Research Article
Study on the Upper Limit of Roof Failure in Soft Rock Roadway
Table 5
Parameters required for calculation of support strength.
| | Fracture angle (°) | Internal friction angle (°) | Cohesion (MPa) | Overburden density (N·m−3) | Width of the roadway (m) | Height h of the roadway (m) | Pressure coefficient | Overburden rock load (MPa) |
| | 28 | 34 | 1.08 | 25470 | 4.2 | 2.8 | 1 | 7.7 |
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