Table 2 Results of laboratory experiments on sandstone and corresponding STD and COV.
Sample No. | Sample description | Uniaxial compressive test UCS | Brazilian test BTS | ||
|---|---|---|---|---|---|
Magnitude ± STD (MPa) | COV (%) | Magnitude ± STD (MPa) | COV (%) | ||
A | Fine-grained sandstone | 81.53 ± 3.16 | 3.88 | 3.94 ± 0.81 | 20.56 |
B | 86.11 ± 1.95 | 2.26 | 5.61 ± 0.10 | 1.78 | |
C | 97.13 ± 0.70 | 0.72 | 6.99 ± 1.67 | 23.89 | |
D | 85.88 ± 7.79 | 9.07 | 6.22 ± 1.58 | 25.40 | |
E | 158.97 ± 12.13 | 7.63 | 11.07 ± 1.64 | 14.81 | |
F | 112.35 ± 12.39 | 11.03 | 7.41 ± 2.19 | 29.55 | |
G | 81.71 ± 8.00 | 9.79 | 4.06 ± 0.80 | 19.70 | |
H | Coarse-grained sandstone | 137.14 ± 3.42 | 2.49 | 4.93 ± 1.04 | 21.10 |
I | 105.01 ± 22.39 | 21.32 | 3.09 ± 1.09 | 35.28 | |
J | 116.15 ± 7.21 | 6.20 | 3.63 ± 0.92 | 25.34 | |
K | 131.70 ± 32.43 | 24.62 | 3.26 ± 0.64 | 19.63 | |
L | 114.44 ± 25.14 | 21.97 | 2.49 ± 0.42 | 16.87 | |
M | 57.37 ± 0.59 | 1.03 | 3.43 ± 0.88 | 25.66 | |
N | 72.47 ± 15.00 | 20.69 | 3.75 ± 0.78 | 20.80 | |
