Structure response and damage produced by airblast from surface mining.
Siskind DE; Stachura VJ; Stagg MS; Kopp JW
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 8485, 1980 Jan; :1-111
The Bureau of Mines studied airblast from surface mining to assess its damage and annoyance potential, and to determine safe levels and appropriate measurement techniques. Research results obtained from direct measurements of airblast-produced structure responses, damage, and analysis of instrument characteristics were combined with studies of sonic booms and human response to transient overpressures. Safe levels of airblast were found to be 134 dbl (0.1 Hz), 133 dbl (2 hz), 129 dbl (6 hz), and 105 dbl c-slow. These four airblast levels and measurement methods are equivalent in terms of structure response, and any one could be used as a safe-level criterion. Of the four methods, only the 0.1-Hz high-pass linear method accurately measures the total airblast energy present; however, the other three were found to adequately quantify the structure response and also represent techniques that are readily available to industry. Where a single airblast measuring system must be used, the 2-hz linear peak response is the best overall compromise.
Mining-industry; Explosive-hazards; Explosion-damage; Surface-mining; Monitors; Air-pressure
IH; Report of Investigations
NTIS Accession No.
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 8485