Research Article
Mine Pressure Behavior Characteristics and Control Methods of a Reused Entry that Was Formed by Roof Cutting: A Case Study
Table 1
Physicomechanical parameters of rock strata.
| | Name of stratum | Height D (m) | Bulk modulus K (GPa) | Shear modulus G (GPa) | Tensile strength T (MPa) | Cohesion c (MPa) | Internal friction angle φ (°) | Density ρ (kg/m3) |
| | Overlying strata | 100 | 7.02 | 4.63 | 0.64 | 1.27 | 40.91 | 2310 | | Siltstone | 10 | 4.51 | 3.11 | 0.48 | 0.85 | 39.69 | 2460 | | Medium sandstone | 10 | 4.99 | 3.59 | 0.48 | 1.08 | 40.81 | 2320 | | Alternating siltstone and mudstone | 30 | 7.61 | 5.48 | 0.62 | 1.44 | 39.21 | 2380 | | Medium sandstone | 14 | 5.46 | 4.27 | 0.58 | 1.12 | 41.33 | 2280 | | Siltstone | 2 | 4.81 | 3.92 | 0.39 | 0.92 | 38.45 | 2040 | | Coal seam | 4 | 3.95 | 3.22 | 0.36 | 0.85 | 39.69 | 1260 | | Siltstone | 10 | 10.23 | 8.33 | 1.22 | 2.05 | 40.81 | 2410 | | Fine sandstone | 20 | 3.78 | 3.08 | 0.85 | 1.75 | 38.42 | 2320 |
|
|
