METHOD FOR UNDERGROUND EXTRACTION OF MINERAL RESOURCE FORMATIONS Russian patent published in 2007 - IPC E21C41/18 E21C41/20 

FIELD: mining industry, possible use during underground extraction of inclined mineral resource formations.

SUBSTANCE: method includes division of portion with limited dimensions onto panels, and of panels - onto columns of mineral resource, successive extraction of two columns of mineral resource by one face, extraction of first column by face, moving in direction towards the boundary of extraction section, driving of bypass drift along external boundary of extraction section, driving of section and panel preparatory mines, driving of furnaces between panel and section preparatory mines, turning of face at the limit of extraction section, leaving angle bodies and following extraction of second column by face in direction, opposite to extraction direction of first column. Simultaneously with extraction of first column, before beginning of face turn, angle bodies of panel are extracted by parallel chambers leaving inter-chamber bodies of same width, while extraction of angle sections is performed before face approaches turn beginning location for distance, exceeding width of zone of supporting pressure, being created in front of face. Yielding h of inter-chamber bodies of mineral resource during even partial extraction thereof is determined from mathematical expression.

EFFECT: decreased mineral resource losses in face turn locations, decreased intensiveness of falls on end portions of face and increased efficiency of control over roof in face during its turn.

3 dwg