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| backfill material (1) |
| granulometric composition (1) |
| loosening coefficient (1) |
| mine rocks (1) |
| rock undercutting (1) |
| shearer (1) |
| stope face (1) |
| underground cavities (1) |
| backfill material (1) |
| granulometric composition (1) |
| loosening coefficient (1) |
| mine rocks (1) |
| rock undercutting (1) |
| shearer (1) |
| stope face (1) |
| underground cavities (1) |