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Abstract 3 breakthrough survey of Xiaoxi Mine was taken as study object, combined with production needs and geological conditions of the mine, the breakthrough plan was designed, horizontal error and elevation error were predicted, the closure difference of azimuth between the positions of the two breakthrough points was plus or minus 68 ", the horizontal coordinate closure difference was 0.047 m, and the elevation closure difference was 0.105 m, less than the error estimate, meeting the requirements of roadway penetration measurement, providing some reference for similar roadway penetration measurement.
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