ORE BODY MINING METHOD Russian patent published in 2025 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used in development of inclined pinch-out ore bodies by combined system of development with directed blasting and delivery of ore by explosion. Method includes driving of loading orts-arrivals, haulage and trench drifts, drilling outlet orts above the bottom in a recumbent side, a sublevel drilling joint, an upper drilling drift at the boundary with a recumbent side, a drilling drift in a hanging side at the level of the ceiling, formation of a cutting slot in two turns by short-delay breaking of wells to a trench drift, and then to the formed ore receiving tank, drilling of the chamber with sublevel fans of wells inclined at an obtuse angle to the soil equal to 90°+γ, where γ is angle compensating for gravity, friction and air resistance, breaking of chamber by sublevels with formation of ledge and explosive delivery of ore, formation upon reaching critical exposure of the ceiling of the support prism, complete release from the chamber, caving of support prism and ceiling and release of ore under caving rock, wherein to ensure complete delivery of ore by explosion in chamber, angle of inclination of fans of wells is increased with increase in length of ore delivery, to increase completeness of ore separation and increase kinetic energy, doubled parallel-contiguous fans of wells are drilled at the contact with the lying side, in the ceiling at the influence interval of the output workings the upper layer with thickness equal to 2 burdens, are drilled by double parallel-contiguous wells, increasing degree of ore crushing, the support prism and the remote part of the ceiling, located outside the zone of influence of the outlet workings, are drilled with fans of wells, the angle of inclination of which towards the massif increases with the length of the ore delivery, support prism and ceiling are beaten in three turns with short deceleration, which prevents ore throwing on the lying side into the "dead" zone, ore release under the caving rock is carried out in a step-by-step sequential mode: first, clean ore is tapped through bottom workings before dilution begins; then, full tapping is carried out through the stocks in the recumbent side, and in the third turn, tapping is completed through bottom workings to maximum standard content in the last dose.

EFFECT: reduction of losses and dilution of ore at high efficiency of extraction.

1 cl, 2 dwg