Research Article
Stability of a Roadway below a Coal Seam under Dynamic Pressure: A Case Study of the 11123 Floor Gas Drainage Roadway of a Mine in Huainan, China
Table 1
Design parameters of the monitoring hole in the 11123 floor gas drainage roadway.
| | Technical parameter | Monitoring hole | Technical parameter | Monitoring hole |
| | Angle with the roadway (°) | 30 | Drilling elevation angle (°) | 20 | | Distance between orifice and initial mining position (m) | 129.18 | Angle between borehole and inclined stratum (°) | 24 | | Actual hole length (m) | 46.2 | Control vertical height (m) | 18.79 |
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