Test method for deformation modulus of jointed rock mass

A technology of deformation modulus and jointed rock mass, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of low test cost, difficulty in processing rocks into rods, and high measured values

Active Publication Date: 2017-06-30
JIANGXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the advantages of low test cost, and the test results can reflect the dynamic characteristics of the medium. The disadvantage of this method is that it is not convenient for large-scale testing and rocks with well-developed joints are difficult to process into rods, etc.
The wave propagation method is to study the propagation law of the stress wave in the rock mass and establish the relationship between the motion parameters and the rock mass modulus. This method has the advantages of rapid testing, low testing cost, and convenience for large-scale and large-scale testing. The value is much higher than the value measured by the static method

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  • Test method for deformation modulus of jointed rock mass
  • Test method for deformation modulus of jointed rock mass
  • Test method for deformation modulus of jointed rock mass

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Embodiment Construction

[0067] Adopt the present invention to carry out undisclosed test in domestic certain open-pit mining mine, concrete implementation steps are as follows.

[0068] Step 1: Deformation modulus test of jointed rock mass

[0069] The joint rock deformation modulus test includes two aspects of work, as follows:

[0070] (1) Select rock blocks on site, process the rock blocks into standard rock samples, and test the density of the rock blocks to be 2520kg / m 3 , the Poisson's ratio of rock samples tested by the rock mechanics test system (RMT-150C) is 0.22.

[0071] (2) The deformation modulus dynamic test of the jointed rock mass was carried out on a temporary step formed by open-pit mining. The width of the step is about 72m, and the hole is drilled vertically downward with a down-the-hole drill. The hole diameter is 70mm and the hole depth is 12.0m. Arrange a measuring line on the surface of the steps, arrange 5 measuring points along the measuring line, and use gypsum powder to ...

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Abstract

The invention relates to the jointed rock deformation modulus testing technology and provides a jointed rock deformation modulus testing method based on building a free interface incident wave separation algorithm in viscoelastic media. The method includes: testing jointed rock deformation modulus; building the reflection coefficient calculation formula of stress waves, in the viscoelastic media, on a free interface; acquiring incident P waves and SV waves according to testing point waveform separation; performing amplitude compensation of spherical dispersing; calculating the elastic modulus and viscose coefficient of a jointed rock; calculating the jointed rock deformation modulus. The method has the advantages that rock deformation modulus under different peak frequency dynamic load effects is obtained through testing; when peak frequency is small, the deformation modulus is static; when peak frequency is large, the deformation modulus is dynamic; corresponding deformation modulus can be selected according to the dynamic load feature borne by a rock project to perform related dynamic analysis, and the method is simple to operate and low in testing cost.

Description

technical field [0001] The invention relates to a joint rock mass deformation modulus test technology, and proposes a joint rock mass deformation modulus test method on the basis of establishing a free interface incident wave separation algorithm in a viscoelastic medium. Background technique [0002] Rock mass deformation modulus test methods are divided into two categories: static test and dynamic test, and dynamic test methods include resonance method and wave propagation method. Affected by the structure of rock mass, its mechanical parameters have multi-scale characteristics. In order to obtain the mechanical parameters of rock mass more accurately, it is usually necessary to test the mechanical parameters of rock mass on site. [0003] The methods for statically testing the deformation modulus of rock mass on site mainly include: flat jack method, including rigid and flexible bearing plate loading methods; test hole method, including hydraulic loading and pressure pill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/313
Inventor 王观石胡世丽李志文刘单权罗嗣海
Owner JIANGXI UNIV OF SCI & TECH
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