Method for the exploitation of open-air mining fields

Details Method for the exploitation of open-air mining fields Method for the exploitation of open-air mining fields

E - Fixed Constructions

21

C

E21C 41/26 (2006.01)

Patent

CA 2331181

The present invention pertains to the mining industry and may be used in the exploitation of ore fields regardless of their thickness or stratification angle in order to reduce the volume of overburden operations. This invention involves exploiting the main fields during open-air mining operations in order to form protection benches (22) on the quarry faces. In one plane, the fields of each level (1) are exploited by exploding descending holes in the direction of the quarry working boundary in order to form protection prisms on the planned outline of said quarry. The protection prisms (5) are broken down during the final step of operations on the level (1) so as to form a vertical or nearly vertical talis within the limits of said level. The rocks of the massif (6) surrounding the outline, in the regions where they are likely to move, are reinforced by injection and/or by placing prestressed anchors (8).

Cette invention, qui se rapporte à l'industrie minière, peut être utilisée lors de l'exploitation de gisements de minerais indépendamment de leur épaisseur ou de leur angle de stratification, et permet de réduire la quantité de travaux de mise à jour. Cette invention consiste à exploiter les gisements principaux au cours de travaux miniers à ciel ouvert de manière à former des gradins de protection (22) sur les fronts de carrière. Dans le plan, les gisements de chaque niveau (1) sont exploités en faisant exploser des puits sous-jacents en direction de la limite de travail de la carrière de manière à former des prismes de protection sur son contour prévu. Les prismes de protection (5) sont démantelés lors de l'étape finale des travaux sur le niveau (1) de manière à former un talus vertical ou proche de la verticale dans les limites dudit niveau. Les roches du massif (6) entourant le contour, dans les zones où elles sont susceptibles de se déplacer, sont renforcées par injection et/ou par l'installation d'ancres précontraintes (8).

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