Research Article
Study on Deformation and Fracture Evolution of Underground Reservoir Coal Pillar Dam under Different Mining Conditions
Table 3
Orthogonal experiment range analysis Tab. (plastic zone development height).
| Factor | Length of working face/m | Width of coal pillar/m | Mining height/m | Water pressure/MPa |
| Average results of the first level | 12.38 | 14.75 | 14.38 | 15.25 | Average results of the second level | 15.00 | 15.00 | 14.63 | 15.50 | Average results of the third level | 15.63 | 15.63 | 15.25 | 15.88 | Average results of the fourth level | 19.50 | 17.13 | 18.25 | 16.13 | Range | 7.13 | 2.38 | 3.88 | 0.88 |
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