Progressive caving mining method

Abstract

The invention discloses a progressive caving mining method. An ore body is divided into a middle section in a vertical direction, the middle section is divided into subsections, a roof pillar is divided at the upper part of the middle section, a floor pillar is divided at the lower part of the middle section, an inverted trapezoidal mining area is distributed in the middle section, a first wing of the inverted trapezoidal mining area is a substoping area, a substoping working face is distributed from bottom to top in a step shape, and caving ores are left; a second wing of the inverted trapezoidal mining area is a rock stratum caving area and is covered by caving rocks; the top part of the inverted trapezoidal mining area is a roof and floor pillar, a part of the roof and floor pillar, close to the second wing, is a caving area, and a concentrated mined-out area is formed at the bottom of the inverted trapezoidal mining area; a barren rock goaf is formed between an ore pile of the first wing and a rock pile of the second wing under the roof and floor pillar of the inverted trapezoidal mining area, and the majority of caving ores are mined out under a rock-free overlying condition. Mining can be continuously carried out along an ore trend, and the method has the characteristics of high production capacity, low mining loss dilution rate, and low mining cost.

Description

technical field [0001] The invention relates to the field of metal mine collection, in particular to an underground continuous caving mining method for metal mines. Background technique [0002] Caving mining is often used in underground mining of metal mines. The existing caving mining methods mainly include the stage caving mining method of forced caving, the segmented caving mining method, the layered caving mining method, and the natural caving mining method with the help of secondary concentrated stress caused by bottom cutting and ore self-weight falling. . In addition to the lower efficiency of the layered caving mining method and less application, other methods are widely used in the mining industry. It has more advantages in terms of cost and mining scale. However, the existing caving mining method has a common feature, that is, the ore is drawn under the cover rock, and a complex-shaped contact surface between the ore and the rock is formed during the ore drawin...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of continuous caving mining method, to solve the caving mining method because the rock on the ore-rock contact surface is constantly mixed in the ore during the ore drawing process, resulting in a larger mining loss rate and mining dilution rate, A lot of waste of mineral resources, reducing the efficiency of mining enterprises; and significantly expanding the scale of mining areas, improving mining efficiency and mining production capacity

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