Research Article
Research on Hydraulic Fracturing Pressure Relief Technology in the Deep High-Stress Roadway for Surrounding Rock Control
Table 2
Some rock mechanics parameters of the numerical model.
| | Strata | Bulk modulus (K/GPa) | Shear modulus (K/GPa) | Cohesion (C/MPa) | Internal friction angle (φ/°) | Density (ρ/kg/m3) |
| | Coarse-grained sandstone | 3.5 | 1.5 | 2.31 | 32 | 2680 | | Medium-grained sandstone | 4.2 | 2.1 | 2.9 | 37 | 2670 | | Siltstone | 4.0 | 1.9 | 3.2 | 38 | 2670 | | Carbonaceous mudstone | 3.6 | 2.0 | 2.8 | 36 | 2680 | | 2# coal seam | 2.5 | 1.2 | 1.56 | 30 | 1380 | | Siltstone | 4.0 | 1.9 | 3.2 | 38 | 2670 |
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