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Volume 7 Issue 4
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Article Navigation >  Journal of Mining Science and Technology  > 2022  >  7(4): 498-504
Chen Rongfang, Guo Zhiguo, Zhang Jun, Zhao Yu. Characteristics and evolution law of low-temperature oxidation of oxidized coal at recrudescence stage[J]. Journal of Mining Science and Technology, 2022, 7(4): 498-504. doi: 10.19606/j.cnki.jmst.2022.04.012
Citation: Chen Rongfang, Guo Zhiguo, Zhang Jun, Zhao Yu. Characteristics and evolution law of low-temperature oxidation of oxidized coal at recrudescence stage[J]. Journal of Mining Science and Technology, 2022, 7(4): 498-504. doi: 10.19606/j.cnki.jmst.2022.04.012
shu

Characteristics and evolution law of low-temperature oxidation of oxidized coal at recrudescence stage

doi: 10.19606/j.cnki.jmst.2022.04.012

  • School of Resources and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China

  • Received Date: 2021-11-24
  • Rev Recd Date: 2021-12-19
  • Publish Date: 2022-08-30
    Abstract
  • In order to explore the low-temperature oxidation characteristics and evolution law of oxidized coal, this paper adopted a temperature-programmed experiment system. Firstly, the low-temperature oxidation temperature-programmed experiment was carried out on the oxidized coal formed by N2 anaerobic cooling after the coal samples were pre-oxidized to 60 ℃, 90 ℃, 120 ℃, 150 ℃, 180 ℃ and 210 ℃ respectively. At the same time, in order to further reveal the characteristics of low-temperature oxidation behavior of oxidized coal formed under different fire extinguishing conditions, the low-temperature oxidation temperature programmed test was carried out on the oxidized coal formed after fire extinguishing with three different volume fractions of N2 when the coal sample was pre-oxidized to 120 ℃. This reveals the changes of oxygen consumption rate, production rate of signature gases (CO, CO2) and heat release intensity of these two kinds of oxidized coals during low temperature oxidation process. The results show that the oxygen consumption rate, signature gas generation rate and heat release intensity of oxidized coal are all lower than those of raw coal. Furthermore, the spontaneous combustion characteristic parameters of coal samples pre-oxidized to 90 ℃ are closer to that of raw coal, indicating that coals pre-oxidized to critical temperature are more likely to reignite. When pre-oxidized to 120 ℃, the higher the volume fraction of N2, the closer the spontaneous combustion characteristic parameters of this oxidized coal are to the original coal, indicating that the coal with higher volume fraction of N2 has stronger recrudescence ability. Therefore, it is necessary to prevent the recurrence of coal when mining the coal body in the near coal seam group, the recrudescence working face and the unsealing fire area.
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    • References(16)
  • [1]
    张洋, 吴兵, 李滕滕, 等. 二次氧化煤燃烧和灭火过程的实验研究[J]. 矿业科学学报, 2020, 5 (3): 272-277. http://kykxxb.cumtb.edu.cn/article/id/289

    Zhang Yang, Wu Bing, Li Tengteng, et al. Experimental study on combustion and extinguishing of secondary oxidation coal[J]. Journal of Mining Science and Technology, 2020, 5(3): 272-277. http://kykxxb.cumtb.edu.cn/article/id/289
    [2]
    梁运涛, 侯贤军, 罗海珠, 等. 我国煤矿火灾防治现状及发展对策[J]. 煤炭科学技术, 2016, 44(6): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201606001.htm

    Liang Yuntao, Hou Xianjun, Luo Haizhu, et al. Development countermeasures and current situation of coal mine fire prevention & extinguishing in China[J]. Coal Science and Technology, 2016, 44(6): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201606001.htm
    [3]
    邓军, 李贝, 王凯, 等. 我国煤火灾害防治技术研究现状及展望[J]. 煤炭学报, 2016, 44(10): 1-7, 101. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201610001.htm

    Deng Jun, Li Bei, Wang Kai, et al. Research status and outlook on prevention and control technology of coal fire disaster in China[J]. Coal Science and Technology, 2016, 44(10): 1-7, 101. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201610001.htm
    [4]
    Deng Jun, Zhao Jingyu, Zhang Yanni, et al. Thermal analysis of spontaneous combustion behavior of partially oxidized coal[J]. Process Safety and Environmental Protection, 2016, 104: 218-224. doi: 10.1016/j.psep.2016.09.007
    [5]
    Taraba B, Pavelek Z. Study of coal oxidation behaviour in reopened sealed heating[J]. Journal Loss and Prevention in the Process Industries, 2016, 40: 433-436. doi: 10.1016/j.jlp.2016.02.002
    [6]
    Liang Yuntao, Tian Fuchao, Luo Haizhu, et al. Characteristics of coal re-oxidation based on microstructural and spectral observation[J]. International Journal of Mining Science & Technology, 2015, 25: 749-754.
    [7]
    陆伟, 李金亮, 杨兴兵. 采用交叉点温度法对启封煤易复燃问题的研究[J]. 煤矿安全, 2013, 44(12): 230-233. https://www.cnki.com.cn/Article/CJFDTOTAL-MKAQ201312073.htm

    Lu Wei, Li Jinliang, Yang Xingbing. Study on easy spontaneous combustion problem of unsealed coal with crossing point temperature method[J]. Coal Mine Safety, 2013, 44(12): 230-233. https://www.cnki.com.cn/Article/CJFDTOTAL-MKAQ201312073.htm
    [8]
    Deng Jun, Li Qingwei, Xiao Yang, et al. Experimental study on the thermal properties of coal during pyrolysis, oxidation, and re-oxidation[J]. Applied Thermal Engineering, 2017, 110: 1137-1152. doi: 10.1016/j.applthermaleng.2016.09.009
    [9]
    邓军, 赵婧昱, 张嬿妮, 等. 不同变质程度煤二次氧化自燃的微观特性试验[J]. 煤炭学报, 2016, 41(5): 1164-1172. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201605015.htm

    Deng Jun, Zhao Jingyu, Zhang Yanni, et al. Experiments on the microscopic characteristics of secondary oxidation and spontaneous combustion of coals with different deterioration[J]. Journal of China Coal Society, 2016, 41(5): 1164-1172. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201605015.htm
    [10]
    Deng Jun, Zhao Jingyu, Huang Anchi, et al. Thermal behavior and microcharacterization analysis of second-oxidized coal[J]. Journal of Thermal Analysis and Calorimetry, 2017, 127: 439-448. doi: 10.1007/s10973-016-5493-8
    [11]
    马威. 西庞煤矿复采工作面采空区浮煤自燃规律及防治技术研究[D]. 西安: 西安科技大学, 2007.
    [12]
    陆新晓, 赵鸿儒, 朱红青, 等. 氧化煤复燃过程自燃倾向性特征规律[J]. 煤炭学报, 2018, 43(10): 2809-2816. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201810019.htm

    Lu Xinxiao, Zhao Hongru, Zhu Hongqing, et al. Characteristic rule of spontaneous combustion tendency of oxidized coal at recrudescence stage[J]. Journal of China Coal Society, 2018, 43(10): 2809-2816. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201810019.htm
    [13]
    秦跃平, 宋怀涛, 许士民. 重复升温对煤低温氧化特性影响的试验研究[J]. 煤矿安全, 2014, 45(5): 9-12. https://www.cnki.com.cn/Article/CJFDTOTAL-MKAQ201405003.htm

    Qin Yueping, Song Huaitao, Xu Shimin. Experimental study on impact of repeated heating on coal low temperature oxidation characteristics[J]. Coal Mine Safety, 2014, 45(5): 9-12. https://www.cnki.com.cn/Article/CJFDTOTAL-MKAQ201405003.htm
    [14]
    张辛亥, 李青蔚. 预氧化煤自燃特性试验研究[J]. 煤炭科学技术, 2014, 42(11): 37-40. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201411011.htm

    Zhang Xinhai, Li Qingwei. Experiment study on spontaneous combustion characteristics of pre-oxidized coal[J]. Coal Science and Technology, 2014, 42(11): 37-40. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201411011.htm
    [15]
    郭志国, 王蓉, 张俊, 等. CO2防控氧化煤复燃效率的试验研究[J]. 矿业科学学报, 2021, 6 (2): 139-144. doi: 10.19606/j.cnki.jmst.2021.02.003

    Guo Zhiguo, Wang Rong, Zhang Jun, et al. Experimental research on the fire-fighting effects of CO2 on the recrudescence process of oxidized coal[J]. Journal of Mining Science and Technology, 2021, 6(2): 139-144. doi: 10.19606/j.cnki.jmst.2021.02.003
    [16]
    Battistutta E, Hemert P V, Marcin L, et al. Swelling and sorption experiments on methane, nitrogen and carbon dioxide on dry Selar Cornish coal[J]. International Journal of Coal Geology, 2010, 84(1): 39-48.
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