COMPLEX FOR TUNNEL DRIVING WITH INCREASED CROSS SECTION AREA Russian patent published in 2013 - IPC E21D9/00 

FIELD: mining.

SUBSTANCE: complex for tunnel driving comprises a frame, on which two horizontal chutes are fixed rigidly being arranged as stationary to the frame and comprising driving augers, and the chutes are coaxial to each other at the mine base. Above one of the chutes with the auger in the initial position there is an additional chute installed with a driving auger capable of rotation in vertical plane relative to a hinged unit fixed on the frame in its middle part along the mine width, with the help of a drive with a geared wheel as capable of its interaction with the geared rack of circular profile fixed on the frame relative to the axis of the hinged unit fixed on the frame in its middle part along the mine width.

EFFECT: provision of the possibility to drive mines with cross section of semicircular shape.

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