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AN IN SITU TECHNIQUE FOR ROCK THERMOPHYSICAL PROPERTY MEASUREMENT AND SITE CHARACTERIZATION.

Author(s) : DANKO G., MOUSSET-JONES P.

Summary

AN IN SITU MEASUREMENT METHOD CALLED REKA WAS DEVELOPED TO OBTAIN ROCK HEAT CONDUCTIVITY AND THERMAL DIFFUSIVITY. THE METHOD INVOLVES A SINGLE BORE-HOLE PROBE WITH A HEATER AND A TEMPERATURE MEASUREMENT SECTION. THE METHOD WAS TESTED IN A MINE, WHERE THE ROCK FORMATION WAS COMPLETELY DRY AND ONLY LIGHTLY STRESSED AND IN A POROUS AND PARTIALLY SATURATED SANDSTONE FORMATION AT AN URANIUMMINE. IT WAS OBSERVED THAT MOISTURE EVAPORATION SIGNIFICANTLY DISTURBED THE MEASUREMENT IF BOILING OCCURRED AT THE HEATER, BUT IT WAS POSSIBLE TO OBTAIN VALUES OF THE THERMOPHYSICAL PROPERTIES BY CONTROLLING THE HEATER TEMPERATURE BELOW THE MOISTURE BOILING POINT. THE IN SITU VALUES WERE 60% HIGHER THAN THE LABORATORY-MEASURED VALUES, DUE PRIMARILY TO THE EFFECT OF WATER CONTENT AND STRESS ON THE IN SITU ROCK MASS.

Details

  • Original title: AN IN SITU TECHNIQUE FOR ROCK THERMOPHYSICAL PROPERTY MEASUREMENT AND SITE CHARACTERIZATION.
  • Record ID : 1991-2300
  • Languages: English
  • Publication date: 1990/04/23
  • Source: Source: ASHRAE-FRIGAIR '90, Pretoria
    vol. 2; pap. M.6; 13 p.; 3 fig.; 1 tabl.; 11 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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