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in creator/contributor: "Paulsson, B.N.P."  
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Seismic velocities and attenuation in an underground granitic waste repository subjected to heating

Description: The behavior of a granitic rock mass subjected to thermal load has been studied by an acoustic cross-hole technique between four boreholes, over a period of some two years. Velocities between boreholes were obtained from the times-of-flight of pulses of acoustic waves between transducers clamped to the borehole wall. The attenuation was obtained by a spectral ratios technique. When the heater was turned on, the velocities increased rapidly to an asymptotic value. When the heater was turned off,… more
Date: March 1, 1984
Creator: Paulsson, B.N.P. & King, M.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cross-hole investigation of a rock mass subjected to heating

Description: A cross-hole high-frequency acoustic investigation of a granitic rock mass subjected to sustained heating is reported. Compressional and shear-wave velocity measurements along four different paths between four vertical boreholes made prior to turning on the heater, during 398 days of heating and after the heater was turned off correlated well with the presence of fracture zones, in which the fractures were closed by thermal expansion of the rock upon heating. When the rock mass cooled, the velo… more
Date: April 1, 1980
Creator: Paulsson, B.N.P. & King, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Between-hole acoustic surveying and monitoring of a granitic rock mass

Description: The purpose of this technical note is to present preliminary results of an acoustic monitoring study performed as part of a comprehensive rock mechanic and geophysics research program (Ref.20) associated with large-scale heater tests in an abandoned iron-ore mine in central Sweden. The investigation was performed in a fractured granitic rock mass at a sub-surface depth of 340 m, in a drift adjacent to the original iron-ore mine workings. Acoustic monitoring took place between four empty, dry, v… more
Date: February 1, 1980
Creator: Paulsson, B.N.P. & King, M.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ultrasonic and acoustic emission results from the Stripa heater experiments. Part I. Cross-hole investigation of a rock mass subjected to heating. Part II. Acoustic emission monitoring during cool-down of the Stripa heater experiment

Description: A cross-hole high-frequency acoustic investigation of a granitic rock mass subjected to sustained heating is reported. Compressional and shear-wave velocity measurements along four different paths between four vertical boreholes were made prior to turning on the heater, during 398 days of heating, and after the heater was turned off. These measurements correlated well with the presence of fracture zones, in which the fractures were closed by thermal expansion of the rock upon heating. When the … more
Date: December 1, 1980
Creator: Paulsson, B.N.P.; King, M.S. & Rachiele, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rapid acquisition of high resolution full wave-field borehole seismic data

Description: An essential requirement for both Vertical Seismic Profiling (VSP) and Cross-Hole Seismic Profiling (CHSP) is the rapid acquisition of high resolution borehole seismic data. Additionally, full wave-field recording using three-component receivers enables the use of both transmitted and reflected elastic wave events in the resulting seismic images of the subsurface. To this end, an advanced three- component multi-station borehole seismic receiver system has been designed and developed by Sandia N… more
Date: April 1, 1993
Creator: Sleefe, G. E.; Harding, R. S. Jr.; Fairborn, J. W. & Paulsson, B. N. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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