煤自然发火期预测模型研究  

Study on prediction model of coal spontaneous combustion stage

作　　者：邓军[1] 张燕妮[2] 徐通模[1] 徐精彩[2] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]西安科技大学能源学院,陕西西安710054

出　　处：《煤炭学报》2004年第5期568-571,共4页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(10102016);国家杰出青年基金资助项目(50125414)

摘　　要：通过对煤自燃过程及总参数的理论分析,得出煤体自然发火期与表征外界散热条件的毕渥数Bi、表征煤体散热性的煤体导温系数α和表征煤体放热性的参数A 有关.根据大型煤样自然发火实验台(1 5t)的测定结果,求出与发火期相对应的煤体等效放热强度,并拟合出等效放热强度与表征煤体自燃性强弱的特征放热强度的函数关系,从而建立了实验条件下煤体自然发火期预测模型,该预测模型中未知参数少,易确定,预测误差小于15%.In light of the theoretical analysis of coal self-ignition and entire parameter, the spontaneous combustion stage is related with the parameters B_i(which presents outer heating condition), α (which presents the coal transmit ratio of temperature during the course of coal self-heating) and A~* which presented the nature of coal self-heating. Based on the experimental results of coal spontaneous combustion in the self-ignition test-bad of coal, the coal equivalent self-heating intensity in the time of ignition stage was calculated and the relation between the equivalent self-heating intensity and characteristic self-heating intensity was got. The mathematic model for the prediction of the experimental spontaneous combustion stage was built up.It needs only the experimental data from the small-scale self-heating test. The unknown parameters of the model are few and easy to obtain. The prediction error of the model is less than 15%.

关 键 词：煤 自然发火期 预测模型 特征放热强度 

分 类 号：TD752[矿业工程—矿井通风与安全]