Research Article
Study on Evolution Characteristics of Regenerated Roof Structure in Downward Mining of Bifurcated Coal Seam
Table 1
Theoretical calculation results of roof and floor strata mining damage thickness.
| | Borehole number | M (m) | Hc (m) | Hf (m) | L (m) | hmax (m) |
| | 69-70-2 | 2.80 | 8.71 | 34.65 | 3.96 | 6.28 | | 69-7 | 2.80 | 8.71 | 34.65 | 3.97 | 6.29 | | 67-69-2 | 2.80 | 8.71 | 34.65 | 3.99 | 6.33 | | 67-14 | 2.80 | 8.71 | 34.65 | 4.04 | 6.40 | | 68-67-2 | 2.80 | 8.71 | 34.65 | 4.00 | 6.33 | | 68-14 | 2.80 | 8.71 | 34.65 | 4.00 | 6.34 |
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