UA67284A - Method for development of ore beds - Google Patents

Abstract

Method for development of ore beds comprises the division of the bed to floors and blocks with making preparatory workings, with ore extraction by chambers, drilling and explosion of wells, formation of ceilings, floors and inter-chamber blocks, withextraction of the chamber ore stocks under protection of the ceiling and the inter-chamber block, with bringing down the ceiling and the bottom of the upper floor and inter-chamber block after ore discharge from the chamber, with discharge of the broken ore stock of the ceiling and the bottom of the upper floor and inter-chamber clock under the broken rocks. After extraction of the chamber stock of ore under protection of the ceiling and the inter-chamber ceiling under the broken ceiling and the bottom of the upper floor there is formed a bulk of broken before ore stock of the inter-chamber clock, with enough width, with formation over it of horizontal compensation space with minimum possible height for the broken ore stock of the ceiling and the bottom of the upper floor fall, enough for the loosening given by the condition of the ore discharge. The needed width of the broken ore stock of the inter-chamber block is determined by formula. The needed width of the broken ore stock of the of the inter-chamber block is compared to the calculated width, and at increase over the needed calculated width, at the same time with braking the ore stock of the inter-chamber block, one brakes the drilled before part of the massif at the opposite side of the chamber. Enough width of that part of the massif is determined by formula.