Volume 50 Issue 3
Mar.  2024
Turn off MathJax
Article Contents
Article Navigation >  Journal of Mine Automation  > 2024  >  50(3): 108-113
GUO Bochao, TIAN Zijian, HOU Mingshuo, et al. Research on safety of electromagnetic wave thermal effect in explosive environment of underground coal mine[J]. Journal of Mine Automation，2024，50（3）：108-113.  doi: 10.13272/j.issn.1671-251x.2023120069
Citation: GUO Bochao, TIAN Zijian, HOU Mingshuo, et al. Research on safety of electromagnetic wave thermal effect in explosive environment of underground coal mine[J]. Journal of Mine Automation，2024，50（3）：108-113.  doi: 10.13272/j.issn.1671-251x.2023120069
shu

Research on safety of electromagnetic wave thermal effect in explosive environment of underground coal mine

doi: 10.13272/j.issn.1671-251x.2023120069
  • 1.

    School of Artificial Intelligence, China University of Mining and Technology-Beijing, Beijing 100083, China

  • 2.

    School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China

  • Received Date: 2023-12-24
  • Rev Recd Date: 2024-03-26
    • Available Online: 2024-04-11
    Abstract
  • GB/T 3836.1-2021 Explosive atmospheres-Part 1: Equipment-General requirements stipulates that the threshold power of RF equipment in explosive environments shall not exceed 6 W. This regulation limits the application of high-power RF equipment in coal mines. However, existing research on electromagnetic safety in explosive environments lacks comprehensive theoretical analysis and experimental verification. In order to solve the above problems, the electromagnetic wave thermal effect equation is derived. It is analyzed that the controllable parameters affecting the generation of thermal energy from the mixture of gas and coal dust coupled by electromagnetic waves are the electromagnetic wave coupling time, the electric field strength and the electromagnetic wave frequency. Based on the regulation in GB/T 3836.1-2021 that the maximum surface temperature of electrical equipment that may accumulate coal dust cannot exceed 150 ℃, simulation experiments are conducted using the multi physics field simulation software COMSOL to evaluate the thermal safety of gas and coal dust mixtures coupled with electromagnetic waves of different emission powers. The results show that the emission power that meets the safety threshold of electromagnetic wave thermal effect with a temperature not exceeding 150 ℃ is 16.48 W. With the increase of electromagnetic wave emission power, the safe duration of electromagnetic wave thermal effect (the corresponding time period that the thermal energy generated by the mixed gas of electromagnetic wave coupling gas and coal dust not causing the ambient temperature to exceed 150 ℃) gradually decreases. However, as long as the safe duration is maintained, the emission power of electromagnetic waves is not limited.

     

    • FullText(HTML)
  • loading
    • References(25)
  • [1]
    GB/T 3836.1—2021 爆炸性环境 第1部分:设备 通用要求[S].

    GB/T 3836.1-2021 Explosive atmospheres-Part 1:Equipment-General requirements[S].
    [2]
    孙继平,彭铭,潘涛,等. 无线电波防爆安全阈值研究[J]. 工矿自动化,2023,49(2):1-5.

    SUN Jiping,PENG Ming,PAN Tao,et al. Research on the safety threshold of radio wave explosion-proof[J]. Journal of Mine Automation,2023,49(2):1-5.
    [3]
    梁伟锋,孙继平,彭铭,等. 煤矿井下无线电波防爆安全功率阈值研究[J]. 工矿自动化,2022,48(12):123-128,163.

    LIANG Weifeng,SUN Jiping,PENG Ming,et al. Research on safe power threshold of radio wave explosion-proof in coal mine[J]. Journal of Mine Automation,2022,48(12):123-128,163.
    [4]
    田子建,降滉舟,常琳,等. 半波振子结构在井下5G辐射场中的安全性分析[J]. 工矿自动化,2023,49(6):159-167.

    TIAN Zijian,JIANG Huangzhou,CHANG Lin,et al. Safety analysis of half wave oscillator structure in underground 5G radiation field[J]. Journal of Mine Automation,2023,49(6):159-167.
    [5]
    刘晓阳,马新彦,刘坤,等. 矿井5G电磁波辐射能量安全性研究[J]. 工矿自动化,2021,47(7):85-91.

    LIU Xiaoyang,MA Xinyan,LIU Kun,et al. Research on the safety of 5G electromagnetic wave radiation energy in coal mine[J]. Industry and Mine Automation,2021,47(7):85-91.
    [6]
    刘晓阳,马新彦,田子建,等. 井下金属结构等效接收天线的放电火花安全性研究[J]. 工矿自动化,2021,47(9):126-130.

    LIU Xiaoyang,MA Xinyan,TIAN Zijian,et al. Research on discharge spark safety of equivalent receiving antenna of underground metal structure[J]. Industry and Mine Automation,2021,47(9):126-130.
    [7]
    常琳,郑慧莹,李鸣. 煤矿5G通信系统的安全性研究[J]. 煤矿安全,2021,52(8):137-141,146.

    CHANG Lin,ZHENG Huiying,LI Ming. Research on safety of 5G communication system in coal mine[J]. Safety in Coal Mines,2021,52(8):137-141,146.
    [8]
    范思涵,杨维,刘俊波. 井下金属结构近场耦合大环发射天线电磁波能量安全性分析[J]. 工矿自动化,2022,48(6):118-127.

    FAN Sihan,YANG Wei,LIU Junbo. Analysis of electromagnetic wave energy safety of underground metal structure near-field coupled large loop transmitting antenna[J]. Journal of Mine Automation,2022,48(6):118-127.
    [9]
    范思涵,杨维,田子建. 井下柱状金属结构接收电磁波能量安全性分析[J/OL]. 煤炭科学技术:1-9[2023-12-22]. http://kns.cnki.net/kcms/detail/11.2402.TD.20231206.1855.003.html.

    FAN Sihan,YANG Wei,TIAN Zijian. Safety analysis of electromagnetic wave energy received by underground columnar metal structures[J/OL]. Coal Science and Technology:1-9[2023-12-22]. http://kns.cnki.net/kcms/detail/11.2402.TD.20231206.1855.003.html.
    [10]
    伍颖. 煤矿井下电磁波远场辐射能量对瓦斯气体的安全性分析[D]. 北京:北京交通大学,2022.

    WU Ying. Safety analysis of electromagnetic wave far field radiation energy on gas in coal mine[D]. Beijing:Beijing Jiaotong University,2022.
    [11]
    夏晨阳,庄裕海,卢振洲,等. 高瓦斯矿井无线供电系统安全容量研究[J]. 电工技术学报,2013,28(增刊2):71-74.

    XIA Chenyang,ZHUANG Yuhai,LU Zhenzhou,et al. Research of safety capability of wireless power supply system used in high gas mine[J]. Transactions of China Electrotechnical Society,2013,28(S2):71-74.
    [12]
    孟积渐,陈永冉. 煤矿井下无线充电安全影响因素分析及对策[J]. 煤矿安全,2020,51(12):109-112.

    MENG Jijian,CHEN Yongran. Analysis of influencing factors of wireless charging safety in underground coal mine and countermeasures[J]. Safety in Coal Mines,2020,51(12):109-112.
    [13]
    GAO Jiancun,WANG Le,HU Shoutao,et al. The free radical mechanism of electromagnetic field affecting explosion of premixed methane[J]. Combustion and Flame,2021,234. DOI: 10.1016/j.combustflame.2021.111649.
    [14]
    SU Chang,ZHANG Yongli,YANG Xinle,et al. Numerical simulation of the temperature field of coal subjected to microwave directional heating[J]. IEEE Access,2020,8:45084-45095. doi: 10.1109/ACCESS.2020.2978213
    [15]
    工业和信息化部. 工业和信息化部关于印发无线充电(电力传输)设备无线电管理暂行规定的通知[EB/OL]. [2023-10-22]. https://www.gov.cn/gongbao/2023/issue_10626/202308/content_6897062.html.

    Ministry of Industry and Information Technology. Notice of the Ministry of Industry and Information Technology on issuing Interim Regulations on Radio Management of Wireless Charging (Power Transmission) Equipment[EB/OL]. [2023-10-22]. https://www.gov.cn/gongbao/2023/issue_10626/202308/content_6897062.html.
    [16]
    MOLDOVER M R,BUCKLEY T J. Reference values of the dielectric constant of natural gas components determined with a cross capacitor[J]. International Journal of Thermophysics,2001,22(5):859-885.
    [17]
    SCHMIDT J W,MOLDOVER M R. Dielectric permittivity of eight gases measured with cross capacitors[J]. International Journal of Thermophysics,2003,24(2):375-403. doi: 10.1023/A:1022963720063
    [18]
    孙敦帅. 抽采煤层瓦斯运移分布的电阻率动态响应特征研究[D]. 徐州:中国矿业大学,2023.

    SUN Dunshuai. Characterization of resistivity dynamic response of gas transport distribution in extracted coal seam[D]. Xuzhou:China University of Mining and Technology,2023.
    [19]
    汤小燕,陈昕怡,郑雷清,等. 含瓦斯煤岩导电特性研究综述[J]. 科学技术与工程,2023,23(25):10617-10624.

    TANG Xiaoyan,CHEN Xinyi,ZHENG Leiqing,et al. Review and prospect of conductive characteristics of gas-containing coal rocks[J]. Science Technology and Engineering,2023,23(25):10617-10624.
    [20]
    陈立,张英华,黄志安,等. 不同粒径煤吸附瓦斯过程中的热电效应[J]. 工程科学学报,2018,40(4):416-426.

    CHEN Li,ZHANG Yinghua,HUANG Zhi'an,et al. Thermoelectric effect in process of gas adsorption in different particle sizes of coal[J]. Chinese Journal of Engineering,2018,40(4):416-426.
    [21]
    杨耸. 受载含瓦斯煤体电性参数的实验研究[D]. 焦作:河南理工大学,2012.

    YANG Song. Experimental study on the electrical parameters of being loaded gas-filled coal[D]. Jiaozuo:Henan Polytechnic University,2012.
    [22]
    李祥春,张琪,安振兴,等. 不同煤体电性参数影响因素实验研究[J]. 中国矿业大学学报,2021,50(3):570-578.

    LI Xiangchun,ZHANG Qi,AN Zhenxing,et al. Experimental study of influencing factors of electrical parameters of different kinds of coal mass[J]. Journal of China University of Mining and Technology,2021,50(3):570-578.
    [23]
    GORODILOV B G,SUMAROKOV V V,JEŻOWSKI A,et al. Thermal conductivity of O2-and N2-doped solid CH4[J]. Journal of Low Temperature Physics,2001,122:187-193. doi: 10.1023/A:1004872011475
    [24]
    LIANG Zhi,TSAI H L. Molecular dynamics simulations of self-diffusion coefficient and thermal conductivity of methane at low and moderate densities[J]. Fluid Phase Equilibria,2010,297(1):40-45. doi: 10.1016/j.fluid.2010.06.008
    [25]
    王和堂,杨景皓,谭江龙,等. 难注水煤层液态CO2加注多场耦合演化规律研究[J/OL]. 煤炭科学技术:1-12[2024-03-28]. http://kns.cnki.net/kcms/detail/11.2402.TD.20231107.0841.001.html.

    WANG Hetang,YANG Jinghao,TAN Jianglong,et al. Research on multi-field coupling evolution law of liquid CO2 filling in difficult water injection seams[J/OL]. Coal Science and Technology:1-12[2024-03-28]. http://kns.cnki.net/kcms/detail/11.2402.TD.20231107.0841.001.html.
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(3)  / Tables(6)

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (108) PDF downloads(12) Cited by()
    Proportional views
    Related

    苏ICP备 05016349号-2

    Supported by: Beijing Renhe Information Technology Co. Ltd.  Visits：    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return