Efficient mining method for thick metal ore body in slanting

Abstract

The invention relates to an efficient mining method for a thick metal ore body in slanting, comprising the following mining steps: constructing a transportation roadway outside a dike, constructing flat roadways for rock drilling by sections, constructing a cutting roadway, constructing a cutting well, constructing a cutting groove and reserving a temporary triangular ore pillar, constructing a trench, constructing a sector medium-deep hole and implementing blasting and ore removal, and recovering residual ore. The method realizes safe and efficient recovering of metal ore bodies with the inclination of 30 to 55 degrees and the average thickness of 4 to 15m by adopting a medium-deep hole blasting ore dropping valve under the circumstance without a filling condition, thereby further improving the mining recovery rate and the mining efficiency.

Description

technical field [0001] The invention relates to a mining method, in particular to a high-efficiency mining method for inclined medium-thick metal ore bodies. Background technique [0002] Metal ore deposits have inclined medium-thick ore bodies (dip angle 30-55°, average thickness of ore bodies 4-15m), which occupy a considerable proportion in my country. Due to the slow inclination angle of this type of ore body, the caving ore cannot be completely discharged at the bottom by its own weight, and it needs to be transported by machinery or manually. Therefore, in the process of mining inclined medium-thick ore bodies, it usually faces a series of technical problems such as difficult selection of mining methods, large amount of mining and cutting engineering, difficulties in ore collapse and ore transportation, low degree of mechanization and operation efficiency, and long production cycle. Recognized at home and abroad as difficult to mine ore bodies. [0003] For the above...

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Problems solved by technology

Although this method can effectively recover ore, due to the slow inclination angle of the ore body, all the routes need to be arranged outside the veins, and no by-product ore can be produced. Moreover, due to the slow inclination angle of the ore body, it is bound to collapse when the ore body is blasted. More footwall rocks, resulting in greater depletion of ore

In addition, when a certain middle section is located in the middle of the ore body to be mined, since the upper part of the ore body still has objects that can be mined, if the caving method is adopted, a goaf will be formed in the lower part, which will inevitably cause difficulties in the recovery of the upper mineral resources in the future

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