Accession Number : ADA265517


Title :   Numerical Simulation of Quarry Blast Sources


Descriptive Note : Technical rept. 18 Sep 1991-1 Nov 1992


Corporate Author : S-CUBED LA JOLLA CA


Personal Author(s) : Barker, T G ; McLaughlin, K L ; Stevens, J L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265517.pdf


Report Date : Jan 1993


Pagination or Media Count : 66


Abstract : Quarry blast sources are developed based on well-documented blasting practices from decades of blasting in quarries and used to simulate seismic signals from quarry blasts, and to examine the 'hide-in-quarry blast' scenario for evading detection of nuclear weapons testing. Blasting is designed to break rock through spallation, and the resultant spall is an important part of the quarry blast source. The quarry blast source models include the finite size of the source, the effect of ripple firing (time delays and spatial separation), the effect of net vertical and horizontal rock movement, and the relative excitation of the explosion and spall sources. We simulate the 'hide-in-quarry blast' scenario as an overburied nuclear explosion beneath the quarry blast. We find that for a one kiloton quarry blast source: The quarry blast source is band-limited compared to the buried explosion, and decays rapidly over the 0.5- 3, Hz frequency band.


Descriptors :   *NUCLEAR EXPLOSIONS , *SEISMIC DETECTION , WEAPONS , NUCLEAR WEAPONS , ROCK , FREQUENCY BANDS , DELAY , DISCRIMINATION , SPALLATION , NETS , RIPPLES , SIGNALS , TIME , EXPLOSIONS , EXCITATION , SCENARIOS


Subject Categories : Chemical, Biological and Radiological Warfare


Distribution Statement : APPROVED FOR PUBLIC RELEASE