METHOD FOR PREPARATION OF BEDDED DEPOSITS TO REVERSE ORDER OF MINING WHEN IMMEDIATE ROOF ROCK IS UNSTABLE Russian patent published in 2010 - IPC E21C41/16 

FIELD: mining.

SUBSTANCE: invention may be used to develop bedded deposits, for instance potassium ones, in case of reverse order of mining with unstable immediate roof. In process of panel preparation, tunneling combine is used to arrange one transport, two ventilation drifts and also mined slots on workable beds for the whole length of panel. Conveyor drift is tunneled with cutter-loader in sections as mining front advances. Stopes are mined on one of half-panels from conveyor drift. Transport drift is expanded by cutter-loader to section of its working element by periodic cuts, as mining front advances by the length multiple of distance between axes of stopes. During preparation of panel, ore passing wells are drilled from field conveyor drift down to design elevation of bed conveyor drift soil, and these wells are opened when conveyor drifts are tunneled on mined beds, as mining front advances. Distance between ore passing wells is selected as multiple of distance between axes of chambers.

EFFECT: invention makes it possible to significantly reduce scope of mining-preparation works required to commission the panel, and to reduce time of its preparation.

8 cl, 2 dwg