Research Article
Analysis of Roof Deformation Mechanism and Control Measures with Roof Cutting and Pressure Releasing in Gob-Side Entry Retaining
Table 1
Rock mechanical parameters.
| | Lithology | Bulk density (kg/m3) | Bulk modulus (GPa) | Shear modulus (GPa) | Internal friction angle (°) | Cohesion (MPa) | Tensile strength (MPa) |
| | Sandy mudstone | 2652 | 2.54 | 1.38 | 30 | 1.3 | 0.43 | | Siltstone | 2610 | 10.9 | 8.58 | 30 | 17.2 | 5.75 | | Mudstone | 2570 | 7.87 | 6.40 | 38 | 2.07 | 1.68 | | Fine sandstone | 2630 | 6.68 | 1.40 | 28 | 1.66 | 1.70 | | Mudstone | 2570 | 7.87 | 6.4 | 38 | 2.07 | 1.68 | | Coal | 1360 | 1.9 | 0.93 | 26 | 0.84 | 0.28 | | Mudstone | 2570 | 7.87 | 6.4 | 38 | 2.07 | 1.68 | | Siltstone | 2610 | 10.9 | 8.58 | 30 | 17.2 | 5.75 | | Mudstone | 2570 | 7.87 | 6.4 | 38 | 2.07 | 1.68 |
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