METHOD FOR MINING STEEP MEDIUM-THICKNESS COAL SEAMS

摘要

FIELD: methods for mining steep medium-thickness coal seams. SUBSTANCE: method for mining steep medium-thickness coal seams includes driving of storage and vent drifts. Mounted on the floor of upper vent drift if flexible roofing made of separate rings to form channel by their inner surfaces and interconnected by chains. Gradual transfer of flexible roofing is effected as underlying sublevels are worked and dismantling is accomplished on the storage drift. EFFECT: higher efficiency. 4 dwg