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Simulation testing method for testing stress state and response of deep rock mass

A technology of stress state and simulation testing, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problem of large influence of numerical analysis, lack of research methods in deep rock mass, and on-site test and test construction. Long-term problems, to achieve the effect of convenient operation, clear thinking, and strong scientific basis

Active Publication Date: 2016-06-08
PLA UNIV OF SCI & TECH
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Problems solved by technology

Among the existing research methods: theoretical research is difficult to analyze accurately, numerical analysis is greatly affected by constitutive characterization, field tests are affected by construction for a long period, and currently there is no effective research method for deep rock mass

Method used

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  • Simulation testing method for testing stress state and response of deep rock mass
  • Simulation testing method for testing stress state and response of deep rock mass
  • Simulation testing method for testing stress state and response of deep rock mass

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Embodiment Construction

[0040] The simulation test method of the present invention is based on the excavation parameters set for a certain deep rock mass project and based on similar theories. The steps can be found in figure 1 ,details as follows:

[0041] 1. Initial calculation of deep rock mass stress and explosion disturbance

[0042] This initial calculation is based on some parameters of the preliminary design of deep rock mass engineering. For example, the buried depth of a deep underground tunnel project is 2000m underground, the tunnel diameter is Φ20m, and the tunneling length is 5m / d-50m / d. It is assumed that it is subjected to a closed underground explosion disturbance with an explosion equivalent of 100ktTNT. According to the above-mentioned design parameters, the following static ground stress and peak stress are calculated.

[0043] a. Initial calculation of static ground stress P

[0044] The static ground stress of the specimen can be simulated as the principal stress in the vertical direc...

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Abstract

The invention relates to a simulation testing method for testing stress state and response of deep rock mass based on similarity theory. The method comprises the steps of: (1) initially calculating the stress and the explosion disturbance of the deep rock mass; (2) determining a similar scale C; (3) calculating analog quantities relative to a test piece based on the similar scale C; (4) applying a simulated static formation stress to the test piece; (5) carrying out excavation unloading disturbance testing to the test piece; and (6) carrying out explosion disturbance testing to the test piece. The simulation testing method has the beneficial effects that: the scientific phenomenon of the deep rock mass can be simulated and researched in a laboratory room, the similarity theory is used as theoretical basis, the scientific basis is strong, the method can simulate by steps through 'one high and twice disturbance' and is in accordance with the actual conditions, the whole simulation study process is clear and the operation is convenient.

Description

Technical field [0001] The invention relates to a method for simulating scientific phenomena of deep rock mass characteristics, in particular to a simulation test method for the stress state and response of the deep rock mass. Background technique [0002] Deep underground projects involve mining, transportation, water conservancy and hydropower, deep geological disposal of nuclear waste, national strategic energy reserves and national strategic protection projects, and are related to national security and national economy and people's livelihood. Underground engineering construction over 1000 meters deep and the impact and disturbance of the explosive ground will form the characteristics of "one high and two disturbances" (high ground stress, excavation unloading disturbance, explosive ground impact disturbance) under the action of high ground stress, static and dynamic Characteristic scientific phenomena, such as zonal rupture, rock burst, ultra-low friction, and swing waves, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N3/10G01N3/307
CPCG01N3/00G01N3/10G01N3/307
Inventor 李杰王明洋高康华邱艳宇张德志马林建范鹏贤戎晓力王德荣
Owner PLA UNIV OF SCI & TECH
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