Research Article
Analysis of the Occurrence Mechanism for Coal and Gas Outburst Based on Multiple Discriminant Indices
Table 1
Lithology and thickness of the roof and floor of Panel 31020.
| Name | Lithology | Feature description | Thickness |
| Main roof | Fine sandstone | Gray fine sandstone with a small number of patches at the top, sandy mudstone, mica sheets, and strips at the middle and lower parts | 10.9 m | Immediate roof | Sandy mudstone | Gray-black sandy mudstone, dense, mica-bearing fragments | 4.01 m | Immediate floor | Mudstone | Gray mudstone | 0.3 m | Main floor | Sandy mudstone | Gray sandy mudstone, massive | 1.5 m∼12 m |
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