doi:10.16186/j.cnki.1673-9787.2020.6.2

Received:2020/01/09

Revised:2020/03/20

Published:2020/11/15

Study on gas optimization of spontaneous combustion index fordifferent coal types

WANG Yuehong, ZHOU Ning, ZHANG Jiuling, ZHU Zhuang

College of Mining Engineering， North China University of Science and Technology， Tangshan 063009 ， Hebei， China

Abstract:In order to study the variation law of spontaneous combustion index gases of different kinds of coal and to improve accurate prediction of early spontaneous combustion of coal， by using the oxidation heating experimental system and the grey relational analysis method， the correlation between the gas generated from five kinds of coal samples and the temperature was analyzed. The results showed that with the increase of temperature ，the gas concentrations of CO， C₂H₄ and C₂ H₆ produced in the oxidation and heating process of most coal samples showed an upward curve. With the increase of coal metamorphic grade， the concentration of the index gases （ CO， C₂H₄ ） generated in the oxidation and heating process of coal would decrease， and the temperature point of the gas was also extended， while the situation of C₂H₆ was just on the opposite. The optimal index gas of anthracite with the highest metamorphic degree was CO ， the preferred index gas of lignite with the lowest metamorphic degree was alkane ratio， and the optimal index gas of other coal samples was C₂H₆. The research results would play a guiding role in mine fire prevention.

Key words:metamorphic grade;index gase;grey relation;optimized analysis;spontaneous combustion of coal

不同煤种自燃指标气体优化研究_王月红.pdf