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Abstract Based on the long cutthrough, high accuracy and poor construction condition, gyro theodolite orientation, DEM trigonometric leveling replacing fourth-order leveling and All station tripod method, the practice showed that maximum error of main cutthrough roadway x axis in 3107 working face, less than ±178 mm, the maximum vertical error 105 mm, less than 121 mm, the general accuracy met the needs of production.
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