METHOD FOR PERFORMANCE OF UNDERGROUND MINE TUNNEL OF ROUND CROSS SECTION Russian patent published in 2009 - IPC E21D9/06 E21D11/00 

FIELD: mining.

SUBSTANCE: invention is related to mining, in particular to mechanised performance of underground mine tunnels with round shape of cross section. Method for performance of underground mine tunnel of round cross section includes formation of oriented cavity in the Earth bowels, cutting of helical and longitudinal radial channels in edge zone of tunnel in surrounding rock mass, loading and transportation of broken muck, maintenance of stripped area by erection of support and organization of ventilation. Together with cavity formation they cut three longitudinal radial channels, evenly distributing them in plane of tunnel cross section. At the same time one of longitudinal radial channels is oriented along line of most probable largest action of external load from forces of rock pressure. Damaged rock is removed from longitudinal radial channels and loaded in transport vehicle. In longitudinal radial channels they install embedded elements, to which support elements are connected. Besides depth of longitudinal radial channel makes at least half of radius of cross section of produced tunnel.

EFFECT: higher reliability of mine tunnel maintenance in operational period.

3 dwg