Research Article
Study on In Situ Stress Measurement and Surrounding Rock Control Technology in Deep Mine
Table 4
Physical and mechanical parameters of rock.
| | Number | Rock properties | Shear modulus (GPa) | Bulk modulus (GPa) | Cohesion (MPa) | Tensile strength (MPa) | Internal friction angle (°) | Density (kg·m3) |
| | 1 | Sandstone | 1.6 | 2.7 | 2.1 | 1.6 | 38 | 2540 | | 2 | Medium sandstone | 2.5 | 3.3 | 4.0 | 2.2 | 37 | 2580 | | 3 | Mudstone | 1.5 | 1.7 | 1.8 | 1.4 | 39 | 2768 | | 4 | Coal | 0.5 | 1.0 | 1.2 | 0.6 | 35 | 1450 | | 5 | Siltstone | 3.6 | 4.3 | 7.1 | 10.2 | 33 | 2740 |
|
|
