Review on the Progress of Isolation-Suppression Materials (Technologies) of Gas Explosions in Coal Mines

Gas explosions bring severe hazards and threats to coal mine safety. To prevent such explosions and mitigate their consequences, research on the mechanism of gas explosions and isolation-suppression technology has been conducted using theoretical analyses, experimental studies, and numerical simulation methods, etc., and various isolation-suppression explosion materials (technologies) have been developed. The mechanisms of gas explosions and their isolation-suppression explosion are summarized in this paper, and the current research status of isolation-suppression materials (technologies) of gas explosions is reviewed from the perspectives of gas-phase, liquid-phase, and solid-phase isolation-suppression explosion, wall materials, and multi-phase synergistic isolation-suppression explosion. The results indicate that current studies on gas explosion mechanisms, isolation-suppression explosion mechanisms, and related technologies have been extensively conducted, resulting in significant achievements, some of which have already been integrated into the theoretical framework and technological applications of isolation-suppression explosion of gas explosions. However, due to the specific nature of gas explosions and variations in explosion environments, the effectiveness of existing isolation-suppression measures has not yet reached the desired level, particularly in the case of single-phase isolation-suppression explosion materials (technologies). Although multi-phase synergistic isolation-suppression explosion materials (technologies) have shown significant advantages, their effectiveness is not only influenced by various factors in single-phase materials (technologies), but is also constrained by the synergistic effects among different factors. Therefore, it is necessary to further investigate the optimal synergistic relationship among multiple factors. This review is expected to provide valuable references for promoting the development of isolation-suppression explosion materials (technologies) for gas explosions and their disaster prevention in confined spaces.