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Rapid Excavation of Rock With Small Charges of High Explosives.
NTIS: PB/267-295 Available for Reference At Bureau Libraries :121 pages
The purpose of this investigation was to determine the feasibility of designing and testing the elements of a small-charge blasting system that will eliminate, or reduce to acceptable levels, most of the undesirable features of current underground drill and blast systems, that is, (1) air blasts, (2) ground vibrations, (3) flying fragments, (4) overbreak and fracture of rock, and (5) the cyclic nature of drill and blast operations. The experimentation was conducted in tunnels in granite, and the results indicated that the basic technical concepts of the project were achieved.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/267-295 Available for Reference At Bureau Libraries
University of Missouri-Rolla
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division