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The Effect of High Geo-Temperature Environment on Coal Spontaneous Combustion: An Experimental Study

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Proceedings of the 11th International Mine Ventilation Congress

Abstract

To investigate the effect on coal spontaneous combustion due to high geo-temperature, an experimental apparatus was developed to measure parameters for two kinds of coal samples under different temperatures: one was pretreated at constant temperature of 40 °C (G coal sample), and the other was a rising temperature from room temperature (20 °C, Sample C). Based on the relationship between CO concentration and the temperature variation, a calculation model of the apparent activation energy of coal was established. The results indicated that the oxygen consumption rate, generation rates of CO and CO2, and heat release intensity of Sample G were higher than C coal sample. This trend was more and more obvious as the temperature is increased. Furthermore, the apparent activation energy of G coal sample was smaller than sample C, especially at low temperatures, which demonstrated that the oxidation ability and reactivity of sample G was enhanced, and less energy was required to break the barrier of oxidation reaction. Under the same condition, the speed of oxidation reaction was faster for the coal in the high geo-temperature environment, which was more susceptible to spontaneous combustion.

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Acknowledgements

We thank for the financial support of National Natural Science Foundation Funded Project (Grant No.: 51504186, 51574193), Industrial Technology Research of Shaanxi Province Government (Grant No.: 2016GY–191).

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Authors and Affiliations

  1. School of Safety Science and Engineering, Xi’an University of Science and Technology, 58, Yanta Mid. Rd, Xi’an, Shaanxi, 710054, People’s Republic of China

    Jun Deng, Changkui Lei, Yang Xiao, Li Ma & Kai Wang

  2. Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an University of Science and Technology, 58, Yanta Mid. Rd, Xi’an, Shaanxi, 710054, People’s Republic of China

    Jun Deng, Yang Xiao, Li Ma & Kai Wang

  3. Graduate School of Engineering Science and Technology, Yunlin University of Science and Technology (YunTech), Yunlin, 64002, Taiwan, China

    Chimin Shu

Authors
  1. Jun Deng
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  2. Changkui Lei
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  3. Yang Xiao
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  4. Li Ma
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  5. Kai Wang
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  6. Chimin Shu
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Corresponding author

Correspondence to Changkui Lei .

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Editors and Affiliations

  1. Xi’an University of Science and Technology, Xi’an, Shaanxi, China

    Xintan Chang

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Deng, J., Lei, C., Xiao, Y., Ma, L., Wang, K., Shu, C. (2019). The Effect of High Geo-Temperature Environment on Coal Spontaneous Combustion: An Experimental Study. In: Chang, X. (eds) Proceedings of the 11th International Mine Ventilation Congress. Springer, Singapore. https://doi.org/10.1007/978-981-13-1420-9_46

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