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Gas controL method for air return corner of fuLLy-mechanized caving face

A corner and gas technology, which is applied in the field of gas control in the return air corner of the fully mechanized caving face, can solve the problems of high gas concentration and the inability to effectively control the gas in the return air corner of the coal mining face.

Inactive Publication Date: 2018-11-23
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventor found in the process of realizing the present invention that the above-mentioned gas control measures cannot effectively control the gas in the return air corner of the coal mining face, and the gas concentration is still relatively high

Method used

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  • Gas controL method for air return corner of fuLLy-mechanized caving face
  • Gas controL method for air return corner of fuLLy-mechanized caving face
  • Gas controL method for air return corner of fuLLy-mechanized caving face

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Effect test

Embodiment 1

[0023] figure 1 Shows the flow chart of the method for controlling gas at the return wind corner of a fully mechanized caving face according to an embodiment of the present invention. Such as figure 1 As shown, the method for controlling gas in the return air corner of a fully mechanized caving face provided by the embodiment of the present invention is suitable for the face of inclined longwall coal mining, especially the face of coal mining where high gas and rock bursts are intertwined.

[0024] The embodiment of the present invention provides a method for controlling gas at the return wind corner of a fully mechanized caving face, which includes:

[0025] S110, in the craft lane, within the first predetermined distance of the advance coal mining face, construct at least one set of first high-level drilling to the goaf above the return air corner;

[0026] The first high-level drilling is constructed in the craft lane, and the first high-level drilling is an oblique hole. The fir...

Embodiment 2

[0036] On the basis of the above-mentioned embodiment 1, optionally, S110, in the process roadway, within the first predetermined distance of the advance coal mining face, before the construction of the first high-level drilling to the goaf above the return air corner includes:

[0037] Blast all the pre-split holes within the first predetermined distance of the advanced coal mining face in the craft lane.

[0038] By blasting all the pre-split holes in the first predetermined range of the advanced coal mining face, the impact on the surrounding rock during the first high-level drilling can be reduced for better construction.

[0039] Preferably, S130, in the return air trough, within the second predetermined distance from the end cut top line, the construction of the second high-level drilling to the return air corner roof crack zone includes:

[0040] Perform end-cutting blasting on the end roof plate within the second predetermined distance from the end-cutting line in the return wi...

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Abstract

The embodiment of the invention discLoses a gas controL method for an air return corner of a fuLLy-mechanized caving face. The method comprises the steps that in a process roadway, one or more sets offirst high-position driLLing hoLes are constructed to a goaf above the air return corner within a first predetermined distance range of an advanced coaL mining working face; the first high-position driLLing hoLes are connected with a pumping and reLeasing pipeLine in the process roadway separateLy, and gas is pumped and reLeased; in an air return Laneway, second high-position driLLing hoLes are constructed to a top pLate fissure zone of the air return corner within a second predetermined distance range from an end top cutting Line; the second high-position driLLing hoLes are connected with insertion pipes of the air return corners, and the gas is pumped and reLeased. By means of the embodiment, the gas pumping and extracting concentration and rate can be increased, the gas of the air return corner is effectiveLy controLLed, and the gas concentration is reduced.

Description

Technical field [0001] The invention relates to the technical field of coal mines, in particular to a method for controlling gas at the return air corner of a fully mechanized caving face. Background technique [0002] my country is now in a special historical period of industrialization, urbanization, and modernization. The national economic construction has a huge demand for energy. Coal is my country’s main energy resource. It has accounted for more than 70% of total energy consumption for a long time. Some important basic industrial sectors are highly dependent on the production and supply of coal, which constitutes my country’s unique economic development form relying on coal. Industry carries the historical responsibility of economic development, social progress and national rejuvenation. Coal mine safety work is the top priority of the country’s industrial safety work. Gas disasters are one of the most serious disasters in coal mines in our country, which severely restrict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 杨伟赵南方杨贵儒薛冰张立魁常博赵凯褚新龙曹志刚
Owner CHNA ENERGY INVESTMENT CORP LTD