METHOD OF MINING ORE BODIES Russian patent published in 2023 - IPC E21C41/22 

FIELD: mining industry.

SUBSTANCE: invention can be used in the development of deposits with flattened or thinning mineralization. SUBSTANCE: method for mining ore bodies with pillars of a hexagonal shape in the longitudinal section includes driving in each column of the outlet and sublevel drilling workings and along the border between adjacent pillars of the general drilling working, drilling the column with ring of wells along a sparse grid above the outlet working, forming the lower end bevel of the column by mining it to its axis in layers inclined at an angle of 45° -ϕ/2, where ϕ is the angle of internal friction of the broken ore, the breaking of the column together with the formation of the upper bevel in the next column, the formation of a zone of large-sized ore with a lattice structure throughout the thickness and height of the column, preventing an increase in the output of oversized, mass end release from a stationary hole, mining of the remaining in the base ledge column together with the corner part of the next column. Mining is carried out by double pillars, while the close ellipsoids of pure ore are deformed in a cross-sectional shape close to rectangular, eliminating the need to excavate in the second turn the drift pillar with the ore of the "dead" zone. By crossing the pure ore ellipsoids, zones of double ore flow rates are formed. A zone of lumpy ore is created with a variable shape and width with an increase in the lower part to 3/4 of the column width, a narrowing of its middle part, causing straightening of the sides of the pure ore ellipsoid, and making the upper part of the zone funnel-shaped, covering the entire column area. To enhance the effect, a complementary arsenal of processes and operations is performed: expanding the end of the outlet opening, installing spacer columns along the axis of the working, shifting the shipment of ore to the sides of the working, washing out enriched ore fractions from the corners of the outlet working.

EFFECT: reducing losses and impoverishment of the ore and increasing the intensity of extraction.

1 cl, 5 dwg