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Dynamic evolution of negative pressure impact of cross-cut on oxygen concentration field in coal mine Goaf

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Abstract

For further understanding the coal spontaneous combustion in goaf, the dynamic evolution of the oxygen concentration field influenced by the condition of negative pressure of cross-cut were analyzed. Based on the on-site testing results, the range of the oxidation zone on the headentry and tailentry side is determined as 30 ~ 75 m and 15 ~ 65 m respectively. This paper adopts a new method called “fixed grid, dynamic attribute” to dynamically describe the spatial change of goaf caused by working face advancing. The validated model which developed by field measured data is used to study the dynamic evolution of negative pressure impact of cross-cut on oxygen concentration field in goaf. The results demonstrate that when the cross-cut is located at different positions of three zones of coal spontaneous combustion, the negative pressure of the cross-cut has different impact rules on the distribution of oxygen concentration field. The results are hopeful for providing effective guidance for coal mine fire prevention in goaf.

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Acknowledgements

The authors deeply appreciate the financial supports provided by the National Key Research and Development Program of China (No. 2016YFC0802900).

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Authors and Affiliations

  1. Key Laboratory of Gas and Fire Control for Coal Mines, School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Liangzhou Chen & Pengxiang Ding

  2. School of Resource and Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China

    Jian Yang

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  1. Liangzhou Chen
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Correspondence to Liangzhou Chen.

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Chen, L., Yang, J. & Ding, P. Dynamic evolution of negative pressure impact of cross-cut on oxygen concentration field in coal mine Goaf. Heat Mass Transfer 57, 737–749 (2021). https://doi.org/10.1007/s00231-020-02981-z

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