Accession Number : ADA223108
Title : Laboratory Particle Velocity Experiments on Rock from a USSR Underground Nuclear Test Site
Descriptive Note : Technical rept.
Corporate Author : SRI INTERNATIONAL MENLO PARK CA
Personal Author(s) : Miller, S A ; Florence, A L
Report Date : Feb 1990
Pagination or Media Count : 51
Abstract : Particle velocity histories were measured in spherical wave experiments performed in Sierra White granite (1) to test a technique for increasing the useful signal duration for experiments in small diameter cores obtained from the joint verification experiment (JVE) site, and (2) to determine the effects of the pore space condition on wave propagation and attenuation. The technique used to increase the useful signal duration involved inserting a 6-cm diameter core into a borehole drilled in a 16-cm diameter specimen of the same material. Records from experiments with and without the core/borehole interface showed no effect of this interface. This technique can be used on the 6-cm diameter JVE cores. Three experiments were performed to compare different initial pore conditions: (1) dry, (2) saturated with equal overburden and pore pressures, and (3) saturated with 11.7 MPa effective stress. Results showed that any effects of initial pore condition are within experimental scatter. Therefore, an initial effective stress is not needed for future experiments, and they will be performed saturated with equal overburden and pore pressures. These preliminary experiments were performed in preparation for the testing program to be completed in the next year, during which time we will perform experiments on rocks from the JVE site and in samples obtained from a potential analog site in Maine.
Descriptors : *NUCLEAR EXPLOSION TESTING , *ROCK MECHANICS , DIAMETERS , LABORATORY TESTS , CORES , INTERFACES , SITES , UNDERGROUND EXPLOSIONS , GRANITE , ROCK , POROSITY , BOREHOLES , SATURATION , TIME , PARTICLES , WAVE PROPAGATION , SIGNALS , ATTENUATION , DRY MATERIALS , PORE PRESSURE , TEST FACILITIES , ANALOG SYSTEMS , SPHERICAL WAVES , MAINE , VELOCITY , USSR
Subject Categories : Geology, Geochemistry and Mineralogy
Distribution Statement : APPROVED FOR PUBLIC RELEASE