Fig 1.
Distribution of stress state of rock.
Fig 2.
Neural network model training flow chart.
Fig 3.
Flow chart of stability classification module of surrounding rock.
Fig 4.
Curve of vault subsidence and change of subsidence rate.
Fig 5.
Curve of convergence and convergence rate of AB side of portal.
Fig 6.
Curve of convergence and convergence rate of CD side of portal.