Quality of CMM: Unterschied zwischen den Versionen
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==CMM Ressources== | ==CMM Ressources== | ||
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| − | ―――― Ventilation ―――――Ventilation shaft 0,1 – 1,0 % CH4 | + | ―――― Ventilation ―――――Ventilation shaft |
| + | | during mining 0,1 – 1,0 % CH4 | ||
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| − | + | ―――― Active Mines ―――――Ventilation shaft | |
| − | ―――― Active Mines ―――――Ventilation shaft 0,1 – 1,0 % CH4 | + | | during mining 0,1 – 1,0 % CH4 |
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| ―――――Underground gas extracting system | | ―――――Underground gas extracting system | ||
| Zeile 19: | Zeile 20: | ||
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| ―――――Surface boreholes | | ―――――Surface boreholes | ||
| − | | Pre | + | | Pre & during & post mining 25 % to 95 % CH4 |
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| ―――――surface boreholes | | ―――――surface boreholes | ||
| Zeile 26: | Zeile 27: | ||
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| − | ―――― Abandoned Mines | + | ―――― Abandoned Mines ―――old shaft (Ventilation) shaft 25 %– 85 % CH4 |
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| ――――Surface boreholes into mining gallery 25 %– 85 % CH4 | | ――――Surface boreholes into mining gallery 25 %– 85 % CH4 | ||
Version vom 20. Februar 2012, 15:51 Uhr
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
| ―――― 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
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"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. |
