Research Article
Ground Stress Distribution and Dynamic Pressure Development of Shallow Buried Coal Seam Underlying Adjacent Room Gobs
Table 1
Mechanical parameters of the coal seam 2−2-3−1 in the Huoluowan Coal Mine.
| | Rock strata | Property | Thickness (m) | Volume force (kN/m3) | Tensile strength (MPa) | Shear modulus (GPa) | Bulk modulus (GPa) |
| | Fine sandstone | Key rock strata | 20.26 | 23.53 | 1.95 | 3.97 | 6.02 | | Sandy mudstone | — | 1.51 | 23.3 | 2.18 | 4.21 | 6.12 | | Coal seam 2−2 | — | 5.36 | 14.7 | 0.82 | 0.67 | 1.60 | | Mudstone | — | 4.21 | 23.8 | 1.58 | 2.73 | 4.35 | | Sandy mudstone | — | 2.09 | 23.3 | 2.18 | 4.21 | 6.12 | | Fine sandstone | — | 2.54 | 23.53 | 1.95 | 3.97 | 6.02 | | Sandy mudstone | — | 4.7 | 23.3 | 2.18 | 4.21 | 6.12 | | Fine sandstone | Second key rock strata | 11.71 | 23.53 | 1.95 | 3.97 | 6.02 | | Siltstone | — | 7.86 | 22.09 | 4.24 | 3.46 | 5.26 | | Sandy mudstone | — | 1.88 | 23.3 | 2.18 | 4.21 | 6.12 | | Coal seam 3−1 | — | 4.16 | 14.7 | 0.82 | 0.67 | 1.60 | | Mudstone | — | 1.94 | 23.8 | 2.18 | 2.73 | 4.35 |
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