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Pilot Study for the Development of Precision Electronic Blasting Delay Detonators Utilizing Self-contained Integrated Timing Circuits.

Worsey P
For Reference Only At Bureau Libraries :67 pages
Apart from being inaccurate, electric blasting caps (detonators) are known to be inherently dangerous with respect to potential accidental initiation. This may be caused by different electric and electromagnetic phenomena such as static electricity, overhead powerlines, ground currents, radio waves, stray currents, and electric storms. However, apart from the risk of accidental initiation, commercial detonators are susceptible to misfire from grounding, short circuit, etc., due to the presence of moisture. Because of the latter two problems, certain manufacturers have begun to change production from electrically initiated detonators to encapsulated explosive tube initiated detonators. Although this new form of nonelectrical detonator has none of the quoted potential risks of accidental initiation or misfire, it contains the same type of chemical delay element that is the major cause of inaccuracy in electric delay series blasting caps. The purpose of this work is to combine the old and new technologies and develop a new integrated electronic delay blasting cap that utilizes an electronic microchip as a delay element.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
Identifying No.
OFR 35-83
NIOSH Division
Source Name
For Reference Only At Bureau Libraries
Performing Organization
University of Missouri-Rolla
Page last reviewed: November 12, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division