Study on Determination of Coal Spontaneous Combustion Characteristic Temperature Based on Analysis Method of Index Gas Growth-Rate
DENG Jun
ZHAO Jingyu
ZHANG Yanni
Abstract：In order to determine the characteristic temperature for coal spontaneous combustion,a programmed temperature experiment system was applied, and an analysis method of index gas growth-rate was established on analysis method of index gas.The analysis was conducted on the CO and C2H4 index gas,φ(CO)/φ(CO2),alkane ratio and the growth-rate.The characteristic temperatures of coal spontaneous combustion for the different metamorphic grade coal samples were obtained. The critical temperature of non-caking coal from Fucheng Mine was 70~80 ℃ and the dry cracking temperature was 110~120℃.The critical temperature of weak caking coal from Shuiliandong Mine was 70~80 ℃ and the dry cracking temperature was 115~125 ℃. The critical temperature of long flame coal from Yuhua Mine was 60~70 ℃ and the dry cracking temperature was 100~110 ℃. The critical temperature of gas-fat coal from Zhaolou Mine was 80~90 ℃ and the dry cracking temperature was 110~120 ℃. The analysis results showed that the spontaneous combustion characteristic temperature of the different metamorphic grade coal samples obtained with the analysis method of index gas growth-rate was the same of the characteristic temperature obtained with the analysis method of index gas.The coal samples with higher metamorphic grade would not be easily oxidized.
Keywords：coal spontaneous combustionprogrammed temperatureanalysis method of index gas growth-ratealkane ratio
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 49-52,56 )