Research Article
The Influence of Heading Rate on Roof Stability in Coal Entry Excavation
Table 5
Results of the shear-compression test.
| | No. | Shear angle (°) | Normal stress (MPa) | Average normal stress (MPa) | Shear strength (MPa) | Average shear strength (MPa) |
| | 1 | 55 | 6.73 | 6.76 | 9.61 | 9.65 | | 2 | 55 | 6.29 | 8.98 | | 3 | 55 | 7.25 | 10.35 |
| | 4 | 60 | 5.08 | 4.88 | 8.81 | 8.45 | | 6 | 60 | 4.67 | 8.09 |
| | 7 | 65 | 3.49 | 3.36 | 7.49 | 7.20 | | 8 | 65 | 2.95 | 6.33 | | 9 | 65 | 3.63 | 7.79 |
|
|
