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Evaluation and determination of sensitivity and electromagnetic interactions of commercial blasting caps.

Authors
Thompson-RH
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. H0210068, :1-210
NIOSHTIC No.
10010042
Abstract
Six different types of blasting caps, mainly of the type used in coal mines, were evaluated to determine both their radio frequency and direct current characteristics. Two of the caps were of foreign manufacture. All of the American made caps had "no-fire" (0.1 pct firing probability with 95 pct confidence, as determined by the Bruceton test) levels above 0.04 Watts. One of the caps of foreign manufacture had a "no-fire" level of 0.023 watts. A worst case analysis of blasting cap pickup of radio frequency power in coal mines was performed, and safe distance curves were generated.
Keywords
Mining-industry; Electromagnetic-energy; Electromagnetic-fields; Electromagnetic-interference; Electromagnetic-radiation; Statistical-analysis; Radio-waves
Publication Date
19730801
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1973
NTIS Accession No.
PB-236119
NTIS Price
A11
Identifying No.
OFR-49-74; Contract-H0210068
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. H0210068
State
PA
Performing Organization
The Franklin Institute Research Laboratories
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