Rock biaxial compression micromechanics testing device under stress-water current-chemical coupling actions

Abstract

The invention relates to a rock micromechanics testing device and in particular relates to a rock biaxial compression micromechanics testing device under stress-water current-chemical coupling actions, belonging to instruments and equipment. A lateral loading shaft is additionally arranged in the testing device, so that the loading mode of uniaxial compression in the existing testing device is improved. A vertical partition plate is additionally arranged in a box body and divides the box body into two independent parts, wherein one part serves as a test chamber for testing, and the other part serves as a working chamber for lateral loading. A water inlet and a water outlet are matched with the test chamber and can control a stable water current to be formed in the test chamber. The height of the box body can be adjusted by additionally arranging horizontal adjusting bolts to ensure that the box body is always in a horizontal state. The device can achieve biaxial compression loading on rock samples and control the flow velocity of chemical solutions so as to achieve biaxial compression tests on rocks under the condition of actions of different chemical solutions, is reasonable in design, is convenient to operate and use, and is suitable for biaxial compression tests of various rocks under stress-water current-chemical coupling actions.

Description

technical field [0001] The invention relates to a rock mesoscopic test device, in particular to a biaxial mesoscopic compression test of a rectangular rock mass, in particular to a rock biaxial compression mesoscopic test device under stress-water flow-chemical coupling, which belongs to the category of instruments and equipment. Background technique [0002] The research on the failure behavior of fractured rocks under the coupling conditions of stress-water flow-chemistry is one of the most advanced topics in the field of rock mechanics in the world. It is one of the most basic research topics of many rock engineering, such as caves, chambers, etc., and has very important scientific significance. Among the many influencing factors of rock engineering safety, water is the most active one. After the rock and soil are eroded by the water chemical solution, the physical and mechanical properties of the rock and soil are changed due to the water-rock interaction that weakens t...

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Problems solved by technology

Scholars at home and abroad have also carried out in-depth research work on stress-water flow-chemical coupling. Previous research results also involve the mechanism and analysis methods of rock fracture failure under complex stress, water pressure and chemical coupling, but they are not comprehensive.

Chinese Patent Publication No. CN1603784A, published on April 6, 2005, the title of the invention is (Mesomechanical Experimental Device for Uniaxial Compression of Rock with Stress-Water-Chemical Coupling), and the technical solution of this application only involves rock under uniaxial compression It is difficult to explain the failure mechanism of fractured rock mass under complex ground stress and solution corrosion environment.

Chinese Patent Publication No. CN1619294A, published on May 25, 2005, the name of the invention is (Mesomechanical loading system for the whole process of rock fracture under stress-water flow-chemical coupling), the mesomechanical loading system can realize uniaxial Experiments on the rock fracture process, but have not yet fully resolved the mechanism of rock fracture initiation, expansion, penetration and interaction damage evolution process and rock fracture law under the coupled action of complex stress, fluid action and chemical corrosion

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