METHOD OF MINING SURVEYOR INSPECTION OF OPENCAST MINING BY MEANS OF TELEVIDEO-SURVEY Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: survey is conducted at several levels by height in horizontal and vertical plans. Survey operations are performed in two stages. During first stage general horizontal survey of section is executed from above from height point. During second stage-vertical survey (side) of each bench of stripping by movement of survey gear along vertical above same point. For provision of scaling of shots and their referencing to surface and to each other marking of benches is carried out before start of survey. For provision of matching of horizontal shots marking signs are installed on upper edges of benches and have horizontal and vertical parts. Same figure is applied to vertical and horizontal parts of each marker. EFFECT: enhanced functional efficiency of method. 2 dwg