"The introduction of electric blasting caps have delay intervals of the order of one-half to one second proved of advantage in many aspects of underground mining, particularly development work. Their use spread, until they now supersede fuse-and-cap firing wherever possible. Split-second delay electric blasting caps are a comparatively recent development from conventional delay caps. They have been found of practicable use in quarrying operations, and have been applied in many phases of underground mining. While evidence, to show that short-delay firing in quarrying is more efficient than instantaneous firing, is becoming increasingly conclusive, it remains to be proved that split-second delays are more effective than conventional delays in underground operations. Being concerned with the lack of such evidence in favor of split-second delay caps, Mr. F. S. Elfred, Jr., General Manager, Western Cartridge Company, suggested that the testing of these caps be introduced into the research program of the Missouri School of Mines and Metallurgy. As one phase of this program, the author, under the guidance of Dr. J. D. Forrester, carried out a series of tests designed to compare the results of split-second and regular delay firing, at the Experiment Mine of the Missouri School of Mines and Metallurgy"--Preface, page iii.
Forrester, James Donald, 1906-1979
Mining and Nuclear Engineering
M.S. in Mining Engineering
Western Cartridge Company
Missouri School of Mines and Metallurgy
vii, 65 pages, map
© 1950 John B. H. Fitzwilliam, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Blast effect -- Testing
Electric detonators -- Testing
School of Mines and Metallurgy
University of Missouri
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Fitzwilliam, John B. H., "A study of the efficiency of split-second delay electric blasting caps in underground limestone mining" (1950). Masters Theses. 6804.