In order to prevent water inrush accident in fault fracture zone during stoping of 15102 working face, through analyzing the water inrush mechanism and the specific conditions of the working face of fault broken zone, it was decided to adopt the grouting reconstruction scheme of the bottom plate and carry out the specific design of the grouting reconstruction scheme. According to the monitoring results after the floor grouting, the maximum hydraulic pressure in the fracture zone of the working face was 194 kPa during the mining of the working face.