煤最短自然发火期快速预测方法  

Fast prediction method for the shortest coal spontaneous combustion period

作　　者：康文杰 周亮宇[1,2] 王德明 李金帅[1] KANG Wenjie;ZHOU Liangyu;WANG Deming;LI Jinshuai(School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;Key Laboratory of Gas and Fire Control for Coal Mines,Ministry of Education,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116

出　　处：《工矿自动化》2019年第5期31-34,共4页Journal Of Mine Automation

基　　金：国家重点研发计划资助项目(2016YFC0801800);国家自然科学基金青年基金资助项目(51704284);江苏省大学生创新训练计划资助项目(201810290002Y)

摘　　要：针对现有煤最短自然发火期预测方法存在操作复杂、耗时费力等问题,提出了一种煤最短自然发火期快速预测方法。通过煤自燃特性的氧化动力学测试获得煤氧化过程中不同阶段的特征参数,利用线性拟合建立了煤自燃倾向性判定指数和绝热氧化时间的函数关系;根据F-K热自燃理论,建立了煤绝热氧化时间和特征尺寸之间的函数关系;利用以上函数关系推导出煤最短自然发火期快速预测模型。基于该方法获得的煤最短自然发火期预测值与实际值基本一致。该方法耗时少、操作简单,适合大量煤样的最短自然发火期预测。In view of problems of complicated operation,large time consumption and high labor intensity of existing prediction methods for the shortest coal spontaneous combustion period,a fast prediction method for the shortest coal spontaneous combustion period was proposed.Characteristic parameters of different stages in coal oxidation process are obtained through oxidation kinetics test for coal spontaneous combustion characteristics.Function relationship between classification index of coal spontaneous combustion tendency and adiabatic oxidation time is established by linear fitting.According to theory of F-K thermal spontaneous combustion,function relationship between the adiabatic oxidation time and characteristic size of coal is established.A fast prediction model for the shortest coal spontaneous combustion period is derived based on the above function relationships.The predicted value of the shortest coal spontaneous combustion period obtained by the method is basically consistent with the actual value.The method is suitable for the shortest spontaneous combustion period prediction of a large number of coal samples with less time consumption and simple operation.

关 键 词：煤炭开采 最短自然发火期 煤自燃特性 氧化动力学 绝热氧化时间 煤自燃倾向性 

分 类 号：TD752[矿业工程—矿井通风与安全]