pressure of 1 MPa	C-1	1.18
	C-2	1.33
	C-3	1.32
	Average value	1.28
Immersion in water pressure at of 3 MPa	D-1	1.23
	D-2	1.03
	D-3	1.34
	Average value	1.20