METHOD FOR EXTRACTION OF THICK GENTLY DIPPING SEAMS THROUGH THEIR FULL THICKNESS WITH SEAMS SEPARATED BY CLAY INTERCALATION Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: seam is excavated by overhand stoping. Before extraction of lower seam the intercalation is separated from lower seam over clay-coal contact through width of extracted coal strip. When extracting lower seam, clay intercalation is supported. Clay intercalation is sheared and loaded after extracting lower seam through width of coal extracted strip. Coal is extracted from upper seam after loading clay from working space of face. Clay loaded from face is mixed with water to form pulp and pulp is pumped to worked out space. EFFECT: higher efficiency. 4 dwg