Manufacturing and test method of rock compression shearing test specimen containing intermittent joints at high temperature

Abstract

The method for making and testing rock compressive shear samples with discontinuous joints at high temperature in the present invention includes: 1) making rock compressive shear samples with discontinuous joints; 2) using rock compressive shearing samples with discontinuous joints The sample is tested for shear strength: a) Use the rock high-temperature triaxial compression test equipment to directly load the sample, carry out the rock compression test with discontinuous joints, and measure the shear strength with discontinuous joints; b) Use the rock high temperature The triaxial compression test equipment conducts the joint shear test under high temperature and high pressure conditions in the temperature and pressure chamber and the acoustic emission AE and CT scanning research during the test process: C) The shear plane of the rock compression shear sample with continuous joints is 10℃~ Testing of shear strength indicators (cohesion and internal friction angle) at 200°C. The invention can carry out acoustic emission (AE) test during sample compression and CT scanning test in compression process, has the advantages of exploring the effect of temperature and pressure conditions on joint properties, and makes up for the deficiencies of traditional rock samples.

Description

technical field [0001] The invention relates to a model making method capable of carrying out compression tests and shear tests containing intermittent joints under high temperature and high pressure conditions, and a test method based on the sample. The rock sample can be subjected to compression tests under various temperature and pressure conditions provided by the temperature and pressure chamber, as well as the shear strength test of the fixed shear surface of the rock sample; intermittent joints can be made at the position of the shear surface for use in Investigate the influence of temperature and pressure conditions on joint properties. Background technique [0002] With the rapid development of national infrastructure and the deepening of the western development, some new rock mass engineering problems have emerged in engineering construction. The thermodynamic properties of rock mass in deep tunnels is one of the outstanding problems. This is the classical rock...

AI Technical Summary

Problems solved by technology

At present, due to the limitation of test instruments, it is difficult to carry out experiments to explore the influence of temperature on the properties of intermittent joints.

In the direct shear test and triaxial shear test of conventional rocks, the disadvantages lie in 1) the conventional direct shear test cannot conduct CT scanning and acoustic emission (AE) research on the shearing process due to the limitation of supporting equipment due to the cube shape of the sample , and the cubic sample cannot be placed in the temperature and pressure chamber for direct shear test under high temperature and high pressure

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