Results 1 - 4 of 4
Simulation and Measurement of Through-the-Earth, Extremely Low-Frequency Signals Using Copper-Clad Steel Ground Rods9/1/2017 - Peer reviewed journal articlesA paper presenting the simulation and measurement results of recent NIOSH research aimed at investigating current injection at extremely low-frequency, and in particular, ground contact impedance.
Earth Conductivity Estimation from Through-the-Earth Measurements of 94 Coal Mines Using Different Electromagnetic Models10/1/2014 - Peer reviewed journal articlesAn analyis of TTE measurement data collected from 94 mines in order to determine the apparent conductivity of the overburden based on three different models: a homogenous half-space model, a thin sheet model, and an attenuation factor or Q-factor model.
9/1/2012 - Peer reviewed journal articlesNational Institute for Occupational Safety and Health research aimed at demonstrating the feasibility of through-the-earth (TTE) wireless communication in mining.
2/1/1984 - Peer reviewed journal articlesThe Bureau of Mines has conducted field studies in coal mines throughout the United States to determine the effectiveness of electromagnetic techniques in locating miners trapped underground following a mine accident.