煤矿安全2024，Vol.55Issue(9)：30-39,10.DOI:10.13347/j.cnki.mkaq.20240839
不同变质程度煤氧化特征指标量化分析
Quantitative analysis of oxidation characteristic indicators of coal with different metamorphic degrees
摘要
Abstract
In order to study the changes of oxidation characteristics of coal with different degrees of metamorphism,the oxidation process of non-sticky coal(BN),gas-fat coal(QF)and 1/3 coking coal(1/3JM)was tested and analyzed by temperature programmed experiment system,the apparent activation energy of different oxidation stages was determined,and the change characteristics of spontaneous combustion limit parameters of coal were quantitatively calculated.The results show that the apparent activation energy of coal with low metamorphism is lower than that of coal with high metamorphism.The average apparent activation energy of BN,QF and 1/3JM coal samples is 39.90,65.28 and 69.43 kJ/mol,respectively.The apparent activation energy of coal is positively cor-related with its metamorphism,and the spontaneous combustion risk of coal with low metamorphism is higher;the apparent activa-tion energy of the same coal at different stages is also different.The apparent activation energy of BN,QF and 1/3JM coal samples at stage 1 is 55.28,75.05 and 80.79 kJ/mol,respectively,and that of stage 3 is 23.23,59.07 and 61.50 kJ/mol,respectively,which de-creases with the depth of oxidation reaction;the extreme temperature points of the three coal spontaneous combustion limit paramet-ers are 50.3,61.5 and 59.7℃,respectively.The extreme point temperatures of low-metamorphic coals are lower than those of high-metamorphic coals;under the same conditions,the minimum floating coal thickness and lower oxygen volume fraction of low meta-morphism coal are smaller,the upper air leakage intensity is larger,and the spontaneous combustion is more likely to occur.关键词
不同变质程度煤/表观活化能/极限参数/煤自燃/氧化特征Key words
coal with different metamorphic degrees/apparent activation energy/limit parameter/coal spontaneous combustion/ox-idation characteristic分类
矿业与冶金引用本文复制引用
郭宇,冯全超,雷昌奎,年军,白亚娥..不同变质程度煤氧化特征指标量化分析[J].煤矿安全,2024,55(9):30-39,10.基金项目
国家自然科学基金资助项目(52204229) （52204229）
山西省基础研究计划青年科学研究资助项目(20210302124349) （20210302124349）
山西省高等学校科技创新资助项目(2021L054) （2021L054）
陕西省教育厅2023年度一般专项科研计划资助项目(23JK0429) （23JK0429）
