Table 10 Indicator weights.
Primary indicator | Secondary indicator | Entropy value (e) | Utility value (g) | Weight coefficient (W) |
|---|---|---|---|---|
Mining condition B1 | Geological structure complexity C1 | 0.5232 | 0.4768 | 0.0775 |
Average buried depth C2 | 0.6010 | 0.3990 | 0.0648 | |
Coal seam dip angle C3 | 0.4778 | 0.5222 | 0.0849 | |
Spontaneous combustion tendency C4 | 0.3930 | 0.6070 | 0.0987 | |
Goaf area C5 | 0.6165 | 0.3835 | 0.0623 | |
CBM resources B2 | CBM emission C6 | 0.4871 | 0.5129 | 0.0833 |
Coal seam thickness C7 | 0.4531 | 0.5469 | 0.0889 | |
Maximum CBM content C8 | 0.4577 | 0.5423 | 0.0881 | |
Water accumulation in the goaf C9 | 0.4870 | 0.5130 | 0.0834 | |
Water-free space in the goaf C10 | 0.8795 | 0.1205 | 0.0196 | |
Residual coal resources C11 | 0.5171 | 0.4829 | 0.0785 | |
Economic conditions B3 | Construction cost C12 | 0.4624 | 0.5376 | 0.0874 |
Estimated output value C13 | 0.4914 | 0.5086 | 0.0827 |
