METHOD DEVELOPMENT OF COMPLEX COAL DEPOSITS Russian patent published in 2017 - IPC E21C41/26 E21C25/10 E21C47/00 

FIELD: mining engineering.

SUBSTANCE: method involves creating required concentration of stresses by adjusting cutting force in a processing zone and forming breaking zones in the surface layer of the processed array with the help of cutting tools of the working tool of a shearer depending on rock strength characteristics, forming breaking zones considering strength characteristics of across the width of the processed surface. Selective development is performed providing reduction of coal regrinding by increasing spacing of coal cutting tools installation relative to spacing of rock cutting tools by two times. Rotation of cutting tools with discs is carried out in one side by rotation of shafts, on one end of which gears are installed which interact with hydraulic motor through a reducer, and fixing discs with the cutting tools in operation position automatically by stops.

EFFECT: increased performance, reliability and expanded process efficiency of rock breaking with different degree of strength and adhesion, environmental efficiency.

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