摘要
为研究邻近采空区浸水失水煤样低温氧化过程的煤自燃规律,在对原煤和浸水失水煤样进行工业分析的基础上,利用扫描电镜和红外光谱分析原煤和浸水失水煤样的微观结构和官能团变化规律。结果表明:室温25℃时,浸水失水煤样长期浸泡在水中,煤体吸水溶胀发生破裂,孔隙结构由紧实变为松散,孔隙增大,与氧接触面积增大,吸附氧的能力增强,1 800 cm-1附近含氧官能团(C=O)峰值变强,加速煤样的低温氧化进程,煤样失水过程中水分带走部分无机物质,水分微增,但孔隙率增大,随着温度的升高,两煤样含氧官能团增加,低温氧化过程加快,浸水失水煤样的氧化速度较原煤快。
In order to study the laws of coal spontaneous combustion in the process of low temperature oxidation of coal samples near goaf, based on the industrial analysis of raw coal and water immersed and dehydrated coal samples, the microstructure and functional groups of raw coal and water immersed and dehydrated coal samples were analyzed by scanning electron microscope and infrared spectrum. The results show that:at the room temperature of 25 ℃, put the water immersed and dehydrated coal samples in water for a long time, rupture occurs in water absorption swelling of coal, the pore structure changes from compact to loose, the porosity increases, the contact area with oxygen increases, and the ability to absorb oxygen increases;groups containing oxygen near 1 800 cm-1(C=O) peak becomes strong, accelerating the process of low temperature oxidation, some inorganic material decreases with the process of water loss away slightly, but the porosity increases;with the increase of temperature, functional groups containing oxygen of two coal samples increase, the process of low temperature oxidation is accelerated, the oxidation rate of water immersed and dehydrated coal samples is fast than raw coal.
作者
赵文彬
蔡海伦
李振武
孔祥堂
赵超
宋蕾
刘晴
芦继芋
ZHAO Wenbin;CAI Hailun;LI Zhenwu;KONG Xiangtang;ZHAO Chao;SONG Lei;LIU Qing;LU Jiyu(College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Yunhe Coal Mine,Shandong Jining Mining Group,Jining 272000,China;3.Shandong Energy Linyi Mining Group Co.,Ltd.,Linyi 276017,China)
出处
《煤矿安全》
CAS
北大核心
2019年第1期43-47,共5页
Safety in Coal Mines
关键词
微观结构
官能团
浸水失水
低温氧化
煤自燃
microstructure
functional groups
water immersed and dehydrated
low temperature oxidation
coal spontaneous combustion
