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L-shaped mining method under open-underground mining

A mining method and open-pit mining technology, which can be used in surface mining, earthwork drilling, underground mining, etc., can solve problems such as losses, reduce labor costs, and improve the recovery rate of mineral resources.

Active Publication Date: 2013-04-24
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 1 As shown, when the mining face moves forward as a whole, the isolated ore pillar 5 formed between the underground mining 20 and the open-pit mining 10 has not been mined all the time, causing losses

Method used

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  • L-shaped mining method under open-underground mining
  • L-shaped mining method under open-underground mining
  • L-shaped mining method under open-underground mining

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Embodiment Construction

[0040] The L-shaped mining method of open well combined mining of the present invention has two important characteristics. First, change the existing mining method that forms the air intake trough, the working face and the return air trough from the excavation to the mining method that only forms the air intake trough and the stoping face; The U-shaped layout of the wind-slow trough, the working face and the return wind-slow trough is changed to the L-shaped layout of the air-inlet trough and the working face.

[0041] In addition, the L-shaped arrangement of the working face and the air inlet trough are connected with the press-in ventilation system of the mine.

[0042] image 3 The mining method of open well combined mining of the present invention is shown. Such as image 3 As shown, the present invention first starts open-pit mining from the surface, and uses mining equipment to mine the open-pit mine. When the open-pit mining reaches the depth required for underground minin...

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Abstract

The invention discloses an L-shaped mining method under open-underground mining, comprising the following steps: the existing mining mode that an air inlet gateway, a mining surface and an air return gateway are formed by tunneling is changed into a mining mode that only the air inlet gateway and the mining surface are formed by tunneling; the U-shaped arrangement of the existing air inlet gateway, the mining surface and the air return gateway is changed into the L-shaped arrangement of the air inlet gateway and the mining surface, wherein the mining surface and the air inlet gateway which are arranged in an L shape are communicated with a pressed ventilation system of a mine. In the invention, the method is simple, easy and practical, the recovery rate of mineral resource is greatly improved, the tunneling cost is reduced, the roadway tunneling support expense is reduced and the investment expense of tunneling equipment is reduced, so as to be beneficial to solving the problems of roadway maintenance, methane drainage and the like.

Description

Technical field [0001] The invention relates to a mining method of a ore layer, in particular to an L-shaped mining method of open-pit combined mining. Background technique [0002] In the current prior art, in the process of transferring from open-pit mining to underground mining, when mining a horizontal ore layer, it passes from the boundary of the open-pit boundary and the layered ore body along the layered mine within the underground mining range. The working face is arranged in the main body, and the two ends of the working face are respectively arranged with inlet and return channels; the existing arrangement is formed by the working face and the inlet and return channels connecting the two ends of the working face. "U" layout. [0003] In the process of transferring from open-pit mining to underground mining, when mining gently inclined and inclined ore layers, the two ends of the working face are respectively arranged with inlet and return channels. For outcrop mines, if ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/28
Inventor 何富连
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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