Research Article
The Spatio-Temporal Evolution of Overlying Rock Structure and Mine Pressure Behavior in a Short-Distance Coal Seam Face
Table 1
Mechanical parameter of coal and rock and ratio of physical similarity simulation experiment.
| Serial number | Lithology | Cumulative thickness/m | Single layer thickness/m | Bulk density/(kN·m-3) | Strength of extension/MPa | Elasticity modulus/MPa | 1 cm ingredients | Coal/kg | Sand/kg | Plaster/kg | Calcium carbonate/kg |
| 34 | Micropsa-mmite | 640.00 | 26.00 | 2.21 | 1.56 | 1.415 | 0 | 8.40 | 0.36 | 0.84 | 33 | Siltstone | 614.00 | 12.30 | 2.45 | 0.78 | 0.885 | 0 | 8.40 | 0.24 | 0.96 | 32 | Conglomerate | 601.70 | 52.10 | 2.64 | 3.02 | 0.345 | 0 | 8.40 | 0.50 | 0.72 | 31 | Medium sandstone | 549.60 | 52.80 | 2.31 | 1.12 | 1.214 | 0 | 8.40 | 0.48 | 0.72 | 30 | Sandstone | 496.80 | 22.02 | 2.35 | 0.88 | 0.925 | 0 | 8.40 | 0.50 | 0.72 | 29 | Medium sandstone | 474.78 | 28.73 | 2.31 | 1.12 | 1.214 | 0 | 8.40 | 0.48 | 0.72 | 28 | Sandy mudstone | 446.05 | 33.48 | 2.54 | 0.23 | 0.346 | 0 | 8.53 | 0.21 | 0.85 | 27 | Kern stone | 412.57 | 14.70 | 2.41 | 0.48 | 0.817 | 0 | 8.53 | 0.32 | 0.75 | 26 | Sandstone | 397.87 | 23.76 | 2.35 | 0.88 | 0.925 | 0 | 8.40 | 0.50 | 0.72 | 25 | Medium sandstone | 374.11 | 69.11 | 2.31 | 1.12 | 1.214 | 0 | 8.40 | 0.48 | 0.72 | 24 | Sandy mudstone | 305.00 | 16.20 | 2.54 | 0.23 | 0.346 | 0 | 8.53 | 0.21 | 0.85 | 23 | Medium sandstone | 288.80 | 5.00 | 2.31 | 1.12 | 1.214 | 0 | 8.40 | 0.48 | 0.72 | 22 | Sandstone | 283.80 | 17.80 | 2.35 | 0.88 | 0.925 | 0 | 8.40 | 0.50 | 0.72 | 21 | Kern stone | 266.00 | 14.60 | 2.41 | 0.48 | 0.817 | 0 | 8.53 | 0.32 | 0.75 | 20 | Sandy mudstone | 251.40 | 3.90 | 2.54 | 0.23 | 0.346 | 0 | 8.53 | 0.21 | 0.85 | 19 | Kern stone | 247.50 | 33.00 | 2.41 | 0.48 | 0.817 | 0 | 8.53 | 0.32 | 0.74 | 18 | Sandstone | 214.50 | 13.50 | 2.35 | 0.88 | 0.925 | 0 | 8.40 | 0.50 | 0.72 | 17 | Kern stone | 201.00 | 12.88 | 2.41 | 0.48 | 0.817 | 0 | 8.53 | 0.32 | 0.74 | 16 | Sandy mudstone | 188.12 | 27.18 | 2.54 | 0.23 | 0.346 | 0 | 8.53 | 0.21 | 0.85 | 15 | Kern stone | 160.94 | 12.90 | 2.41 | 0.48 | 0.817 | 0 | 8.53 | 0.32 | 0.75 | 14 | Sandy mudstone | 148.04 | 4.62 | 2.54 | 0.23 | 0.346 | 0 | 8.53 | 0.21 | 0.85 | 13 | Siltstone | 143.42 | 21.47 | 2.45 | 0.78 | 0.885 | 0 | 8.40 | 0.24 | 0.96 | 12 | Sandy mudstone | 121.95 | 23.03 | 2.54 | 0.23 | 0.346 | 0 | 8.53 | 0.21 | 0.85 | 11 | Siltstone | 98.92 | 7.36 | 2.45 | 0.78 | 0.885 | 0 | 8.40 | 0.24 | 0.96 | 10 | Mud rock | 91.56 | 8.74 | 2.62 | 0.95 | 1.321 | 0 | 8.53 | 0.21 | 0.85 | 9 | Siltstone | 82.82 | 11.02 | 2.45 | 0.78 | 0.885 | 0 | 8.40 | 0.24 | 0.96 | 8 | Sandstone | 71.80 | 9.07 | 2.35 | 0.88 | 0.925 | 0 | 8.40 | 0.50 | 0.72 | 7 | Mud rock | 62.73 | 7.07 | 2.62 | 0.95 | 1.321 | 0 | 8.53 | 0.21 | 0.85 | 6 | Sandstone | 55.66 | 12.16 | 2.35 | 0.88 | 0.925 | 0 | 8.40 | 0.50 | 0.72 | 5 | Siltstone | 43.50 | 7.24 | 2.45 | 0.78 | 0.885 | 0 | 8.40 | 0.24 | 0.96 | 4 | 3-2 coal | 36.26 | 4.50 | 1.35 | / | / | 4.15 | 4.15 | 0.21 | 0.42 | 3 | Siltstone | 31.76 | 7.21 | 2.45 | 0.78 | 0.885 | 0 | 8.40 | 0.24 | 0.96 | 2 | Sandstone | 24.55 | 14.55 | 2.35 | 0.88 | 0.925 | 0 | 8.40 | 0.50 | 0.72 | 1 | 4-2 coal | 10.00 | 10.00 | 1.45 | / | / | 4.15 | 4.15 | 0.21 | 0.42 |
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