Mining Publication: Interaction of Radio Transmissions on Mine Monitoring and Control Systems
Original creation date: September 1986
Authors: LG Stolarczyk
NIOSHTIC2 Number: 10005557
A.R.F. Products, Inc. U.S. Department of the Interior, Bureau of Mines, Contract No. J0123038. NTIS No. PB/87-155032, 1985; :1-65
This report describes the creation of an efficient method to determine if command, control, communication, and monitoring (3cm) equipment in coal, metal, and nonmetal mines is susceptible to radio frequency interference (RFI) from the medium-frequency (MF) radio communications system. A qualitative and quantitative RFI test plan was developed for in-mine and laboratory evaluation of the equipment. The laboratory testing was accomplished using the transverse electromagnetic wave (TEM) test chamber. Detailed information on the test plan and the TEM test chamber is included. During in-mine testing of the MF system, some underground equipment malfunctioned when the transmitter's radiating antenna was in close proximity. Electromagnetic compatibility (EMC) testing was done on three levels: component (circuit or box), subsystems, and system. Nine tables are included that show the results of testing various equipment for RFI.

NIOSHTIC2 Number: 10005557
A.R.F. Products, Inc. U.S. Department of the Interior, Bureau of Mines, Contract No. J0123038. NTIS No. PB/87-155032, 1985; :1-65
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- A Medium Frequency Wireless Communication System For Underground Mines
- Medium-Frequency Propagation in Coal Mines
- Propagation of EM Signals in Underground Metal/Non-Metal Mines
- Propagation of EM Signals in Underground Mines
- Radio System Modifications for Improved Mine Safety (Medium Frequency)
- Theory on the Propagation of UHF Radio Waves in Coal Mine Tunnels
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- Wireless Communications for Trackless Haulage Vehicles