The authors have proposed and discussed storage of low temperature materials such as LNG, LPG and frozen food in rock caverns. In this case, as the rock mass around the caverns will receive effects of low temperature, it is necessary to consider the thermal behavior and the stability of caverns. In this study, strength and deformation characteristics obtained by the uniaxial tension test and the compression test at low temperatures were discussed. Using the results, temperature and stress distribution around caverns when LNG was stored, were analyzed. Then thermal behavior of the rock mass around caverns was discussed.

Die Autoren haben Lagerung von Niedertemperatur-Materialien wie LNG, LPG und tiefgefrorenen Nahrungsmitteln in Felskavernen vorgeschlagen und diskutiert. Da in diesem Fall die Felsmasse um die Kavernen den Effekten der niedrigen Temperatur ausgesetzt ist, ist es erforderlich, das Thermalverhalten und die Stabilitat der Kavernen zu beruecksichtigen. In dieser Untersuchung wurden Starke-und Deformationseigenschaften, die durch ein-axialen Spannungstest und Kompressionstest bei niedrigen Temperaturen erhalten wurden, diskutiert. Mit diesen Ergebnissen wurden Temperatur- und Stressverteilung um die Kavernen bei Lagerung von LNG analysiert. Dann wurde das Thermalverhalten der Felsmasse in der Umgebung der Kavernen diskutiert.

Les auteurs proposent et discutent l'entreposage de materiaux à basse temperature, tels que le GNL, le GPL et des aliments congeles, dans des cavites rocheuses. Comme, dans ce cas, la masse rocheuse entourant la cavite subit les effets des basses temperatures, il est necesaire d'etudier le comportement thermique et la stabilite des cavites. Dans cette etude, les auteurs discutent des caracteristiques de resistance et de deformation, obtenues par essai de tension uniaxial et essai de compression à basse temperature. En se servant des resultats, ils analysent la repartition de la temperature et des pressions autour des cavites, lors du stockage de GNL. Ils discutent ensuite le comportement thermique de la masse rocheuse autour des cavites.

Introduction

The storage of low temperature materials in rock caverns excavated in mountains is proposed and discussed. The low temperature materials are LNG (-162oC), LPG (-43oC) and frozen food (-60oC). This method has many advantages, such as efficient utilization of land, energy conservation, large-scale storage, preservation of the environment, etc. In this case, as the rock mass around the caverns will receive effects of low temperatures, it is necessary to consider the thermal behavior and the stability of caverns.

In this study, strength and deformation characteristics of rocks were examined at low temperatures. That is, results by the uniaxial tension test and the compression test were compared and discussed. It is supposed that low temperature materials were stored in caverns. Using the results of the tests mentioned above, temperature and stress distribution around caverns were analyzed. Then the thermal behavior of the rock mass around caverns was discussed.

Uniaxial tension test at low temperatures
Rocks used for the test

The rocks used for the tests were granite, andesite and sandstone. In the case of granite, then specimens for the uniaxial tension test.

This content is only available via PDF.
You can access this article if you purchase or spend a download.