METHOD OF MULTI-TIER ORE MINING BY BOREHOLE UNDERGROUND LEACHING Russian patent published in 2024 - IPC E21B43/28 

FIELD: geotechnology.

SUBSTANCE: proposed invention relates to geotechnology, namely to methods of multi-tier ore mining at infiltration type deposits. Proposed method of multi-tier ore mining by borehole underground leaching comprises construction of network of injection and extraction process wells, injection of leaching solutions and extraction of productive solutions. Process wells are arranged in floors according to ore number of storeys at the middle of interwell distance of process wells above located ore interval with shift in plan between wells for different ore intervals of at least 10 m. Ratio of production rates of extraction wells at the upper interval of ore to flow rates of wells at the lower lying interval of the ore body are equal to the ratio of the corresponding thicknesses of the ore body at the intervals of the same name, fulfilling the equalities: at two-tier arrangement of ore Q₂/Q₁=m₂/m₁; at three-tier arrangement of ore Q₃/Q₂=m₃/m₂; at n-tier arrangement of ore Q_n+1/Q_n=m_n+1/m_n, where Q is production rate of extraction well 1, 2, 3, n-th and n+1 ore intervals; m – thickness of 1, 2, 3, n-th and n+1 ore intervals.

EFFECT: creation of a balanced system of simultaneous development of multi-tier, thick ore bodies by process wells.

1 cl, 2 dwg