Efficient mining method of medium-thick inclined ore bodies

Abstract

The invention discloses an efficient mining method of medium-thick inclined ore bodies. The efficient mining method comprises the steps that an extracting drift is arranged at an ore body footwall oredrift, and rock drilling, blasting and ore removal are completed in the extracting drift; in the blasting process, through control over blasting parameters of extracting blast holes, overall-type isolated ore boards with the downwards-bent-shaped ends are reserved on the edge portion of the extracting drift of an upper sublevel stope and the border of the upper sublevel stope; in the process of ore extracting, the isolated ore boards are recovered every two step pitches; and at the ore drawing preliminary stage of the step pitches, the isolated ore boards at the first two step pitches are reserved and not recovered, the reserved isolated ore boards are recovered at the step pitches due to roof falling or inbreak of the isolated ore boards till ore drawing of the step pitches is finished.According to the efficient mining method of the medium-thick inclined ore bodies, ore dilution is reduced, the ore recovery rate is increased, and the ore resources are developed and utilized to the largest extent.

Description

technical field [0001] The invention relates to the technical field of underground mining in mines, in particular to a high-efficiency mining method for medium-thick inclined ore bodies. Background technique [0002] Underground mining methods mainly include three basic processes of mining, cutting and back mining, and can usually be divided into three categories: open-field mining, filling mining and caving mining. The caving mining method has the advantages of simple process, high production efficiency, good safety performance and low cost, and has been widely used in underground mines, especially large and medium-sized underground mines. However, one of the characteristics of the caving mining method is to rely on caving surrounding rocks to fill the goaf and release the ground pressure to control and manage the ground pressure. The caving ore and waste rock are in direct contact with each other during the mining process. Obviously, if the ore drawing under the overlying...

AI Technical Summary

Problems solved by technology

In addition, if the footwall rocks are excavated, although some footwall ore residues can be released, a large amount of waste rocks will be released at the same time, resulting in a large loss of ore dilution and low production efficiency

The loss of ore will lead to the waste of mineral resources and huge economic losses; the depletion of ore due to the extraction of useless waste rocks may even cause environmental pollution and destruction, and it will cause economic losses caused by the disposal of waste rocks. loss

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