Content area
Full text
ABSTRACT: Coal combustion not only results in loss of coal resources and water resources, forest fire, environmental pollution, but also directly causes serious consequences of death. In order to grasp the region of fire area of roadway roof coal and the trend of change on fire area, this paper introduces the basic principle of infrared thermal imager, combined with continuous observation of the region of coal spontaneous combustion at the 9209 working face in a coal mine in northern China, demarcates the range of surface temperature of the fire area, analyzes the temperature change trend of fire area, summarizes and introduces the precautions on the application of infrared thermal imager in observing the region of coal spontaneous combustion. Research results show that infrared thermal imager can be used to demarcate high temperature area of roadway roof coal, locate surface high-temperature area, and speculate that fire combustion status and development trend. Therefore, application of infrared thermal imager is very important to identify the condition of fire area, demarcation and management of fire area.
KEYWORDS: Coal spontaneous combustion, Fire area, Infrared thermal imaging, Roadway roof coal, High temperature spot
(ProQuest: ... denotes formulae omitted.)
1 INTRODUCTION
With the continuous development of infrared physics and technology, infrared detection has been widely used in safety production in coal mine, for example, thermal imager can be used in underground coalmine production to observe breaking condition of coal seam roof and floor, in order to timely observe cracks and dangerous rock, and observe coal spontaneous combustion, etc. Temperature measurement by using infrared thermal imager is of non-contact type which has the following advantages: high speed, does not destroy the temperature field distribution of measured object, detecting the target which cannot be contacted. Theoretically, in any occasion when temperature detection is needed, the application of infrared thermal imager in underground mine fire detection is becoming more and more mature. Coal spontaneous combustion is one of the serious disasters in coal mine production process, and it restricts safe and efficient production of working face. Among state-owned key coal mines in China, more than 56% have the risk of spontaneous combustion [1]. Due to underground geological structure complexity, air leakage, coal spontaneous combustion tendency, and other factors, spontaneous combustion fire is strongly hidden...