FIELD: mining industry. SUBSTANCE: orebody is worked by rotary drilling of holes of the first and second phases of different diameters, and withdrawal of drilled out mass to surface. Extraction is carried out by hexagonal cells. Holes of the first phase are drilled with small diameter in tops of hexagonal cells, and the second phase holes are drilled with large diameter in centers of hexagonal cells after filling of all first phase holes of each hexagonal cell. Diameter of the first phase holes equal half length of hexagonal cell side, and diameter of the second phase holes equals 1.1-1.3 diameters of the first phase holes. EFFECT: higher efficiency. 2 cl, 4 dwg
