Research Article
Analysis of Stability Factors of Roadway Roof and Determination of Unsupported Roof Distance
| | Program | Depth (m) | Unsupported roof length (m) | Thickness of soft rock roof (m) |
| | a-1 | 500 | 1.0 | 2.0 | | a-2 | 550 | 1.0 | 2.0 | | a-3 | 600 | 1.0 | 2.0 | | a-4 | 650 | 1.0 | 2.0 | | b-1 | 550 | 1.0 | 2.0 | | b-2 | 550 | 2.0 | 2.0 | | b-3 | 550 | 3.0 | 2.0 | | b-4 | 550 | 4.0 | 2.0 | | c-1 | 550 | 1.0 | 1.0 | | c-2 | 550 | 1.0 | 2.0 | | c-3 | 550 | 1.0 | 3.0 | | c-4 | 550 | 1.0 | 4.0 |
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