High-temperature high-stress true triaxial test device and method

Abstract

The invention relates to the technical field of rock mechanics and engineering, in particular to a high-temperature high-stress true triaxial test device and method. The high-temperature high-stress true triaxial test device comprises a heating box, a loading bin, a clamping device, a cooling assembly, a pressure head assembly, a hydraulic lifting rod, a first large main stress actuator, a secondlarge main stress actuator, a first middle main stress actuator and a second middle main stress actuator. According to the high-temperature high-stress true triaxial test device, a rock mechanical test of true triaxial test equipment under a high-temperature condition is realized; the heating box is arranged in the clamping device, the real condition of the rock test piece at high temperature canbe simulated, the rock test piece can be uniformly heated, the clamping device can move up and down relative to the loading bin, the test piece bearing through hole is formed in the horizontal direction so that the rock test piece can be conveniently placed into the heating box, the working temperature of the actuator can be reduced by arranging the cooling assembly, the loading precision is improved, and then the authenticity and accuracy of test data are improved.

Description

technical field [0001] The invention relates to the technical field of rock mechanics and engineering, in particular to a high-temperature and high-stress true triaxial test device and method. Background technique [0002] Due to the huge reserves of geothermal energy in the world, it has extremely high utilization value and development space. Among them, hot dry rock (HDR) has the largest energy reserves, accounting for about 90% of the total. The temperature of the rock mass located in the deep part of the surface generally increases with the increase of the burial depth. Under normal circumstances, the temperature will increase by 3-6°C for every 100m increase in the burial depth. The temperature of the rock formation below 2000m from the surface is usually higher. At 60°C, the temperature of the rock formation below 4000m from the surface will generally reach above 200°C, and the high-temperature rock formation with a temperature exceeding 150°C has a high development an...

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Problems solved by technology

[0003] Aiming at the problem that the rock mass in the geothermal energy development zone needs to withstand extremely high ground stress and temperature due to its large buried depth, general test equipment cannot make the rock specimens in a relatively real high-temperature and high-pressure test state, and thus cannot be used for geothermal energy development. Therefore, the development of relevant test equipment is of certain importance

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