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Mining Publication: Ray Tracing and Modal Methods for Modeling Radio Propagation in Tunnels With Rough Walls
Keywords: Modeling Radios Tunnels
Original creation date: May 2017
Authors: C Zhou
Peer Reviewed Journal Article - May 2017
Go to Web Page
NIOSHTIC2 Number: 20049833
IEEE Trans Antennas Propag 2017 May; 65(5):2624-2634
At the ultrahigh frequencies common to portable radios, tunnels such as mine entries are often modeled by hollow dielectric waveguides. The roughness condition of the tunnel walls has an influence on radio propagation, and therefore should be taken into account when an accurate power prediction is needed. This paper investigates how wall roughness affects radio propagation in tunnels, and presents a unified ray tracing and modal method for modeling radio propagation in tunnels with rough walls. First, general analytical formulas for modeling the influence of the wall roughness are derived, based on the modal method and the ray tracing method, respectively. Second, the equivalence of the ray tracing and modal methods in the presence of wall roughnesses is mathematically proved, by showing that the ray tracing-based analytical formula can converge to the modal-based formula through the Poisson summation formula. The derivation and findings are verified by simulation results based on ray tracing and modal methods.
First page of Ray Tracing and Modal Methods for Modeling Radio Propagation in Tunnels With Rough WallsPeer Reviewed Journal Article - May 2017
Go to Web Page
NIOSHTIC2 Number: 20049833
IEEE Trans Antennas Propag 2017 May; 65(5):2624-2634
See Also
CFD Modeling of Fire Spread Along Combustibles in a Mine Entry
Evaluation of the Relative Importance of Coalbed Reservoir Parameters for Prediction of Methane Inflow Rates During Mining of Longwall Development Entries
Experimental and Modeling Investigation of the Effect of Ventilation on Smoke Rollback in a Mine Entry
Measurement of the Influence of Antennas on Radio Signal Propagation in Underground Mines and Tunnels
Modeling and Data Analysis of 50 to 5000 kHz Radio Wave Propagation in Coal Mines
Propagation of UHF Radio Waves in Limestone Room and Pillar Mines
Radio 101: Operating Two-Way Radios Every Day and in Emergencies
Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
Theory on the Propagation of UHF Radio Waves in Coal Mine Tunnels
Variation of Horizontal Stresses and Strains in Mines in Bedded Deposits in the Eastern and Midwestern United States
Page last reviewed: May 1, 2018
Page last updated: May 1, 2018
Content source: National Institute for Occupational Safety and Health, Mining Program
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