True triaxial device and method for testing rock temperature and heat conductivity coefficient under stress variation

Abstract

The invention discloses a true triaxial device for testing rock temperature and a heat conductivity coefficient under stress variation. The device comprises a triaxial cell and a temperature heating system; the temperature heating system closely encircles an external side wall of the triaxial cell; the temperature application values of the temperature heating system range from 10 DEG C to 150 DEG C; a thermometer is arranged above a side wall of the triaxial cell; an upper end and a lower end of the triaxial cell are respectively provided with an upper seat and a pedestal; a test space is enclosed by the triaxial cell, the upper seat and the pedestal; an upper end of a side wall of the test space is provided with an exhaust passage and a temperature sensor passage which are communicated with the exterior from inside to outside; and a lower end of the test space is provided with an oil pipeline and a wire arranging passage. The true triaxial device disclosed by the invention has the advantages that the structure is simple, the use is convenient and the accuracy is high. The invention further discloses a method of the true triaxial device for testing the rock temperature and the heat conductivity coefficient under the stress variation.

Description

technical field [0001] The invention relates to the field of testing instruments, more specifically it is a true triaxial device for testing the thermal conductivity of rocks under changes in temperature and stress. The invention also relates to a method for testing a true triaxial device for testing thermal conductivity of rocks under varying temperatures and stresses. Background technique [0002] Thermal conductivity is an important thermal parameter of rocks, and it is used in underground nuclear waste disposal, CO 2 In projects such as storage, natural gas, and shale gas storage, it is often necessary to test the thermal conductivity of rocks. How to accurately measure the thermal conductivity of rocks is of great significance to the research of multi-field coupling in rock mass engineering; in diagenesis and long-term During the process of geological structure, the actual environment of the deep rock mass is extremely complex, subject to various external loads and tem...

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a true triaxial device for testing the thermal conductivity of rocks under varying temperature and stress conditions, capable of performing true triaxial test tests on thermal conductivity of rocks under varying conditions of temperature and stress, and to solve the problem of rocks in three-phase stress states It can more accurately reflect the conditions of rocks in the actual engineering environment

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