摘要
采用实验分析和现场观测相结合的方法,研究了新疆乌苏四棵树七号井综放工作面煤层自燃倾向性、最短发火期,确定了自然发火指标气体,分析了工作面一氧化碳来源。研究认为,该矿A_5煤层应以一氧化碳作为自然发火初期的预测指标气体,以烯烃为辅助指标气体来判断煤的自燃程度。将一氧化碳作为30℃~130℃区间预测自燃的指标气体,一氧化碳出现时说明煤已经发生氧化反应;将烯烃作为130℃~200℃区间判断煤自燃程度的指标气体,乙烯、乙烷出现时说明煤温已达到130℃,丙烷出现时说明煤温已达到150℃。该矿A_(5)04工作面一氧化碳主要来源于本工作面采空区遗煤氧化(占88%),还有一部分来源于工作面两道超强深孔预裂爆破(占12%)。研究成果为矿井自然发火防治工作提供可靠的依据。
Using a combination of experimental analysis and on-site observation,the spontaneous combustion tendency and shortest ignition period of coal seams in the No.7 well of Sikeshu in Wusu,Xinjiang were studied,and the indicator gas for spontaneous combustion was determined.The source of carbon monoxide in the working face was analyzed.Research suggests that the A 5 coal seam in the mine should use CO as the predictive index gas for the initial stage of spontaneous combustion,and olefins as the auxiliary index gas to determine the degree of coal spontaneous combustion.Using CO as an index gas for predicting spontaneous combustion in the range of 30℃~130℃,the appearance of CO indicates that the coal has undergone oxidation reaction.Using olefins as an index gas to determine the degree of coal spontaneous combustion in the range of 130℃~200℃,the presence of ethylene and ethane indicates that the coal temperature has reached 130℃,and the presence of propane indicates that the coal temperature has reached 150℃.The CO in A_(5)04 working face of the mine mainly comes from the oxidation of residual coal in the goaf of this working face(accounting for 88%),and a part of it comes from two ultra strong deep hole pre splitting blasting in the working face(accounting for 12%).The research results provide a reliable basis for the prevention and control of natural combustion in mines.
作者
王正帅
WANG Zheng-shuai(CCTEG Chongqing Research Institute,Chongqing 400037,China)
出处
《煤炭科技》
2024年第2期89-93,共5页
Coal Science & Technology Magazine
关键词
煤自燃
指标气体
一氧化碳
来源
coal spontaneous combustion
index gas
CO
source
作者简介
王正帅(1988-),男,甘肃酒泉人,高级工程师,硕士,2014年毕业于西安科技大学采矿工程专业,现从事矿井灾害防治、矿山压力与岩层控制方面的研究工作。
