Hard ore rock stripping technology and system of open-pit mine

Abstract

A hard ore rock stripping technology of a surface mine includes the step of drilling a blast hole array. The blast hole array includes a plurality rows of blast holes; the blast holes of the adjacent rows in the row directions are mutually staggered; each blast hole corresponds to a position without a blast hole, of the blast hole in the adjacent row; the distance between the adjacent blast holes in each row is hole distance; and the distance between the adjacent blast hole rows is row distance. The technology is characterized in that a small-bore drill bit is used for drilling at a small hole pattern distance, the rock drilling speed is improved by A times compared with that of the prior art, the construction operation is performed at per the small hole pattern distance, the drilling frequency is improved by B times compared with that of the prior art, while the area of each drilling hole is 1 / B of the area of the prior art, and A and B are natural numbers larger than 1. The technology greatly lowers the bulk rate and blast root residual rate, the stripping operation can be performed continuously, the operation is convenient, other investments are not needed, the loading is unchanged, the punching time is shortened, and the secondary blasting load is greatly reduced.

Description

technical field [0001] The invention relates to the mining and stripping process and system of the hard ore rock mass in the open-pit mine. In the process of stripping the open-pit stope, parameters such as the size of the aperture, the hole distance, and the row distance are selected and invented, and unexpected results are obtained. technical effect. It not only reduces the long-standing problem of large block rate, but also improves the mining drilling process. Background technique [0002] According to the existing technology, in the mining operation of the mining enterprise, it is necessary to drill the array of blastholes. Among them, the parameters used in the past are: the diameter of the blasthole is 150mm; the hole distance is 7.0m; the row distance is 4.0m. For a long time, however, no one doubted the rationality and economics of these parameters. [0003] But the problem that has always existed is that there will always be a second change of guns in mining oper...

AI Technical Summary

Problems solved by technology

However, for a long time no one doubted the rationality and economics of these parameters

[0003]The problem that has always existed is that there will always be secondary changes in mining operations

[0004] Consequences: long operation time, waste of blasting material, and increased perforation workload

[0005] However, the prior art has not considered changing these technical parameters to improve the benefits of actual production

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