Improved method for carrying out rock shearing test by using rock triaxial compression apparatus

Abstract

The invention discloses an improved method for carrying out rock shearing test by using a rock triaxial compression apparatus. An assembled die adopted for test of the rock triaxial compression apparatus comprises a jack pressure head (1), a pressure chamber (2), a pair of rigid stepped cylindrical base plates (5) and a pair of flexible semi-cylinder base plates (6). The assembled die adopted by the invention inherits the advantages of rock triaxial compression test, and steady confining pressure is provided for a rock sample (3) by the pressure chamber (2); according to axial force exerted when a rock sample is damaged and in combination with the elasticity modulus E1 of the rigid stepped cylindrical base plates and the elasticity modulus E2 of the flexible semi-cylinder base plates, pressures F1 and F4 applied by the two rigid stepped cylindrical base plates to the rock sample and pressures F2 and F3 applied by the two flexible semi-cylinder base plates to the rock sample can be computed, so as to further determine the shearing force delta F on the shearing surface of the rock; the shear strength of the rock can be obtained according to the relation between the shearing force and the shearing area on the shearing surface, so that a triaxial tester can be directly used for measuring the shear strength of the rock.

Description

technical field [0001] The present invention relates to a rock shear test method and equipment with a rock triaxial compression instrument, in particular to a test method and test equipment improvement for shear strength and strength parameters of rock under a three-dimensional stress state, and is suitable for mines, water conservancy, resources and Indoor shear tests on rocks in the environment and other fields. Background technique [0002] The mining of deep mineral resources in my country, the stability analysis of high and steep slopes, the development of water conservancy and hydropower resources, and the disposal of nuclear waste generally involve the deformation stability of surrounding rocks in complex environments. Premises and foundations for simulation and stability analysis. The indoor shear test of rock is an important means to obtain the shear strength and its related parameters. At present, the test methods for the shear strength of rock include direct shear...

AI Technical Summary

Problems solved by technology

However, due to the inhomogeneity of the rock and soil itself and the high requirements for the sampling and test process of the triaxial test, it is inevitable that such and other problems will occur in actual operation, which often leads to a large dispersion of test results, so the analysis leads to test dispersion. It is an important responsibility of the soil test personnel to summarize and improve the inadequacies in the test process, so as to ensure the accuracy of the shear strength index.”

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