摘要
采用程序升温方法分析不同粒径实验煤样在自燃氧化过程中的气体发生发展规律,从而确定自然堆积松散煤体(由不同粒径组成)的自燃气体指标及其临界值,为建立曙光煤矿2号煤层采空区遗煤自然发火的预测预报气体指标体系提供实验依据。实验结果表明:CO气体的出现显示煤体进入自燃氧化状态,当温度超过80℃后,CO浓度呈现指数型增长,且粒径越小CO浓度越大;C_(2)H_(4)、C_(3)H_(8)气体的出现可以作为煤体进入到快速氧化阶段的重要判定指标,CO/CO_(2)、C_(2)H_(4)/CH_(4)值可以作为煤自燃高温阶段的辅助判定指标,研究结果为曙光煤矿2号煤层采空区遗煤自燃氧化状态的预测预报及主动防控提供了理论依据。
The gas generation and development law of the experimental coal samples with different particle sizes during the spontaneous combustion oxidation process was analyzed by the temperature-programmed method,so as to determine the spontaneous combustion gas index and its critical value of the naturally accumulated loose coal body(composed of different particle sizes),in order to establish the Shuguang Coal Mine prediction and forecasting gas index system of the coal remaining coal in the goaf of No.2 coal.The experimental results showed that the appearance of CO gas indicates that the coal body had entered a state of spontaneous combustion and oxidation.When the temperature exceeds 80℃,the CO concentration increased exponentially,and the smaller the particle size,the higher the CO concentration;C_(2)H_(4),C_(3)H_(8) the appearance of gas could be used as an important judgment index for the coal body to enter the rapid oxidation stage,and the values of CO/CO_(2) and C_(2)H_(4)/CH_(4) could be used as an auxiliary judgment index for the high temperature stage of coal spontaneous combustion.The research results provided a theoretical basis for the prediction,prediction and active prevention and control of the spontaneous combustion and oxidation state of residual coal in the gob of No.2 coal seam in Shuguang Coal Mine.
作者
杜学明
李鹏龙
周全超
许慧骞
乔磊
杨胜强
DU Xue-ming;LI Peng-long;Zhou Quan-chao;XU Hui-qian;QIAO Lei;YANG Sheng-qiang(Shuguang Coal Mine,Fenxi Mining Industry,Xiaoyi 032000,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Coal Resource and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤炭科技》
2022年第1期43-48,共6页
Coal Science & Technology Magazine
基金
中国矿业大学双一流建设自主创新专项——新能源与非常规能源开发(2018ZZCX05)
国家重点研发计划项目——煤矿热动力灾害防控技术与装备(2018YFC0807900)。
关键词
煤自燃
不同粒径
指标气体
预测预报
coal spontaneous combustion
different particle size
index gas
prediction
