Abstract:
A thorough understanding of the dynamic interaction and synergistic evolution mechanisms of stress, seepage, temperature, and chemical fields under mining disturbances is of great significance for ensuring the safe and efficient extraction of coal resources, which serve as the "ballast" of the national economy. This paper reviews the current research status of multi-field coupling evolution mechanisms, experimental techniques, and numerical simulation methods in mining activities, and proposes suggestions for future research priorities. First, the multi-field coupling mechanisms, including hydro-mechanical, thermo-hydro-mechanical, and thermo-hydro-mechanical-chemical, are systematically analyzed, and nonlinear cross-scale constitutive models based on statistical damage and fractal theories are summarized. Second, the experimental technology system is detailed, ranging from true triaxial multi-field synergistic loading and real-time meso-scale damage observations to engineering-scale solid-gas/solid-liquid similarity simulations. Finally, the numerical solution strategies for multi-field coupling and the pros and cons of mainstream simulation platforms in handling discontinuous large-deformation problems are compared and evaluated. Through a systematic review of existing research, it is pointed out that damage evolution mechanisms under complex stress paths, cross-scale cascade effects, and multi-field interaction mechanisms in deep high-temperature environments still require further clarification. Furthermore, identifying the set of key coupling factors in deep strata, breaking through in-situ precise detection technologies, and deepening the integration of artificial intelligence with multi-field coupling physical models are expected to provide more efficient and intelligent solutions for the smart mining of deep coal resources and intelligent disaster early warning.