In-situ rock mechanics test system and method

Abstract

The invention relates to an in-situ rock-mass mechanic test system and an in-situ rock-mass mechanic test method. The invention aims at providing an in-situ rock-mass mechanic test system and an in-situ rock-mass mechanic test method, for controlling the relaxation degree of a test sample, and obtaining a relaxed rock mass which is easy to unload in original-state excavation and rock-mass parameters under a certain determined relaxation degree. The technical scheme of the invention is as follows: the system selects the test sample on surrounding rock, a circle of peripheral anchor hole grooves is excavated in the periphery of the test sample, test sample radial pressing devices are arranged in the peripheral anchor hole grooves, and test sample axial pressing devices are arranged on the top surface of the test sample; a radial deformation measurement meter is arranged in each peripheral anchor hole groove, corresponding to each side surface of the test sample, axial deformation measurement meters are arranged on the top surface of the test sample, axial deformation and sound wave measurement holes communicating the top surface and the bottom surface of the test sample are excavated in the test sample, the axial deformation measurement meters are arranged at the bottoms of the axial deformation and sound wave measurement holes; the radial deformation measurement meters and the axial deformation measurement meters are electrically connected with a computer through data lines and an electronic data acquisition system. The in-situ rock-mass mechanic test system and the in-situ rock-mass mechanic test method provided by the invention are suitable for obtaining in-situ rock-mass mechanic parameters.

Description

technical field [0001] The invention relates to an in-situ rock mass mechanics test system and method. It is suitable for obtaining mechanical parameters of in-situ rock mass. Background technique [0002] The mechanical parameters of the undisturbed rock mass are generally obtained by the on-site true triaxial rock mass mechanical test. However, for the relaxed rock mass that is easy to unload during excavation, due to its easy relaxation after excavation, the degree of relaxation of the sample was not checked during the test preparation process. control, the sample has undergone strong relaxation after the preparation is completed, resulting in the test being unable to obtain the mechanical parameters of the undisturbed excavation and easy unloading of the relaxed rock mass, and the test results can only characterize the mechanical properties of the rock mass with a certain degree of relaxation. The general on-site true triaxial rock mass mechanics test method cannot obta...

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Problems solved by technology

[0002] The mechanical parameters of the undisturbed rock mass are generally obtained by the on-site true triaxial rock mass mechanical test. However, for the relaxed rock mass that is easy to unload during excavation, due to its easy relaxation after excavation, the degree of relaxation of the sample was not checked during the test preparation process. control, the sample has undergone strong relaxation after the preparation is completed, resulting in the test being unable to obtain the mechanical parameters of the undisturbed excavation and easy unloading of the relaxed rock mass, and the test results can only characterize the mechanical properties of the rock mass with a certain degree of relaxation

The rock mass mechanical parameters of the undisturbed excavated and easy-unloading relaxed rock mass cannot be obtained by the general on-site true triaxial rock mass mechanics test method, which brings difficulties to evaluate the engineering performance of the excavated easy-unloading loose rock mass and easily leads to misjudgment

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