Research Article
The Study of Key Stratum Location and Characteristics on the Mining of Extremely Thick Coal Seam under Goaf
Table 2
Rock formation columnar section of #13 coal seam in Xiegou coal mine.
| No. | Name | Thickness (m) | Elasticity modulus (GPa) |
| 1 | Loess | 26.84 | 0.25 | 2 | Packsand | 7.95 | 4.03 | 3 | Sandy mudstone | 12.18 | 5.44 | 4 | Packsand | 8.50 | 13.25 | 5 | Sandy mudstone | 20.30 | 10.63 | 6 | Medium sandstone | 12.06 | 33.37 | 7 | Sandy mudstone | 31.49 | 6.22 | 8 | Packsand | 4.60 | 12.58 | 9 | Sandy mudstone | 21.85 | 6.45 | 10 | Mudstone | 25.22 | 3.61 | 11 | Sandy mudstone | 3.60 | 9.75 | 12 | Medium sandstone | 17.30 | 15.37 | 13 | Sandy mudstone | 6.50 | 8.53 | 14 | Packsand | 13.76 | 17.74 | 15 | Mudstone | 6.56 | 5.47 | 16 | Packsand | 3.82 | 8.36 | 17 | Mudstone | 4.52 | 2.60 | 18 | Medium sandstone | 7.84 | 12.79 | 19 | Sandy mudstone | 4.12 | 7.53 | 20 | Packsand | 7.02 | 6.43 | 21 | Sandy mudstone | 9.51 | 9.59 | 22 | Medium sandstone | 11.92 | 26.32 | 23 | Mudstone | 15.02 | 4.51 | 24 | #6 coal mine | 1.50 | 0.99 | 25 | Gritstone | 9.65 | 24.32 | 26 | Siltstone | 3.71 | 9.10 | 27 | Sandy mudstone | 1.00 | 8.57 | 28 | #8 coal mine | 5.69 | 2.15 | 29 | Mudstone | 2.13 | 3.64 | 30 | Medium sandstone | 8.31 | 28.45 | 31 | Marlstone | 2.12 | 17.56 | 32 | Mudstone | 2.01 | 6.52 | 33 | #9 coal mine | 0.51 | 0.55 | 34 | Sandy mudstone | 2.43 | 10.29 | 35 | Mudstone | 1.45 | 2.58 | 36 | Gritstone | 5.39 | 19.57 | 37 | Mudstone | 2.32 | 3.85 | 38 | #10 coal mine | 0.60 | 0.66 | 39 | Mudstone | 2.26 | 4.68 | 40 | Marlstone | 6.50 | 15.68 | 41 | Sandy mudstone | 1.53 | 9.74 | 42 | #11 coal mine | 0.61 | 1.02 | 43 | Mudstone | 1.76 | 2.85 | 44 | Limestone | 2.56 | 6.37 | 45 | Sandy mudstone | 2.08 | 10.24 | 46 | Mudstone | 1.49 | 4.39 | 47 | #12 coal mine | 0.82 | 1.20 | 48 | Mudstone | 1.00 | 3.80 | 49 | Medium sandstone | 2.50 | 17.68 | 50 | Micropsammite | 2.02 | 3.51 | 51 | Mudstone | 2.07 | 2.67 | 52 | Sandy mudstone | 1.50 | 10.85 | 53 | #13 coal mine | 5.25 | 1.36 | 54 | Dirt band | 0.25 | 2.23 | 55 | #13 coal mine | 3.25 | 1.25 | 56 | Dirt band | 0.25 | 2.64 | 57 | #13 coal mine | 4.15 | 1.48 | 58 | Dirt band | 0.30 | 2.47 | 59 | #13 coal mine | 1.55 | 1.12 | 60 | Mudstone | 2.00 | 3.62 | 61 | #14 coal mine | 0.33 | 0.85 | 62 | Mudstone | 3.05 | 2.48 | 63 | Sandy mudstone | 2.00 | 8.62 | 64 | Limestone | 1.29 | 6.34 | 65 | Mudstone | 1.00 | 4.58 | 66 | #15 coal mine | 0.44 | 0.63 | 67 | Sandy mudstone | 3.00 | 7.25 | 68 | Mudstone | 2.05 | 4.26 | 69 | Siltstone | 2.56 | 13.48 | 70 | Packsand | 2.41 | 7.68 |
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