METHOD FOR COMBINED DEVELOPMENT OF GENTLY PITCHING COAL BEDS Russian patent published in 2016 - IPC E21C41/18 E21C41/00 E21C45/00 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in development of coal bed, including with non-standard conditions of coal beds, as well as at final stage of open mining and already used mine fields. Method of combined development includes following stages. Stage of development of coal beds with capacity of up to 5 m, on which open mining operations manufacturing involves preparation of coal bed and platform. On aligned platform, installing a system for open underground development, using said system for open and underground mining in an ascending path performing coal extraction with extraction chambers with width of 4 m and height of 4.5 m, length of up to 300 m, wherein inclination angle of chambers corresponds to seam dip angle and can vary in a range from 0 to 25° to horizontal line. Between extraction chambers on horizontal component a barrier pillar is left with width of 5 m. And a stage of development of coal beds with capacity of more than 5 m or formations above 5-metre mark from base of platform, on which over said extraction chambers are drilled wells with diameter of 200-250 mm, length of up to 300 m.

EFFECT: invention increases completeness of coal production.

1 cl, 4 dwg