Progress on Multi-Field Coupling Simulation Methods in Deep Strata Rock Breaking Analysis

The utilization of multi-field coupling simulation methods has become a pivotal approach for the investigation of intricate fracture behavior and interaction mechanisms of rock masses in deep strata. The high temperatures, pressures and complex geological environments of deep strata frequently result in the coupling of multiple physical fields, including mechanical, thermal and hydraulic fields, during the fracturing of rocks. This review initially presents an overview of the coupling mechanisms of these physical fields, thereby elucidating the interaction processes of mechanical, thermal, and hydraulic fields within rock masses. Secondly, an in-depth analysis of multi-field coupling is conducted from both spatial and temporal perspectives, with the introduction of simulation methods for a range of scales. It emphasizes cross-scale coupling methodologies for the transfer of rock properties and physical field data, including homogenization techniques, nested coupling strategies and data-driven approaches. To address the discontinuous characteristics of the rock fracture process, the review provides a detailed explanation of continuous-discontinuous coupling methods, to elucidate the evolution of rock fracturing and deformation more comprehensively. In conclusion, the review presents a summary of the principal points, challenges and future directions of multi-field coupling simulation research. It also puts forward the potential of integrating intelligent algorithms with multi-scale simulation techniques to enhance the accuracy and efficiency of multi-field coupling simulations. This offers novel insights into multi-field coupling simulation analysis in deep rock masses.