Abstract: For the situations that the working face of Daning Coal Mine passes through the fault and the fault connects the sandstone aquifer of roof and the working face is mudstone and carbonaceous mudstone, we strengthened the strength of the coal body in front of the working face and the surrounding rock in the broken roof zone by the new grouting reinforcement material, enhance its stability, carry out reasonable drilling layout and reinforcement scheme design. The results show that the stability of the coal wall of the strengthened working face is strengthened to reduce the occurrence of wall caving, roof fall and pushed down of supports, and to avoid the occurrence of mudstone floor heave of floor. The field application shows that the design of the grouting reinforcement scheme and the application of grouting materials can make the working face pass through the fault smoothly.