METHOD OF BLOCK BOTTOM FORMATION IN THINNING-OUT ORE BODIES

摘要

FIELD: mining; applicable in underground mining of ore bodies thinning-out above haulage level. SUBSTANCE: method of block bottom formation in extraction of thinning-out ore bodies includes making of ore receiving funnels and haulage drifts for haulage level. Haulage ore chutes are made directly from each ore receiving funnel. In this case, diameters of ore chutes are formed to comply with 4-6 sizes of ore standard pieces. EFFECT: simplified design of block bottom and higher safety of mining operations. 2 dwg