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《Journal of China Coal Society》 2010-08
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Micro thermal dynamics analysis on mine supporting wood under the effect of flame wave after methane explosions

DUAN Yu-long1,ZHANG Hong-min2,ZHOU Xin-quan1,FENG Xiao-guang1,WANG Yi1,WANG Pu1(1.State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology(Beijing),Beijing 100083,China;2.Teaching Affairs Division,Henan University of Urban Construction,Pingdingshan 467000,China)  
The micro thermal dynamics analysis of mine supporting wood under the effect of fast flame with high temperature after methane explosions was researched to get the mechanism of secondary fire induced by mine methane explosions.Based on some methane explosion experiments data produced by some researchers,the characteristics of flame after methane explosions were got.The transient temperature field of supporting wood under different flame temperature and different heating time were calculated,analyzed and validated.The chemical kinetic model was established,and the experiments of curie point fast pyrolysis on supporting wood were carried at different temperature and holding time.These experimental conditions could nearly fulfill that of methane explosions.Comparative analysis was done between the data from some conference which had nearly the same model and coefficient and the data from experiments.When temperature is 550 ~ 1 050 K,pyrolysis gas increases steadily from 3.3% to 32.1%,tar increases firstly and then to be steady from 1.8% to 48.8%,the biggest value is 52.6%,and the char decreases steadily from 94.7% to 19.1% .The literature data and the experimental data has good agreement to each other.
【Fund】: 国家重点基础研究发展计划(973)项目(2005CB221506);; 国家“十一五”科技支撑计划(2007BAK22B04);; 煤炭资源与安全开采国家重点实验室2008自主课题(SKLCRSM08B12)
【CateGory Index】: TD712.7
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