Infrared detecting method for concealed fire spot of self-ignition coal in coal tunnel

A technology for infrared detection and spontaneous combustion of coal, used in radiation pyrometry, measuring heat, measuring devices, etc.

Inactive Publication Date: 2002-12-04
YANKUANG GRP CO LTD +1
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Problems solved by technology

In China, infrared detectors and infrared thermal imagers are mainly used in coalfield geological surveys, geological structure judgments, earthquake predictions, groundwater detection, etc., and have not been used to detect the spontaneous combustion temperature and position of coal walls and coal pillars.

Method used

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  • Infrared detecting method for concealed fire spot of self-ignition coal in coal tunnel
  • Infrared detecting method for concealed fire spot of self-ignition coal in coal tunnel

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Embodiment Construction

[0045] The infrared detection method of the present invention is carried out during the excavation of the coal roadway and the formation and advancement of the working face. After the coal roadway is excavated, the entire coal roadway can be detected, and the background infrared radiation intensity is given; the easy-to-oxidize section is found through infrared detection, and then through further detection, especially the key detection of the easy-to-oxidize section, the coal mine is found out. For the abnormal temperature section of the concealed fire source in the alley, the position and temperature of the concealed fire source point are calculated by inverting the heat conduction equation from the measured data.

[0046] Now take the infrared detection of the hidden fire source point along the trough of the 4308 track in Nantun Coal Mine as an example to illustrate. The 4308 track is along the trough of Nantun Mine 13 上 03 The track trough of the working face, the upper pa...

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Abstract

The invention relates to an infrared detection method for the hidden fire source point position of coal spontaneous combustion in coal mines, which is used for short-distance detection and prediction of coal spontaneous combustion in underground coal mines. By arranging measuring points in the coal roadway, measuring the infrared radiation energy field strength of the measuring points, finding out the easily oxidized area of ​​the coal roadway and the abnormal temperature area of ​​the concealed fire source, by analyzing the two-dimensional unsteady state of the loose coal body in the coal roadway. The heat conduction equation of the heat source is reversed and solved to determine the location of the concealed fire source. Infrared detection does not need to touch the measured object, is less affected by underground factors, and has high sensitivity, which can realize early prediction and prediction of coal spontaneous combustion in coal roadway; simple operation, rapid detection, convenient underground application, and low detection cost.

Description

Technical field [0001] The invention relates to coal spontaneous combustion detection technology in underground coal mines, in particular to an infrared detection method for detecting the concealed fire source position of coal spontaneous combustion in coal roadway at close range. Background technique [0002] In the existing technology, the methods commonly used at home and abroad to detect hidden fire sources of coal spontaneous combustion include magnetic detection, resistivity detection, radon gas detection, index gas detection, combined temperature measurement with temperature measuring instruments and temperature sensors, and infrared detection method, etc. The magnetic detection method, resistivity detection method and radon gas detection method are mainly suitable for the occasions where the fire source is closed and the temperature of the fire source is high, and the accuracy is good, but they are powerless for the high-temperature area with a temperature ≤ 100 °C i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/00G01J5/00G01J5/54G01K11/00G01N21/71
Inventor 崔洪义程卫民王振平陈平刘守华张广文陶云春夏孝民吕子清
Owner YANKUANG GRP CO LTD
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