Summary of underground hidden coal spontaneous combustion fire source detection methods and prospect of new technologies

doi:10.16265/j.cnki.issn1003-3033.2022.08.0296

Abstract

Abstract:

In order to accurately identify the location and scope of underground hidden high-temperature fire areas, research and development status of the hidden fire source detection technology in coal mines were analyzed based on principles and application overview of current commonly used detection methods (such as thermal infrared detection method, resistivity method, gas detection method, radon measurement method and mathematical understanding algorithm, etc.) and advantages and disadvantages of these detection techniques were compared. The results show that although existing conventional detection methods may detect and delineate hidden fire locations in mined-out areas of coal mines, it is difficult to accurately determine the location and degree of coal spontaneous combustion due to severe impacts of actual environmental factors. Acoustic temperature measurement method, as a mature and effective technology, has been widely used in fields of atmosphere, ocean, and blast furnace temperature measurement. Driven by the concept of cross-discipline integration, and given the demand for hidden fire source detection in goaf, exploring reconstruction method of coal temperature field based on acoustic method will provide new perspectives for the development of precise hidden fire source detection technologies.

Key words: coal spontaneous combustion, hidden fire source, detection method, goaf, acoustic temperature measurement

GUO Jun, LIU Hua, JIN Yan, CAI Guobin, LIU Yin, YANG Panpan. Summary of underground hidden coal spontaneous combustion fire source detection methods and prospect of new technologies[J]. China Safety Science Journal, 2022, 32(8): 111-119.

Figures/Tables 6

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