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The Velenje Coal Mine is building a new shaft NOP II for the transportation of coal from the mine. The entrance of the shaft, which is determined on the surface, and the bottom of the shaft, which is expected in the point determined at the bottom of the shaft, must be within the same vertical and horizontal coordinate system. The starting points for the measurements are the points determined on the surface, which are stable or have a determined direction and velocity. The transfer of the coordinate system from the surface into the shaft can be carried out with the measurements using various methods. The results of the measurements and the calculations are the coordinate points in the shaft that are in the same coordinate system as those on the surface. They are very suitable for the determination of the designed NOP II shaft. At the beginning of this task, we planned to determine the coordinates of the starting points with a maximum precision. Based on the results of an analysis, we can conclude that we performed each phase of the work very well and achieved the tasks set.

Mine Surveillance Measurements During the Building of NOP II shaft