Generation and Extraction of CMM in general
CMM is generated during extration of coal. The methane is a product from the coalification of the biological material started 300 million years ago. A part of this methane is still connected to the coal layers and the surrounding. This methane is a risk for mining, because of possible explosive gas-air-mitures. For safe mining it is necessary to capture the methane.
Extraction methods
Active Mines
Extraction methods
- pre degassing
- Boreholes underground
- Boreholes from surface
Abandonend Mines
Possibilities for the CMM-extraction of abandoned coal mines
- Using of historcal boreholes
- Drilling of new borehols
- Use of existing infrastructure
