|本期目录/Table of Contents|

[1]张光耀,王飞.动态氧条件下煤低温氧化CO释放临界温度研究*[J].中国安全生产科学技术,2025,21(9):38-46.[doi:10.11731/j.issn.1673-193x.2025.09.005]
　ZHANG Guangyao,WANG Fei.Study on critical temperature for CO release during low-temperature oxidation of coal under dynamic oxygen conditions[J].Journal of Safety Science and Technology,2025,21(9):38-46.[doi:10.11731/j.issn.1673-193x.2025.09.005]
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动态氧条件下煤低温氧化CO释放临界温度研究*()

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
21
期数:
2025年9期
页码:
38-46
栏目:
学术论著
出版日期:
2025-09-30

文章信息/Info

Title:
Study on critical temperature for CO release during low-temperature oxidation of coal under dynamic oxygen conditions
文章编号:
1673-193X(2025)-09-0038-09
作者:
张光耀; 王飞
（1.太原理工大学 安全与应急管理工程学院，山西 太原 030024；
2.山西煤矿安全研究生教育创新中心，山西 太原 030024）
Author(s):
ZHANG Guangyao;  WANG Fei
(1.College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;
2.Shanxi Coal Mine Safety Graduate Education Innovation Center,Taiyuan Shanxi 030024,China)
关键词:
煤自燃; 临界温度; CO; 程序升温
Keywords:
coal spontaneous combustion;  critical temperature;  CO;  temperature-programmed
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2025.09.005
文献标志码:
A
摘要:
为了研究氧体积分数动态上升对煤低温氧化过程中CO释放规律以及临界温度的影响，以低变质长焰煤为研究对象，开展静态（固定O2 21%，13%，5%）与动态（O2以0.25%/min、0.20%/min和0.15%/min速率从5%升至21%）条件下的程序升温实验。研究结果表明：静态条件下，CO初始生成温度随氧体积分数降低而滞后，临界温度随氧体积分数升高而降低，21%O2时为72.88 ℃，5%时为78.02 ℃；动态条件下，氧体积分数上升速率越快，CO生成总量越高且临界温度越低；动态组50~80 ℃低温阶段CO生成量较静态组更高，煤自燃临界温度均低于静态组，0.25%/min升速时临界温度最低为67.39 ℃，较静态组最高温度降幅达13.6%。说明动态氧环境通过渐进增氧能削弱低氧抑制效应，煤自燃临界温度更低，自燃风险性更大。研究结果可为矿井采空区漏风致氧体积分数升高引发的自燃风险防控提供理论参考。
Abstract:
In order to investigate the effects of dynamically increasing oxygen volume fraction on the CO release patterns and critical temperature during low-temperature oxidation of coal,low-metamorphic long-flame coal was subjected to temperature-programmed experiments under both static (fixed oxygen volume fractions of 21%,13% and 5%) and dynamic (oxygen volume fractions increasing from 5% to 21% at rates of 0.25%/min,0.20%/min,and 0.15%/min) conditions.The results indicate that under static conditions,the initial CO generation temperature delayed with decreasing oxygen volume fraction,while the critical temperature decreases with increasing oxygen volume fraction,measuring 72.88 ℃ at 21% O2 and 78.02 ℃ at 5% O2.Under dynamic conditions,a faster rate of oxygen volume fraction increase leads to higher total CO production and lower critical temperatures.In the low-temperature range of 50~80 ℃,the dynamic groups produce more CO than the static groups,and the critical temperature for coal spontaneous combustion is lower in all dynamic groups.The lowest critical temperature is 67.39 ℃ at a rate of 0.25%/min,representing a decrease of up to 13.6% compared to the highest temperature in the static groups.This indicates that dynamic oxygen conditions mitigate the inhibitory effect of low oxygen through progressive oxygen increase,resulting in a lower critical temperature for coal spontaneous combustion and a higher risk of self-ignition.These findings provide a theoretical reference for preventing and controlling spontaneous combustion risks in mine goafs caused by air leakage leading to increased oxygen volume fraction.

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备注/Memo

备注/Memo:
收稿日期： 2025-05-30
* 基金项目： 山西省重点研发计划项目（201803D31053）；山西焦煤集团公司重大技术攻关资助项目（201812xs06）；爆炸科学与技术国家重点实验室（北京理工大学）2019年度开放基金项目（KFJJ19-03M）
作者简介： 张光耀，硕士研究生，主要研究方向为灾害防治理论与技术。
通信作者： 王飞，博士，教授，主要研究方向为灾害防治理论与技术。
更新日期/Last Update: 2025-09-30