摘要
山西大同鹊山煤矿14号煤层具有易自燃的特性,常规方法很难对其进行预测,对该矿煤样进行了实验室测试,分析了煤自燃过程中不同标志性气体之间的关系。通过实验室测定不同煤温下的CO、CO_(2)、CH_(4)、C_(2)H_(6)、C_(2)H_(4)、C_(3)H_(8)、C_(3)H_(6)和C_(2)H_(2)气体数据,探寻各标志性气体与煤温之间的关系。研究结果表明,CO、C_(2)H_(6)、C_(2)H_(4)、C_(3)H_(8)、C_(3)H_(6)和C_(2)H_(2)的浓度随温度的变化规律最好。若该矿14号煤层含有以上气体,则说明该矿煤存在氧化升温现象,建议对于该矿的14号煤层,应以CO、C_(2)H_(4)和C_(2)H_(2)作为主要的监测气体,同时辅以C_(2)H_(6)、C_(3)H_(8)和C_(3)H_(6)作为辅助指标,以精准捕捉和评估煤层自然发火的特征。通过在实际工程中的验证,确认了CO可作为一种敏感且可靠的预测预报煤自然发火的标志性气体,CO在煤炭温度达到约38℃时开始显著出现,并且其预测的温度范围能够覆盖至95℃之前的阶段。研究结果为相似地质条件煤矿煤自燃的预测预报提供了实验依据,能够为该矿的安全生产提供有效指导。
The 14#coal seam of Queshan Coal Mine in Datong,Shanxi Province has the characteristic of easy spontaneous combustion,which is difficult to be predicted by conventional methods.Laboratory tests were carried out on coal samples from the mine to analyze the relationship between different indicator gases in the spontaneous combustion process of coal.The data of CO,CO_(2),CH_(4),C_(2)H_(6),C_(2)H_(4),C_(3)H_(8),C_(3)H_(6)and C_(2)H_(2)gases at different coal temperatures were measured in the laboratory to explore the relationship between each indicator gas and coal temperature.The results of the study show that the concentration of CO,C_(2)H_(6),C_(2)H_(4),C_(3)H_(8),C_(3)H_(6)and C_(2)H_(2)has the optimum variation rule with temperature.If the 14#coal seam contains the aforementioned gases,there is an oxidative warming phenomenon in the coal,so it is suggested that the 14#coal seam should use CO,C_(2)H_(4)and C_(2)H_(2)as the main and C_(2)H_(6),C_(3)H_(8) and C_(3)H_(6)as the auxiliary gases as the natural ignition marker gases of the seam,so as to master the spontaneous combustion of the coal.Finally,it was verified through actual engineering that CO can be used as an indicator gas for predicting the natural ignition of coal,and its emergence temperature is around 38℃,and its predicted temperature range is before 95℃.
作者
冯慧娟
FENG Huijuan(Shanxi Dibao Energy Co.,Ltd.,Taiyuan 030045,China;Shanxi Dibao Coal Comprehensive Testing Center Co.,Ltd.,Taiyuan 030045,China)
出处
《陕西煤炭》
2025年第5期51-55,共5页
Shaanxi Coal
关键词
煤层自燃
标志性气体
预测
初始化
coal
spontaneous combustion
indicator gas
prediction
initialization
