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Method for measuring change law and values of deep-buried hard rock mechanical parameters

A technology of changing rules and mechanical parameters, applied in the direction of applying repeated force/pulsation force to test the strength of materials, etc., to reduce project cost and improve reliability and accuracy

Active Publication Date: 2013-05-01
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology

During this process, the rock mechanical parameters such as deformation parameters and strength parameters inside the EDZ also change accordingly. How to measure and evaluate the change process and law of rock mechanical parameters and obtain the corresponding mechanical parameter values ​​is not yet effective. Solved technical problems

Method used

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  • Method for measuring change law and values of deep-buried hard rock mechanical parameters
  • Method for measuring change law and values of deep-buried hard rock mechanical parameters
  • Method for measuring change law and values of deep-buried hard rock mechanical parameters

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0030] A method for determining the change law and value of mechanical parameters of deep-buried hard rock, which is characterized in that it includes the following steps:

[0031] Step 1: Drill deep-buried hard rock cores on site and process the hard rock cores into cylindrical samples;

[0032] Step 2: Perform a conventional triaxial loading test on the cylindrical rock sample, and set the predetermined value of confining pressure in the triaxial loading test, so as to obtain the peak strength of the cylindrical rock sample at different predetermined values ​​of confining pressure;

[0033] Step 301, install the cylindrical rock sample obtained in step 1 on an existing servo-controlled rock rigidity testing machine, install an axial displacement sensor and a circumferential displacement sensor on the cylindrical rock sample, and ensure real-time data tra...

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Abstract

The invention solves technical problems by providing a method for measuring the change law and the values of deep-buried hard rock mechanical parameters. The method is fulfilled by adopting an axial stress overall-process circulatory loading and unloading experiment in the existence of confining pressure, is mainly used for solving the technical problem of measuring the change law and the values of the mechanical parameters of rock in the surrounding rock damaged zone in underground chambers with deep-buried hard rock, can effectively acquire the change law of the mechanical parameters of rock in the excavation damaged zone, and measures the value of rock mechanical parameters at different variation stages.

Description

Technical field [0001] The invention relates to the technical field of deep-buried hard rock mechanics research, in particular to a method for determining the change law and value of the deep-buried hard rock mechanical parameters. technical background [0002] During the excavation and loading and unloading of deep-buried hard rock underground caverns, excavation damaged zone (EDZ) is easily formed within a certain depth of the surrounding rock. The formation of this kind of cavern EDZ is caused by the combined action of blasting excavation vibration and the strong release of coupled ground stress. In the rock mass inside the EDZ, the original joint fissures gradually expanded, and new fissures continued to occur, resulting in significant changes in the mechanical behavior of the rock mass. At the same time, the bearing capacity of the surrounding rock inside the EDZ decreased with the increase of the rock mass damage. During this process, the rock mechanical parameters such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
Inventor 黄书岭丁秀丽邬爱清段海波吕全纲熊诗湖
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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