High-temperature and high-pressure true triaxial direct shear fracture seepage coupling testing device and use method thereof

Abstract

The invention relates to a high-temperature and high-pressure true triaxial direct shear fracture seepage coupling testing device. Two first pressure heads and two pressure assemblies are arranged above and below a rock sample in a manner of being symmetrical about the center of the rock sample. The two second pressure heads are arranged on the left and right sides of the rock sample in a central symmetry manner relative to the rock sample. The first pressing head comprises a first pressing head body provided with a groove part. A part of the pressure assembly is accommodated in the groove part. The pressure assembly comprises a rubber capsule and a base plate, and the rubber capsule applies pressure to the rock sample through the base plate. Seepage media in a first seepage network groove formed in the first pressure head main body and a second seepage network groove formed in the base plate apply seepage pressure to the rock sample. The triaxial testing machine applies lateral confining pressure, axial pressure and high temperature to the rock sample. The true triaxial direct shear fracture seepage testing device has the beneficial effects that the true triaxial direct shear fracture seepage testing device is combined with a triaxial testing machine, a true triaxial direct shear fracture seepage test can be carried out on a rock sample under high-temperature and high-pressure conditions, and the practicability and the reliability are relatively high.

Description

technical field [0001] The invention relates to the technical field of rock experiments, in particular to a high-temperature, high-pressure true triaxial direct shear fracture seepage coupling test device and a use method. Background technique [0002] Resource extraction and energy development in geotechnical engineering include nuclear waste treatment, carbon dioxide sequestration, deep well injection, geothermal energy production, and oil and gas production. With the continuous utilization of resources in shallow geotechnical engineering, the mining depth of geotechnical engineering has continued to increase. The basic occurrence environment of deep geotechnical engineering is a high-temperature, three-dimensional, high-stress, and high-fluid-pressure environment. In order to better improve the safety of deep geotechnical engineering mining and development, avoid fluid medium injection into rock fractures to induce earthquakes and CO 2 Casualties and construction delays ...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a high-temperature and high-pressure true triaxial direct shear fracture seepage coupling test device and its use method, which solves the problem that high temperature and high osmotic pressure cannot be provided for the true triaxial direct shear fracture test of rocks. Environmental conditions, unable to meet the technical problems of direct shear fracture seepage coupling test in the multiple coupling environment of high temperature-high osmotic pressure-high lateral confining pressure on rock samples at the same time

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