An alternative method to evaluate mine ground system safety.
Cooley-WL; Hill-HW Jr.; Maberry-ML
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0338023, 1985 Jan; :1-138
A significantly different method of evaluating mine ground system safety was investigated. The method measures touch and step potentials around ground beds and grounded equipment resulting from a series of extremely small simulated faults. The values are then scaled for a full-scale fault. The method should be particularly useful for large ground beds and under conditions where the ground bed cannot be isolated from the rest of the ground system in order to make traditional ground bed resistance measurements. Instrumentation for making the alternative measurements was evaluated under rigorous field conditions. A step-by-step procedure is proposed for evaluating a surface mine ground system. This procedure was subject to several field tests at eastern metal mines and nonmetal mines. The final evaluation procedure is written as a stand-alone document for use by MSHA inspectors and mine operating personnel and is included as an appendix to the report.
Electrical grounding; Safety engineering; Evaluation; Accident prevention; Surface mining; Mine safety
CP; Final Contract Report
NTIS Accession No.
OFR 117-85; Contract-H0338023
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0338023
West Virginia University