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End component of nitrogen injection pipeline of gob of mine

A goaf and pipe end technology, which is applied in the field of end components of nitrogen injection pipelines in goafs, can solve problems such as blockage of nitrogen injection pipelines in goafs, poor nitrogen injection effect, damage, etc. Space, easy to manufacture, and beneficial to the effect of nitrogen diffusion

Inactive Publication Date: 2015-08-19
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of blockage and damage of the nitrogen injection pipeline in the goaf and poor nitrogen injection effect, the present invention provides an end component of the nitrogen injection pipeline in the goaf

Method used

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  • End component of nitrogen injection pipeline of gob of mine
  • End component of nitrogen injection pipeline of gob of mine
  • End component of nitrogen injection pipeline of gob of mine

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Embodiment Construction

[0014] The end components of the nitrogen injection pipeline in the goaf of the mine, such as figure 1 , figure 2 As shown, it includes nitrogen injection pipe 1, steel cage 2, nitrogen injection pipe end 3, nitrogen injection pipe air outlet 4 and crossties 5. Spiral air outlet 4 is made on the length of 1m at the end of nitrogen injection pipe 1 to form nitrogen injection " "Flower tube", in which the hole diameter of the air outlet 4 is 20mm, the hole spacing is 0.2m, and the helix angle is 120°; the steel cage 2 is buckled on the flower tube section as a protective cover, which is 1.2m long, 0.25m wide, and 0.4m high, and the steel cage 2 They are 0.05m longer than both ends of the flower tube respectively; the nitrogen in the nitrogen injection pipe 1 escapes from the end 3 of the nitrogen injection pipe and the air hole 4 of the nitrogen injection pipe, and diffuses to the goaf; the crossties 5 lift the nitrogen injection pipe a certain distance from the ground.

[001...

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Abstract

The invention relates to an end component of a nitrogen injection pipeline of a gob of a mine. The end component is characterized in that a certain quantity of gas outlet holes are spirally formed in the side walls of the tail end of a nitrogen injection pipe by means of perforation, the common nitrogen injection pipe is modified to obtain a nitrogen injection perforated pipe, the nitrogen injection 'perforated' pipe is lifted away from the ground by a certain altitude, and the end component is additionally provided with a protection cover which is a reinforcement cage. The end component has the advantages that the unique gas outlet holes can be effectively prevented from being blocked by water, coal and / or gangue dust and gangue mixtures, the tail end of the nitrogen injection pipeline can be prevented from being smashed, compressed and damaged by falling gangue, the condition that gas is exhausted by a single hole of an existing nitrogen injection pipeline can be changed, nitrogen diffusion regions of the gob can be increased, the nitrogen diffusion uniformity of the gob can be improved, nitrogen can cover oxidation temperature rise regions in the gob to a great extent, and potential safety hazards due to spontaneous combustion of the coal in the gob can be prevented.

Description

technical field [0001] The invention relates to a goaf nitrogen injection device, in particular to a goaf nitrogen injection pipeline end component. Background technique [0002] Nitrogen is an inert gas, neither burns nor participates in combustion, and has a slightly lower density than air. These physical characteristics make nitrogen injection into goafs one of the important technical measures to prevent spontaneous combustion in goafs. The injected nitrogen can reduce the air leakage volume of the working face goaf, reduce the temperature of the goaf, and inhibit the oxidation and exothermic reaction of the remaining coal. Usually, the nitrogen injection pipes used in mines are steel wire winding pipes with limited strength, and the gangue falling in the goaf is easy to crush and even damage the nitrogen injection pipes, resulting in poor ventilation and greatly reducing the amount of nitrogen injection in the goaf; ordinary The nitrogen injection pipe has only one outl...

Claims

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Application Information

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IPC IPC(8): E21F5/00
CPCE21F5/00
Inventor 朱现磊杨仁树朱现峰王国栋李清海徐西春李国营李长江
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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