Abstract: In order to solve the problems of high stress, support failure in deep large section coal roadway, bolt-net-cable space time coupling support is researched by numerical simulation method and engineering application. Based on the engineering background of 1306 haulage gate in Dongtan Coal Mine, first, through field mine pressure monitoring, we found that poor coupling effect of the support structure and the surrounding rock in strength, stiffness, and structural aspects was the main cause of support failure. Then, combined with the supporting failure mechanism, the bolt-net-cable coupling support method including timely support and lagging support were proposed. Timely support is set as low strength flexible support by bolt and lagging support is set as high strength rigid support by rope. Through numerical simulation, the lagging support distance is 30 meters. Last, field application results show that bolt-net-cable coupling support can not only effectively improve the support quality, but also control the surrounding rock deformation in the allowable range and ensure the stability of roadway surrounding rock.