Method for determining tunnel water inflow in fractured aquifer considering multiple factors

The present invention provides a method for determining the tunnel water inflow in a fractured aquifer considering multiple factors. The method comprises: determining soil layer division information and groundwater distribution, and obtaining physical and mechanical parameters of the soil layer; obtaining the tunnel length, the tunnel radius, the tunnel center buried depth information, the pumpingwell and the corresponding observation well information; establishing a three-dimensional finite difference model, and inverting the permeability coefficients kx, ky, kz and the water storage rate Ssin the x, y, z directions of the soil along the tunnel; determining a control equation and initial boundary conditions at a point in the tunnel; determining the dimensionless water level deepening SD(tD); determining the tunnel water inflow Q(t) in the fractured aquifer considering multiple factors; and combining the tunnel water inflow Q(t), taking the time t as the horizontal axis and the waterinflow Q(t) as the vertica