Research Article
Study on the Support System Mechanism of Entry Roof with Roof Cutting Pressure Releasing Gob-Side Entry Retaining Technology
Table 1
Basic parameters of 8304 and 8305 working face.
| | Coal seam thickness/average (m) | 1.80–3.55/3.1 | Depth (m) | 367–411 | | Mining height (m) | 3.1 | Coal seam dip/average (°) | 2∼6/4 | | Strike length (m) | 8304 face: 670 | Inclination length (m) | 8304 face: 127 | | 8305 face: 680 | 8305 face: 110 | | Immediate roof lithology/thickness (m) | Mudstone/1.44 | Immediate floor lithology/thickness (m) | Mudstone/3.2 | | Basic roof lithology/thickness (m) | Fine sandstone/3.88 | Basic floor lithology/thickness (m) | Siltstone/3.1 |
|
|
