Modeling the Influence of Wall Roughness on Tunnel Propagation

Details

• Personal Author:
  Waynert J ; Zhou C
• Description:
  At the ultra-high frequencies (UHF) common to portable radios, a mine tunnel is often modeled as a hollow dielectric waveguide. The roughness condition of the tunnel walls has an influence on radio propagation and therefore should be taken into account when accurate power predictions are required. In this paper, we derive a general analytical formula for modeling the influence of the wall roughness. The formula can model practical tunnels formed by four dielectric walls, with each having an independent roughness condition. It is found that different modes are attenuated by the same wall roughness in a different way, with higher order modes being significantly more attenuated compared to the dominant mode. The derivation and findings are verified by numerical results based on both ray tracing and modal methods. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Radio Waves Safety
• Keywords:
  Analytical-processes Electromagnetic-wave-transmission Mining-industry Radio-waves Underground-mining
• Series:
  Mining Publications
• ISBN:
  9781479921812
• ISSN:
  2164-2958
• Publisher:
  Institute of Electrical and Electronics Engineers (IEEE)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  109-111
• NIOSHTIC Number:
  nn:20044334
• Citation:
  IEEE Radio and Wireless Symposium (RWS 2014), January 19-23, 2014, Newport Beach, California, USA. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2014 Jan; :109-111
• Contact Point Address:
  Chenming Zhou, Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, Pittsburgh, PA 15236, USA
• Email:
  czhou@cdc.gov
• Federal Fiscal Year:
  2014
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  IEEE Radio and Wireless Symposium (RWS)
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:63ff7f5079bf30c900db04db980377429f62d6e7e2be7cbe0453735af38f4bd4da284be2cd26288b13dca5b0c389e020a667ccc143617c3b6aa20b348149f5ca
• Download URL:
  https://stacks.cdc.gov/view/cdc/228048/cdc_228048_DS1.pdf
• File Type:
  [PDF - 343.44 KB ]