Multifunctional true triaxial rock drilling test system and test method for characterizing the characteristics of rocks

Abstract

The invention discloses a multifunctional true triaxial rock drilling test system and a test method for characterizing the characteristics of rocks. According to the method, a test piece is drilled for several times to obtain different rock cores, then the rock cores are subjected to single axial tests and triaxial tests so as to obtain a plurality of sets of mechanical property parameters; then a true triaxial rock drilling tester that can directly measure the parameters while drilling is used to obtain a plurality of sets of parameters while drilling; a mathematical relationship between the mechanical property parameters and the parameters while drilling can be established, and thus the mechanical property parameters can be obtained only through measuring the parameters while drilling of rocks according to the mathematical relationship. According to the method, a multifunctional true triaxial rock drilling tester is taken as the preset test apparatus; the tester can perform true triaxial loading on a test piece and is capable of simulating the drilling process when a test piece is pressed from three directions in underground engineering; the relationship between the parameters while drilling and mechanical characteristics of rocks under different pressures on a test piece can be established, and the test method comprises specific steps from sample preparation to data processing.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering investigation, in particular to a multifunctional true triaxial rock drilling test system and a test method for characterizing rock mass characteristics. Background technique [0002] With the rapid development of the economy and the continuous progress of human society, the rapid development of infrastructure construction, when building tunnels, subways or roadways, it is necessary to support the tunnels, subways or roadways to ensure the stability of underground projects and prevent accidents. However, the support form and support strength of underground engineering need to be determined according to the mechanical properties of the surrounding rock of the underground engineering. At present, the acquisition of the mechanical property indicators of the surrounding rock still adopts the method of drilling cores on site and performing rock mechanics tests on the cores in the labora...

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Problems solved by technology

[0004] 1. The existing drilling device is static penetration testing, and the probe penetration method is a direct press-in type, which can directly drill for silt, sandy soil and soft rock, but it is difficult to drill for harder rock and soil layers

[0005] 2. The factors affecting drilling considered are relatively simple, and the influence of three-dimensional stress on the drilling process cannot be considered

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