A CHAMBER-PILAR METHOD FOR MINING THICK COPPER ORE DEPOSITS, MAINLY THOSE FORMED FROM ROCKS SENSITIVE TO STRESS CRUMPS

摘要

1. A method of the extraction of thick copper ore deposits, particularly built of rocks exposed to the high risk to stress rock bumps with the use of explosives of the roof bolting and hydraulic filling in which the deposit is extracted according to the top benching method exposing the subsequent strata through the making of inclines, and the roof stratum is extracted according to the chamber-and-pillar method characterised in that in the course of the coal mining, pillars (8) are separated with the use of excavations (4), (5), (6), (7), which pillars have variable slenderness, increasing from the solid towards the level of the lining.IMAGE