Geogrid positioning device for mine

The invention discloses a geogrid positioning device for a mine, and relates to the technical field of civil grids. The geogrid positioning device for the mine comprises a limiting frame, wherein thelimiting frame comprises a pressing plate and positioning columns; a plurality of positioning columns penetrate on the pressing plate; the bottom ends of the positioning columns are conical structures; blind holes are formed in the top ends of the positioning columns; barb notches communicating with the blind holes are uniformly formed in the circumferential sides of the bottoms of the positioningcolumns; barb columns are slidingly fitted in the blind holes; and polygonal openings are formed in the top ends of the barb columns. According to the invention, a set of insertion holes re excavatedon the slope of the mine, so that the positioning columns are inserted with the insertion holes, and then the barbs of the barb columns are used to penetrate through the barb notches to increase thefriction force with the inne