Process and system for striping and mining solid ore rock masses of surface mine

Abstract

The invention relates to a process for striping and mining solid ore rock masses of a surface mine, which comprises a step of drilling a blast hole array, wherein the blasthole array comprises a plurality of rows of blast holes; adjacent rows of blast holes are mutually staggered along the directions of the rows; each blast hole corresponds to a non-blast hole of the adjacent row of blast holes; on each row, the distance between each two adjacent blast holes serves as a hole pitch; and the distance between each two adjacent blast hole rows serves as a row pitch. The process is characterized in that a small-aperture drill bit and a small hole network spacing are selected to drill the holes; the rock drilling speed is improved for more A times than before; the construction operation is carried out according to the small hole network spacing; the number of the drilled holes is increased to B times that of the original drilled holes; the area of each drilled hole is equivalent to one Bth of the area of the original drilled hole; and both A and B are natural numbers greater than 1. According to the invention, the boulder frequency and the blast root residual ratio can be greatly reduced, the striping and mining operations are continuously carried out, the process is convenient to operate, other investment is not required, the explosive load is unchanged, the drilling time is shortened, and the secondary blast quantity 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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