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Mining Publication: Propagation of UHF Radio Waves in Limestone Room and Pillar Mines
Keywords: Coal mining Limestone Numerical modeling Radios Room and pillar mining 
 Tunnels
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: January 1979
Authors: RL Lagace, AG Emslie
Contract/MOA Report - January 1979
Download PDF Document (1.04 MB)
NIOSHTIC2 Number: 10002336
Arthur D. Little, Inc. U.S. Bureau of Mines Contract No. J0377065. NTIS No. PB/82-190547, 1979; :1-43
This report presents a mathematical model for the propagation of UHF radio waves in the large cross section tunnels of a room-and-pillar limestone mine and describes the analysis of a small amount of propagation data obtained. The model and analysis is based on the waveguide mode theory, developed earlier for the transmission of UHF waves in coal mine tunnels, with allowance for propagation losses due to refraction into the tunnel walls. Propagation around corners and through pillars is also examined based on a ray theory approach together with the beneficial effects of placing reflectors at intersections to significantly reduce corner losses. The theory is found to be in fair agreement with the data; however, additional in-mine measurements are needed to provide a more conclusive test of the model.
Image of publication Propagation of UHF Radio Waves in Limestone Room and Pillar MinesContract/MOA Report - January 1979
Download PDF Document (1.04 MB)
NIOSHTIC2 Number: 10002336
Arthur D. Little, Inc. U.S. Bureau of Mines Contract No. J0377065. NTIS No. PB/82-190547, 1979; :1-43
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Numerical Modeling Procedures for Practical Coal Mine Design
Pillar Stability Issues Based on a Survey of Pillar Performance in Underground Limestone Mines
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Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
Straight Line Walking and Path-Turn Identifying Algorithms for a Tracking Device Used in Underground Mines
Support Design Procedures for Difficult Ground Conditions
Theory on the Propagation of UHF Radio Waves in Coal Mine Tunnels
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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