In order to reduce the accumulation of gas, ease the difficulty of coal mining and improve the storage rate of coal resources, the "Y" type ventilation method was adopted, and the 3405 working face track roadway was taken as the research object, and the anchor + anchor network cable + joint support method of I-beam steel scaffolding was used to carry out the roadway along gob-side entry, and the concrete pouring equipment and key technologies for the roadway along the goaf were designed. The application results showed that the effect of retaining roadway was significant, the pouring process was simple, the risk of gas accumulation was eliminated, and the intended purpose was achieved.