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Mine Grounding Systems: Evaluation of In-mine Grounding System and Codification of Ground Bed Construction and Measurement Techniques.
NTIS: PB 286 120 Available for Reference At Bureau Libraries :267 pages
Several aspects of mine safety grounding systems and equipment are studied. Electrolytic corrosion of test ground beds has shown a high incidence of stray current damage, while efforts to build a reliable continuous ground bed monitor continue. Laboratory and field investigations of trailing cable splices have yielded strong evidence that splices can contribute to stray current problems in the mines, and a method is suggested for discovering deteriorating splices before they pose a serious hazard. A prototype device has been constructed to evaluate the electrical resistance of rail bonds underground as a source of stray current. Theoretical modeling of ground electrodes has advanced considerably, now covering measurements of large cylindrical electrodes, multiple-rod ground beds, rod electrodes in stratified earth, and measurement of connected beds. A prototype instrument design is given for a potential gradient plotter to quickly evaluate voltage gradients near earth electrodes.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 286 120 Available for Reference At Bureau Libraries
West Virginia University
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division