Research Article
A Method Based on Elastic Mechanics for Judging Compound Hard Roof and Its Application
Table 3
Mechanics parameters of 1# and 2# hard roof and soft interlayer.
| | Parameter | Thickness (m) | Volume weight (kg/m3) | Compressive strength (MPa) | Tensile strength (MPa) | Elasticity modulus (GPa) |
| | 2# hard roof | 16.08 | 2534 | 59.3 | 10.5 | 27.5 | | Soft interlayer | 5.24 | 2728 | 39.6 | 6.0 | 12.1 | | 1# hard roof | 12.12 | 2534 | 59.3 | 10.5 | 27.5 |
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