Mining Publication: Research on the Transmission of Electromagnetic Signals Between Mine Workings and the Surface
Original creation date: January 1974
Authors: RG Geyer, GV Keller, T Ohya
NIOSHTIC2 Number: 10001486
Colorado School of Mines. U.S. Bureau of Mines Contract No. H0101691: NTIS No. PB-237852, 1974 Jan; :1-124
Field studies (Contract No. H0101691) of ambient electromagnetic noise and electrical transmission properties of coal mine overburdens in Colorado, Illinois, Pennsylvania, and West Virginia were conducted. Field tests of the transmission of low-frequency (20 hz to 20,000 hz) signals by vertical axis loops and horizontal wire antenna were made and compared with theoretical predictions. Implications of the field tests for the design of an electromagnetic system to locate trapped miners are discussed.
NIOSHTIC2 Number: 10001486
Colorado School of Mines. U.S. Bureau of Mines Contract No. H0101691: NTIS No. PB-237852, 1974 Jan; :1-124
- Composition Change Model for Sealed Atmosphere in Coal Mines
- Evaluating Performance Characteristics of Machine-Mounted Methane Monitors by Measuring Response Time
- Historical Development of Technologies for Controlling Methane in Underground Coal Mines
- Methane Control for Underground Coal Mines
- NIOSH Research for Monitoring and Controlling Methane at U.S. Underground Coal Mining Operations
- Peak Methane Concentrations During Coal Mining: An Analysis
- Refuge Alternatives in Underground Coal Mines
- Rotary Drilling Techniques Used in the Beckley Coalbed
- Use of a Test Box to Measure Response Times for Machine-Mounted Monitors
- Wireless Mesh Mine Communication System