Generation and Extraction of CMM in general

Aus Cometh-Wiki
Zur Navigation springen Zur Suche springen

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
Datei:Gas-drainage IfM.JPG
boreholes for degassing
Datei:Gob Gas Recovery Methods.JPG
boreholes for degassing

Abandonend Mines

Possibilities for the CMM-extraction of abandoned coal mines

  • Using of historcal boreholes
  • Drilling of new borehols
  • Use of existing infrastructure
Abgerufen von „https://websites.fraunhofer.de/Cometh-Wiki/index.php?title=Generation_and_Extraction_of_CMM_in_general&oldid=628“