同一煤层煤样不同温度下煤自燃规律研究

Study on Spontaneous Combustion of Coal at Different Temperatures in Same Coal Seam

为了研究低温氧化过程中煤自燃氧化规律,通过实验的方法对2个煤样分别进行温升处理,并进行红外光谱分析。结果表明:煤样在低温氧化过程中结构的变化规律即随着温度的升高,CH_3、CH_2桥键断裂,产生更多的CO、CO_2、H_2等气体,煤体内部活泼性较强的含氧官能团不断增加,吸附氧的能力变大,煤的自燃倾向性也增大。因此通过煤炭中-CH_3、-CH_2和部分含氧官能团含量分析煤的自燃氧化程度,降低煤炭自燃危险性。

In order to study the oxidation law of coal spontaneous combustion in the process of low temperature oxidation, two coal samples were experimented by temperature rising and infrared spectrum analysis. The results show that the variation of coal structure in low temperature oxidation process is that with the increase of temperature,CH3, CH2 bridge bond ruptured,resulting in more CO, CO2 and H2, then the active strong oxygen functional groups of coal increased, the adsorption capacity of oxygen increases, and the natural tendency of coal increases. Therefore ,the degree of spontaneous combustion oxidation of coal is analyzed by the content of -CH3,-CH2 and some oxygen functional groups in coal to reduce the risk of spontaneous combustion of coal.