FIELD: mining. SUBSTANCE: shield roofing is mounted to the dip on the floor of inclined layer at seam hanging wall. Layer at hanging wall is extracted under guard rigidly connected with lower edge of roofing base. Layer at hanging wall is extracted under roofing and guard hinged to upper edge of roofing base. Face zones of inclined layers under shield roofing as it advances, are connected by vertical layer in line with coal heading and thickness of layer at seam laying wall is measured. Layers are extracted with the use of powered mechanisms and layer floor is formed in compliance with layer thickness at lying wall of seam. EFFECT: higher efficiency. 3 cl, 6 dwg ЫЫЫ1
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