METHOD OF AERODYNAMIC PROFILING OF EDGES OF OPEN PITS AND COAL STRIP MINES Russian patent published in 2015 - IPC E21C41/26 

FIELD: mining.

SUBSTANCE: method describes the selection of sections in the zone of wind currents, drilling of ledges by wells, charging them with explosive charges, blasting and excavation of the blasted mined rock. Meanwhile only upper ledges are drilled without subdrilling to the design outline of the edge profile, and charging and blasting of wells is performed stage by stage by blocks to the profile height. The correlation of the angle of incidence and profile of the open pit edge and the dominating wind speed under the mathematical formula is determined.

EFFECT: improvement of performance of ventilation of open pits and coal strip mines by ensuring of continuous streamlining of edges of open pits and coal strip mines by a natural air flow.

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