Accession Number:

ADA422856

Title:

Analysis and Simulation of Cavity-Decoupled Chemical Explosions

Descriptive Note:

Scientific rept. 2, 1 Oct 2002-30 Sep 2003

Corporate Author:

SCIENCE APPLICATIONS INTERNATIONAL CORPSAN DIEGO CA

Report Date:

2003-10-24

Pagination or Media Count:

48.0

Abstract:

We analyze data from two sets of decoupled chemical explosions. NORSAR has obtained data from seven decoupled chemical explosions conducted from 1987-2002 in Alvdalen, Sweden, recorded both in he near field and on regional seismic stations NORES, HAGFORS, and NORSAR. The explosions were conducted in three granite chambers at a depth of approximately 100 meters in chambers with volumes of 200, 300 and 1000 m and yields ranging from 2500 kg to 10,000 kg. The smallest explosion in the largest chamber is almost fully decoupled while the other explosions are partially coupled, overdriven by up to a factor of 25. The data show that decoupling remains fairly constant for overdrive up to about a factor of 10, then decreases rapidly at higher yields. 1D and 3D simulations of these explosions are performed to model the data. IDG has digitized a set of surface seismic data recorded from a series of Soviet high-explosive cavity decoupling tests conducted in a mine in Kirghizia in the summer of 1960.

Subject Categories:

  • Seismology
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE