Abstract: In response to the problem of large deformation caused by the stress concentration at the intersection of the newly excavated coal exploration roadway and the air roadway in the goaf-retained working face when passing through the abnormal area. Theoretical analysis, numerical simulation and field practice are used to study the evolution law of bearing stress and the distribution pattern of plastic zone in the surrounding rock of the intersection of large cross-section roadway under L-shaped roof cutting and uncut schemes. The mechanism that the influence of roof cutting in newly excavated coal roadway on the retention effect of air roadway is revealed. The minimum cutting angle and height are calculated theoretically. The effect of three situations of not roof cutting, roof cutting at 15° and roof roof cutting at 30° in the coal roadway is simulated by using FLAC^3D. It is determined that under the scheme of roof cutting of the exploration coal road at 15° is the best scheme. After the roof cutting, the stress peak at the intersection is significantly reduced and the plastic zone range is reduced. The effect of protecting the air roadway in the abnormal area is achieved and it is conducive to the safe and efficient mining of the working face. Combined with the engineering geological conditions on site, the L-shaped roof cutting that long side 100 m + short side 6 m and pressure relief scheme and blasting parameters such as blasting charge specifications are determined. The reinforcement support scheme for the air duct in the influence area is designed and the prestress effect is verified by numerical simulation that deep and shallow anchored shells with a shallow pressure of 0.15 MPa and a deep pressure of 0.02 MPa are obtained. After the on-site construction, the control effect of the road is monitored in 60 d. The field feedback shows that the deformation of the roof and two sides is reduced and the surrounding rock of the roadway in the intersection area is cut well to protect the roadway.