Triaxial Seepage Stress-Temperature-Creep Coupling Experimental Device Based on Digital Image

Abstract

The invention discloses a digital image-based triaxial seepage stress temperature creep coupling experiment device, which comprises a triaxial pressure chamber (1), a digital image observation system and a triaxial pressure chamber heating system, the triaxial pressure chamber (1) A pore pressure application system, an axial pressure application system with stabilizing pressure and a confining pressure application system are installed on it; the pore pressure application system includes a pore pressure fluid injection pipe (5), and the pore pressure fluid injection pipe (5 ) is connected to the first pressure pump (8), the pore pressure energy is provided by the first pressure pump (8), and the pressure value is measured by a digital pressure gauge (9), and the pressure gauge (9) is installed in the pore pressure fluid Injection tube (5). The invention can use the device to study the influence of confining pressure, axial pressure, pore pressure, temperature and creep deformation on coal permeability; it can accurately and automatically measure creep deformation and reduce manpower consumption.

Description

technical field [0001] The invention relates to the field of rock mechanics, in particular to a digital image-based triaxial seepage stress temperature creep coupling experimental device. Background technique [0002] Coal and rock are natural geological bodies that have been subjected to in-situ stress for a long time. After manual excavation disturbance, the ground stress and temperature change, and usually suffer from long-term ground stress, which has a great impact on the permeability of coal and rock mass. To study the influence of stress, temperature and long-term stress on the permeability of coal rock Law is the key to rock engineering stability analysis, coal seam gas drainage and disaster prevention and other projects; [0003] Existing coal and rock triaxial seepage test devices can generally study the influence of stress on coal and rock permeability. The actual coal and rock media have complex occurrence and working conditions, not only subjected to excavation...

AI Technical Summary

Problems solved by technology

In addition, coal and rock media are usually brittle materials, and the creep deformation is small. It is difficult to measure accurately by conventional methods (such as dial indicators), and the testing process is complicated. New methods need to be introduced for observation.

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