Abstract: In deep mining environment, high mining-induced stresses cause the gradual compaction and deformation of roadways, leading to the formation of numerous air leakage pathways.This is particularly true when narrow coal pillars are used for support; the pressure within these pillars can create extensive fractures that may connect with adjacent mined-out areas, complicating the air leakage patterns at the working face.To delve deeper into this phenomenon, we focuse on the 204 mining face of Zhengtong Coal Industry, employing PFC^3D software for numerical simulation.Simulation results indicate that a significant number of fractures exist within an 80-meter range ahead of the narrow coal pillar during the mining operations of the 204 working face, posing a potential risk for forming air leakage channels.Based on these findings, the study has designed a pressure monitoring scheme, aiming to further clarify the characteristics of air leakage at deep mining faces under narrow coal pillar support conditions by measuring changes in pressure during actual ventilation processes.