UNDERGROUND HARD ROCK MINERALS FIELDS DEVELOPMENT METHOD Russian patent published in 2010 - IPC E21C41/16 

FIELD: mining.

SUBSTANCE: method includes preparation and cutting operations, creation of horizontal 1,5,6,8,9 and vertical delineation 7 and separation artificial massifs 10, clearing withdrawal and filling in of developed area 12. All of the vertical artificial massifs 7,10, parallel to one of mutually perpendicular axis of a developing area horizontal cross section, to be trapezoid shaped with a long bottom foundation, to the delineation ones - rectangular shaped with a vertical side along the ore body contour 4 or developing area, the separation massifs 10 - isosceles shaped, and the trapezoid sides inclination angle defines form an equation tgα =hστ/(P_oλσ - (P_a-P_b)τ), where h - floor height, m; σ and τ - the artificial massif compression and shear strength limits accordingly, MPa; λ - horizontal stress factor; P_a, P_b, P_o - natural arch limit rock weight, part of the top artificial border massif weight and ore massif in a gap block weight accordingly. H.

EFFECT: invention allows creating a safe environment condition for high efficiency rate mine sections, delineated with artificial separation slabs, treatment.

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