Research Article
Case Study on the Stability Control of Broken Surrounding Rock in Roadway Excavation on the Edge of a Collapsed Stope Area
Table 3
Statistical results of the RQD values after grouting.
| | Drill number | Hole depth (m) | Inclination (°) | Elevation (m) | Coordinate line | RQD value (%) |
| | ZK1 | 25.0 | 28 | −240.0 | Y4 | 68.92 | | ZK2 | 35.0 | 0 | −240.0 | Y4 | 73.51 | | ZK3 | 34.0 | −29 | −240.0 | Y4 | 71.29 | | ZK4 | 43.0 | −64 | −240.0 | Y4 | 74.83 |
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