Numerical Simulation of Quarry Source and Reflection/Refraction Seismic Experiments
Final rept. Oct 1988-Sep 1989
WEIDLINGER ASSOCIATES LOS ALTOS CA
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This final reports presents results from numerical simulations of two recent field experiments, the 1987 San Vel Quarry source experiments in Littleton, Massachusetts, and the 1987 PACE reflectionrefraction experiment in Arizona. The purpose of this modeling exercise is to explore the use of large- scale simulation as an aid in interpreting such experiments andor planning similar source and reflectionrefraction studies in the future. The San Vel Quarry simulation is intended to provide insight into conventional quarry blast sources effects in terms of shot location and sequencing, as well as local topography and geology. The principal issue addressed is the practicality of using large scale 3-D simulations were done for a hypothetical single shot in the middle of the borehole array and the actual ripple-fired 72 shot event with deterministic sequencing. Comparisons with recorded accelerograms were made at the ten instrument sites.