井下金属结构等效接收天线的放电火花安全性研究

刘晓阳, 马新彦, 田子建, 陈伟, 王帅, 胡宗群

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.. DOI: 10.13272/j.issn.1671-251x.2021040106
引用本文: 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.. DOI: 10.13272/j.issn.1671-251x.2021040106
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LIU Xiaoyang, MA Xinyan, TIAN Zijian, CHEN Wei, WANG Shuai, HU Zongqun. Research on discharge spark safety of equivalent receiving antenna of underground metal structure[J]. Journal of Mine Automation, 2021, 47(9): 126-130.. DOI: 10.13272/j.issn.1671-251x.2021040106
Citation: LIU Xiaoyang, MA Xinyan, TIAN Zijian, CHEN Wei, WANG Shuai, HU Zongqun. Research on discharge spark safety of equivalent receiving antenna of underground metal structure[J]. Journal of Mine Automation, 2021, 47(9): 126-130.. DOI: 10.13272/j.issn.1671-251x.2021040106
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井下金属结构等效接收天线的放电火花安全性研究

  • 1.

    中国矿业大学(北京) 机电与信息工程学院， 北京100083

  • 2.

    中煤信息技术(北京)有限公司， 北京100029

基金项目: 

国家自然科学基金资助项目(52074305)

中央高校基本科研业务费专项资金项目(2021YJSJD19)

详细信息

  • 中图分类号: TD655/712

Research on discharge spark safety of equivalent receiving antenna of underground metal structure

  • 1.

    School of Mechanical Electronic and Information Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China

  • 2.

    China Coal Information Technology(Beijing) Co., Ltd., Beijing 100029, China

摘要

    摘要
  • 摘要: 煤矿井下巷道内分布的金属结构可等效为接收天线吸收电磁波能量，并在特定条件下以放电火花形式释放能量，积聚的能量存在点燃爆炸性气体的风险。针对该问题，分析了金属结构等效为接收天线时放电火花点燃瓦斯气体的条件，推导出放电火花作为负载可吸收最大功率的计算表达式，得出瓦斯气体体积分数为8.5%时，金属结构等效为接收天线情况下放电火花不会点燃瓦斯气体的最大允许功率为2.8 W。通过Wireless Insite电磁仿真软件对射频设备不同工作条件下放电火花作为负载可吸收最大功率进行仿真，结果表明：射频设备输出功率越大、射频设备工作频率越小、金属结构距离射频设备越近，负载可吸收最大功率越大，放电火花点燃瓦斯气体的安全隐患越大；射频设备的发射天线与金属结构之间安全距离最小为0.1 m时，金属结构在射频设备工作频率800 MHz以下频段的射频电磁辐射能量下产生的放电火花存在点燃瓦斯气体的可能，金属结构在射频设备工作频率890 MHz以上频段的射频电磁辐射能量下产生的放电火花是本质安全的，不会点燃瓦斯气体。
    Abstract: The metal structures distributed in underground coal mine roadways can be equivalent to the receiving antenna to absorb electromagnetic wave energy and release the energy in the form of discharge sparks under specific conditions. The accumulated energy has the risk of igniting explosive gas. In order to solve the problem, the conditions of ignition of gas by discharge spark when the metal structure is equivalent to the receiving antenna are analyzed, and the calculation expression of the maximum power that can be absorbed by the discharge spark as load is derived. It is concluded that when the gas volume fraction is 8.5% and the metal structure is equivalent to the receiving antenna, the maximum allowable power that the discharge spark will not ignite the gas is 2.8 W. Wireless Insite electromagnetic simulation software is used to simulate the maximum power that can be absorbed by the discharge spark as load under different working conditions of the radio frequency equipment. The results show that the greater the output power of radio frequency equipment, the lower the working frequency of radio frequency equipment, the closer the metal structure to radio frequency equipment, the greater the load maximum power that can be absorbed, the greater the potential safety hazard of gas ignited by discharge spark. When the minimum safety distance between the transmitting antenna of the radio frequency equipment and the metal structure is 0.1 m, the discharge sparks generated by the radio frequency electromagnetic radiation energy in the frequency band below 800 MHz of the radio frequency equipment have the possibility of igniting gas. The discharge sparks generated by the radio frequency electromagnetic radiation energy in the frequency band above 890 MHz of the radio frequency equipment in the metal structure are intrinsically safe and will not ignite gas.
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出版历程
  • 发布日期:  2021-09-19
  • 刊出日期:  2021-12-28

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