Abstract: In view of the problem of well wall water seepage in the main inclined shaft of Daijiatian Coal Mine,the Bernoulli equation is used to accurately calculate a pressure head of 0.75 MPa.The water seepage characteristics of the main inclined shaft are analyzed,and the maximum water inflow is located at the K0+326 m mileage,with an observed water inflow of up to 1900 m3/h;The maximum principal strain and displacement characteristics of the roadway surrounding rock are obtained using numerical simulation,and a support method for improving the stability of wellbore surrounding rock is proposed by using the grouting technology of high-pressure grouting to block the supply water source and embed seamless steel pipes;Adopting high-pressure grouting technology combined with embedded seamless steel pipe technology,effectively blocking the supply water source and enhancing the stability of the wellbore surrounding rock;Through numerical simulation analysis,clarify the grouting sequence and optimize the support strategy.The engineering practice proves that the water seepage in the wellbore is significantly reduced,and the strain and displacement of the surrounding rock are effectively controlled,the application of wellbore grouting technology governs the water seepage phenomenon in the wellbore,ensures the safety of the wellbore and provides a certain reference value for the application of similar well wall water seepage mines.