Internal discharge method during anticline passing period of open-cast mining

Abstract

The invention relates to an internal discharge method during anticline passing period of open-cast mining. After a working slope enters an anticline region, an L-shaped operating line is arranged, an original stope operating line is arranged on one side of the L-shaped operating line, the other side of the original stope operating line is obliquely arranged along an ore body baseplate, and propulsion from one end slope to the opposite end slope of a stope is carried out. Meanwhile, an internal waste dump is obliquely arranged along the ore body after being rotated in the propulsion direction and follows up the side, arranged in the inclination direction, of the L-shaped operating line to form a new internal waste dump. According to the internal discharge method, based on the situation that the operating line is transversely arranged during the anticline passing period, the dip angle of the base of the internal waste dump is reduced, internal discharge of stripped materials is realized by fully utilizing the internal waste dump space. The internal discharge method can effectively reduce the land area occupied by external discharge, meanwhile, reduces the dumping transport distance of a truck and lowers the mine production cost.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining, and in particular relates to an internal drainage method during an anticline crossing in open-pit mining. Background technique [0002] For open-pit mines with inner rows, when the working line advances to the anticline area, the inclination angle of the ore body floor often exceeds the maximum inclination angle specified by the inner dump site. When advancing in the normal direction of the working side, the ore body floor inclination angle is too large to form The internal discharge of soil is flat, and the internal discharge of stripped objects cannot be realized. After the work gang enters the internal dump, the stripped waste rock can only be transported to the external dump, resulting in a waste of goaf space. At the same time, due to the influence of the anticline structure, the production stripping ratio of the mine has increased sharply, and the amount of stripped matter has incre...

AI Technical Summary

Problems solved by technology

[0002] For open-pit mines with inner rows, when the working line advances to the anticline area, the inclination angle of the ore body floor often exceeds the maximum inclination angle specified by the inner dump site. When advancing in the normal direction of the working side, the ore body floor inclination angle is too large to form The internal discharge of soil is flat, so that the internal discharge of stripped objects cannot be realized. After the work gang enters the internal dump, the stripped waste rock can only be transported to the outer dump, resulting in a waste of space in the goaf

At the same time, due to the influence of the anticline structure, the production stripping ratio of the mine has increased sharply, and the amount of stripped matter has increased. If it is discharged outside, it will inevitably result in a large area of ​​land, an increase in the cost of soil discharge, and an increase in mine production costs.

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