FIELD: mining.;SUBSTANCE: device includes rock cutting tool - bore bit and heat-resistant cutters. Device is equipped with core barrel the upper part of which is connected to shaft of electric motor, on which the rotating part of current collector is fixed. The other part of current collector is rigidly attached to housing of electric motor, and electric motor is connected through manual control of axial load on bottom-hole to guide post. Laser device is fixed with shaft of electric motor through rotating part of current collector, the laser beam of which is focused on the bottom-hole through the cavity of tube the lower end of which is rigidly attached to cylindrical bore bit equipped with heat-resistant cutters.;EFFECT: improving drilling efficiency of wells of various purpose in hard mine rocks, eg in granite blocks.;1 dwg
展开▼
