Abstract: In view of the difficulty in controlling surrounding rock in high-stress roadway along gob, this paper proposes the technology of replacing coal pillar shotcrete along the empty roadway by gangue wall. The bagged gangue masonry wall is used as the bearing isolation wall along the roadway. The fiber concrete is sprayed on the surface of the bagged stone wall to improve the bearing capacity of the wall. The effects of the width of the gangue wall, the thickness of the sprayed layer and the amount of steel fiber on the vertical stress and deformation of the gangue wall were studied by numerical simulation. The results showed that the optimal wall width was 3.0 m. The optimum spray layer thickness was 70 mm. The optimum steel fiber content was 60 kg/m³. Through on-site observation, the maximum deformation of the roof of the roadway was 88 mm, which indicates that the shotcrete control technology for gangue wall replacing coal pillars along gob side can effectively control the roof rock formation.