Quantitative Analysis and Study of Coal Mine Underground Environment Gases Based On the FTIR

摘要

Coal mine underground environment gases gas composition is very complicated, especially coal self-ignition different oxidation stage symbol of mine gas and release of period of reckoning produce of the coal mine enterprises poisonous and harmful gas production safety, caused great harm to the mine production period and needed after the reckoning mine air composition for monitoring. Existing gas chromatographic analysis is slow and not on-line analysis problem, sensor use short-lived, need often set-up insufficient, we put forward such a kind of brand-new based on the Fourier transform infrared spectrometer (FTIR) in-well environment gas analysis method. Combining with gas absorption spectral characteristics and analysis from spectrometer parameter selection, request the sample gas preparation, feature extraction and analysis model is established in variable introduces a set of effective coal mine underground environment gas spectral analysis method, and then gives C_2H_6, C_3H_8, CH_4, i-C_4H_10, n-C_4H_10, C_2H_4 C_3H_6, C_2H_2, SF_6, CO and CO_2, the test results. The results showed that the FTIR spectrometer in spectral resolution for 1 cm~(-1), optical path for 10 cm circumstances, all gas resolution than 2×10~(-6), meet mine environment gas detection requirements. This shows that the infrared spectrum analysis is a potential mine environment gas analysis, this paper party could realize technology of coal mine underground environment gas on-line analysis.