METHOD FOR COMBINING STRIPPING OPERATIONS IN A QUARRY WITH THE RECLAMATION OF THE UPPER DUMP TIER WITH A DRAGLINE Russian patent published in 2022 - IPC E21C41/32 E21C41/26 E21C47/00 

FIELD: mining.

SUBSTANCE: method relates to mining, in particular to open-pit mining and restoration of areas disturbed by open-pit mining, and can be used in the reclamation of overburden dumps. The method for combining overburden work in a quarry with the reclamation of the upper dump tier by a dump walking dragline excavator includes the creation by a bulldozer of a collar of a fertile soil layer (FSL) 1.5–3 m high on the roof of the upper overburden ledge along the excavator’s entry with a straight shovel, separate extraction by a straight shovel of a FSL with a bulldozer diluted overburden under the collar and shipment to the delivered railway train in dump cars allocated for the FSL. Alternate loading by excavator of ordinary overburden rocks into the remaining dump cars in the composition, their transportation to a dump, their alternate unloading into a pit, transshipment of ordinary overburden rocks by a dump walking excavator into the lower substage. Transshipment of FSL with impoverished overburden under the collar to the upper substage. Initially, a FSL collar is created with a bulldozer in the extreme left sector of the entry. With a straight shovel excavator, sequentially in space, the excavation of ordinary overburden and its shipment to dump cars is performed by sectors in the entry. Then, the FSL shoulder is excavated with diluted overburden rocks under the irregular trapezoidal prism shoulder in the volume of a given shipment value in one dump car. Dump cars with ordinary overburden from the arrived railway train are unloaded to the dump to the far part of the pit in the direction of the dump walking dragline excavator, and dump cars with FSL with diluted overburden under the shoulder are unloaded into the near part of the pit towards laying the FSL in the upper substage.

EFFECT: improving the quality of the reclamation mixture, including a fertile soil layer with impoverished rocks of the upper overburden ledge, in the form of a mass fraction of humus, during the reclamation of the upper dump layer.

1 cl, 2 dwg