ROOFING OF POWERED SUPPORT UNIT

摘要

FIELD: underground mineral mining in stopes; powered mining complexes and units for extraction of coal seams. SUBSTANCE: canopy has several shearing wedge-shaped spacers whose width is less than the spacing of support units. Remaining after run of plow or continuous miner unbroken under-roof coal band is extracted by shearer with extended wedge-shaped spacers and beams with the help of hydraulic cylinders. EFFECT: higher efficiency.