The spontaneous combustion
of underground minerals causes huge
property losses and ecological damage. Coal and oil shale are co-associated
minerals in the Fushun West Mine, and both have the ability to undergo
oxidative spontaneous combustion. To study the effect of microstructure
changes on the macroscopic gas product concentration during the mineral
oxidation spontaneous combustion process in the Fushun West Mine,
this study used a high-temperature temperature-programmed test to
obtain the change trend of gas product concentration in different
oxidation stages of minerals. Using Fourier transform infrared spectroscopy
technology, the changes in active functional groups of surface molecules
during the process of mineral oxidation and spontaneous combustion
were identified. Finally, using the gray correlation degree, correlation
analysis between the concentration of gas products and the concentration
of active functional groups in different oxidation stages was carried
out. The key reactive functional groups affecting mineral spontaneous
combustion were identified. The essential reason for the change in
the gas product was revealed.