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A kind of medium-deep hole stope bottom structure and recovery method with low mining and cutting ratio

A technology of bottom structure and recovery method, applied in ground mining, earthwork drilling, underground mining, etc., can solve the problem of low recovery rate of pillar ore, and achieve the effect of reducing the amount of mining and cutting engineering, easy recovery, and improving recovery rate.

Active Publication Date: 2022-07-05
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Description
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Problems solved by technology

The recovery of the triangular pillars at the bottom of the middle and deep hole stope is related to the size of the triangular pillars and the quality of the filling body; when the size of the triangular pillars is small, the selection of construction equipment for pillar recovery will be greatly restricted; the quality of the filling body When it is poor, the triangular ore pillar will reserve a thicker wall ore, resulting in a low ore recovery rate of the ore pillar

Method used

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  • A kind of medium-deep hole stope bottom structure and recovery method with low mining and cutting ratio
  • A kind of medium-deep hole stope bottom structure and recovery method with low mining and cutting ratio
  • A kind of medium-deep hole stope bottom structure and recovery method with low mining and cutting ratio

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Embodiment 1

[0044] see Figure 1 to Figure 3 As shown in the figure, a middle-deep hole stope bottom structure with a low cut-to-cut ratio of the present invention includes several adjacent unit stopes 100, and each unit stope 100 includes two mirror images each with a width of 15m. Symmetrical adjacent segmented stopes 1, each segmented stope 1 is provided with rock drilling tunnels 11 distributed in mirror symmetry, and the distance between the central axes of the two rock drilling tunnels 11 is greater than that of a single segmented stope 1. width, forming a large pillar 13. Two large pillars 13 of two adjacent sub-section stopes 1 are combined to form a large triangular pillar 14 with a width of 15.6m and a height of 13m, which is easy to recover; Wherein, the horizontal angles of the free surfaces of the small ore pillars 12 and the large ore pillars 13 in the sectional stope 1 are both 45°. In addition, the unit stope 100 is also provided with a piercing and mining roadway 2 , a ...

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Abstract

The invention provides a medium-deep hole stope bottom structure and a recovery method with a low mining and cutting ratio. The distance between the shafts is larger than the width of a single segment stope, so that a large triangular pillar that is easy to recover is formed in the unit stope. The small-section rock drilling tunnel is excavated in the middle of the large triangular mine column, and the medium-deep hole fan-shaped blasthole is constructed upward, and the ore is caved in the method of differential blasting to achieve the purpose of recovery; the same method is used until the bottom of the entire medium-deep hole stope is drilled. The recovery of the triangular large pillar in the structure is completed. By changing the bottom structure of the medium-deep hole stope, the invention reduces the number and increases the volume of the bottom columns to be recovered, and only needs to recover one bottom column for every two stopes, reduces the amount of mining and cutting engineering, and improves the recovery of the bottom columns. rate, stability and safety; reduce the loss rate of ore, increase mining revenue, and produce significant economic benefits.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a bottom structure of a medium-deep hole stope with a low cutting-cut ratio and a recovery method. Background technique [0002] In the process of continuous development of society, the problem of shortage of mineral resources has become increasingly prominent; mineral resources are non-renewable resources, so while strengthening the exploration and development of mineral resources, it is also necessary to continuously improve the efficiency of ore recovery, so as to maximize the recovery of mineral resources from the mining deposits. recovery of mineral resources. To fundamentally stabilize the output of the mine, it is necessary to effectively recycle and utilize a large number of residual ore bodies and pillars in the stope, so as to improve the utilization efficiency of mine resources and prolong the service life of the mine. Pillar recovery refers to the recovery of the safe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21B7/04F42D3/00F42D1/00
CPCE21C41/22E21B7/04F42D3/00F42D1/00Y02P10/20
Inventor 王亚军盛佳李强李向东张海云朱青凌李伟明刘东锐李晓辉李士超王玉丁张为星
Owner CHINA MINMETALS CHANGSHA MINING RES INST
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