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Mining Contract: Full-Wave Modeling of MF Propagation
Keywords: Coal mining Communication lines Communications, location tracking, and signalling Computer simulation Medium frequency communications systems
This page is archived for historical purposes and is no longer being maintained or updated.
Contract #
200-2010-36317Start Date
9/30/2010End Date
9/29/2013Research Concept
The contractor will develop models of MF propagation in mines based on results simulated through full-wave electromagnetic models. Full-wave simulations will be able to accurately model the coupling of antennas to mine conductors as well as model the propagation through coal mines. Simulations and models will be developed over a three-year effort.Topic Area
Emergency Communications and Tracking
Contract Status & Impact
This contract is complete. To receive a copy of the final report, send a request to mining@cdc.gov.
This contract investigates medium frequency (MF) propagation in coal mines. This work focused primarily on determining the changes in velocity factor and attenuation constant in medium frequency propagation on transmission lines in coal mines by varying the coal mine earth materials, the transmission line geometry (i.e., position of wire conductors relative to the coal mine tunnel boundaries), and changing the total number of wire conductors.
As a result of this contract, NIOSH OMSHR obtained dozens of FEKO models (electromagnetic simulation software) that are extremely useful and accurate for studying MF propagation in coal mines. The hybrid method developed during the course of this contract provides a means to exhaustively study and optimize MF communication networks in coal mines for survivability. The models have provided invaluable insight into the parameters that influence the performance of MF radio signal propagation on mine conductors (transmission lines). The results could be used by MF vendors to enhance the performance of their MF systems through optimizing the installation configuration of their conductors.



See Also
Antenna Design & Coupling Studies at Medium Frequency for lmproved Coal Mine Communications
Development and Application of Reservoir Models and Artificial Neural Networks for Optimizing Ventilation Air Requirements in Development Mining of Coal Seams
Medium-Frequency Propagation in Coal Mines
MULSIM/NL Application and Practitioner's Manual
MULSIM/NL Theoretical and Programmer's Manual
Research and Development Contract for Coal Mine Communication System: Volume 3 - Theoretical Data Base
SPONCOM - A Computer Program for the Prediction of the Spontaneous Combustion Potential of an Underground Coal Mine
Technology News 545 - NIOSH Updates Spontaneous Combustion Assessment Software
Technology News 546 - Medium Frequency Mine Emergency Communications - An Emerging Technology
Wireless Communications for Trackless Haulage Vehicles
Page last reviewed: July 19, 2016
Page last updated: July 19, 2016
Content source: National Institute for Occupational Safety and Health, Mining Program
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