TECHNIQUE FOR DEVELOPMENT OF DEPOSIT BY SYSTEM OF CHAMBER AND COLUMN WORKING Russian patent published in 2003 - IPC

FIELD: mining industry, underground development of blanket deposits of mineral resources of medium thickness. SUBSTANCE: in correspondence with proposed technique extraction chambers are preserved after excavation of stopes by way of successive installation of sections of hydraulically powered reinforcing support which are in turn removed from developed chamber as soon as extraction chamber is developed, are collapsed into transportation position and transported under protection of sections of hydraulically powered reinforcing support installed beforehand into adjacent extraction chamber. Technique makes it possible to diminish loss of mineral resources in pillars thanks to employment of hydraulically powered or self-powered support, to expand application field of this technique under more complex mining and geological conditions and to ensure direct flow ventilation. EFFECT: diminished loss of mineral resources and expanded application field. 5 c, 6 dwg