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[1]孙可明,罗国年,王传绳.采空区注超临界CO2防灭火试验研究[J].中国安全生产科学技术,2019,15(5):117-122.[doi:10.11731/j.issn.1673-193x.2019.05.019]
　SUN Keming,LUO Guonian,WANG Chuansheng.Experimental study on injecting supercritical CO2 into goaf for fire prevention and extinguishment[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(5):117-122.[doi:10.11731/j.issn.1673-193x.2019.05.019]
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采空区注超临界CO2防灭火试验研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年5期
页码:
117-122
栏目:
职业安全卫生管理与技术
出版日期:
2019-05-31

文章信息/Info

Title:
Experimental study on injecting supercritical CO2 into goaf for fire prevention and extinguishment
文章编号:
1673-193X(2019)-05-0117-06
作者:
孙可明1; 罗国年1; 王传绳2
（1.辽宁工程技术大学 力学与工程学院，辽宁 阜新 123000；
2.山西煤炭运销集团晋城有限公司，山西 晋城 048000）
Author(s):
SUN Keming1;  LUO Guonian1;  WANG Chuansheng2
(1. School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China;
2. Shanxi Coal Transportation and Marketing Group Jincheng Co., Ltd., Jincheng Shanxi 048000, China)
关键词:
采空区; 残煤自燃; 超临界CO2; 防灭火; 降温能力
Keywords:
goaf;  spontaneous combustion of residual coal;  supercritical CO2;  fire prevention and extinguishment;  cooling ability
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2019.05.019
文献标志码:
A
摘要:
为研究超临界CO2注入采空区防灭火的规律，自主研制了产生超临界CO2和模拟采空区遗煤自燃升温试验系统，得到了不同温压条件下超临界CO2注入采空区前后不同监测点的温度、O2和CO浓度变化数据信息。试验结果表明：注入采空区的超临界CO2发生相变，有序结构急速失序，大量吸收热量，采空区内的煤体、空气温度随时间呈线性快速下降规律，其降温能力是气态N2的10倍；超临界CO2在自燃发火煤体中的强渗透扩散特性，使自燃煤体快速惰化，防灭火效率高；停止注入后，小范围回温符合反二次函数特征；高压力超临界CO2相对于低压条件，防灭火性能更佳；超临界CO2是1种降温降氧能力显著，且输送性能优良的采空区新型防灭火材料，超临界CO2防灭火效果优于气态N2。
Abstract:
To reveal the fire prevention and extinguishment laws by injecting supercritical CO2 into the goaf, an experimental system for producing supercritical CO2 and simulating the spontaneous combustion of residual coal in goaf was developed independently. The data of temperature, oxygen concentration and CO concentration variation at different monitoring points before and after injecting supercritical CO2 into goaf under different temperature and pressure conditions were obtained. The results showed that the supercritical CO2 injected into the goaf occurred the phase transition, the ordered structure disordered rapidly, a large amount of heat was absorbed, and the temperature of coal and air in the goaf presented the linearly rapid decline with time, whose cooling ability was 10 times that of gaseous nitrogen. The strong permeability and diffusion characteristics of supercritical CO2 in the coal with spontaneous combustion made the coal inert quickly, with the high efficiency of fire prevention and extinguishment. After stopping the injection, the rebound temperature in a small range conformed to the feature of inverse quadratic function. The highpressure supercritical CO2 had better fire prevention and extinguishment performance compared with the lowpressure condition. The supercritical CO2 is a new material for fire prevention and extinguishment in goaf with significant cooling and oxygenreducing abilities and excellent transportation performance, with the better fire prevention and extinguishment effect than the gaseous nitrogen.

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备注/Memo

备注/Memo:
收稿日期： 2019-02-25；数字出版日期： 2019-05-23
基金项目： 国家自然科学基金项目（51574137）；辽宁省教育厅一般项目（LJYL047）
作者简介： 孙可明，博士，教授，主要研究方向为渗流理论及工程应用。
更新日期/Last Update: 2019-06-11