METHOD FOR MULTI-LAYER EXTRACTION OF EXTREMELY MASSIVE, MORE THAN 20- 30 METERS, BED OF COAL BY SLANTING LAYERS IN ASCENDING ORDER WITH FULL BACKFILLING OF EXTRACTED SPACE Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: method includes cutting lavas along fall in descending groups in three layers, driving at some distance along cutting and ventilation sides if extraction field of vertical drifts between lower and upper field drifts, connected to lavas and lava cuts by slopes for letting down coal from cleaning pit into cutting drift and feeding backfilling material into extracted space of layers. Additionally two crossing diagonal furnaces are driven, breaking extraction field on four blocks, and drifts from upper ventilation-backfilling drifts. On right and left sides of drift two vertical slopes are driven, which are connected from above and from below by slanting slopes, positioned at 27° angle to drift. On cutting side of extracting field at 20 meters distance from each other layer cutting slopes are made to group of vertical slopes and drift fro letting down coal and feeding backfilling material into extracted space of layers, and on ventilation side of extracting field - downwards form slopes group to layer cut for letting down backfilling material into extracted space of layers. Each group consisting of drift with slopes, can be positioned at distance of 20 meters from each other.

EFFECT: higher efficiency, broader functional capabilities.

2 cl, 11 dwg