Mining method of surface mine

Abstract

The invention discloses a mining method of a surface mine. The mining method of the surface mine comprises the following steps that in the advancing direction of a working slope in a stope, blasting holes, which are filled with various explosives, are arranged along a stratum; the blasting holes are arranged on the two sides a boundary of mine-rock; ores and rocks are blasted for one time, millisecond blasting is chosen to use in the boundary to ensure the separation of the ores and the rocks; mining perpendicular to the advancing direction of the working slope is carried out at the same time,and when the ores are mined by shovel loading, ores of a top plate on the right side are mined firstly according the sequence of ore-rock-ore-rock-ore from right to left, namely, a bottom plate is mined after the top plate is mined. According to the mining method of the surface mine, disadvantages of traditional separated blasting and separated mining are overcome, the resource recycling rate iseffectively improved, large-scale blasting operation is conducted to reduce the appearance of side pores and corner pores, the production of blasting foundations is effectively decreased, the appearance of blasting problems is overcome to improve the shovel loading rate and improve equipment efficiency and the ore recycling rate, and at the same time, the controlling of step flatness is facilitated.

Description

technical field [0001] The invention relates to the technical field of open-pit mining, in particular to a mining method for open-pit mines. 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. [0003] In the mining process of open-pit mines, the method of blasting, shoveling, and cutting of small pieces is often adopted parallel to the advancing direction of the working gang, according to different lithology ore bodies, that is, separate blasting and separate mining. During the mining process, this method can easily cause the loss of ore body resources. More or less ore and rock are always mixed into the crushing production system, result...

AI Technical Summary

Problems solved by technology

During the mining process, this method can easily cause the loss of ore body resources. More or less ore and rock are always mixed into the crushing production system, resulting in unqualified products, especially the narrow ore body position is not conducive to the quality of resources. use

Secondly, roots are prone to appear at the junction of mines and rocks, and the shoveling equipment needs to be moved frequently, which has a great impact on the efficiency of the equipment

Thirdly, the flatness of the steps is not easy to control by adopting the method of split burst and split mining

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