Table 5 The relative errors of estimated UCS based on derived equations for sandstone.
No. | Actual UCS (MPa) | Estimated UCS using Eq. (1) | Estimated UCS using Eq. (2) | Estimated UCS using Eq. (3) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Value (MPa) | RE (%) | MAPE | Value (MPa) | RE (%) | MAPE | Value (MPa) | RE (%) | MAPE | ||
A | 81.53 | 59.27 | − 27.31 | 11.04 | – | – | – | 71.61 | − 12.17 | 28.65 |
B | 86.11 | 84.39 | − 2.00 | – | – | – | 101.96 | 18.40 | ||
C | 97.13 | 105.15 | 8.26 | – | – | – | 127.04 | 30.80 | ||
D | 85.88 | 93.57 | 8.95 | – | – | – | 113.05 | 31.63 | ||
E | 158.97 | 166.53 | 4.76 | – | – | – | 201.20 | 26.57 | ||
F | 112.35 | 111.47 | − 0.78 | – | – | – | 134.68 | 19.88 | ||
G | 81.71 | 61.07 | − 25.25 | – | – | – | 73.79 | − 9.69 | ||
H | 137.14 | – | – | – | 146.15 | 6.57 | 20.93 | 89.60 | − 34.66 | |
I | 105.01 | – | – | – | 91.60 | − 12.77 | 56.16 | − 46.52 | ||
J | 116.15 | – | – | – | 107.61 | − 7.35 | 65.98 | − 43.20 | ||
K | 131.70 | – | – | – | 96.64 | − 26.62 | 59.25 | − 55.01 | ||
L | 57.37 | – | – | – | 73.82 | 28.67 | 45.26 | − 21.11 | ||
M | 114.44 | – | – | – | 101.68 | − 11.15 | 62.34 | − 45.53 | ||
N | 72.47 | – | – | – | 111.17 | 53.39 | 68.16 | − 5.96 | ||
