Research Article
Influence Law of Interbedded Strata and Their Collapse on the Mining of Extremely Thick Coal Seam under Goaf
Table 1
The statistics of top coal, immediate roof, and main roof collapsing interval of 10 cm (5 m) interlayer.
| | No. | Name | Face advanced distance | Periodic roof weighting pace | | Model (cm) | Reality (m) | Model (cm) | Reality (m) |
| | 1 | 1st top coal caving | 46.0 | 23.0 | 46.0 | 23.0 | | 2 | 1st roof caving | 69.0 | 34.5 | 69.0 | 34.5 | | 3 | 1st roof weighting pace | 97.0 | 48.5 | 97.0 | 48.5 | | 4 | 1st periodic roof weighting | 110.0 | 55.0 | 13.0 | 6.5 | | 5 | 2nd periodic roof weighting | 143.0 | 71.5 | 33.0 | 16.5 | | 6 | 3rd periodic roof weighting | 198.0 | 99.0 | 55.0 | 27.5 | | 7 | 4th periodic roof weighting | 231.0 | 115.5 | 33.0 | 16.5 | | 8 | 5th periodic roof weighting | 268.0 | 134.0 | 37.0 | 18.5 | | 9 | Average | | | 34.2 | 17.1 |
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