In infrastructure projects such as water diversion tunnels, highway and railway tunnels, and water conservancy dams, adverse geological bodies such as fault zones and fracture zones may exist, posing risks of water inrush and mud inrush during construction. By constructing boreholes (including directional boreholes), pre-grouting is carried out in advance to stop water, reinforce surrounding rocks, and block faults and fractures in the target area, providing a good working environment for subsequent projects