Mining method for treating upward pinch-out of inclined thin ore body

A mining method and thin ore body technology, which is applied to the mining field where thin ore bodies gradually pinch out upwards, can solve problems such as large mining and cutting engineering volumes, and achieve the goals of improving safety, reducing mining and cutting engineering volumes, and increasing production capacity Effect

Inactive Publication Date: 2012-03-28
CHINA NERIN ENG
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a mining method for dealing with the upward pinch-out of inclined thin ore bodies, which overcomes the disadvanta

Method used

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  • Mining method for treating upward pinch-out of inclined thin ore body
  • Mining method for treating upward pinch-out of inclined thin ore body
  • Mining method for treating upward pinch-out of inclined thin ore body

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Embodiment Construction

[0010] The embodiment of the inventive method is described in detail below:

[0011] An embodiment of an upward pinch-out mining method for processing inclined thin ore bodies:

[0012] The ore block composition is arranged along the strike, with a length of 50m, a height of 50m in the middle section, and a height of 3m for the top column. When the upper return air tunnel does not need to be preserved and the surrounding rock is stable, and safety conditions permit, the top column may not be retained. The height of the base column is 4m, and the width of the inter-columns is 6m.

[0013] The mining and cutting work mainly includes the transportation roadway 3, the mining standard shaft 4, the electric rake road 2, the ore-drawing short chute 1, the funnel 5 and the bucket wear 7 during the excavation stage; the cross-section of the transportation level roadway 3 in the stage is 2200mm×2500mm; 4 section is 2×2 m 2 , the cross-section of electric rake road 2 is 2×2 m 2 A shor...

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Abstract

The invention provides a mining method which has a small mining work amount and is easy and convenient for ore removal specific to the situation that a complete ore block cannot be formed in a region where upward pinch-out of an inclined thin ore body occurs. The mining method mainly comprises the following steps of: digging a short ore drawing jack shaft upwardly on one side of a travelling roadway; digging an electric rake road along the lateral trending direction of a foot wall of the ore body; digging funnel through holes of 1 meters on the electric rake road at the intervals of 5 meters; digging ore collecting funnels from the funnel through holes; and enlarging the funnels into a funnel shape, and forming undercutting and raise to complete major mining and cutting work. Ore automatically flows into the electric rake road through the ore collecting funnels, is raked into the short ore drawing jack shaft through an electric rake, and is intensively raked into the short jack shaft through the electric rake road, so that the length of a funnel neck can be reduced effectively, the accurate mining work amount is reduced, and a better economic benefit is achieved.

Description

technical field [0001] The invention relates to a mining method, in particular to a mining method for dealing with thin ore bodies gradually pinching out upward. Background technique [0002] The shallow hole ore retention method is generally used for thin ore bodies that are inclined, extremely inclined, and the surrounding rock conditions of the upper and lower walls are good. Generally, the cutting volume is small and the capacity is relatively small. But along the pinch-out direction of the ore body, it cannot become a complete ore block. The total ore block ore volume is relatively small, and the same amount of mining and cutting work needs to be completed before it is possible to mine the ore of the entire ore block. Contents of the invention [0003] The purpose of the present invention is to provide a mining method for dealing with upward pinch-out of inclined thin ore bodies, which overcomes the disadvantage of large mining and cutting work of incomplete ore b...

Claims

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Application Information

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IPC IPC(8): E21C41/22
Inventor 方兆良
Owner CHINA NERIN ENG
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