Effects of structural setting and rock peroperties on amplitudes of surface motions in the vicinity of small explosive tests
- Los Alamos National Lab., NM (United States)
- New Mexico Inst. of Mining and Technology, Socorro, NM (United States)
A series of small-scale explosive experiments were conducted in a perlite mine near Socorro, New Mexico. These experiments were a joint effort between Los Alamos National Laboratory, New Mexico Institute Of Mining and Technology, Southern Methodist University, and Defense Nuclear Agency. The purpose of these tests was to measure the changes in the shock wave and seismic coupling as a function of depth of burial and structural setting. The size of the explosive charges ranged from 1 to 68 kg. Over 1150 measurements of velocity and acceleration were made on thirteen experiments using three component sensors. The sensors were placed to maximize the azimuthal coverage as well as to provide data at a variety of ranges from {approximately}1 to 130 m. A few far field measurements were made at ranges of {approximately}2 km. While the bulk of the measurements were made on the surface, high g accelerometers were placed in one instrumentation borehole to provide some free-field measurements. Preliminary results indicate that significant differences in the amplitudes of signals can occur when the location of the explosive charges are changed by only meters. Part of the observed difference is attributed to variations in the rock immediately adjacent to the charge affecting the shock coupling; and part to the effects of the site characteristics.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10107270
- Report Number(s):
- LA-UR-93-4072; CONF-940144-1; ON: DE94003945
- Resource Relation:
- Conference: 20. annual Society of Explosives Engineers meeting on explosives and blasting techniques,Austin, TX (United States),30 Jan - 4 Feb 1994; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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