Research Article
Movement Law and Discriminant Method of Key Strata Breakage Based on Microseismic Monitoring
Table 2
Identification of the KS in working face 11203.
| Number | Thickness (m) | Depth (m) | Name | Hard rock | KS |
| 38 | 7.00 | 7.00 | Silty-fine sand | | | 37 | 28.72 | 35.72 | Fine-silty sand | | | 36 | 13.69 | 49.41 | Sandy loam | | | 35 | 15.24 | 64.65 | Medium-grained feldspar sandstone | Yes | Main KS (composite KS, combined two hard rock strata) | 34 | 5.50 | 70.15 | Mudstone | | | 33 | 26.67 | 96.82 | Fine feldspar sandstone | Yes | | 32 | 6.87 | 103.69 | Sandstone | | | 31 | 14.87 | 118.56 | Siltstone | | | 30 | 8.49 | 127.05 | Silty mudstone | | | 29 | 7.89 | 134.94 | Fine feldspar sandstone | | | 28 | 6.43 | 141.37 | Mudstone | | | 27 | 29.67 | 171.04 | Fine feldspar sandstone | Yes | Inferior KS 4 | 26 | 9.54 | 180.58 | Siltstone | | | 25 | 10.87 | 191.45 | Mudstone | | | 24 | 6.77 | 198.22 | Fine feldspar sandstone | | | 23 | 3.99 | 202.21 | Mudstone | | | 22 | 3.33 | 205.54 | Fine feldspar sandstone | | | 21 | 3.30 | 208.84 | Mudstone | | | 20 | 6.89 | 215.73 | Fine feldspar sandstone | | | 19 | 7.29 | 223.02 | Silty mudstone | | | 18 | 3.44 | 226.46 | Mudstone | | | 17 | 8.90 | 235.36 | Silty mudstone | | | 16 | 9.49 | 244.85 | Fine feldspar sandstone | Yes | Inferior KS 3 (composite KS, combined two hard rock strata) | 15 | 6.68 | 251.53 | Silty mudstone | | | 14 | 9.39 | 260.92 | Pelitic siltstone | | | 13 | 10.05 | 270.97 | Fine feldspar sandstone | Yes | | 12 | 5.30 | 276.27 | Mudstone | | | 11 | 7.63 | 283.90 | Silty mudstone | | | 10 | 11.29 | 295.19 | Mudstone | | | 9 | 11.53 | 306.72 | Medium-grained feldspar sandstone | Yes | Inferior KS 2 | 8 | 11.80 | 318.52 | Silty mudstone | | | 7 | 6.20 | 324.72 | Coarse feldspar sandstone | | | 6 | 3.99 | 328.71 | Silty mudstone | | | 5 | 1.64 | 330.35 | Fine feldspar sandstone | | | 4 | 7.17 | 337.52 | Silty mudstone | | | 3 | 7.51 | 345.03 | Fine feldspar sandstone | Yes | Inferior KS 1 | 2 | 3.99 | 349.02 | Silty mudstone | | | 1 | 2.95 | 351.97 | Coal stratum 2# | | |
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