A kind of surface mining method of gently inclined ore body

Abstract

The invention discloses an open pit mining method for a gentle tip ore body. The gentle tip ore body is divides into inclined layers with the equal thickness and parallel to a bottom plate of the orebody for mining; a main inlet and outlet is arranged at lower corner of the ore body, and the inclining direction of an inclined transporting channel is opposite to that of ore body; and section opening is conducted in the inclining direction and the striking direction of the ore body, a inverted-L type section opening ditch is formed, and a work line is arranged to be as a step composed of multiple reversed-L working surfaces. According to the open pit mining method, by optimizing the position of the inlet and outlet and arrangement of the transporting channel and adjusting arrangement and propelling direction of the work line and the working surface of an open pit, the fact that a triangle ore belt appears the slope surface of the step is avoided, the resource recovery rate is improved advantageously, dilution is reduced, mining construction organization is simplified, the mining cost is reduced, the blasting effect is improved advantageously, the production capacity of the pit is improved, and the initial development engineering amount and the transporting cost are reduced.

Description

technical field [0001] The invention belongs to a mining method, in particular to an open-pit mining method of a gently inclined ore body. Background technique [0002] At present, horizontal platform mining is commonly used in open-pit mining. When mining gently inclined ore bodies with this technology, the inclination angle between the flat plate of the steps and the bottom plate of the ore body is inconsistent, resulting in a triangular ore belt on the slope of the mining steps. If mixed mining will produce large Dilution and loss, if separate mining is required, the blasting construction technology is very difficult, the blasting construction technology is extremely demanding, the construction organization is complicated, and the cost is significantly increased. [0003] In ordinary stepped mining, the working face is parallel or perpendicular to the stope direction, the length of the working line is limited by the size of the stope, and the number of shoveling equipment...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art. In order to overcome the dilution and loss rate of the ordinary step-type mining of the gently inclined ore body, the difficulty of blasting construction technology, the large block rate, and the length of the working line. In order to solve problems such as stope size limitation, large initial development engineering quantity and high mining cost, an open-pit mining method with a gently inclined ore body is provided.

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