Accession Number : ADA300913

Title :   Seismic Hard In-Situ Source Test (SHIST) CRALE 1D and 2D Scoping Calculations.

Descriptive Note : Technical rept. 15 Sep 93-15 Mar 95,

Corporate Author : TITAN CORP CHATSWORTH CA

Personal Author(s) : Koik, Victor E. ; Rocco, Jim R. ; Thomsen, Jeffrey M.

PDF Url : ADA300913

Report Date : 01 OCT 1995

Pagination or Media Count : 132

Abstract : SHIST (Seismic Hard rock In-Situ Source Test) was a proposed prototype High Explosive (HE) seismic source function experiment designed to provide a benchmark data set for seismic source function models in hard rock geology and also to provide a threshold of detection calibration point for regional seismic monitoring systems. The experiment was to consist of 20 tons of HE in a fully contained sphere detonated in a granite test bed. The test was subsequently canceled. This report describes preliminary material models developed for the site and 1 D and 2D finite difference scoping calculations performed to serve as a starting point should the test (or other HE test requiring a hard rock geology) be revived in the future. The intent of this study was to investigate the details of the shock wave propagation into granite, and to determine the seismic transition point (the range at which the stress wave developed by the HE source began to decay as an elastic wave) to assist with gage placement activities. 3D effects, such as the surface slope variation and ground fault lines, found to exist at the proposed SHIST Site, were neglected.

Descriptors :   *UNDERGROUND EXPLOSIONS, *SEISMIC WAVES, DATA BASES, MONITORING, FINITE ELEMENT ANALYSIS, SHOCK WAVES, GRANITE, FAULTS(GEOLOGY), SURFACES, WAVE PROPAGATION, TRANSITIONS, CALIBRATION, HARDNESS, GAGES, SEISMOLOGY, HIGH EXPLOSIVES, STRESS WAVES, ELASTIC WAVES.

Subject Categories : Explosions
      Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE