Table 3 The parameters in Eq. (15) for cohesion estimation.
From: Estimation of rocks’ failure parameters from drilling data by using artificial neural network
i | W11 | W12 | W13 | W14 | W15 | W2 | b1 | b2 |
|---|---|---|---|---|---|---|---|---|
1 | − 0.4626 | 3.9477 | 0.3820 | − 3.7261 | − 2.7384 | 4.5612 | − 3.0487 | 0.7534 |
2 | − 1.7512 | 0.3995 | − 0.9573 | − 1.8493 | − 3.4812 | 3.6093 | − 2.9639 | |
3 | 3.4467 | − 2.6912 | − 2.0344 | 1.3955 | − 2.3160 | − 4.0910 | 1.3472 | |
4 | − 3.3115 | 1.7078 | 4.7183 | 5.1277 | 2.3778 | − 2.3839 | 6.4843 | |
5 | − 0.6096 | 3.5467 | 2.1475 | − 1.8022 | − 3.9018 | 3.0889 | − 5.0166 | |
6 | 0.8459 | 0.1030 | − 3.4423 | − 4.0818 | − 0.7629 | 3.1857 | − 1.7508 | |
7 | 0.5604 | − 3.5778 | 1.7044 | − 2.2264 | − 2.1836 | − 3.4758 | − 2.8909 | |
8 | − 0.1979 | − 1.4184 | 2.8321 | 0.3343 | 4.5631 | 3.7736 | − 1.2807 | |
9 | − 3.4217 | 3.5302 | − 3.4351 | 4.5828 | − 6.1035 | − 2.6635 | − 0.2858 | |
10 | − 4.2223 | 2.7503 | 4.2267 | − 0.8829 | 3.5359 | − 2.7252 | − 1.6227 | |
11 | 3.9493 | 3.0739 | 0.3628 | − 3.9052 | − 2.3685 | − 3.9817 | − 2.5630 | |
12 | − 4.2528 | 1.6032 | − 3.4292 | 3.6714 | − 1.5528 | − 2.6967 | 1.2954 | |
13 | 2.1650 | − 1.1716 | 3.8909 | 0.7559 | − 2.0511 | 5.9139 | 4.6457 | |
14 | 4.7619 | 3.4076 | 0.9669 | − 0.3775 | − 1.4343 | − 5.3146 | − 2.5483 | |
15 | 0.9869 | 6.1320 | 0.7224 | − 2.9455 | − 1.6232 | − 5.5960 | 1.1852 | |
16 | 5.2747 | 2.0909 | − 5.1466 | 5.5499 | 4.9855 | − 1.9117 | 1.4404 | |
17 | 3.7714 | 6.0683 | − 1.5366 | 2.6079 | 1.2224 | 2.7830 | − 3.3447 | |
18 | − 0.9427 | − 0.0848 | 3.2698 | 2.5618 | 8.5606 | 1.8185 | 2.7887 | |
19 | − 4.6161 | 3.7344 | − 0.3284 | − 0.1666 | 1.2752 | − 5.2042 | − 0.3783 | |
20 | 0.2343 | − 0.2793 | − 2.8602 | − 3.2140 | − 2.4216 | 3.9275 | 2.1866 | |
21 | 1.3340 | − 0.3624 | − 1.1518 | − 2.5195 | − 5.1351 | − 5.3687 | − 4.8506 | |
22 | 5.5159 | 2.9003 | − 0.5477 | 3.7368 | 1.3668 | 5.8258 | − 5.0941 | |
23 | − 1.3679 | 4.0048 | 6.0178 | 0.1877 | − 3.3167 | 1.6285 | 0.7768 | |
24 | − 2.9959 | 3.2193 | − 0.6533 | 3.8584 | − 1.9523 | 3.3315 | 3.4024 | |
25 | − 1.3169 | − 0.3113 | 4.0184 | 4.7077 | − 2.3668 | − 3.3486 | 5.8567 | |
26 | − 7.8940 | − 4.3963 | 0.4776 | − 0.4482 | − 0.0418 | 5.0919 | 5.7940 | |
27 | − 4.0545 | 0.3185 | 2.4356 | − 4.3961 | − 4.1931 | − 3.6754 | − 1.9184 | |
28 | − 1.5350 | − 2.0027 | − 1.1113 | 3.5188 | − 0.7597 | − 3.3823 | − 1.4046 | |
29 | − 1.2392 | 1.4004 | − 1.9070 | 2.6803 | − 3.0978 | 7.9737 | 0.2013 | |
30 | − 6.1130 | − 1.5863 | − 2.5822 | − 1.6123 | 1.0860 | − 3.5113 | 0.7738 |
