Quality of CMM

Definition and Origin

"Coalbed methane (CBM) is methane contained in coal seams, and is often referred to as virgin coalbed methane, or coal seam gas." (EPA Climate Change Glossary of climate change terms) It refers to the methane gas found in coal deposits.

Coal Mine Methane (CMM) is the subset of CBM that is released from the coal seams during the process of coal mining. The CMM described and discussed in this Wiki is an anthropogenic emission.

CMM Ressources

Spaltenbreite 150 Pixel	Spaltenbreite 400 Pixel	Spaltenbreite 100 Pixel	Spaltenbreite 100 Pixel
Active Mine	Underground extracting System	during mining	25 % - 65 %
Zelle A2	Zelle B2	Zelle B2	Zelle B2
Zelle A3	Zelle B3	Zelle B3	Zelle B3

 |
 |――――― Ventilation  ―――――Ventilation shaft 
 |                        during mining 0,1 – 1,0 % CH4   
 |
 |
 |
 |―――― Active Mines  ――――――Ventilation shaft 
 |                   |     during mining 0,1 – 1,0 % CH4  
 |                   |
 |                   |―――――Underground gas extracting system 
 |                   |     during mining   25 % to 65 % CH4
 |                   |
 |                   |―――――Surface boreholes 
 |                   |     Pre & during & post mining   25 % to 95 % CH4
 |                   |
 |                   |―――――surface boreholes 
 |                         during mining   < 4 % CH4
 |
 |
 |
 |―――― Abandoned Mines ―――old shaft (Ventilation) shaft 25 %– 85 % CH4
                      |
                      |―――Surface boreholes into mining gallery 25 %– 85 % CH4

"Coalbed methane (CBM) is methane contained in coal seams, and is often referred to as virgin coalbed methane, or coal seam gas." (EPA Climate Change Glossary of climate change terms) It refers to the methane gas found in coal deposits. Coal Mine Methane (CMM) is the subset of CBM that is released from the coal seams during the process of coal mining. The CMM described and discussed in this Wiki is an anthropogenic emission.