Research Article
Research on Permeability Enhancement Model of Pressure Relief Roadway for Deep Coal Roadway Strip
Table 1
The permeability enhancement effect of coal seams with different
.
| Distance from the center of the roadway /m | Significant permeability enhancement zone /m | General permeability enhancement zone /m | Gas permeability increase multiple |
| 7 | 4.3 | 12.1 | 11.1~239.3 | 9 | 3.5 | 15.4 | 6.7~89.2 | 12 | 1.2 | 20.5 | 3.6~37.1 | 15 | 0.3 | 20.7 | 2.4~9.1 | 18 | 0 | 20.5 | 1.2~5.5 | 21 | 0 | 20.4 | 0.8~1.6 |
|
|