火源探测是对煤层自然发火位置与范围的确定。由于煤层自燃火源有较强的隐蔽性，探测原理均是测量煤自燃过程中其本身及周围介质的物理或化学变化的变化量，以此作为判别指标来确定自燃程度和范围。本课题利用物体的温度不同红外辐射量场也不同的原理，运用红外成像技术探测疑似自燃煤体以及周边岩体，从而确定自燃的性质及范围，为自燃危险区预测预报和火区综合治理提供强有力的辅助手段。 本文从红外辐射和煤体热量积聚理论出发，提出了用红外成像技术来检测煤自燃区域或自燃危险区域的方法。根据红外探测技术的原理结合煤矿的特殊应用环境，确定红外成像仪的具体技术参数，选择适合煤矿使用红外成像仪；再通过分析煤矿尤其是井下特殊环境可能对红外热成像仪造成的影响，将环境影响可能造成的误差降到最小；最后，提出了巷道自燃发火隐患探测与识别、煤自燃火灾识别及火区治理效果检验和浅部煤田火区勘察三项应用技术，并总结了三项技术应用的一般规律，为其今后应用方法的完善和应用领域的扩展奠定了基础。 现场应用结果表明：应用红外成像技术可定性判断巷道自燃隐患，预报自燃火灾的产生。在煤自燃火灾综合治理中，能够根据火区表面煤岩体温度场和钻孔内温度探测对火区范围和自燃程度进行定性和定量的判断，根据红外成像探测结果制定火区治理方案并进行效果检验；结合GPS技术和测氡技术可对浅部煤田火区范围进行勘察。实践证明红外成像探测技术可应用于煤层隐蔽火灾防治工作中。

Detecting of fire source is to determine the location and area of spontaneous combustion fire. Because fire source has very obvious concealment, and it's detecting principle is measuring the physical or chemical variable quantity of coal body or its surrounding medium during spontaneous combustion of coal, so we can use this to determine the location and area spontaneous combustion fire. This paper makes use of the principle of different temperature has different IR(infrared ray) radiation field for object, and uses IR imaging detecting technique to detect suspected coal body and its surrounding rock, so as to determine the character and area of spontaneous combustion coal body. This will be provide powerful assistant measure for predicton of spontaneous combustion risk and comprehensive treatment of fire area in coal mine. Starting from the theory of IR radiation, the paper brings forward the method which is uses IR imaging detecting technique to detect spontaneous combustion area and risky area, according to the risk of spontaneous combustion and the characteristic of temperature field distribution owing to temperature difference between high temperature coal body and surrounding rock. Thus, the paper determines the practical technical parameters of thermoviewer and chooses suitable thermoviewer for coal mine according to the principle of IR detecting technique and special environment of coal mine. After that, reduce the possible error from environment influence by analyseing the possible influence for thermoviewer from special underground environment. Finally, the paper puts forward three techniques: the hazard detecting and identifying of spontaneous combustion of laneway, fire identifying of spontaneous combustion and treatment effect testing of fire area, and summarizes the commonly rules of them. The research establishes the basis of method perfection and application field extension. The site application result shows that IR imaging technique can be used to determine spontaneous combustion hazard of laneway and predict the occurrence of fire. During the process of comprehensive treatment of spontaneous combustion fire, we can make a qualitative and quantitative judgment for fire area and degree of spontaneous combustion based on temperature field of coal and rock body of fire area, as well as establishes the measures of fire treatment and makes testing on the effect based on the result of IR imaging detecting. Combining GPS technique with radon-measuring technique can make exploration on fire area of coalfield. The practice has proved that IR imaging detecting technique can be used to preventing and controlling working of hidden fire of coal seam.