Coal Engineering ›› 2020, Vol. 52 ›› Issue (3): 108-112.doi: 10.11799/ce202003022

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Research on the mark gas of coal spontaneous combustion in Hunchun area

  

  • Received:2019-08-30 Revised:2020-03-04 Online:2020-03-10 Published:2020-05-11

Abstract: In order to explore the spontaneous combustion of coal in the high-gas mine in Hunchun area, four coal seams of Banshi 22, 23a and Baliancheng 18# and 26# were selected for the programmed temperature characteristic experiment. The variation rule of CO and hydrocarbon gas production with temperature was analyzed, the indicator gas index of spontaneous combustion was optimized, and the critical temperature of coal spontaneous combustion was calculated. The results show that the critical temperature of spontaneous combustion at Banshi 22, 23a and Baliancheng 18# and 26# is 101.0℃、97.6℃、121.0℃、169.1℃. CO and C2H4 are taken as the main reference indexes for the prediction and forecast of coal spontaneous combustion, supplemented by other hydrocarbon gases, chain-alkane ratio and olefin ratio with good regularity.

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