Geophysical methods in terrestrial material property determinations
By: Emmanuel E. Bliamptis, Ker C. Thomson
Contributors: Thomson, Ker C.
Series: Air Force surveys in geophysics -- no. 315
Publisher: Air Force Cambridge Research Laboratories, Air Force Systems Command, USAF
Published: 1975
Place of publication: Hanscom AFB, Mass
Language: eng
Number of pages: 57
Subjects: Rock mechanics; Soil mechanics; Rocks; Magnetic properties
Description: In-house and contractual research was conducted on the relationships between mechanical (strength) properties of rock and soil material and their electrical properties. A theoretical study involved the quantum electromagnetic and elastic interactions of crystals and solids. Laboratory and field investigations were made of the porosity and surface crack networks of large masses of quarry rocks, which govern their conductivity and permittivity. Thermal and mechanical stressing of rocks were analyzed. Electrical parameters of deep mine rocks were measured in-situ with emphasis on frequency/conductivity relationships. Direct mapping of rock strength as a function of electrical resistivity was investigated in the field. A three-dimensional modeling program was conducted in the laboratory. Field measurements of dynamic electrical conductivity of various earth materials were made under conditions of a rapid stress generated by high explosive setonations. Correlations demonstrated by this geophysical and geological research can be useful in prediction or evaluation of nuclear weapon shock effects on military installations.
Notes: "AFCRL-TR-75-0393."

"Terrestrial Science Laboratory, project 7639, CDNA."

Sponsored by the Defense Nuclear Agency under Subtask Y99QAXSB101 entitled "Site characterization."

"23 July 1975."

Bibliography: p. 37-38.