|本期目录/Table of Contents|

[1]徐永亮,左宁,梁浦浦,等.单轴应力对煤自燃特性参数和导热系数的影响研究[J].中国安全生产科学技术,2018,14(4):32-38.[doi:10.11731/j.issn.1673-193x.2018.04.005]
 XU Yongliang,ZUO Ning,LIANG Pupu,et al.Study on influence of uniaxial stress on spontaneous combustion characteristic parameters and thermal conductivity of coal[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(4):32-38.[doi:10.11731/j.issn.1673-193x.2018.04.005]
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单轴应力对煤自燃特性参数和导热系数的影响研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年4期
页码:
32-38
栏目:
学术论著
出版日期:
2018-04-30

文章信息/Info

Title:
Study on influence of uniaxial stress on spontaneous combustion characteristic parameters and thermal conductivity of coal
文章编号:
1673-193X(2018)-04-0032-07
作者:
徐永亮123左宁1梁浦浦1荆国松1王兰云1余明高1
(1.河南理工大学 安全科学与工程学院,河南 焦作 454003;2.河南理工大学 河南省瓦斯地质与瓦斯治理重点实验室—省部共建国家重点实验室培育基地,河南 焦作 454003;3.煤炭安全生产河南省协同创新中心,河南 焦作 454003)
Author(s):
XU Yongliang123 ZUO Ning1 LIANG Pupu1 JING Guosong1 WANG Lanyun1 YU Minggao1
(1.College of Safety Science and Engineering, Henan Polytechnic University,Jiaozuo Henan 454003,China;2.State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo Henan 454003,China;3.Collaborative Innovation Center of Coal Safety Production of Henan Province,Jiaozuo Henan 454003,China)
关键词:
单轴应力临界温度表观活化能导热系数
Keywords:
uniaxial stress critical temperature apparent activation energy thermal conductivity
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2018.04.005
文献标志码:
A
摘要:
为探究单轴应力作用下煤氧化和传热特性,利用自制荷载加压煤自燃特性参数测定装置对炉体内长焰煤煤样进行程序升温。结合程序升温过程中煤临界温度Tc和Tg,对其进行阶段划分:阶段1为30℃~Tc;阶段2为Tc~Tg。计算了不同单轴应力下2个阶段煤表观活化能和平均耗氧速率。根据能量守恒得出程序升温过程煤导热系数随温度的变化,进一步分析煤导热系数与单轴应力的关系。结果表明:阶段1单轴应力为4 MPa时为临界轴压,煤表观活化能最大,平均耗氧速率最小;阶段2煤表观活化能和平均耗氧速率随单轴应力增大均呈抛物线变化,单轴应力为2.7 MPa时为临界轴压,煤表观活化能最大,平均耗氧速率最小;阶段1和2煤导热系数随温度升高均先减小后增大,并且煤导热系数随单轴应力增大呈三次函数变化。
Abstract:
In order to study the characteristics of oxidation and heat transfer of coal under the uniaxial stress,the temperature programmed experiments were carried out on the coal samples of long flame coal by using the self-developed measurement device for the spontaneous combustion characteristic parameters of coal based on the load pressure. Combined with the critical temperatures Tc and Tg of coal in the temperature programmed process,its stage division was carried out,namely the stage 1 was from 30℃ to Tc,and the stage 2 was from Tc to Tg. The apparent activation energy and the average oxygen consumption rate of coal in two stages under different uniaxial stress were calculated. The variation of thermal conductivity of coal with temperature in the temperature programmed process was obtained according to the energy conservation,then the relationship between the thermal conductivity of coal and the uniaxial stress was analyzed. The results showed that in stage 1,the uniaxial stress of 4 MPa was the critical axial compression,and at this point,the apparent activation energy of coal was the largest,the average oxygen consumption rate was the least. While in stage 2,the apparent activation energy and the average oxygen consumption rate of coal presented the parabolic variation with the increase of uniaxial stress,the uniaxial stress of 2.7 MPa was the critical axial compression,and at this point,the apparent activation energy of coal was the largest,the average oxygen consumption rate was the least. Both in stage 1 and stage 2,the thermal conductivity of coal decreased first and then increased with the increase of temperature,and the thermal conductivity of coal presented the cubic function variation with the increase of uniaxial stress.

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相似文献/References:

备注/Memo

备注/Memo:
国家自然科学基金项目(51304071);中国博士后科学基金面上项目(2017M612397);河南省高等学校重点科研项目(18A440005);河南省科技攻关项目(182102310771)
更新日期/Last Update: 2018-05-08