Study On The Spontaneous Combustion Oxidation Laws Of Jurassic Coal In Western Inner Mongolia

Jurassic coal reserves are rich in northwestern China, where coal quality is good,metamorphic degree is low, bituminous coal is the most, while coal spontaneouscombustion is more serious. With the increasing amount of Jurassic coal mining, theJurassic coal spontaneous combustion disasters have become increasingly prominent,which in return seriously threatens the normal mining of Jurassic coal seam. Thethesis takes Jurassic coal in western Inner Mongolia as the research object, themacroscopic and microscopic parameters of spontaneous combustion of Jurassic coalin western Inner Mongolia were measured experimentally, and based on coal oxygencomplex theory, spontaneous combustion process of Jurassic coal in western InnerMongolia were analyzed, finally the spontaneous combustion oxidation characteristicswere determined. The results complement and improve the experimental parametersspontaneous combustion mechanism of Jurassic coal in western Inner Mongolia, alsoprovide a reference for the prediction, prevention and control work of spontaneouscombustion of Jurassic coal seam.The quality of Jurassic coal composition in western Inner Mongolia, spontaneouscombustion tendency and the generation law of sign gases at low-temperatureoxidation stage were respectively measured in laboratory through coal industryanalyzer, static oxygen absorption quantity and temperature programmed generationexperiment of sign gases, and compared to the measurement results of coal sample inother coal forming period, the spontaneous combustion characteristics of Jurassic coalin western Inner Mongolia were analyzed from the macroscopic aspects.Through Fourier infrared spectroscopy scanning experiment, the functionalgroups of Jurassic coal in western Inner Mongolia at different oxidation temperatureof low temperature oxidation stage was measured in laboratory, and the changing lawof hydroxyl group, oxygen functional groups, aliphatic hydrocarbons and arene fourmain functional groups of Jurassic coal in western Inner Mongolia was analyzed inthe low temperature oxidation process, then the spontaneous combustioncharacteristics of Jurassic coal in western Inner Mongolia were analyzed from themicroscopic aspect.The absorption and heat release of Jurassic coal spontaneous combustion processin western Inner Mongolia were measured by differential scanning calorimetry (DSC)experiment. The DSC curve of Jurassic coal in western Inner Mongolia was dividedinto three typical stages according to the heat absorption and heat release of coal sample; the DSC curves at different heating rates were analyzed, and eventually theheat absorbing and heat releasing laws of Jurassic coal in western Inner Mongolia atdifferent heating rates were analyzed and the dynamics analysis of Jurassic coalsamples in western Inner Mongolia was made, at last, the apparent activation energyof Jurassic coal in western Inner Mongolia in the low temperature oxidation processwas calculated based on the Kissinger method.