摘要
以姜家湾煤矿11号煤层为研究对象,采用煤工业性分析、煤自燃倾向性色谱吸氧鉴定、差示扫描量热与气体示踪等实验手段,测定了该煤层工业性成分、煤自然发火倾向等级、不同温度煤的比热以及煤自燃指标气体,以此综合确定该煤层最短自然发火期。研究结果表明:煤的水分含量为0.90%,灰分含量为6.58%,挥发分含量为29.02%;煤层自燃倾向性等级属于Ⅰ类,自燃倾向性为易自燃。煤升温加热氧化的临界温度为162℃,且以CO为煤自燃评判的敏感气体。基于该煤层煤自燃特性,结合煤自燃发火数学模型,计算出该煤层最短自然发火期为48 d。该数据可为11号煤层开采速率以及采空区自燃发火防控提供技术参数支撑。
Taking the No.11 coal seam of Jiangjiawan Coal Mine as the research object,experimental ways such as coal industrial analysis,coal spontaneous combustion tendency chromatographic oxygen absorption identification,differential scanning calorimetry and gas tracing are used to determine the industrial composition,coal spontaneous combustion tendency level,specific heat of coal at different temperatures,and coal spontaneous combustion indicator gas of this coal seam.Based on this,the shortest spontaneous combustion period of this coal seam is comprehensively determined.The research results show that the moisture content of coal is 0.90%,the ash content is 6.58%,and the volatile content is 29.02%;The tendency level of coal seam spontaneous combustion belongs to Class I,and the natural tendency is prone to spontaneous combustion.The critical temperature for coal heating and oxidation is 162℃,and CO is the sensitive gas for evaluating coal spontaneous combustion.Based on the spontaneous combustion characteristics of this coal seam and combined with the mathematical model of coal spontaneous combustion,the shortest spontaneous combustion period of this coal seam is calculated to be 48 days.This data can provide technical parameter support for the mining rate of the No.11 coal seam and the prevention and control of spontaneous combustion in the goaf.
作者
崔佳楠
Cui Jianan(Jinneng Holding Group Dimei Datong Co.,Ltd.,Shanxi Datong 037000)
出处
《山东煤炭科技》
2024年第2期78-82,共5页
Shandong Coal Science and Technology
关键词
最短自然发火期
自然发火
自然标志气体
升温实验
the shortest spontaneous combustion period
spontaneous combustion
natural marker gas
heating experiment
