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Goaf coal spontaneous combustion dangerous area judgment method based on gas continuous online monitoring

A technology for dangerous areas and judgment methods, which is applied to the analysis of gas mixtures, measuring devices, instruments, etc., can solve the problem of low reliability of coal spontaneous combustion "three zones", achieve the effect of convenient operation, and improve reliability and accuracy

Pending Publication Date: 2022-01-11
XUZHOU UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, affected by geological occurrence, mining conditions, ventilation and other factors, only a fixed O 2 The reliability of coal spontaneous combustion "three zones" divided by concentration is low, and this method cannot be widely applied to more working faces

Method used

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  • Goaf coal spontaneous combustion dangerous area judgment method based on gas continuous online monitoring
  • Goaf coal spontaneous combustion dangerous area judgment method based on gas continuous online monitoring
  • Goaf coal spontaneous combustion dangerous area judgment method based on gas continuous online monitoring

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The method for judging the coal spontaneous combustion dangerous area in the goaf based on the continuous on-line gas monitoring of the present invention is described in detail by taking the 401103 working face of the Hujiahe Coal Mine in Binchang, Shaanxi as an example.

[0029] Specifically, the gas samples collected by bundle tubes of four groups of brackets (No. 55, No. 60, No. 70 and No. 80), the corresponding O 2 concentration as an example to analyze it in detail.

[0030] Step 1. According to the site conditions, arrange the gas sampling bundle tube behind the support of the working face, such as figure 1 shown.

[0031] Step 2, using the bundle tube automatic sampling device and monitoring system to collect gas in the goaf, and analyze the oxygen concentration.

[0032] Step 3. Taking the length of the gob as the abscissa and the oxygen concentration as the ordinate, use origin 8.5 software (Origin Lab, USA) to draw the cloud map of the nuclear density distri...

Embodiment 2

[0037] The method for judging the coal spontaneous combustion dangerous area in the goaf based on the continuous on-line gas monitoring of the present invention is described in detail by taking the 401101 working face of Mengcun Mine, Binchang, Shaanxi as an example.

[0038] Specifically, the gas samples collected by bundle tubes of three groups of brackets (No. 30, No. 60, and No. 90) correspond to O 2 concentration as an example to analyze it in detail.

[0039] Step 1. According to the site conditions, arrange the gas sampling bundle tube behind the support of the working face, such as figure 1 shown.

[0040] Step 2, using the bundle tube automatic sampling device and monitoring system to collect gas in the goaf, and analyze the oxygen concentration.

[0041] Step 3. Taking the length of the gob as the abscissa and the oxygen concentration as the ordinate, use origin 8.5 software (Origin Lab, USA) to draw the cloud map of the nuclear density distribution of the gas behi...

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Abstract

The invention discloses a goaf coal spontaneous combustion dangerous area judgment method based on gas continuous online monitoring. The goaf coal spontaneous combustion dangerous area judgment method comprises the following steps: laying a plurality of sets of gas sampling beam tubes in a goaf behind a stope face support; using a beam tube automatic sampling device and a monitoring system for collecting goaf gas, and carrying out oxygen concentration analysis; drawing a nuclear density distribution cloud chart of gas behind different brackets of the working face by taking the length of the goaf as an abscissa and the oxygen concentration as an ordinate; adding a section line on the nuclear density distribution cloud picture to obtain a peak value of nuclear density distribution and a goaf position corresponding to the peak value; and performing regional division on the goaf according to the goaf position corresponding to the peak value to obtain final distribution of the goaf coal spontaneous combustion dangerous region. According to the method, the gas concentration of the goaf and the change condition of the gas concentration can be detected, the coal spontaneous combustion dangerous areas can be accurately divided according to the gas concentration, the danger degrees of different areas of the goaf are determined, and therefore coal spontaneous combustion disasters can be prevented.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a method for judging coal spontaneous combustion dangerous areas in goafs based on continuous on-line gas monitoring. Background technique [0002] Underground coal mines, coal spontaneous combustion is one of the main disasters affecting the safe recovery of working faces. Coal spontaneous combustion is an external manifestation of the physical and chemical reactions between coal and oxygen. Air leakage in goafs cannot be avoided. Therefore, coal left in goafs is always in an oxidized state, which is an area where spontaneous coal combustion occurs frequently. But coal is oxidized to different degrees in different regions, and therefore dangerous. In order to better prevent coal spontaneous combustion, it is necessary to classify coal spontaneous combustion hazard areas in gobs. [0003] The temperature measurement method and the marker gas analysis method are the two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N33/00
CPCG01N1/22G01N33/0004
Inventor 郭庆任万兴贾慧霖石晶泰郭津伯李玉鹏黄靖维孙振国
Owner XUZHOU UNIV OF TECH
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