高瓦斯易燃煤层自燃判别指标体系的实验研究
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摘要
通过煤自燃程序升温实验,分析了在不同温度下平顶山矿区己组煤样的耗氧速度以及CO_2、CO、CH_4、C_2H_4、C_2H_6等气体的产生量,研究了己组煤在整个氧化阶段气体产物的生成规律及其特征,得出煤样耗氧量与煤温升高之间的对应关系。最终确定CO、C_2H_4、C_2H_6作为判断己组煤自然发火的不同阶段的标志性气体,CO/CO_2、C_2H_4/C_2H_6比值作为辅助指标。根据试验结果确定平顶山矿区己组煤自燃标志性气体临界判别指标值,为实现己组煤自然发火的准确预测预判提供依据。
Through the test of spontaneous combustion,we analyzed heat intensity of coal samples at different temperatures,oxygen consumption rate and produce amount of CO_2,CO,CH_4,C_2H_4,C_2H_6,studied the law and characteristics of gas production in the whole oxidation stage,and obtained the corresponding relationship between the oxygen consumption of coal sample and the increase of coal temperature.Finally,we selected the CO,C_2H_4,C_2H_6 as the sign gases for different stages in coal spontaneous combustion of VI Group,the specific value of CO/CO_2 and C_2H_4/C_2H_6 are secondary indicators.Based on test results,we determined the discrimination index value of spontaneous combustion,and provided a reliable basis for forecast and integrated control of Pingdingshan VI Group coal mining.
Through the test of spontaneous combustion,we analyzed heat intensity of coal samples at different temperatures,oxygen consumption rate and produce amount of CO_2,CO,CH_4,C_2H_4,C_2H_6,studied the law and characteristics of gas production in the whole oxidation stage,and obtained the corresponding relationship between the oxygen consumption of coal sample and the increase of coal temperature.Finally,we selected the CO,C_2H_4,C_2H_6 as the sign gases for different stages in coal spontaneous combustion of VI Group,the specific value of CO/CO_2 and C_2H_4/C_2H_6 are secondary indicators.Based on test results,we determined the discrimination index value of spontaneous combustion,and provided a reliable basis for forecast and integrated control of Pingdingshan VI Group coal mining.
引文
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[2]张国枢.通风安全学[M].徐州:中国矿业大学出版社,2011.
[3]刘增平,崔琛,孙爱东.易燃煤层自燃特性参数实验测试[J].煤矿安全,2005,36(10):42-45.
[4]邓军,李贝,李珍宝.预报煤自燃的气体指标优选试验研究[J].煤炭科学技术,2014,42(1):55-59.
[5]王彩萍,王伟峰,邓军.不同煤种低温氧化过程指标气体变化规律研究[J].煤炭工程,2013,45(2):109-111.
[6]辛程鹏,刘义磊.煤自燃预测预报指标性气体实验研究[J].煤炭技术,2015,34(8):145-148.
[7]许涛.煤自燃过程分段特性及机理的实验研究[D].徐州:中国矿业大学,2012.