RU1775559C - Method for open-cast mining of mineral deposits - Google Patents

Abstract

The invention relates to mining and can be used in open pit mining. The aim of the invention is to increase the intensity of mining during transportation of rock mass through excavations by conveyors. This goal is achieved by the fact that the openings are carried out onboard, the trenches are drawn from the openings, they are deepened to the full power output and they are simultaneously working horizons from the center to the flank, and when approaching mining operations of each horizon to the flank, a berm is formed connecting working horizons with overlying horizons. 2 ill. fe

Description

The invention relates to mining and can be used in open pit mining.

There is a known method of open-pit mining of mineral deposits, including the mining of an array and the excavation of the rock mass of the ledges with its subsequent transportation to the ore pass and its mining with circular movement of the working ledges around the ore pass and simultaneously deepening the mining operations in a spiral.

“The closest in technical essence is the method of open-pit mining of mineral deposits, including opening with capital trenches and mining the deposit across the strike of ore bodies with the movement of overburden to external dumps

The disadvantage of the prototype is the low efficiency of field development due to the long development of the field, due to the insufficient intensity of mining and capital works, large distances of transportation of the rock mass to the surface,

The aim of the invention is to increase the intensity of mining during transportation of rock mass through excavations by conveyors.

This goal is achieved by the fact that in the known method of open-pit mining of mineral deposits, including opening a deposit and carrying out cutting trenches intersecting in the center of the quarry floor, connected to the opening mine, building transport communications, working out the horizons of the quarry, transport V4

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mining and deepening of mining operations, openings are carried out onboard, split trenches are carried out from openings, deepening them to the entire power output and simultaneous mining of horizons from the center to the flank, moreover, when mining works of each horizon to the flank form a berm connecting the working horizons with the overlying horizons.

In FIG. Figures 1 and 2 are diagrams illustrating the sequence of open pit mining.

The method is illustrated by the example of open pit mining of a powerful steeply supplying mineral deposit.

The open-pit mining of mineral deposits is carried out as follows.

Split trenches pass in the quarry field (with a periodic recess on the underlying horizons with the formation of sectors 2, followed by mining of sectors 2 from the center of the quarry floor to the periphery, and delivery of mass to the surface through the cut trenches 1 equipped with conveyors 3, and on the formed board of the quarry 4 place special conveyor inserts 5.

Example. Consider the implementation of the proposed method at the Sokolovsky iron ore deposit. Six split trenches pass from the periphery of the quarry field to its center and are connected to each other in the center of the quarry floor and form six sectors 2. Then, sectors 2 are worked out from the center of the quarry field to the periphery of the quarry field. Six EKG-8I excavators are installed in the center where the trench 1 is connected, explosive preparation of the excavator unit for excavation is carried out, while blasting is carried out in a clamped environment and explosive mining of the entire sector is carried out gradually, according to

excavator blocks and rock mass are shipped to a hopper located above the conveyors 3, mounted in a trench 1. In this case, the hopper is movable along the length of the conveyor 3 in accordance with the mining of the excavator block. As sector 2 is mined, at the same time, deepening of the trench 1 is made into the underlying horizons. As the front of mining approaches

the periphery of the quarry floor leaves a transport berm with a width of 8-10 m on each sector 2 of each horizon. On the formed board of the quarry 4 place special conveyor inserts 5.

Claims (1)

The claims A method of open-pit mining of mineral deposits, including opening a deposit and carrying out cutting trenches intersecting in the center of the quarry floor connected to the opening excavation, constructing transport communications, working out the quarry horizons, transporting the rock mass, mining in-depth, excavating and so that, in order to increase the intensity of mining during transportation of the rock mass along the openings by conveyors, the opening openings are carried out on board, split trenches are carried out from the opening workings, they are deepened to the entire worked out power and the horizons are simultaneously worked out from the center to the flank, and when mining operations of each horizon approach the flank, a berm is formed connecting the working horizons with the overlying horizons.