Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2004.03b
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- Pages.391-398
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- 2004
Probabilistic Estimation of Fully Coupled Blasting Pressure
밀장전 발파압력의 확률론적 예측
- Park, Bong-Ki (Candidate, Korea Univ.) ;
- Lee, In-Mo (Dept. of Civil Eng., Korea Univ.) ;
- Kim, Dong-Hyun (SAMBO Engineering Co., LTD.) ;
- Lee, Sang-Don (Highway & Trans. Tech. Institute)
- Published : 2004.03.25
Abstract
The propagation mechanism of a detonation pressure with fully coupled charge is clarified and the blasting pressure propagated in rock mass is derived from the application of shock wave theory. Probabilistic distribution is obtained by using explosion tests on emulsion and rock property tests on granite in Seoul and then the probabilistic distribution of the blasting pressure is derived from their properties. The probabilistic distributions of explosive properties and rock properties show a normal distribution so that the blasting pressure propagated in rock can be also regarded as a normal distribution. Parametric analysis was performed to pinpoint the most influential parameter that affects the blasting pressure and it was found that the detonation velocity is the most sensitive parameter. Moreover, uncertainty analysis was performed to figure out the effect of each parameter uncertainty on the uncertainty of blasting pressure. Its result showed that uncertainty of natural rock properties constitutes the main portion of blasting pressure uncertainty rather than that of explosive properties.