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Mine Grounding Systems. Evaluation of In-mine Grounding System and Codification of Ground Bed Construction and Measurement Techniques.

Authors
Cooley-WL; McConnell-RL
Source
NTIS#: PB/81-178881 :300 pages
Link
NIOSHTIC No.
10006669
Abstract
The report describes two major grounding topics: mine ground systems and ground-check monitors. Performance characteristics of ground-check monitors for high-voltage surface mine distribution cables and low-voltage underground mine trailing cables are evaluated. Over 20 commercially available monitors are studied to determine their utility. Several monitoring concepts are incorporated into an unusual monitor design; the prototype is described in detail. A comparative study of the effectiveness of several alternate methods of grounding surface mine equipment supports the system currently proposed by MSHA. An instrument design to measure earth voltage gradients is described, as well as an instrument design for measuring the effectiveness of DC haulage current return systems. An extreme analysis is made of techniques for measuring earth resistivity and resistance of safety ground beds. Electrolytic corrosion studies of earth electrodes are reported extensively also.
Publication Date
19790101
Document Type
CP; Final Contract Report;
Fiscal Year
1979
NTIS Accession No.
PB81-178881
NTIS Price
A14
Identifying No.
OFR 23-81
NIOSH Division
PRC;
Source Name
NTIS#: PB/81-178881
State
WV;
Performing Organization
West Virginia University
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