Research Article
Mechanical Analysis of Mining Stress Transfer on Isolated Island Face in Extra-Thick Fully Mechanized Top-Coal Caving Mining
Table 1
Mechanical parameters of coal–rock.
| Medium name | Shear modulus (GPa) | Bulk modulus (GPa) | Cohesion (MPa) | Friction angle (°) | Tensile strength (MPa) |
| Medium fine sandstone | 1.62 | 1.71 | 2.6 | 35 | 0.62 | Bedrock | 1.04 | 1.14 | 3.3 | 33 | 0.82 | Sandy mudstone | 0.91 | 0.86 | 3.3 | 37.5 | 2.25 | Coal seam | 0.67 | 0.50 | 1.3 | 28 | 0.54 | Fine sandstone | 1.04 | 1.14 | 3.3 | 33 | 0.82 | Coarse sandstone | 1.54 | 1.68 | 3.3 | 35 | 0.40 | Mudstone | 2.04 | 2.15 | 1.6 | 37.4 | 0.41 |
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