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在井下煤自然发火的发现和管理方面,CO/O_2(def)比指的是产生的CO和吸收的O_2的比值,可从井下空风试样的分析值得到,用以考虑各个阶段的指标和氧化的温度。 当自然发火气体被稀释时也能以比值来表示。从发热地点出现的少量空气,被回风巷道的主要风流稀释,因泄出的量不多,可以认为混合后气体的CO/O_2(def)比值比实际值要小。 如果要用CO/O_2(def)比做为氧化温度的指标,那就必须对从稀释以前的发热地点流出来的气体进行研究分析。在采空区插入取样管,从该管可以得到真正的
In the discovery and management of natural coal spontaneous combustion, the CO / O 2 (def) ratio refers to the ratio of CO produced to absorbed O 2, which can be obtained from the analysis of the downhole air-to-air sample to take into account the indicators at each stage And the temperature of oxidation. When the natural gas is diluted can also be expressed as a ratio. The small amount of air that appears from the hot spot is diluted by the main air flow in the return airway. Due to the small amount of leakage, the CO / O 2 (def) ratio of the mixed gas can be considered to be smaller than the actual value. If the CO / O 2 (def) ratio is to be used as an indicator of the temperature of the oxidation, it is necessary to conduct a study on the gas flowing out of the place of dilution before the dilution. Insert a sampling tube in the goaf to get real from the tube