Abstract：Aiming to investigate the seepage-mechanics coupling characteristics of coal under complex stress conditions and their impact on coal mine engineering safety, and providing theoretical and experimental support for key issues such as gas disaster prevention, efficient coalbed methane development, and surrounding rock stability control, a high-precision triaxial fluid-solid coupling test system was independently developed based on advanced image measurement technology, By integrating multi-physical field sensing modules and a real-time data acquisition system, this system enables synchronous monitoring and analysis of the dynamic mechanical responses and seepage characteristics of coal samples under coupled axial pressure, confining pressure, and seepage loading. The research first elaborates on the core components and working principles of the system, including the triaxial loading device, seepage pressure control system, digital image acquisition unit, and data processing algorithms. Subsequently, through coal failure tests designed under different stress paths and seepage conditions, combined with the non-contact strain measurement and full-field deformation visualization capabilities of image measurement technology, the study reveals the synergistic evolution laws and disaster mechanisms of coal deformation and seepage. The experimental results demonstrate that the system can accurately capture the changes in seepage-mechanics parameters during the entire process of coal fracture initiation, propagation, and penetration, quantitatively characterizing key indicators such as effective stress coefficients and dynamic permeability evolution. This provides an experimental basis for establishing a more comprehensive fluid-solid coupling theoretical model. Furthermore, the intelligent analysis method based on image measurement technology significantly improves data acquisition efficiency and reliability, overcoming the limitations of traditional point-based measurements. This study not only provides an important technical approach for the safe mining of deep coal resources and the optimization of gas extraction but also offers a referential methodology for research on fluid-solid coupling issues in similar underground engineering projects.
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2025, Vol. 44 
