Method for preparing fractured rock mass samples with filler

A cracked rock mass and fissure technology, applied in the field of rock mass sample preparation, can solve problems such as crack failure, rock mass failure, inflexibility, etc., achieve good dry shrinkage and crack resistance, protect the crack structure, and reduce costs. Effect

Inactive Publication Date: 2016-06-15
HOHAI UNIV
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Problems solved by technology

[0004] 1. In the Chinese utility model patent "Combined Three-dimensional Fractured Rock Sample Mold" with the patent number of 201520131517.4, a three-dimensional fractured rock sample preparation mold is disclosed. The composition of the adjustment device; when making rock samples of different shapes and geometric sizes, it is necessary to make new molds, which is time-consuming and labor-intensive, and the cost is high;
[0005] 2. In the Chinese invention patent application with the application number of 201410052815.4 "A Method for Making Randomly Cracked Rock Samples", a method of mixing tin bars and mortar materials, and turning the tin bars into powder at low temperature to form cracks and cracks is disclosed. The preparation method of random fractured rock samples; the fractured rock samples produced by this method cannot control the size, spatial shape, quantity and distribution of cracks, and cannot meet the test requirements;
[0006] 3. In the Chinese invention patent application with the application number of 201510101177.5 "Method for making rock sample model for intermittently filling cracks", it is disclosed that a thin slice material for simulating cracks is

Method used

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  • Method for preparing fractured rock mass samples with filler
  • Method for preparing fractured rock mass samples with filler

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preparation example Construction

[0023] Such as figure 1 , The method for preparing a rock mass sample containing filled fractures of the present invention includes the following steps:

[0024] (1) Construct a three-dimensional digital model of the sample to be prepared according to the geometry of the actual fractured rock mass and the shape and distribution of the fractures in the rock mass, and input the three-dimensional digital model into a 3D printer;

[0025] For example, the 3D digital model of the actual fractured rock mass can be constructed by using SolidWorks software. When constructing the 3D digital model of the actual fractured rock mass, the model is generally a column of Φ50mm×100mm, and different sizes can also be established according to the requirements of the experiment. The model; by making a three-dimensional digital model, the size, spatial shape, number and distribution of the cracks can be accurately controlled, and the obtained samples can completely simulate the structure and mechanical...

Embodiment

[0031] Prepare and simulate a rock mass sample containing filling fractures at the foundation of a large hydropower station dam. The foundation of this large hydropower station is composed of a rock mass with a fracture surface, which is called a dam foundation rock mass.

[0032] (1) Determine the length and width, spatial distribution and number of the cracks in the dam foundation rock mass through the description, measurement and analysis of the cracks in the rock mass of the dam, and determine the geometric dimensions of the sample to be prepared, the length and width of the cracks, and the length and width of the cracks in accordance with similar relationships. The distribution characteristics of the cracks such as spatial distribution and number; use computer-aided design software (SolidWorks) to construct a three-dimensional digital model of the sample to be prepared, the model is a cylinder of Φ50mm×100mm, such as figure 2 ;

[0033] (2) Prepare raw materials: simulate the...

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Abstract

The invention discloses a method for preparing a rock mass sample with filling fissures. model, and input the three-dimensional digital model into the 3D printer; (2) simulate the actual fractured rock mass to prepare the rock block part for forming the sample and the raw materials for the crack filling, and use water-soluble materials as raw materials to form the sample The above three raw materials were placed in different nozzles of the 3D printer, and a preliminary sample containing the filling was obtained by 3D printing; (3) The preliminary sample was soaked in water to completely dissolve the water-soluble material to obtain final sample. The invention does not need to use a mold to prepare the sample, and the prepared sample contains fillers, which overcomes the defect in the prior art that powdery solid particles cannot be filled into cracks of the sample to form fillers.

Description

Technical field [0001] The invention relates to a method for preparing a rock mass sample, in particular to a method for preparing a rock mass sample containing filling fractures. Background technique [0002] Fractured rock mass is a medium often encountered in engineering. The main difference between fractured rock mass and intact rock is that the fractured rock mass contains more structural surfaces, and the mechanical properties of the fractured rock mass are mainly controlled by these structural surfaces. Test is a research method often used in the field of rock mechanics. However, because of the variability of the geometric properties of natural fractured rock masses, the fissures of different rock masses are very different. The rock mass samples taken from natural fractured rock masses are not representative, and the site The experimental working conditions are complicated and the investment is large. Therefore, the mechanical properties of fractured rock masses are usual...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 赵恺王环玲徐卫亚巢志明夏季贾朝军林志南王苏生孟庆祥杨兰兰徐贝贝
Owner HOHAI UNIV
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