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A goaf sealing method for preventing coal seam spontaneous combustion

A goaf and coal seam technology, applied in mining equipment, mining equipment, earthwork drilling, etc., can solve problems such as explosion safety accidents, cross-wind oxygen supply, gas combustion, etc. The effect of changing performance and improving economic efficiency

Active Publication Date: 2018-01-12
JIZHONG ENERGY HANDAN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method cannot seal the coal pillars left around the goaf. Therefore, if there is air leakage in the goaf after mining, there is still a safety hazard of coal spontaneous combustion
When multiple coal seams are mined in a short distance, the cracks in the roof and floor of the coal seam will be connected to each other, which will easily cause air flow and oxygen supply. Especially in high gas mines, gas accumulation is easy to form in the goaf of the upper coal seam. Once the coal spontaneously ignites, it is very easy to cause gas combustion or explosion major safety accident

Method used

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  • A goaf sealing method for preventing coal seam spontaneous combustion
  • A goaf sealing method for preventing coal seam spontaneous combustion
  • A goaf sealing method for preventing coal seam spontaneous combustion

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Embodiment Construction

[0011] Such as figure 1 As shown, the present invention comprises the following steps: 1), after the mining face is pushed forward 3-5m from the cutting hole 6, when the top plate has not yet collapsed, the rear part of the hydraulic support 7 of the working face is sequentially returned to the wind from the transport chute 2 Along the channel 1, the support formwork of the super-high water material filling body is erected in sections, and a rectangular space is formed with the reserved coal wall. The sealed filling bag is hung in the space, and then the super-high water material slurry is filled into the filling bag. After the ultra-high water material slurry is solidified, the inner side sealing wall 3 of the goaf 4 is formed 1 ; 2), when the working face is pushed forward every 4-6m, adopt the method of opening 6 places of the cutout in step 1) respectively in the return air chute 1 and the transport chute 2, and make the upper and lower sides of the goaf 4 Sealed Wall 3 ...

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Abstract

The invention relates to a gob sealing method capable of protecting a coal seam from spontaneous combustion. For the peripheral coal wall inside a gob of each stoping working face, a filling strip is built by super high-water material jet-grouted solid prior to the collapse of a top plate to surround the gob, the connection between the gob and the peripheral coal seam is isolated, and a sealed independent unit is formed. The method is simple, and spontaneous combustion phenomena of the coal seam of the gob can be effectively avoided.

Description

technical field [0001] The invention relates to a sealing method for preventing coal seam spontaneous combustion, in particular to a goaf sealing method for preventing coal seam spontaneous combustion. Background technique [0002] Usually, when coal seams prone to spontaneous combustion are mined, preventive yellow mud or fly ash grouting is generally used to treat the goaf in order to prevent spontaneous combustion of the remaining coal in the goaf. That is to use the grouting pipeline from the upper and lower outlets of the working face to pour a layer of slurry on the coal left in the goaf and the caving rocks in the working face, so as to isolate the coal left in the goaf from contact with oxygen, prevent oxidation, and prevent The purpose of coal seam spontaneous combustion. However, the above method cannot seal the coal pillars left around the goaf. Therefore, if there is air leakage in the goaf after mining, there is still a potential safety hazard of coal spontaneo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/103E21F7/00
CPCE21F7/00E21F17/103
Inventor 孙春东丁其全李占涛聂万利赵永强曹彦泽李继升
Owner JIZHONG ENERGY HANDAN MINING GROUP
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