Infrared Spectral Research On The Coal Oxidized Spontaneous Combustion Process

The thesis uses the Fourier infrared spectroscope to study the coal molecular structure, coal molecular chemical bond, functional group change rule in oxidized spontaneous combustion process under different temperature as well as the target gas. In order to reveal the coal spontaneous combustion mechanism.Selects 29 kinds of coal samples in different mine pits, different coal bed at Datong mining area carries on the experiment to analyze. The thesis through conducts the infrared spectrum research to the coal spontaneous combustion process, summarizes the predecessor's experience establishes the coal molecular structure model, uses the quantum chemistry computational method, optimized the coal molecular structure. The coal molecular functional group frequency obtains from the infrared spectrum experiment is basically consistent to the one obtains from the theoretical calculation, which proves that the established coal molecular structure is correct.And through the experiment, studies the relations between density and the temperature of coal spontaneous combustion target gas, uses the established components forecast model could well forecast the relevant components'density. It has a vital significance to the determination of the coal ignition temperature and the combustion serious degree, and to the spontaneous combustion fire forecast in the mine.