摘要
为了有效防治吕家坨5424Z采煤工作面煤自燃,通过采取差示扫描量热技术(DSC),分析了不同含水量对煤样吸、放热参数的影响规律。研究表明:煤样水分增量在1%~9%范围内,其热流差零值点温度在230~250℃之间,其对应温度普遍较高,说明煤样的放热整体出现较晚,不易发生自燃现象。但煤样水分增量在1%~4%时,吸收峰峰值温度较低,且吸热速率此时达到最值,则这一水分段煤样较其他实验水分段易发生自燃现象;煤样水分增量在6%~9%时,其曲线斜率较大,较其它含水量煤样而言,该区间内的煤样放热速率较高。
To effectively prevent coal spontaneous combustion in Lyujiatuo 5424 Z coal mining face,the influence of different water content on the adsorption and exothermic parameters of coal samples was analyzed by using differential scanning calorimetry(DSC).The research shows that the moisture increase of coal sample is in the range of 1%to 9%,and the temperature difference between the zero point of the heat flow is between 230°C and 250°C.The corresponding temperature is generally higher,indicating that the heat release of the coal sample appears later.It is not easy to spontaneous combustion.However,when the coal sample moisture increase is between 1%and 4%,the absorption peak-to-peak temperature is lower,and the heat absorption rate reaches the maximum value at this time,the water-segmented coal sample is prone to spontaneous combustion phenomenon compared with other experimental water segments;when the coal sample moisture increase is between 6%and 9%,the slope of the curve is larger.Compared with other water content coal samples,the heat release rate of the coal sample in this interval is higher.
作者
张九零
朱壮
范酒源
刘春雨
ZHANG Jiuling;ZHU Zhuang;FAN Jiuyuan;LIU Chunyu(College of Mining Engineering,North China University of Science and Technology,Tangshan 063009,China)
出处
《煤矿安全》
CAS
北大核心
2019年第6期41-44,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51504077,51404086)
河北省自然科学基金资助项目(E2016209056)
华北理工大学杰出青年基金资助项目(jp201509,JQ201710)
关键词
煤自燃
含水量
差示扫描量热法
放热速率
水分增量
coal spontaneous combustion
water content
differential scanning calorimetry
heat release rate
moisture increase
