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Abstract The 4302# air return roadway of Sanyuan Coal Industry was taken as the research object, the geological conditions and mechanical characteristics of the working face were analyzed, and the problem of anchor bolt safety support in coal mine roadway was obtained through theoretical calculation of the model. Related parameters of roadway bolt support were got. Simultaneously, the distribution of prestressing field under different row spacing was simulated using FLAC3D software, and a better row spacing of the anchor was obtained.
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