煤矿安全2024，Vol.55Issue(1)：132-138,7.DOI:10.13347/j.cnki.mkaq.20230342
低变质煤CO来源及防控技术研究
Study on CO source and control technology of low metamorphic coal
王永敬 1王坤 2陈洋 2师吉林 2秦乐静3
作者信息
- 1. 煤炭科学研究总院,北京 100013||中煤科工集团沈阳研究院有限公司,辽宁 抚顺 113122||煤矿安全技术国家重点实验室,辽宁 抚顺 113122
- 2. 中煤科工集团沈阳研究院有限公司,辽宁 抚顺 113122||煤矿安全技术国家重点实验室,辽宁 抚顺 113122
- 3. 中国矿业大学(北京),北京 100083
- 折叠
摘要
Abstract
In order to explore the source of low metamorphic coal CO source and reduce the risk of natural fire in the coal seam,Tak-ing the 3#coal seam of Dananhu No.1 mine as the research object,the CO generation rule in the CO occurrence,mining and cutting of the 3#coal seam and the CO source ratio in the corner of the return air are studied by means of temperature programming experi-ment,experiment simulation and field observation.The results show that when coal is pulverized without oxygen,a large number of functional groups and free radicals generated by the covalent bond fracture of coal molecules interact to produce a very small amount of CO.When coal is pulverized under oxygen,a large amount of CO is produced.With the increase of specific surface area of coal samples,the volume fraction of CO increases and eventually becomes stable.The coal cutting machine produces high temperature,which oxidizes the coal body and produces CO volume fraction of 30-50 ppm.The CO from the goaf accounts for 28%of the total integral number of the CO from the return air corner,and more than 70%of the CO comes from the oxidation of the crushed coal after the production period.According to the CO source of low metamorphic coal,comprehensive prevention and control measures such as spraying CO compound inhibitor after the frame,pressure injection of cold nitrogen in goaf and air leakage plugging have been taken to reduce CO volume fraction in return air corner and return air flow significantly.关键词
低变质煤/自然发火/程序升温/CO赋存/复合抑制剂Key words
low metamorphic coal/spontaneous combustion/temperature programming/CO occurrence/composite inhibitor分类
矿业与冶金引用本文复制引用
王永敬,王坤,陈洋,师吉林,秦乐静..低变质煤CO来源及防控技术研究[J].煤矿安全,2024,55(1):132-138,7.
