Research Article
Comprehensive Measurement of the Deformation and Failure of Floor Rocks: A Case Study of the Xinglongzhuang Coal Mine
Table 1
Design parameters of the boreholes.
| Borehole parameters | |
| Opening diameter (mm) | 110 | Diameter (mm) | 80 | Borehole elevation angle (°) | 75 | Angle between the drilling hole and the strike line of the coal and rock seam | 90 | Hole depth (m) | 38.3 |
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