METHOD OF MINING OF JOINTLY OCCURRING STEEP THIN ORE BODIES IN STABLE AND MEDIUM-STABLE ROCKS Russian patent published in 2003 - IPC

FIELD: mineral underground mining by layers with filling of mined-out space with hardening mixture. SUBSTANCE: method includes mining of mineral resources of extraction block by layers downcast with filling of mined-out space with hardening mixture, driving on layers of entires, mining of ore bodies by doubled in height stopes along deposit strike with extraction of ore bodies of upper layer from nonfilled stopes of lower layer. After extraction of upper layer resources, entires are driven across the strike of ore bodies below floor of worked layer at distance equaling two-fold height of layer, with height of entry equaling height of stope. Mined-out space of stopes is filled with hardening mixture. Extracted last is ore pillar of upper layer left above entry. Width of ore pillar is determined by calculation. EFFECT: reduced expenditures for ore mining due to increased intensity of extraction of block resources as a result of reduction of volumes of development work and reduced impoverishment of ore in its breaking. 3 cl, 4 dwg