Research Article
Study on Deformation and Fracture Evolution of Underground Reservoir Coal Pillar Dam under Different Mining Conditions
Table 5
Orthogonal experiment range analysis Tab. (maximum vertical deformation).
| Factor | Length of working face/m | Width of coal pillar/m | Mining height/m | Water pressure/MPa |
| Average results of the first level | 0.58 | 0.77 | 0.70 | 0.92 | Average results of the second level | 0.79 | 0.82 | 0.78 | 0.91 | Average results of the third level | 0.99 | 0.89 | 0.90 | 0.83 | Average results of the fourth level | 1.07 | 0.94 | 0.96 | 0.77 | Range | 0.50 | 0.17 | 0.26 | 0.15 |
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