Abstract: Based on the engineering background of the large deformation at the intersection of the 525 trackway and the return air passage of the mining area of Bailiang Mine, a combination of drilling observation, numerical simulation, and industrial test methods was used to study the deformation and failure characteristics of the intersection point, the vertical stress distribution of the surrounding rock, and the distribution of the plastic zone, the scheme of the grouting reinforcement.The new two-component inorganic reinforcement material was used to grout the roof of the intersection point.The research results show that the maximum depth of roof destruction at the intersection point is 6.2 m, the roof destruction range is large, and the floor heave is obviously greater than the roof subsidence, the maximum subsidence of the roof is 0.5 m, and the maximum heave of the floor is 1.2 m.The intersection point is in a high stress environment, and the vertical stress concentration value is 15 MPa, which is 1.67 times the original rock stress.The plastic zone failure depth of the roof at the intersection point is 0.5 m, and the plastic zone failure depth of the floor is 1.5 m.The on-site grouting reinforcement results show that the diffusion effect of the grout is good, the grouting scheme is reasonable, and the grouting reinforcement method effectively suppresses the large deformation of the roof of the intersection point, ensuring the safety of the intersection point during the service period.