Triaxial seepage stress temperature creep coupling experimental device based on digital image

Abstract

The invention discloses a triaxial seepage stress temperature creep coupling experimental device based on a digital image. The triaxial seepage stress temperature creep coupling experimental device comprises a triaxial pressure chamber (1), a digital image observing system and a triaxial pressure chamber heating system, wherein a pore pressure applying system, a stable-pressure axial applying system and a surrounding pressure applying system are mounted on the triaxial pressure chamber (1); the pore pressure applying system comprises a pore pressure fluid injection tube (5), one end of the pore pressure fluid injection tube is connected with a first pressure pump (8); the first pressure pump (8) is used for providing pore pressure energy, the pressure value is measured by a digital pressure meter (9), and the pressure meter (9) is mounted on the pore pressure fluid injection tube (5). The triaxial seepage stress temperature creep coupling experimental device can be used for accurately and automatically measuring creep deformation by searching the influences of the surrounding pressure, the axial pressure, the hole pressure, the temperature and the creep deformation on coal permeability.

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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