Experimental study and mechanism analysis of coal spontaneous combustion inhibition based on oxidation characteristics of key coal reaction groups

Abstract

Based on the staged oxidation development process dominated by the temperature node of coal itself, the correlation contribution of the staged oxidation reaction of key active groups is thoroughly analyzed. The mathematical relationship between macroscopic gas characteristics and microscopic active groups of different coal samples was established. The exothermic mechanism of the self-reaction associated with the key active groups during the staged oxidation of coal was investigated using quantum chemical calculations. The performance of inhibitors is significantly diminished during the latent development stage of coal. The key temperature node accelerates the desorption of crystal water from the physical inhibitor, enabling it to act more effectively on the coal body. Meanwhile, the chemical antioxidant becomes more active in quenching and capturing key active groups, thereby inhibiting the chain reaction process and the release of heat from self-reactions. The critical temperature inhibition method ensures a more comprehensive suppression of coal oxidation at key stages. The research provides valuable insights and data support for enhancing the safety of coal storage and transportation.