测氡法和红外热成像法在小窑区火源位置探测的综合应用

发布时间：2018-04-30 22:15

本文选题：测氡法 + 红外热成像法　；参考：《西安科技大学学报》2015年05期

【摘要】：为了研究红外热成像法和测氡法联合探测技术在探测上覆煤层小窑区自然发火火源位置的应用效果。采用理论分析和现场实测相结合的方法,首先,分析了2种方法在实践应用中的优缺点;其次,研究了自燃煤层释放氡在裂隙岩体中的运移和扩散规律,同时建立了自燃火源传热模型,分析了红外热成像法的探测机理;最后,以公乌素煤业有限责任公司1604工作面上覆9#煤层小窑火区为现场探测对象,综合采用RAD7专业电子测氡仪和T335型红外成像仪对火源位置及其范围进行了探测。研究表明:在测氡法中,裂隙岩体中任意位置处的氡气浓度均可由岩体表面氡气浓度通过理论计算得出,但氡的扩散系数及衰减常数等参数受地形变化影响差异很大,不易确定;而红外热成像探测深度一般为10 m左右,火源位置越深,探测难度越大;现场氡气浓度测试及红外热成像方法探测结果显示在1604工作面上部地表存在2个氡异常区域,且两区域的位置与红外热成像探测结果相符。总体而言,红外热成像法和测氡法联合使用可以互补缺陷,可确保火源位置的进一步精确定位,对火区的治理方案提供科学依据。
[Abstract]:In order to study the application effect of the infrared thermal imaging method and the combined detection technology of radon method in detecting the natural ignition source position of the small kiln area of the coal seam, the advantages and disadvantages of the 2 methods in the practical application are analyzed by the combination of theoretical analysis and field measurement. Secondly, the radon release from the spontaneous combustion coal seam is studied in the fractured rock mass. At the same time, the heat transfer model of spontaneous ignition source is established and the detection mechanism of infrared thermal imaging method is analyzed. Finally, the small kiln fire area of the 9# coal seam overlying 9# coal seam on the Gong Wu Su coal industry limited liability company is the field detection object, and the location and range of the fire source is synthetically adopted by the RAD7 professional electronic radon meter and the T335 infrared imager. The study shows that in the radon method, the radon concentration at any position in the fractured rock mass can be calculated by the theoretical calculation of the surface radon concentration of the rock mass, but the diffusivity and attenuation constant of the radon are very different and are not easily determined, and the detection depth of infrared thermal imaging is generally about 10 m, and the source position of the fire is the source of the radon. The more difficult the detection is, the more difficult the detection is, the results of the field radon concentration test and the infrared thermal imaging method show that there are 2 abnormal radon areas on the upper surface of the 1604 working surface, and the location of the two region is in accordance with the infrared thermal imaging detection results. Further precise positioning will provide a scientific basis for fire control plan.

【作者单位】：辽宁工程技术大学安全科学与工程学院;煤科集团沈阳研究院有限公司;
【分类号】：TD752.2

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