OPEN-PIT BENCH REINFORCEMENT METHOD Russian patent published in 2013 - IPC E21C41/26 E02D17/20 

FIELD: mining.

SUBSTANCE: method involves driving of underground opening along the open-pit perimetre in its side part, drilling of rings of wells, arrangement in wells of anchors, which are reinforced with solidifying solution. Besides, upper and lower extreme wells of the ring are drilled in the plane perpendicular to longitudinal axis of underground opening and made as through wells; a cable wire is passed through wells; the cable wire ends are taken to underground opening; tension of the cable wire is provided; after that, both wells are filled with concrete, and the cable wire section located beyond the wells are passed above metal mesh arranged on the surface of bench slope. Besides, at mouths of through wells there installed are anchor locks made for example in the form of support shoes with the diameter corresponding to 3-5 diameters of the well.

EFFECT: improving the reinforcement efficiency and reliability of local sections of fractured rock mass.

2 cl, 7 dwg