煤矿安全2018，Vol.49Issue(2)：27-30,4.DOI:10.13347/j.cnki.mkaq.2018.02.008
风量对煤自燃极限参数影响的实验研究
Experimental Study on the Effect of Air Volume on Coal Spontaneous Combustion Limit Parameters
摘要
Abstract
In order to study the effect of air volume on coal spontaneous combustion limit parameters,we use coal spontaneous combustion program temperature test device to make this study,the oxygen consumption rate,CO,CO2 production rate and exothermic strength of coal samples under five different air volume conditions were analyzed.We calculate the coal spontaneous combustion limit parameters and analyze the variation law on this basis.Study shows that the different air supply leads to different degrees of oxidative exothermic strength of the coal,in the case of the air flow of 60 mL/min,the exothermic intensity of the medium reaches a maximum;the variation of spontaneous combustion limit parameters of coal can be divided into two stages:the air volume is less than 40 mL/min,the minimum floating coal thickness and the lower oxygen concentration of coal samples decrease with the increase of air volume,the upper air leakage intensity of the coal sample increases with the increase of the air volume;when the air volume is more than 40 mL/min,the minimum floating coal thickness and the lower limit oxygen concentration increase linearly with the increase of air volume,and the upper limit air leakage intensity decreases linearly with the increase of air volume.We need to pay attention to the regulation of the air volume in the underground mining process,so that the ignition parameters of coal are not conducive to the development direction of spontaneous combustion.关键词
煤自燃/程序升温/风量/耗氧速率/放热强度/极限参数Key words
coal spontaneous combustion/programmed temperature/ventilation volume/oxygen consumption rate/exothermic strength/limit parameter分类
矿业与冶金引用本文复制引用
郭亚军,邬剑明,王俊峰,王涌宇,宋申..风量对煤自燃极限参数影响的实验研究[J].煤矿安全,2018,49(2):27-30,4.基金项目
国家国际科技合作资助项目(2011DFA72310) （2011DFA72310）
