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L-shaped mining method under open-underground mining

A mining method and open-pit mining technology, which is applied in ground mining, earth square drilling, underground mining, etc., can solve the problems of unmined and loss of isolated ore pillars 5, and achieve the effect of improving the recovery rate of mineral resources and reducing labor costs

Active Publication Date: 2011-04-27
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
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  • 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 features. Firstly, change the existing excavation method of tunneling to form the wind-in trough, mining face and return-wind trough to the mining method of only tunneling to form the wind-in trough and the mining face; secondly, the existing mining method The U-shaped arrangement of the wind trough, the recovery working face and the return air trough is changed to the L-shaped arrangement of the air inlet trough and the recovery face.

[0041] In addition, the L-shaped arrangement of the mining face and the air inlet chute communicates with the press-in ventilation system of the mine.

[0042] image 3 The mining method of the open well combined mining of the present invention is shown. Such as image 3 Shown, the present invention at first begins to carry out open-pit mining from the ground surface, utilizes mining equipment to exploit the ore seam of open-pit mine. ...

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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 mine seam, 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 exploiting a horizontal ore layer, the layered ore in the range of underground mining is passed from the junction of the open-pit boundary and the layered ore body. The working face is arranged as a whole, and the two ends of the mining face are respectively arranged with the air inlet trough and the return air trough; the existing arrangement is formed by the mining face and the air inlet trough and the return air trough connecting the two ends of the mining face "U" arrangement. [0003] In the process of transferring from open-pit mining to underground mining, when mining gently inclined and inclined ore seams, the two ends of the mining face are respectively arranged with air inlet and r...

Claims

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Application Information

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