ABSTRACT:

The authors have proposed and discussed temporary storage of low temperature materials such as LNG, LPG and frozen food in openings excavated in rock mountains. In this case, as the rock mass around the openings will receive thermal hysteresis of low temperatures, it is necessary to obtain strength and deformation characteristics of rocks after receiving thermal hysteresis of low temperatures to consider the thermal behavior of rock mass around openings and the stability of openings. In this study, strength and deformation characteristics of some types of rocks were examined after receiving thermal hysteresis of low temperatures. Using the results of the experiments, temperature and stress distribution around openings were analyzed. From the results of analysis, it was found that in the case of receiving thermal hysteresis, crack length and freezing zone are about same as in the case of not receiving thermal hysteresis.

INTRODUCTION

The authors have proposed and discussed temporary storage of low temperature materials such as LNG, LPG and frozen food in openings excavated in rock mountains. This storage method has the advantages of efficient utilization of land, large scale storage, preservation of the environment, reduction of heat loss etc. In this case, the storage quantity of low temperature materials changes according to their use. For this, as the rock mass around the openings will receive thermal hysteresis of low temperatures, it is necessary to obtain strength and deformation characteristics of rocks after receiving thermal hysteresis of low temperatures to consider the thermal behavior of rock mass around openings and the stability of openings. In this study, strength and deformation characteristics of some types of rocks were examined after receiving thermal hysteresis of low temperatures. The effects of the amount of thermal hysteresis, atmospheric temperature, porosity, etc. on strength and deformation characteristics of rocks were discussed.

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