FIELD: mining industry.
SUBSTANCE: preparation of resources of ore body is performed by driving in main level and on other levels of field backup drifts, from which drifts are driven and along lying side ore trench drifts are driven. Resources of levels are separated on sections, in each of which ascending lines are driven, from which sub-level ore drifts are driven and then ascending lines are cut on cut slits. Extraction of block deposits is realized via deep wells from trench drift and sub-level ore drifts. Outlet of ore mass is performed through ends of drifts into field drifts of levels and main level.
EFFECT: lower dilution and ore losses.
2 dwg
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