煤矿安全2025，Vol.56Issue(5)：114-120,7.DOI:10.13347/j.cnki.mkaq.20240400
水浸煤自然发火特性研究
Study on spontaneous combustion characteristics of water-soaked coal
摘要
Abstract
In order to investigate the influence degree of water-soaked coal with different moisture contents on coal spontaneous combustion,coal samples with different moisture contents are prepared,programmed temperature experiment was used to test the thermal weight and CO production rate of coal samples,and SEM(Scanning Electron Microscope)was used to observe the surface morphology characteristics of coal samples with different moisture contents.The results show that moisture can change the thermal decomposition characteristics of coal;when the moisture content of coal is 6%-14%,the temperature required for coal spontaneous combustion decreases with the increase of moisture content,which reduces the process of coal spontaneous combustion;when the moisture content of coal is 14%-36%,the temperature required for coal spontaneous combustion increases with the increase of mois-ture content,which prolongs the process of coal spontaneous combustion.The study also found that moisture can affect the oxida-tion characteristics of coal,when the moisture content is lower than a certain value,increasing the moisture content of coal can pro-mote the release of CO and facilitate the spontaneous combustion of coal;when the moisture content is higher than a certain value,increasing the moisture content of coal can inhibit the release of CO and hinder the spontaneous combustion of coal;coal with a moisture content of about 14%is the most prone to spontaneous combustion.In addition,moisture content had a dual effect on the development of coal pores.With the increase of moisture content,the pores and cracks of coal increased,but when the moisture con-tent reached a certain level,the pores and cracks of coal were filled with water,suppressing the expansion and generation of coal cracks.关键词
水浸煤/自然发火/程序升温/氧化速率/含水率Key words
water-soaked coal/spontaneous combustion/temperature programming/oxidation rate/moisture content分类
矿山工程引用本文复制引用
陈竹,徐明伟,李昊斌,白亮,杨永亮,杨尚学,李雅阁..水浸煤自然发火特性研究[J].煤矿安全,2025,56(5):114-120,7.基金项目
国家自然科学基金资助项目(52004293) （52004293）
