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WU Fusheng. Experimental study on composite gas indexes optimization for coal spontaneous combustion predictio[J]. Journal of Mine Automation, 2018, 44(7): 61-65. DOI: 10.13272/j.issn.1671-251x.17341
Citation: WU Fusheng. Experimental study on composite gas indexes optimization for coal spontaneous combustion predictio[J]. Journal of Mine Automation, 2018, 44(7): 61-65. DOI: 10.13272/j.issn.1671-251x.17341
shu

Experimental study on composite gas indexes optimization for coal spontaneous combustion predictio

  • 1.

    CCTEG Changzhou Research Institute, Changzhou 213015, China

  • 2.

    Tiandi(Changzhou) Automation Co., Ltd., Changzhou 213015, China

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  • Changing rule of composite gas indexes under different dry air flow and oxygen concentration was analyzed through coal temperature-programmed experiment. The experimental results show that φ(O2)/(φ(CO)+φ(CO2)) should be selected as gas indexes for coal spontaneous combustion prediction in the case of uncertain dry air flow. φ(O2)/(φ(CO)+φ(CO2)) can be used as gas indexes for coal spontaneous combustion prediction when coal temperature is below 100 °C. φ(C2H4)/φ(CH4) and φ(CO)/φ(CO2) can be used as gas indexes for coal spontaneous combustion prediction when coal temperature exceeds 100 °C. φ(C2H4)/φ(CO) can also be used as gas indexes for coal spontaneous combustion when coal temperature exceeds 160 °C and oxygen volume fraction is approximately 5%.
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