A review of the evolution mechanism and experimental device of coal and gas outbursts

Laboratory coal and gas outbursts (CGOs) simulation experiments are the most intuitive means to study coal mine outburst accidents. This paper analyzes the research progress of outburst simulation experiments from the aspects of the influencing factors of CGOs simulation experiments and the development history of outburst experimental devices. First, the research progress on the influencing factors of outburst simulation experiments was reviewed, and then the quantitative relationship between multiple factors such as gas pressure, in situ stress, and the physical and mechanical properties of coal and outburst was analyzed. Second, based on the similarity theory, the development process of the outburst experimental device and the research progress on the features of similar outburst materials were emphasized. Finally, summarizes the problems in the simulation experiment research of CGOs. The research results provide an important theoretical basis for the development of a multi-functional and practical simulation experimental device that is close to the actual situation on site.