首页|煤自燃预测指标气体确定及工作面一氧化碳来源分析

煤自燃预测指标气体确定及工作面一氧化碳来源分析

扫码查看
采用实验分析和现场观测相结合的方法,研究了新疆乌苏四棵树七号井综放工作面煤层自燃倾向性、最短发火期,确定了 自然发火指标气体,分析了工作面一氧化碳来源.研究认为,该矿A5煤层应以一氧化碳作为自然发火初期的预测指标气体,以烯烃为辅助指标气体来判断煤的自燃程度.将一氧化碳作为30 ℃~130 ℃区间预测自燃的指标气体,一氧化碳出现时说明煤已经发生氧化反应;将烯烃作为130 ℃~200 ℃区间判断煤自燃程度的指标气体,乙烯、乙烷出现时说明煤温已达到130℃,丙烷出现时说明煤温已达到150℃.该矿A504工作面一氧化碳主要来源于本工作面采空区遗煤氧化(占88%),还有一部分来源于工作面两道超强深孔预裂爆破(占12%).研究成果为矿井自然发火防治工作提供可靠的依据.
Determination of index gas of coal spontaneous combustion prediction and analysis of CO sources in working faces
Using a combination of experimental analysis and on-site observation,the spontaneous combustion tendency and shortest igni-tion period of coal seams in the No.7 well of Sikeshu in Wusu,Xinjiang were studied,and the indicator gas for spontaneous combustion was determined.The source of carbon monoxide in the working face was analyzed.Research suggests that the A5 coal seam in the mine should use CO as the predictive index gas for the initial stage of spontaneous combustion,and olefins as the auxiliary index gas to deter-mine the degree of coal spontaneous combustion.Using CO as an index gas for predicting spontaneous combustion in the range of 30 ℃~130℃,the appearance of CO indicates that the coal has undergone oxidation reaction.Using olefins as an index gas to determine the degree of coal spontaneous combustion in the range of 130 ℃~200 ℃,the presence of ethylene and ethane indicates that the coal tem-perature has reached 130 ℃,and the presence of propane indicates that the coal temperature has reached 150 ℃.The CO in A504 working face of the mine mainly comes from the oxidation of residual coal in the goaf of this working face(accounting for 88%),and a part of it comes from two ultra strong deep hole pre splitting blasting in the working face(accounting for 12%).The research results provide a reliable basis for the prevention and control of natural combustion in mines.

coal spontaneous combustionindex gasCOsource

王正帅

展开 >

中煤科工集团重庆研究院有限公司,重庆 400037

煤自燃 指标气体 一氧化碳 来源

2024

煤炭科技
江苏省徐州矿务集团有限公司 江苏省煤炭学会 中国矿业大学

煤炭科技

影响因子:0.17
ISSN:1008-3731
年,卷(期):2024.45(2)
  • 15