METHOD OF UNDERGROUND MINING OF DEPOSITS IN CRYOLITIC ZONE Russian patent published in 2001 - IPC

FIELD: mining; applicable in mining of deposits under conditions of cryolitic zone (in permafrost rocks( by systems with filling of worked out spaces and formation of filling mass ( artificial pillar). SUBSTANCE: cryolitic zone possesses specific conditions, particularly, subzero temperatures of rock mass to depth of 1500 m. Method includes formation of primary chamber workings, supply of filler, binding agent and cooled air to chamber. Method is distinguished by the fact that successively supplied to chamber are filler and binding material in volumes determined by formula given in the invention description. EFFECT: provided maximum recovery of mineral from earth interior, preserved ecological cleanness of region, excluded use of wood for support of mine workings. 3 cl