23107 recovery mining face of Xiegou Mine is subject to frequent and large water showers, and the face must be evaluated for sudden water surge hazard. In combination with the results of numerical simulation of the recovery phase, the stress concentration degree in front of the working face and coal wall side was high, and the tensile and shear damages occurred in the face bottom plate and the rear mining space, resulting in water-conducting cracks, indicating that the face was at risk of sudden water penetration. The bottom plate grouting was used to modify the working face, and 16 drill sites and 96 holes were constructed. After the transformation, the practice showed that the deformation of the plastic zone of the bottom plate was improved, and the minimum gush of water in the inspection borehole was 0.20 m3/h, and the maximum was 5.83 m3/h, both were smaller than the on-site requirement of 10 m3/h, which showed that the grouting effect was good and ensured the smooth recovery of the working face.