Research Article
Mechanism and Evolution Control of Wide Coal Pillar Bursts in Multithick Key Strata
Table 3
Discrimination of broken features of key strata.
| | Key strata | SKS1 (fine sandstone) | SKS2 (coarse sandstone) | SKS3 (siltstone) |
| | Overhanging width (m) | 288 | 264 | 171 | | Weighting step (m) | 29 | 58 | 190 | | Overhanging area (m2) | 8352 | 15312 | 32490 | | Broken features | Perpendicular “O-X” | Perpendicular “O-X” | Parallel “O-X” | | Near-field key strata | Near-field key strata | Far-field key strata |
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