METHOD FOR DEVELOPMENT OF INCLINED ORE BODIES OF MEDIUM WIDTH Russian patent published in 2017 - IPC E21C41/22 

FIELD: mining engineering.

SUBSTANCE: method for inclined ore bodies development of medium width, including the division of ore body into sublevels, advancing trenching and delivery drifts along the hanging wall in the sublevel, loading inclines therebetween, mining sublevel reserves with stopes located along the strike of the ore body and consisting of stope and intermediate pillar (IMP), then stope reserves blasting and aerial ore drawing, then IMP blasting to mined out stope area and the output of the IMP ore under collapsed rocks from the same loading inclines. Once headings are developed and stope reserves are drilled in the trench drift between loading inclines, the rock "crests" are formed of heading development rock, then stope reserves are mined out onto formed "crests". The stope extraction is performed with increased width due to formed compliant IMP of trapezoidal shape by reducing the width of the upper part of the rectangular IMP. After mass blasting of trapezoidal IMP combined drawing of ore is performed to the mined out stope under the collapsed rocks. First of all, aerial drawing of ore is made from loading inclines of stope trench sill, and then additional end-drawing of ore performed layer-by-layer remaining on foot wall, in IMP place, from the delivery drift by means of blasting the "brow" pillar with the subsequent drawing of blasted rock and ore contained therein.

EFFECT: reduction of ore losses.

7 dwg