煤田露头火区标志性气体确定的试验研究及应用  

Experiment study and application of indicated gas determination to fire area in outcrop of coalfield

作　　者：王文才[1] 张培[2] 任春雨[2] 尚东[2] 郭振坤[2] 陈政[2] 

机构地区：[1]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010 [2]内蒙古科技大学矿业研究院,内蒙古包头014010

出　　处：《煤炭科学技术》2016年第3期55-59,128,共6页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51364028;51064018)

摘　　要：为了研究煤田露头火区标志性气体及其与火区温度的关系,制作了煤田露头火区试验装置。在该试验条件上,提出焦煤在自燃升温期的30-130、130-190及190℃以上3个区间时,分别以CO、C2H4、C2H2作为标志性气体;在阴燃稳定期,以CO作为标志性气体;在窒息降温期的300-160℃及160℃以下时,分别以C2H6和CO作为标志性气体;分析了格氏火灾系数R2判别火区发展状况的可行性,拟合出了标志性气体浓度与火区温度以及R2与火区温度的关系方程。结果表明,煤田露头火区标志性气体的种类与采空区自燃火区的基本相同,但其产生的最低温度不同,即煤体吸附气体出现的最低温度较高,而煤体氧化气体出现的最低温度较低;依据关系方程和R2,可以方便地预测煤田露头火区的温度和发展状况。In order to study the relationship between the indicated gas and the fire area temperature in the fire area of the outcrop of coalfield,a fire area experiment device of the outcrop of the coalfield was prepared. Based on the experiment,the paper proposed the spontaneous combustion heating period for coking with the temperature of 30 - 130、130 - 190 and over 190 ℃,and the indicated gases were CO、C2H4and C2H2 respectively.During a moldering combustion stabilized period,CO would be the indicated gas. During the suffocation and temperature reduction period,when the temperature was 300 - 160 ℃ and below 160 ℃,C2H6 and CO could be the indicated gas individually. The paper analyzed the feasibility of Grignard fire disaster coefficient R2 to distinguish the development status of the fire area and a relationship equation between the indicated gas concentration and the fire temperature as well as R2 and fire area temperature was fitted.The results showed that the type of the indicated gas in the fire area of the coalfield outcrop would be basically the same to the spontaneous combustion area in the goaf,but the lowest temperature occurred would be different,the lowest temperature of the coal absorption gas would be high and the lowest temperature coal oxidized gas would be low. Based on the relation equation and R2,the temperature and development status of the outcrop fire area in the coalfield could be easily predicted.

关 键 词：煤田露头火区 标志性气体 火区温度 格氏火灾系数 

分 类 号：TD75[矿业工程—矿井通风与安全]