近巷高温区域红外探测与反演

为准确检测、判定近巷煤体高温点或火源,实现矿井快速防灭火,利用高温点的热效应,依据传热学相关理论,建立了近巷煤体内部高温点反演算法。利用红外热像仪探测了某矿巷道壁面温度场,结合测试地点风流温度,推算了煤体内部高温点深度和温度。结果表明,探测的近巷高温点主要在距离巷道表面约0.09~0.15 m深度以内的范围,煤体内部最高温度达到了70℃左右。根据这一结果,采取了针对性的防灭火措施,气体观测结果显示,高温点的CO气体浓度由最初的100×10-6~160×10-6快速降至了10×10-6左右。可见,红外热像反演方法可以确定近巷煤体的高温点。

Detecting and inversing high temperature area of near roadway with infrared thermal imaging

In order to detect and determine high temperature area or fire point in near roadway coal，and preventing it，heat effect and heat conduct theory was used，so the method of inversing high temperature area of near roadway was presented.Based on coal wall temperature field，which was detected by thermal infrared imager，and airflow temperature，the depth and the highest temperature of coal spontaneous spot was calculated.On the test sites，the depth of the highest temperature spot is not more than 0.09-0.15 m，and the temperature is below 70 ℃.And the pointed measurements which cause CO content decrease from 100×10-6-160×10-6 to 10×10-6 were used.Therefore，the method of inversing high temperature with infrared thermal imaging can be used to detect the high temperature spot of coal spontaneous near roadway.