煤自燃程序升温实验及其在实验教学中的应用  

Experiment on the programmed temperature rise in a spontaneous combustion of coal and its application in experimental teaching

作　　者：王刚[1,2] 杨宝东 徐浩[1] 孙路路[1] 黄启铭[1] WANG Gang;YANG Baodong;XU Hao;SUN Lulu;HUANG Qiming(College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;National Demonstration Center for Experimental Teaching Mining Engineering Education,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学安全与环境工程学院,山东青岛266590 [2]山东科技大学矿业工程国家级实验教学示范中心,山东青岛266590

出　　处：《实验技术与管理》2024年第3期225-231,共7页Experimental Technology and Management

基　　金：山东省本科教学改革研究项目(Z2023073);山东省研究生教育教学改革研究项目(SDYJSJGC2023023);山东科技大学优秀教学团队培育计划项目(TD20231203);山东科技大学青年教师教学拔尖人才培养计划项目(BJ20211113);山东科技大学教育教学研究“群星计划”项目(QX2022ZD01)。

摘　　要：该文利用程序升温实验系统,对三种氧气浓度(20.9%、10%和7%)所代表的采空区散热带、氧化带、窒息带进行了煤样自燃发火实验,采集了不同温度阶段的气体产物,分析了温度及氧气浓度对气体产物浓度的影响,并对指标气体进行了详细分类和评估。实验结果表明:交叉点温度CPT随着氧气浓度的升高而降低,干空气的交叉点温度为144.6℃,由经验关系计算得到的CPT值与实验数据相差仅6.08%;氧气浓度越高,临界温度越低,所产生的气体浓度越高;CO气体在不同的含氧环境下都是主要的氧化产物,可作为判断煤自燃发火的主要指标,C_(2)H_(4)和C_(3)H_(6)的产生表示煤体进入加速氧化状态,可作为判断煤自燃发火的辅助指标。[Objective]As the main energy source in China,coal has an important strategic position in the country’s economic development.China’s coal-based energy structure model will not change in the short term,but coal mine accidents occur frequently.Mine fire is a major disaster that threatens safe coal mine production,which incurs huge economic losses and threatens the personal safety of miners and coal mine production.However,coal spontaneous combustion primarily causes mine fires.The occurrence mechanism of coal spontaneous combustion is highly complex and is affected by the inherent combustion characteristics of coal and external environmental factors.Therefore,it is necessary to comprehensively analyze various phenomena and characteristics in the process of coal spontaneous combustion and apply quantitative indicators to express to predict the risk and ensure the safe production of the mine.[Methods]Oxygen concentration is an important factor influencing coal oxidation reaction.In this paper,the temperature-programmed experimental system is used to conduct the spontaneous combustion experiment of coal samples with three oxygen concentrations of 20.9%,10%,and 7%regarding the heat dissipation,oxidation,and asphyxiation zones in the goaf.The gas products at different temperature stages are collected,the effects of temperature and oxygen concentration on the concentration of gas products are analyzed,and the index gases are classified and evaluated in detail.[Results]The results show the following:(1)The cross-point temperature(CPT)decreases with the increase in the oxygen concentration.The cross-point temperature under dry-air conditions is 144.6℃.The error between the CPT value calculated by the BM empirical relationship and the experimental data is only 6.08%.The higher the oxygen concentration,the smaller the critical temperature,and the higher the gas concentration.(2)The content of oxidation products increases with the oxygen concentration.When heating commences,minimal CO and CH4 gases are generated,but wit

关 键 词：煤自燃 程序升温 氧气浓度 交叉点温度 指标体系 

分 类 号：TD752[矿业工程—矿井通风与安全] G642[文化科学—高等教育学]