CONSTRUCTION METHOD OF NON-WORKING OPEN-PIT WALL Russian patent published in 2013 - IPC E21C41/26 

FIELD: mining.

SUBSTANCE: method includes formation of safety berms, which mutual arrangement and width provide equality of stable and constructional angles of slope of non-working wall within zone specified by open-pit depth and providing location rockslides and rockfalls on berm which are not to be removed during functioning of the wall. At that development of upper zone of open-pit is done using longitudinal and transverse panels with mining works performance from the central part of open-pit to its periphery and towards bank fall with diminishing of open-pit walls under specified angles obtained considering allowance for wall curvature in its lower part without any limitations by parameters and form of pit-end extraction. Optimisation of proportion of retaining and shearing forces effective on the weakest surface of potential rockfall provides reducing of high-altitude zone developed by sections curvilineal in plan to the zone minimal but sufficient for provision of stability of non-working open-pit wall.

EFFECT: rising angles of walls diminishing, reducing volume of overburden operations and optimisation of mining-and-transport equipment operation.

6 dwg