FIELD: mining.
SUBSTANCE: system for core drilling of an underground bed that surrounds a well shaft comprises: a body of a tool designed for installation in the well shaft near the shaft tunnelling bed for core extraction, a motor, a rotation drive head connected with a motor, a rotary tool. The rotary tool is connected with the rotation drive head with one end and carries a drilling bit on the other end. The drive mechanism comprising an anchor joint for fixation in the well shaft and an axial drive for displacement of the tool body and the rotary tool. The tool comprises a guide for pushing the rotary tool aside from the well shaft into the surrounding bed. At the same time the rotary tool is a tubular tool of core drilling, which carries a circular drilling bit. The hollow shaft stretching from the rotation drive head into the tool body. The motor is connected with the external surface of the hollow shaft for the rotation head drive. Also comprises a coupling of alignment linkage that surrounds the shaft.
EFFECT: increased operational reliability of a system.
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