Study on partition of spontaneous combustion danger zone and prediction of self-ignition in coalmine based on numeric simulation  

作　　者：张辛亥 席光 

机构地区：[1]School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049 China School of Energy, Xi'an University of Science and Technology, Xi'an 710054 China [2]School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049 China

出　　处：《Journal of Coal Science & Engineering(China)》2006年第1期56-59,共4页煤炭学报（英文版）

基　　金：Supported by Natural Science Program of Shaanxi Province Education Department (05JK261)

摘　　要：By solving steady model of air flow diffusion and chemical reaction in loose coal, distribution of oxygen concentration and flow velocity magnitude were obtained. Compared the simulating results with critic value as well as duration of spontaneous combustion from large-scale spontaneous combustion experiment, 'three zones' of spontaneous combustion were partitioned and mining conditions to avoid spontaneous combustion were obtained. The above method was employed to partition 'three zones' in gob of fully mechanized top-coal caving long wall face and got fairly good result. Calculation of the above method is much smaller than simulating the whole process of coal spontaneous combustion, but the prediction precision can satisfy the demand of predicting and extinguishing spontaneous combustion in mining.By solving steady model of air flow diffusion and chemical reaction in loose coal, distribution of oxygen concentration and flow velocity magnitude were obtained. Compared the simulating results with critic value as well as duration of spontaneous combustion from large-scale spontaneous combustion experiment, ＂three zones＂ of spontaneous combustion were partitioned and mining conditions to avoid spontaneous combustion were obtained. The above method was employed to partition ＂three zones＂ in gob of fully mechanized top-coal caving long wall face and got fairly good result. Calculation of the above method is much smaller than simulating the whole process of coal spontaneous combustion, but the prediction precision can satisfy the demand of predicting and extinguishing spontaneous combustion in mining.

关 键 词：coal seam spontaneous combustion PREDICTION numeric simulation flow field 

分 类 号：P618.11[天文地球—矿床学]