据红外技术网，于2024年04月报道，采空区遗煤自燃红外非接触探测距离研究。
摘要: 采空区遗煤自燃是造成煤矿井下火灾事故的重要原因，受井下采空区实际情况限制，现有探测手段无法直接获得遗煤蓄热自燃的真实情况。
本文利用红外热成像仪的非接触测温特点，通过测温原理分析、实验系统设计和搭建的手段，开展了贴近井下采空区真实环境的FOTRIC348红外热成像仪有效探测距离的测定实验，并进行了井下工程验证。结果表明，区域测温模式、线测温模式和点测温模式中FOTRIC348的有效探测距离分别为8~12 m、10~13 m和9~13 m；井下试验时FOTRIC348的有效探测距离为10~12 m；对上述探测距离取交集，综合判断FOTRIC348红外热成像仪在判断工作面两顺槽采空区遗煤蓄热自燃阶段的有效探测距离为10~12 m。该值的确定可为采空区遗煤自燃防治措施的实施提供针对性的决策依据。
关键词: 红外热成像 / 采空区 / 煤自燃 / 探测距离 / 工程验证
Abstract: The spontaneous combustion of residual coal in a goaf is a major cause of underground fire accidents in coal mines. Owing to the actual situation of underground goafs, existing detection methods cannot directly determine the true situation of residual coal thermal storage and spontaneous combustion. This study utilized the non-contact temperature measurement characteristics of the infrared thermal imager, and through the analysis of temperature measurement principles, experimental system design, and construction methods, conducts an experiment to measure the effective detection distance of the FOTRIC348 infrared thermal imager close to the real environment of the underground goaf, and verifies it in underground engineering. The results show that the effective detection distances of the FOTRIC348 in the regional, line, and point temperature measurement modes were 8 m to 12 m, 10 m to 13 m, and 9 m to 13 m, respectively. The effective detection distance of FOTRIC348 during underground testing was 10 m to 12 m. Based on the intersection of the above detection distances, the effective detection distance of the FOTRIC348 infrared thermal imager for determining the thermal storage and spontaneous combustion stage of residual coal in the goaf of the two parallel grooves of the working face is 10 m to 12 m. Determining this value can provide a targeted decision-making basis for implementing prevention and control measures for spontaneous coal combustion in the goaf.
Key words: infrared thermal imaging / goaf / coal spontaneous combustion / detection range / engineering verification
