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Rapid Excavation of Rock With Small Charges of High Explosives.

Authors
Clark-GB; Rollins-RR
Source
NTIS: PB/267-295 Available for Reference At Bureau Libraries :121 pages
Link
NIOSHTIC No.
10001511
Abstract
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.
Publication Date
19760101
Document Type
CP; Final Contract Report;
Fiscal Year
1976
NTIS Accession No.
PB-267295
NTIS Price
A07
Identifying No.
OFR 98-77
NIOSH Division
TCRC;
Source Name
NTIS: PB/267-295 Available for Reference At Bureau Libraries
State
MO;
Performing Organization
University of Missouri-Rolla
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