EQUIPMENT FOR BORING TUNNEL OF ALTERNATE DIAMETER

FIELD: mining. ^ SUBSTANCE: invention refers to mining, particularly to machines for mine heading and can be implemented at metropolitan tunnel engineering. The suggested equipment includes a rock destructing body with bore bits equipped with cutting tools, the said body assembled so as to turn on a cross bar of a support case with spacing hydro-cylinders, the equipment also includes an indexer of longitudinal travel and a manipulator with a grip for assembling liner plates. Bore bits are made with autonomous rotation drives and are installed in the rock destructing body so as to travel radially, while spacing hydro-cylinders are arranged in pairs in vertical planes on both sides of the support case. The spacing hydro-cylinders and the indexer are located in a supported part of the tunnel and they rest on the inside surface of liner plates, while the manipulator is installed directly on the working body. ^ EFFECT: ability to bore tunnel of an alternate diameter and to expand already bored tunnel with the same complex of equipment; also increased safety of equipment maintenance. ^ 3 cl, 2 dwg