Water control method for sealing carbon dioxide in sandstone fracture aquifer

The invention discloses a water control method for sealing carbon dioxide in a sandstone fracture aquifer, and relates to the technical field of mine water disaster treatment. The method comprises the steps that firstly, supercritical carbon dioxide is injected into a grouting area, crack water is removed through the supercritical carbon dioxide, good conditions are created for slurry diffusion, and the slurry diffusion distance is increased; then mixing the supercritical carbon dioxide with the slurry for grouting, and increasing the flowability of the slurry in the pipeline by utilizing the good flowability of the supercritical carbon dioxide so as to prevent the pipeline from being blocked; and finally, supercritical carbon dioxide can react with water in quantity to generate carbonic acid and react with ions such as Ca < 2 + > and Mg < 2 + > in deep mine water and slurry to generate sediments such as CaCO3 and MgCO3, cracks in the sandstone rock stratum can be effectively blocked, scientific and direction