Research On The Inversion Technique Recognition Of Hidden Fire Source In Coal Seam Based On Infrared Imaging Exploration

Detection of Underground Coal firing is to measure the combustion space andcombustion intensity of underground coal burning, as well as the resource environmentalhazard it causes by various kinds of modern detection techniques, achieving qualitativeunderstanding at fixed position and time of underground coal burning spatial and timevariation process. The spatial and time variation process of underground coal burningdevelopment is continuing and during the variation, the physical and chemical fields also havesynchronous changes as geology of burning area changes fast this task, with the utilization oftechnique of infrared imaging, the principle that the radiant quantity field of an object can bedifferent as the temperature changes, as well as the equation of three-space dimensional heatconduction, confirms the strength and location of Coal spontaneous combustion fire,providing an efficient auxiliary technique for spontaneous combustion danger prediction andcomprehensive treatment of burning area.Starting with the influential factors of infrared radiation, coal combustion and the theoryof heat transfer, the thesis has put forward theoretical guidance for reflecting the location andstrength of inner fire by the means of infrared imaging technology. According to the regularityon combustion phenomenon of coal bed and its occurrence and process, influence fromsurrounding conditions and basic ways, the experimental model for infrared-imagingexploration of hidden fire source has been established. Furthermore, through the study andanalysis of the change rules on three-dimensional thermal physical field, the location andstrength of inner combustion source in coal bed has been obtained. At last, it is the twopractical technologies of the way to inverse identification for hidden combustion sourcethrough infrared imaging, and the exploration and identification for hidden danger of tunnelcombustion that has been proposed to lay the foundation for perfection of application methods and the expansion of its area in future.Experimental result shows that applying infrared imaging technique in the research ofhidden fire source in coal seam can qualitatively judge hidden danger of spontaneouscombustion on roadway, and predict the spontaneous fire accidents. The conclusion drew bythe changes in the IrT Infrared Thermogram reflected by the experiment has illustrated thatinfrared imaging exploration is a better way of temperatures measure. HRVIR can reveal thewhole temperatures distribution on the surface to visually reflect the position of hightemperature point on part of the surface. When the coal body is well-distributed, it can beconcluded that the interior heat.Source is located below the surface high temperature point to provide scientific evidencefor the technology of inverting hidden combustion source.