Abstract
<title>Abstract</title> <p>Coal gas and coal spontaneous combustion compound disasters severely restrict the safe production of coal mines. Residual coal in goafs generally undergoes dynamic gas adsorption and desorption, and is continuously subjected to overburden stress. Its spontaneous combustion behavior is jointly dominated by the coupling effect of stress and coal gas. Existing studies on coal spontaneous combustion mostly focus on single influencing factors, lacking systematic investigations into the synergistic effect of stress and adsorbed gas, which fails to reveal the compound disaster mechanism and results in insufficient theoretical support for the collaborative prevention and control of gas and spontaneous combustion in goafs. Therefore, this paper presents a literature review on the spontaneous combustion characteristics and internal influence mechanisms of fractured coal bearing gas under stress. The influences of stress, temperature and other factors on the macroscopic characteristics of coal spontaneous combustion are summarized, and the staged evolution characteristics are illustrated based on oxidation kinetics. From the microscopic perspectives of functional groups, free radicals and pore structures, the internal correlation between coal structural evolution and spontaneous combustion during heating is revealed. The synergistic evolution laws of gas desorption-seepage and coal spontaneous combustion are summarized by combining macroscopic and microscopic results. This study clarifies the intrinsic mechanism whereby stress and adsorbed gas jointly control coal spontaneous combustion and remedies the deficiencies of single-factor research. It can provide a theoretical basis for the early warning, collaborative prevention and control of compound disasters as well as the safe and efficient mining of deep coal mines.</p>