METHOD OF UNSIGHTED HORIZONTAL INSTRUMENTAL SURVEY OF SUBLEVELS USING AN ELECTRONIC TACHEOMETER Russian patent published in 2020 - IPC G01C15/12 

FIELD: mining.

SUBSTANCE: invention is intended for mining industry, and relates to method for production of unsighted horizontal instrumental survey of sublevels. At the stage of preparation, in the cross-section of the connecting hole on the main horizon at the point with known coordinates the electrooptical tacheometer is installed, and on the oriented horizon at least three semitransparent screens are installed. At the measurement stage, the beam of the laser target designator of the electrooptical tacheometer is directed onto semitransparent screens, where light traces are formed. Centers of light traces are fixed with a marker as a point of sight. Coordinates of the light traces are determined using an electrooptical tacheometer in the reflector-free mode using the polar polarization technique. Electrooptical tacheometer is transferred to an orientable horizon, where the coordinates of its standing point are determined using a reverse resection technique by referencing the sighting points. Obtained coordinates are used to determine the coordinates of the points and the direction angles of the sides of the surveying geodetic control on the oriented horizon.

EFFECT: high accuracy of centering and abutting operation, as well as fewer preparatory operations for survey.

1 cl, 1 tbl, 3 dwg