察哈素3号煤低温氧化过程中孔隙特征变化规律研究  

Study on Variation Law of Chahasu NO.3 Coal Pore Characteristics Under Low Temperature Oxidation

作　　者：王玉怀[1] 刘二小[2] 侯婓 

机构地区：[1]华北科技学院环境工程学院,北京东燕郊101601 [2]华北科技学院安全工程学院,北京东燕郊101601

出　　处：《华北科技学院学报》2017年第1期17-20,共4页Journal of North China Institute of Science and Technology

基　　金：中央高校基本科研业务资助基金(3142015021;3142015124;3142015119)

摘　　要：煤的低温氧化阶段是煤自燃过程中的重要阶段,这个过程中煤的具体变化至今尚未探明。为了研究察哈素3号煤层煤样在低温氧化下的孔隙特征,分析其孔容以及各种孔径的分布规律,实验筛选了四组不同粒径的煤样分别进行25~75℃低温氧化,然后用压汞仪进行测试,测试结果表明:大部分样品中大孔所占体积较大,煤样的孔隙率和孔容随着氧化温度的升高而增大,四组样品的孔径体积百分比随着温度的升高连续变化,而且反应速率在接近75℃时降低。The low-temperature oxidization of coal is an important stage of spontaneous combustion, in this process the specific changes of coal has not yet been proven. So in order to get the features of pore in the low - temperature oxidization, a study of the pore volume and the distribution of various pore sizes was been researched. The experiment selected four groups of coal samples and experimented separately under 25 - 75℃. The results showed that macroporous accounted for large proportion in most samples and the porosity and pore volume of the coal sample increased with the increase of the oxidation temperature. The percentage distri- bution of the pore size of the four groups changed continuously with the increase of the temperature, and the reaction rate reduced when close to 75℃.

关 键 词：低温氧化 孔径分布 孔容 孔隙率 

分 类 号：TD752[矿业工程—矿井通风与安全]