轴压作用下长焰煤氧化自燃特性研究  

Study on characteristics of oxidation combustion of long flame coal under axial compression

作　　者：陈蒙磊 徐永亮[1,3] 刘泽健 吕志广 步允川 CHEN Menglei;XU Yongliang;LIU Zejian;LYU Zhiguang;BU Yunchuan(College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;Guizhou Coal Mine Design Research Institute Co.,Ltd.,Guiyang 550025,Guizhou,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454000,Henan,China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454000 [2]贵州省煤矿设计研究院有限公司,贵州贵阳550025 [3]河南理工大学河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2022年第5期17-23,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(52074108,51874124);河南省科技攻关项目(182102310771)。

摘　　要：为了深入探究浅埋煤层煤田火灾发展机理,分析煤在不同轴压作用下自燃时CO生成量、耗氧速率、表观活化能的变化规律,采用荷载加压煤自燃特性参数测定装置对2~6 mm粒径煤样进行加压升温实验,结果表明:轴压0~4 MPa时煤样并不会产生裂隙,轴压6 MPa时煤样产生少量裂隙,轴压8 MPa时产生较多裂隙,轴压10 MPa时产生的部分裂隙又被压实;通过对CO生成量、耗氧速率和煤温度倒数1/T进行分段线性拟合,发现在低温阶段计算出的T1O2可作为不同轴压下煤氧化反应的特征温度,在高温阶段及低轴压时T^(2)_(O_(2))可作为不同轴压下煤氧化反应的特征温度。To delve into the fire oxidation development mechanism of the shallow buried layer coalfield,effect of CO,oxygen consumption rate and the changing rule of the apparent activation energy of the coal under axial compression,and the load pressure of coal spontaneous combustion characteristic parameters measurement device was used for 2~6 mm diameter pressure heating experiments of coal samples.The results showed that when the axial compression was in 0~4 MPa the coal sample didn’t crack,when axial compression was6 MPa the coal samples produced small cracks,when axial compression was 8 MPa,the more fractures.When the axial compression was 10 MPa,the produce part of the fracture was compacted.By piecewise linear fitting of oxygen consumption rate,CO production and reciprocal 1/T of coal temperature,it was found that T1O2calculated at low temperature could be used as the characteristic temperature of coal oxidation reaction under different coaxial pressure,and T^(2)_(O_(2))at high temperature and low axial pressure could be used as the characteristic temperature of coal oxidation reaction under different coaxial pressure.

关 键 词：煤田火灾 轴压 耗氧速率 活化能 特征温度 

分 类 号：TD752.2[矿业工程—矿井通风与安全]