摘要
为对上部煤层工作面采空区自燃危险性进行早期预测,研究煤样二次氧化自燃特性。以陕西玉华矿侏罗纪煤层未氧化煤样(一次氧化)和氧化煤样(二次氧化)为研究对象,采用煤样程序升温试验来系统测试二次氧化煤样的宏观自燃特性参数,并采用物理吸附分析法和红外光谱试验法测试煤表面微观特征。结果表明:氧化前期,二次氧化煤样耗氧速率、CO产生率和放热强度均大于一次氧化煤样的相应数据;氧化后期,二次氧化煤样自燃特性参数均小于一次氧化煤样的相应数据,且二次氧化煤分子中含氧官能团显著增多。
To detect early spontaneous combustion of coal remaining in gob areas, oxidation of coal was studied. Raw Jurassic coal samples and oxidized Jurassic coal samples were taken from Yuhua coal mine. Temperature-programmed experiments were carried out to study the releases of gaesous products and spon- taneous combustion characteristic parameters. Physical adsorption experiments and infrared spectrum ex- periments were used to study the variation of the activated functional groups. It was found that in the earli- er stage of oxidation, the oxidized Jurassic coal samples＂ rate of oxygen consumption, the release rate of carbon monoxide and intensity of heat release were greater than those of raw Jurassic coal samples, and that in later stage, the condition was reversed, and much more oxygen-containing functional groups were found in the secondary-oxidized coal.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2014年第1期34-40,共7页
China Safety Science Journal
基金
国家自然基金重点项目资助(51134019)
国家自然基金主任项目资助(51244001)
陕西省自然科学基金资助(2011JM7014)
"973"计划前期研究项目(2011CB411902)
关键词
侏罗纪煤
二次氧化
基础特性
红外光谱
程序升温
自燃特性
Jurassic coaltemperature
secondary oxidation
basic features
infrared spectrum
program
spontaneous combustion characters
