Abstract:
With the onset of deep mining, the nonlinear behavior of coal and rock, large-scale high-energy disasters, and multi-physical field coupling phenomena intensify. Rock bursts and coal and gas outbursts mutually induce and stimulate each other, increasingly posing severe risks and hazards as typical dynamic disasters in coal mines. These have become a significant obstacle to the safe and efficient production of deep coal resources in China. The premise and foundation for preventing and controlling these typical dynamic disasters in coal mines is an in-depth study of their occurrence mechanisms. Therefore, it is necessary to grasp the overall progress in the research on the mechanisms of coal mine rock burst, coal and gas outburst, and coal-rock-gas composite dynamic disasters in China, as well as the main controlling factors and mechanisms of disaster formation. The existing research results of predecessors and research team are summarized, used CiteSpace software to review the literature, by analyzing keyword co-occurrence and burst knowledge maps, elucidated the research hotspots at each stage in the development of the field of typical dynamic disasters in coal mines and outlined future development trends. Clarified the differences in the impact of various geological factors on coal and gas outbursts and rock bursts; and "five-effect" mechanism of coal mine typical dynamic disaster formation was discussed. The analysis shows that research on the typical dynamic disaster areas around coal mines all starts from the perspective of their occurrence mechanisms and disaster-inducing factors, these disaster-inducing factors are primarily natural geological conditions, supplemented by mining technical conditions, different disaster-inducing environments lead to different manifestations of typical dynamic disasters. The breeding mechanism of typical dynamic disasters includes the intrinsic effects of the material, stress overloading effects, energy-driven effects, structural mutation effects, and time-variant effects of the coal and rock body, all of which interact and influence each other. Based on the current issues and key challenges faced in deep mining, research prospects have been proposed. These include the urgent need for in-depth studies on the full lifecycle formation characteristics, evolution patterns, and disaster mechanisms of typical dynamic disasters in coal mines. Additionally, there is a need for intelligent identification of precursor information and the integration of warning indicators under strong deep disturbances, as well as the establishment of a multi-hazard chain disaster prevention and control system. These efforts aim to effectively ensure the safe and efficient extraction of deep coal resources.