Super-large-diameter coal seam drilling pipe insertion goaf gas extraction technology

A super-large-diameter, large-diameter technology, which is applied in the field of gas technology in super-large-diameter coal seam drilling and intubation to extract gobs, and can solve problems such as difficult management, gas exceeding the limit, and air leakage.

Inactive Publication Date: 2016-12-14
山西汾西中兴煤业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, when arranging the working face to extract gas from the goaf, the connection lane is often used to make the connection roadway, and the connection roadway is sealed, and the pipe is inserted for drainage. Since the connection river is built at a certain distance, the number is ...

Method used

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  • Super-large-diameter coal seam drilling pipe insertion goaf gas extraction technology
  • Super-large-diameter coal seam drilling pipe insertion goaf gas extraction technology
  • Super-large-diameter coal seam drilling pipe insertion goaf gas extraction technology

Examples

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no. 1 example

[0020] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a super-large-diameter coal seam borehole intubation pipe drainage gob gas process, characterized in that: ① A measure lane 5 is constructed after a protective coal pillar 11 is left on the side of the return airway 3, and a scraper conveyor is installed in the measure lane 5 13. Drill several large-diameter boreholes 6 on the protective coal pillar 11 left in the coal seam 9 with a large-diameter auger drilling machine to the upper corner of the air return roadway 3 from the measure lane 5, and insert them into the large-diameter borehole 6. The drilling casing 14 is connected to the drainage pipeline 7 to perform gas drainage for the gas in the goaf 4 .

no. 2 example

[0022] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a super-large-diameter coal seam borehole intubation pipe drainage gob gas process, characterized in that: ① A measure lane 5 is constructed after a protective coal pillar 11 is left on the side of the return airway 3, and a scraper conveyor is installed in the measure lane 5 13. Drill several large-diameter boreholes 6 on the protective coal pillar 11 left in the coal seam 9 with a large-diameter auger drilling machine to the upper corner of the air return roadway 3 from the measure lane 5, and insert them into the large-diameter borehole 6. The drilling casing 14 is connected to the drainage pipeline 7 to perform gas drainage for the gas in the goaf 4 .

[0023] Among them: ②When the current mining face 1 is finished, the measure lane 5 is set as the air inlet roadway 2, all the current large-diameter boreholes 6 are closed, and a return air roadway 3 is constructed, and the step ① is repeated to realiz...

no. 3 example

[0025] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a super-large-diameter coal seam borehole intubation pipe drainage gob gas process, characterized in that: ① A measure lane 5 is constructed after a protective coal pillar 11 is left on the side of the return airway 3, and a scraper conveyor is installed in the measure lane 5 13. Drill several large-diameter boreholes 6 on the protective coal pillar 11 left in the coal seam 9 with a large-diameter auger drilling machine to the upper corner of the air return roadway 3 from the measure lane 5, and insert them into the large-diameter borehole 6. The drilling casing 14 is connected to the drainage pipeline 7 to perform gas drainage for the gas in the goaf 4 .

[0026] Among them: ②When the current mining face 1 is finished, the measure lane 5 is set as the air inlet roadway 2, all the current large-diameter boreholes 6 are closed, and a return air roadway 3 is constructed, and the step ① is repeated to realiz...

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Abstract

The invention relates to a super-large-diameter coal seam drilling pipe insertion goaf gas extraction technology. The technology is characterized by the steps that a measure roadway is constructed behind protection coal pillars reserved on the side of a gas return roadway, a scraper conveyor is arranged on the measure roadway, multiple large-diameter drill holes are drilled from the protection coal pillars reserved in a coal seam to the corners of the gas return roadway through the measure roadway and a large-diameter spiral drilling machine, a drill hole casing pipe is inserted into each large-diameter drill hole, the drill hole casing pipes are connected with an extraction pipeline, and then gas extraction is conducted on the casing pipe; the measure roadway is set to be a gas inlet roadway of a next stoping face after being used, one roadway is used for two purposes, the construction amount of the protection coal pillar roadway is reduced, a roadway flow and a connection roadway are omitted, no collapse hole can occur due to usage of the drill hole casing pipes, a part of the drill hole casing pipes can be recycled and reused, and it is guaranteed that the gas dose not leak; meanwhile, investment is saved, management is easy, the extraction effect is improved, and complete mechanization of the whole coal mining engineering process and auxiliary process is achieved.

Description

technical field [0001] The invention relates to a process and method for gas drainage in a goaf, in particular to a technique for extracting gas in a goaf with a super-large-diameter coal seam borehole insertion pipe. Background technique [0002] Coal occupies a dominant position in my country's energy composition. However, the environment of coal production is extremely harsh, and major disasters and accidents occur frequently. Among them, the gas disaster is one of the main forms of coal mine disasters in my country. With the continuous improvement of fully mechanized mining technology, the advancing speed of the working face is accelerating, and higher and higher requirements are put forward for the gas control of the large fully mechanized mining face with high gas emission. From the perspective of gas sources, the proportion of goaf gas in the gas emission of working faces is increasing. In order to control the gas in working faces, some mines adopt multi-lane layout...

Claims

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Application Information

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IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 张兴华张柏林王海东年军黄玉玺乔晓光张家行王军
Owner 山西汾西中兴煤业有限责任公司
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