Experimental Investigation of the Relationship between the P-Wave Velocity and the Mechanical Properties of Damaged Sandstone
Table 2
Characteristics of damaged specimens after different numbers of F-T cycles.
Specimen number
F-T Cycles
MCR /%
VCR /%
/m/s
UCS /MPa
E/GPa
ES
AV
ES
AV
ES
AV
ES
AV
ES
AV
G1
0
—
—
—
—
4092
64.2
12.0
G2
0
—
—
—
—
3987
59.6
11.2
G3
0
—
—
—
—
4068
4085
62.7
62.9
11.5
11.8
G4
0
—
—
—
—
4190
65.0
12.6
H1
10
0.46
0.34
3512
47.5
9.2
H2
10
0.43
0.25
3363
42.6
8.6
H3
10
0.31
0.42
0.32
0.32
3527
3470
43.1
44.8
7.9
8.6
H4
10
0.47
0.37
3476
45.8
8.8
I1
20
0.51
0.55
3002
32.3
6.8
I2
20
0.56
0.36
3127
37.8
7.2
I3
20
0.46
0.54
0.50
0.45
3014
3032
35.6
33.8
6.6
6.6
I4
20
0.63
0.37
2983
29.6
5.9
J1
30
0.72
0.49
3097
26.8
5.1
J2
30
0.53
0.58
2822
21.9
4.4
J3
30
0.68
0.63
0.46
0.53
2982
2945
28.0
26.1
5.8
5.0
J4
30
0.60
0.60
2879
27.7
4.6
K1
40
0.57
0.46
2910
22.0
4.1
K2
40
0.64
0.53
3242
21.7
4.1
K3
40
0.59
0.63
0.49
0.52
2954
3055
17.3
21.6
4.3
4.3
K4
40
0.71
0.58
3114
25.5
4.6
L1
50
0.53
0.43
2973
19.2
2.9
L2
50
0.69
0.50
2876
15.8
2.7
L3
50
0.48
0.58
0.55
0.48
3078
3026
17.1
17.3
3.4
3.2
L4
50
0.62
0.44
3176
16.9
3.6
Note: MCR is the mass change rate, VCR is the volume change rate, is the P-wave velocity, UCS is the uniaxial compressive strength, E is Young’s modulus, ES is each specimen, and AV is the average value.
