METHOD FOR EXTRACTION OF STEEP-DROPPING AND SLANTING DEPOSITS OF LOWE AND AVERAGE MASSIVENESS Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: method includes separating resources of all levels on blocks, in form of upwardly elongated hexahedrons. Blocks on adjacent levels are positioned in staggered order with displacement of some of them relatively to others for half of blocks width. Resources of each block within limits of hexahedron are divided on two portions: hexagonal chamber inside the block and block itself of same hexagonal shape on all six sides of chamber. Preparation and cutting of chamber resources is realized by driving field level drifts and mines, intermediate sub-level drifts and mines, and also level and sub-level orts and drifts, driven through mineral resource, from which resources of chambers and blocks are drilled and exploded. Extraction and outlet of mineral resource is performed in three rows - first chamber resources, than inter-chamber blocks under protection of ceiling blocks, after that ceiling blocks deposits. Outlet of resources from chambers and blocks is performed trough ends of level orts and mines, an also through ends of intermediate sub-level mines.

EFFECT: better use of mineral resources, lower laboriousness, lower costs, decreased block preparation time.

2 dwg