Research Article
Improving the Stability of Subsurface Structures in Deep Metal Mines by Stress and Energy Adjustment: A Case Study
Table 3
Stable height calculation results based on the RMR evaluation.
| | Location (m) | RMR | Footage of advance (m) | Stable height (m) | Stand-up time (week) |
| | −930∼−972 | 69 | 4 | 20 | >4 | | −972∼−987 | 69 | 4 | 20 | >4 | | −987∼−1050 | 65 | 4 | 20 | >4 | | −1050∼−1073 | 65 | 4 | 17 | >3 | | −1073∼−1102 | 63 | 4 | 17 | >3 | | −1102∼−1153 | 69 | 4 | 16 | >2 | | −1153∼−1207 | 67 | 4 | 19 | >4 | | −1207∼−1250 | 69 | 4 | 20 | >4 | | −1250∼−1271 | 65 | 4 | 17 | >3 |
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