Carrying out water inrush prediction, particularly focusing on accurately predicting mine water inflow, is of paramount importance to prevent water inrush disasters. The analytical method, also known as the 'virtual large diameter well method,' is widely employed for predicting mine water inflow. Aiming at the contradiction between the evolution of hydrogeological parameters of mining roof and the dynamic and accurate calculation of mine water inflow, the formation mechanism of water inflow and the evolution law of hydrogeological parameters in the process of mining roof failure are described. The dynamic calculation method of mine water inflow under variable parameters is proposed, which takes into account the 'dynamic large diameter well' theoretical model of dynamic change process of goaf area and water table funnel. The first (periodic) caving step is used as the calculation unit to generalize the 'dynamic large diameter well' in turn, and the dynamic water inflow is gradually calculated during the mining activities. Finally, utilizing the NO.1306 mining panel of a mine as an example, the calculation results show that the dynamic calculation method of mine water inflow under conditions of single parameter (R0) and double parameter (R0 and S) change significantly improves calculation accuracy, The average relative error is reduced from 140.7 % with the traditional analytical method to 88.7 % and 10.3 % respectively. These research findings provide a methodological foundation for understanding interference flow field evolution during long-term mining processes and enable dynamic and precise mine water inflow calculations at various stages of mining activities. This can effectively guide mine water prevention and control efforts.

mining disturbance; evolution of hydrogeological parameters; mine water inflow; dynamic calculation; variable parameter calculation.