A grid-type mining method in an open-pit mine

Abstract

The invention discloses an open pit mine grid mining method. The method comprises the following steps: a stope is divided in a grid format along the strike, a plurality of mining grids are obtained, pillars are left between each of the mining grids; stripping, mining and abandonment operations are carried out in sequence on the mining grids by adopting a stoping sequence of layered mining; movabletype preliminary screening equipment is arranged in a mining area, materials below a sieve are used for slurrying, slurry is transported to a beneficiation workshop, and the materials on the sieve isdirectly discharged to gobs of the current mining grids; mine wastes are transported by trucks to a disposal area, and mill tailings produced from the beneficiation workshop are transported to the disposal area through pipelines; by adopting the open pit mine grid mining method provided by the invention, the material transportation volume can be effectively reduced; the gobs of the stope are utilized for storing tailings, thereby saving land resources; the mining, slurrying, pumping and returning of water are carried out inside the stope, thereby ensuring a process to be more compact, and improving the operating efficiency of a whole system; and the mill tailings disposal is integrated with the inner discharge of the mine wastes, thereby achieving the green mining of mines.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a mesh mining method in an open-pit mine. Background technique [0002] Open-pit mining is a process of removing the covering on the ore body to obtain the required minerals. It generally includes operations such as perforation, blasting, mining, transportation, and soil dumping. The advantages of open-pit mining are full resource utilization, high recovery rate, Low dilution rate, suitable for large-scale mechanical construction. At present, the single-bucket-truck process is usually used in open-pit mines, and the specific implementation process is as follows: After mining, the stripped material is transported along the stope side to the inner row of the gob in the stope, and the excavator at the working face loads the dump truck. The materials are transported to the roughing workshop, and the roughing and selected tailings are transported to the specially establish...

AI Technical Summary

Problems solved by technology

At present, the single-bucket-truck process is usually used in open-pit mines, and the specific implementation process is as follows: After mining, the stripped material is transported along the stope side to the inner row of the gob in the stope, and the excavator at the working face loads the dump truck. The materials are transported to the roughing workshop, and the roughing and selected tailings are transported to the specially established tailings pond through pipelines. The tailings pond not only occupies a lot of land, but also seriously damages the ecological environment, and increases the cost of land acquisition in the mining area. The large amount of material transportation and cumbersome process flow increase the production cost of mining enterprises

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