Mining method for stoping inclined extremely-thin mineral veins

A mining method and ultra-thin ore technology, which is applied in ground mining, mining equipment, underground mining, etc., can solve problems such as slipping and falling of workers, large amount of mining and cutting, and poor safety of working faces

Active Publication Date: 2019-07-12
KUNMING METALLURGY COLLEGE
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The main problems of these mining methods are: the inclination angle of the working face is too large, and accidents such as slipping and falling often occur to workers; improper disposal of wall-cutting waste rocks, high labor intensity, and poor safety of the working face; inadequate technical measures, low resource recovery rate, and Low ore grade; large mining and cutting engineering volume, high mining cost, etc.

Method used

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  • Mining method for stoping inclined extremely-thin mineral veins
  • Mining method for stoping inclined extremely-thin mineral veins
  • Mining method for stoping inclined extremely-thin mineral veins

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Embodiment 1

[0030] like figure 1 , figure 2 As shown, in the mining method for mining inclined extremely thin veins described in this embodiment, the ore body dip angle is 40°, the thickness is 0.6m, and the hanging wall rock is above medium and stable. Adopt mining method provided by the invention to mine, its main technology is as follows:

[0031] Mining area setting: along the strike of the ore body, every 500m is divided into a mining area, and the mining area is mined from one end to the other along the strike. The height of the middle section is 25m, and the transport level roadway 1 in the middle section is excavated outside the orebody lower plate vein, 3m away from the orebody floor, and the pedestrian shaft 2 is used to communicate with the mining area every 50m along the orebody direction. A middle ore pillar 10 with a thickness of 3m is left between the middle sections.

[0032] Mining and cutting: from the middle section of the transport level roadway 1, along the direct...

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Abstract

The invention discloses a mining method for stoping inclined extremely-thin mineral veins. The mining method for stoping the inclined extremely-thin mineral veins comprises the steps that mining areasare divided in the direction of an ore body for continuous stoping; a working face is arranged in a forward pseudo-inclining mode; mining is carried out in the unit of pseudo-inclining strips, and the bottoms of all the strips are cut firstly; a rubber cushion is laid on waste rock after waste discarding is completed, and then upper-layer ore is blasted down; bottom cutting blast holes are parallelly formed in the inclining direction of the ore body, and the blasting direction points to one side of a mined area; ore caving blast holes are parallelly formed in the direction of the ore body andare perpendicular to the bottom cutting blast holes, and the blasting points to an ore body bottom plate and the lower parts of the mining areas; and directional pinpoint blasting is carried out by means of sublevel millisecond ignition. According to the mining method for stoping the inclined extremely-thin mineral veins, improvement of safety of the working face is facilitated, the ore recoveryrate and mined ore grade of the mining of the inclined extremely-thin mineral veins are improved, the stope preparation work amount is less, and the mining cost is low.

Description

technical field [0001] The invention belongs to the technical field of non-coal underground mining, and in particular relates to a mining method for mining inclined extremely thin veins. Background technique [0002] In non-coal underground mines, wall-cutting and filling method or room-and-pillar method or comprehensive method of separate mining and transportation are often used to mine inclined extremely thin veins. The main problems of these mining methods are: the inclination angle of the working face is too large, and accidents such as slipping and falling often occur to workers; improper disposal of wall-cutting waste rocks, high labor intensity, and poor safety of the working face; inadequate technical measures, low resource recovery rate, and The ore grade is low; the mining and cutting engineering volume is large, and the mining cost is high. [0003] In view of this, the present invention is proposed. Contents of the invention [0004] The technical problem to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F15/00F42D3/04F42D1/00
CPCE21C41/16E21F15/00F42D1/00F42D3/04
Inventor 杨建中夏建波
Owner KUNMING METALLURGY COLLEGE
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