Research Article
Rock Burst Mechanism under Coupling Action of Working Face Square and Regional Tectonic Stress
Table 2
Thickness of coal and rock strata.
| Number | Lithology | Thickness (m) | Accumulated thickness of roof (m) |
| 1 | Medium sandstone | 4.2 | 93.7 | 2 | Siltstone | 6.9 | 89.5 | 3 | Medium sandstone | 3.7 | 82.6 | 4 | Siltstone | 3.1 | 78.9 | 5 | Mudstone | 6.5 | 75.8 | 6 | Medium sandstone | 11.3 | 69.3 | 7 | Siltstone | 7.4 | 58 | 8 | Mudstone | 8.2 | 50.6 | 9 | Siltstone | 5.3 | 42.4 | 10 | Medium sandstone | 9.5 | 37.1 | 11 | Sandstone | 4.9 | 27.6 | 12 | Mudstone | 4.2 | 22.7 | 13 | Medium sandstone | 1.6 | 18.5 | 14 | Siltstone | 8.9 | 16.9 | 15 | Fine sandstone | 5.5 | 8 | 16 | Siltstone | 2.5 | 2.5 | 17 | Coal | 6.5 | — | 18 | Siltstone | 3.6 | — | 19 | Fine sandstone | 19 | — |
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