METHOD OF SLANT COAL SEAMS DEVELOPMENT Russian patent published in 1996 - IPC

FIELD: miming, development of slant coal seams with angles of seam dip of 0 - 15 deg during roof control by cast solidifying packing of goaf. SUBSTANCE: method provides for stripping and preparation of extraction field by runs, making ventilation and excavation drifts from runs and their connection by joinings, excavation of coal at each section by passes from excavation drift beginning from wing boundary, filling them with cast mixture and achievement of norm flowing through degree of cast mixture. Passes are exercised along seam dip by establishing coal pillars between them. equal to width of passes. After cast mixture obtains strength in neighboring passes coal pillars are worked. Then after working of excavation section is finished ventilation and excavation drifts are filled with cast mixture till joints and located between them coal pillar is excavated with following its worked space filling with cast mixture. EFFECT: method allows to exercise development of slant seams. 5 dwg