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| coal (2) |
| displacements (1) |
| double-unit stopes (1) |
| mine (2) |
| mine working (2) |
| rock mass (1) |
| rocks (1) |
| stress-strain state (1) |
| coal (2) |
| displacements (1) |
| double-unit stopes (1) |
| mine (2) |
| mine working (2) |
| rock mass (1) |
| rocks (1) |
| stress-strain state (1) |