Magnetic orientation
Abstract
Orientation of mines is one of the most labor-intensive and responsible tasks of the surveying service. The performance of magnetic orientation does not require stopping the mine shaft either during the preparation period or at the time of production. Magnetic orientation has a number of important advantages (see article). The accuracy of magnetic orientation, as is known (at this stage of study of this issue), does not depend on the depth of the mine. In addition, all sources of errors (in determining azimuth) that accompany geometric orientation are eliminated. Practice in the performance of magnetic orientation here and abroad shows that if the work is carried out thoroughly and all required conditions are met, magnetic orientation guarantees an accuracy of 1'–2' and even higher. This is also evidenced by the results of our work described below. In our work, we make an attempt to analyze some of the issues raised above, based on an analysis of field observations we made in 1937 at the Novaya Golubovka mine.
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