基于绝热实验活化能解算煤自然发火期  

Calculation of ignition times under adiabatic conditions by activation energy

作　　者：李林[1] 姜德义 B.B. Beamish 

机构地区：[1]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400030 [2]School of Engineering,University of Queensland

出　　处：《煤炭学报》2010年第5期802-805,共4页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2009CB724606);国家创新研究群体基金资助项目(50621403)

摘　　要：根据煤与氧反应的热平衡方程导出活化能E的计算公式,结合Boddington公式求得煤自然发火期计算模型。通过煤样的绝热氧化实验获得3个典型煤样自燃过程升温曲线,得出煤低温氧化和高温氧化状态下的不同氧化规律,煤在温度小于80℃时氧化不剧烈,温度升高缓慢,一旦温度超过100℃时氧化异常剧烈,温度迅速升高,难以控制。分析处理实验数据获得煤样的活化能E值,结合煤样自然发火模型求出典型煤样的自然发火期,与现场测量的实际值相差不大。但由于煤的自然发火期受各方面因素的影响,因此该模型在运用到实际情况时应进行相应的校正。Calculation of ignition times was fraught with the difficulty that they were strongly dependent on degree of super-criticality. Based on the thermal equilibrium equation of coal and oxygen reaction,a mathematical model of the ignition time of coal was put forward with activation energy E and equation Boddington. The temperature-time curves and the different rule that coal react with oxygen in lower or higher temperature were obtained through adiabatic testing in UQ adiabatic oven with three topical samples. The ignition time of samples was calculated by the mathematical model with activation energy,it was very close with the practicability ignition time. So,this model can be used to risk assessment for hazard management planning with corrections,because the ignition time is influenced by many factors in mine site. The reward for the ignition times is a much more soundly based prediction of safety or otherwise.

关 键 词：绝热实验 活化能 煤 发火期 

分 类 号：TD752.2[矿业工程—矿井通风与安全]