Laboratory particle-velocity experiments on Indiana limestone and Sierra white granite. Final report, 5 Oct 90-Jan 92

Technical Report · Tue Oct 01 04:00:00 EDT 1991

OSTI ID:5327865

Miller, S A; Florence, A L

Laboratory experiments were performed to determine the influence of freezing on the spherical wave generated by a small spherical explosive charge in rock. The work is relevant to the Soviet nuclear test site in Novaya Zemlya where permafrost conditions exist. The results are also valuable for developing and validating material modeling in continuum mechanics codes used for source coupling calculations. The experiments were performed with cores of well characterized Indiana limestone (porosity 16%) under frozen/dry and frozen/saturated conditions and well characterized Sierra White granite (porosity 0.8%) in a frozen/saturated condition. The spherical waves were determined by particle velocity measurements at several ranges. The effect of freezing was evaluated by comparing these results from our past room temperature experiments with the same rock type. From the particle velocities, we obtained displacements, reduced velocity and displacement potentials, spectra of these quantities, and radiated kinetic energy. The main conclusions are that freezing the dry limestone and saturated granite had no effect on the spherical waves. However, freezing of the saturated limestone had a substantial effect on the spherical waves. These effects included an increase of wave speed and reductions of maximum outward velocity, inward and outward phase durations, and displacements.

• Research Organization: SRI International, Menlo Park, CA (United States)
• OSTI ID: 5327865
• Report Number(s): AD-A-248045/7/XAB; CNN: F19628-91-K-0003
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450200* -- Military Technology
Weaponry
& National Defense-- Nuclear Explosions & Explosives
450300 -- Military Technology
Weaponry
& National Defense-- Nuclear Explosion Detection
ASIA
CARBONATE ROCKS
DEVELOPED COUNTRIES
ENERGY
EUROPE
EXPLOSIONS
FREEZING
GRANITES
IGNEOUS ROCKS
INDIANA
KINETIC ENERGY
LIMESTONE
NORTH AMERICA
NUCLEAR EXPLOSIONS
PERMAFROST
PLUTONIC ROCKS
POROSITY
ROCKS
SEDIMENTARY ROCKS
SEISMIC EFFECTS
SEISMIC WAVES
TEST FACILITIES
TESTING
USA
USSR
VELOCITY
WAVE PROPAGATION