Fully-rigid true triaxial system for rocks and deep rock temperature stress coupling simulation system

Abstract

The invention discloses a fully-rigid true triaxial system for rocks and a deep rock temperature stress coupling simulation system, relating to the field of geotechnical engineering. The fully-rigid true triaxial system comprises a rigid true triaxial system and a temperature control system, wherein the rigid true triaxial system comprises a first loading shaft, a second loading shaft and a thirdloading shaft which are vertical two by two; a driving system is connected to the first loading shaft, the second loading shaft and the third loading shaft respectively to drive the first loading shaft, the second loading shaft and the third loading shaft to respectively move along the extension directions so as to extrude test samples; and the temperature control system is fit to the test samplesand is used for heating the test samples. The deep rock temperature stress coupling simulation system adopts the fully-rigid true triaxial system for the rocks. According to the fully-rigid true triaxial system for the rocks and the deep rock temperature stress coupling simulation system, a stress path simulation experiment can be realized in a high temperature environment of 800 DEG C.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a rock full rigid true triaxial system and a deep rock mass temperature-stress coupling simulation system. Background technique [0002] True triaxial stress path simulation is one of the important experimental means to study rock mechanical properties, and stress path simulation experiments under high temperature conditions are of great significance to the study of rock mechanical properties under special engineering geological conditions in deep. With the exploitation of shale gas, deep geothermal resources and other resources in recent years, there is an urgent need for a device that can simulate different high geostress states at high temperatures, which poses a big challenge to the current experimental principles and experimental instruments. At present, most of the rock true triaxial experimental instruments used to simulate the stress state adopt a composite loading...

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Problems solved by technology

At present, most of the rock true triaxial experimental instruments used to simulate the stress state adopt a composite loading method, that is, a rigid plate is used for axial loading, and flexible plates are used for the other two sides and four sides, or rigid plates are used for two corresponding sides, and rigid plates are used for the other one. Flexible plates are used on both sides, which requires hydraulic oil to be injected into the pressure chamber to load the rock sample to achieve confining pressure, so it is impossible to simulate the high temperature underground environment above 200 °C

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