Research Article
Determination of Optimal Extrication Location of High Extraction Roadway of Large-Mining-Height Fully Mechanized Face
Table 2
Moderate arrangement height of the high suction roadway.
| | Coal bed pitch | Overlying rock hardness | Roof management method | Ratio of moderate arrangement height and mining height (H/M) |
| | Gentle dip | Hard | All roof caving | 6∼18 | | Gentle dip | Medium hard | All roof caving | 5∼12 | | Gentle dip | Soft | All roof caving | 3∼9 | | Gentle dip | Weathering soft | All roof caving | 2∼7 | | Moderate dip | Medium hard | All roof caving | 5∼12 | | Steep dip | Hard | All roof caving | 7∼16 | | Steep dip | Medium hard | All roof caving | 5∼6 | | Steep dip | Medium hard | Filling | — |
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