Experimental Study on Fracture Patterns and Crack Propagation of Sandstone Based on Acoustic Emission
Table 1
Basic physical and mechanical parameters of sandstone.
Experimental mode
Specimen number
Specimen size4 (mm)
Mass (g)
Strength (MPa)
Tensile
Shear
Uniaxial compressive
Brazilian split1
BT-1
D49.20 × T25.70
113.50
3.20
–
–
BT-2
D49.10 × T25.70
112.00
2.65
–
–
BT-3
D49.10 × T25.70
110.80
3.07
–
–
Preset angle shear2
CS-1
L50.60 × W50.20 × H50.20
297.40
–
23.21
–
CS-2
L50.50 × W50.50 × H50.24
300.00
–
19.79
–
CS-3
L50.54 × W50.50 × H50.50
300.40
–
19.33
–
Uniaxial compression3
UC-1
D49.10 × H100.74
439.40
–
–
79.56
UC-2
D49.02 × H100.86
439.60
–
–
91.64
UC-3
D49.10 × H100.48
440.40
–
–
84.99
1The average tensile strength is 2.97 MPa. 2The average shear strength is 20.78 MPa. 3The average uniaxial compressive strength is 85.40 MPa. 4Specimen size, D is diameter; T is thickness; L is Length; W is width; H is height.
