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===Surface Borehole === | ===Surface Borehole === | ||
Surface Borehole are a connection between the surface and the minig area by a vertikal borehole. | Surface Borehole are a connection between the surface and the minig area by a vertikal borehole. | ||
| + | == Boreholes for degassing with more than 25 % CH4 == | ||
| + | This typ of boreholes are often used in gassy mines to extract the gas from the roof of the layer. The extracted gas contains | ||
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| + | == Ventilation Borehole == | ||
| + | Ventilation boreholes are a part of ventilation system of the mine. | ||
Version vom 20. Februar 2012, 17:02 Uhr
Surface Borehole
Surface Borehole are a connection between the surface and the minig area by a vertikal borehole.
Boreholes for degassing with more than 25 % CH4
This typ of boreholes are often used in gassy mines to extract the gas from the roof of the layer. The extracted gas contains
Ventilation Borehole
Ventilation boreholes are a part of ventilation system of the mine.
