Research Article
Ground Subsidence Evolution from 1000 m Deep Mining: A Case Study in Fengfeng Mining Area
Table 1
Coal seam characteristic table.
| | Name of coal seam | Thickness (m) | Distance to upper or lower seams (m) | Stability in mineability | Bulk density (t/m3) | Lithology of roof and floor | | Roof | Floor |
| | Coal 2 | 4.04 | 25.0 | Stable mineable | 1.40 | Sandstone and sandy mudstone | Mudstone and sandy mudstone | | Coal 3 | 0.60 | 18.0 | Relatively stable
Local mineable | 1.50 | Mudstone and sandy mudstone | Mudstone | | Coal 4 | 1.40 | 31.5 | Stable
Mineable | 1.50 | Limestone | Sandstone and sandy mudstone | | Coal 6 | 1.40 | 15.5 | Stable partially mineable | 1.50 | Sandstone and limestone | Mudstone and sandy mudstone | | Coal 7 | 0.98 | 23.0 | Relatively stable
Temporarily unavailable | 1.50 | Limestone | Sandy mudstone | | Coal 8 | 1.15 | 5.0 | Relatively stable
Temporarily unavailable | 1.50 | Limestone | Mudstone and sandy mudstone | | Coal 9 | 2.35 | 6.0 | Relatively Stable
Temporarily unavailable | 1.50 | Limestone and sandy mudstone | Mudstone and sandy mudstone |
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