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| Experimental study on formation law of natural oxidation gas in 3-5 coal of Tashan Mine |
| Fan Senshan |
| Tashan Mine , China Coal Datong Energy Co., Ltd., Datong 037000, China |
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Abstract Tashan Mine of China Coal is a top coal caving mining in close distance coal seam group. There are problems of air leakage in goaf and harmful gas emission from coal spontaneous combustion. In order to strengthen the prediction and prediction of coal spontaneous combustion and prevent coal spontaneous combustion in goaf, the gas generation law of 3-5 coal spontaneous combustion and oxidation process was studied experimentally. The research shows that the gas production of CO and CO2 increases exponentially with the increase of coal sample temperature, and the critical temperature of CO production is 49℃. In the slow oxidation stage, the coal temperature is 231℃. With the increase of coal temperature, the gas production of each hydrocarbon decreases with the increase of C atom number, and the gas production of alkanes > olefins > alkynes; at the same temperature, the gas production of each main gas product decreases with the decrease of oxygen supply.
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