Research Article
Study of the Roof Deformation Characteristics of Roadway Excavation Face and Unsupported Roof Distance
Table 2
Theoretical calculation parameters of maximum unsupported roof distance.
| | Overburden load p0 (MPa) | Support load p2 (MPa) | Peak load p3′ (MPa) | Bulk density γm (kN/m3) | Thickness hm (m) | Length of unstable zone L2 (m) | Length of limit equilibrium zone L3 (m) | Elastic modulus E (GPa) |
| | 0.191 | 0.19 | 35.1 | 25.8 | 7.4 | 2.579 | 0.579 | 18.5 |
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