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

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...

AI Technical Summary

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

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