The waterborne pressure wave from buried explosive charges: An experimental ivnestigation
✍ Scribed by J.R. Nedwell; T.S. Thandavamoorthy
- Book ID
- 102988156
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 603 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0003-682X
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✦ Synopsis
Underwater borehole blasting, in which charges of explosive are used to fragment bedrock prior to dredging, is common in marine civil engineering. Damage may be caused to nearby structures as a result of blast-induced pressure waves in the water. While much information is available concerning the pressure wave from explosive charges detonated in free water, little is known about embedded charges and hence the estimation of safe charge sizes is difficult.
The pressure time histories and their spectra arising from the detonation of small explosive charges is measured for the free water and embedded cases, and a transfer.function or "correctionfactor'presentedexpressing the difference in spectral level of the tn'o cases. The difference in level is shown to be the least at Ion' frequencies. The results may be used to apply standard formulae for the pressure from free water charges to those for embedded charges, and hence to calculate safe charge si:es.