| 摘要 |
FIELD: mining industry. ^ SUBSTANCE: method includes conditional separation of levels on chambers, which are made in form of stretched upwards hexahedron and placed in staggered order, at each lower level with displacement for half of chamber width in comparison to upper one. Preparation of each lower level is performed by driving field drift of main level, from which entries to ore deposit and orts to hanging side of deposit are driven, from orts ascending drifts are made and cut with cutting slits. For extraction of field resources a field sub-level drift is driven, entries and ore sub-level drift near lying side, from where orts are driven, from drift well fans are drilled and main resources of level are exploded through cutting slit. Outlet of ore from each chamber is performed through ends of outlet mines in main and intermediate levels. After removing main resources inter-level block is destroyed and ore from it is removed through entries of main level. ^ EFFECT: higher efficiency. ^ 2 dwg |
