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Safe distances for blasting wiring from commonly encountered underground electromagnetic energy sources.

Authors
Thompson-RH
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. J0328023, :1-77
NIOSHTIC No.
20030897
Abstract
The use of electromagnetic field producing equipment in underground coal mining operations can only be expected to grow. The use of this equipment in underground mining operations is hampered by the possibility of their electromagnetic fields interacting with the electric blasting cap operations commonly carried out in the mines. Such interactions can have at least two results bearing directly on mine safety: premature initiation of the cap, either in its normal shot location or during hookup or transportation; and dudding of the cap so that normal firing operations do not cause initiation, thereby leaving unexploded high explosives after normal firing. The experimental work on this project was directed to determining the magnetic field distribution around typical underground current carrying conductor configurations.
Keywords
Mining-industry; Electromagnetic-energy; Electromagnetic-fields; Electromagnetic-interference; Electromagnetic-radiation; Statistical-analysis; Underground-mining; Radio-waves; Coal-mining
Publication Date
19830901
Document Type
Final Contract Report
Funding Type
Contract
Fiscal Year
1983
NTIS Accession No.
NTIS Price
Identifying No.
Contract-J0328023
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. J0328023
State
PA
Performing Organization
Franklin Research Center
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