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Preparation method for fracture developer and method for applying fracture developer to detection of rock fractures

A technology of rock mass fissures and developer, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of not accurately reflecting the actual deformation of the cracked rock mass, the stability of the rock mass, weakening the strength of the rock mass, and a large number of drilling holes, etc., to achieve Prevent engineering geological disasters, improve flow performance, and enhance the effect of dielectric difference

Inactive Publication Date: 2019-01-29
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existence of the crack network seriously weakens the strength of the rock mass, which brings great difficulties to the construction of rock mass engineering: on the one hand, practice shows that the instability and damage of rock mass engineering are closely related to the expansion and penetration of internal cracks; on the other hand, due to There is no better method to detect the distribution of fracture networks in actual rock mass, so researchers usually can only assume the distribution form of fracture networks when analyzing underground engineering, which leads to numerical simulation results that cannot accurately reflect fractured rock mass The actual deformation and rock mass stability of
[0003] According to the records of existing data, Li Weiteng and others proposed a three-dimensional detection system and detection method for rock mass cracks (Chinese patent application number is CN2016100350771). In this method, several medium injection holes and medium injection holes are constructed in the rock mass Parallel detection holes form a three-dimensional deployment control state sensor in the fractured rock mass, but this method requires a large number of drilling holes, the actual application is more complicated, and the cost is higher; Sun Bi et al. proposed a method based on CT dynamic scanning The three-dimensional reconstruction method of fracture mesoscopic evolution (Chinese patent application number is CN2017103026825), but this method can only operate and observe indoor samples, and there is still a long way to go in engineering
It can be seen that there are still many defects in the existing rock mass crack detection methods.

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  • Preparation method for fracture developer and method for applying fracture developer to detection of rock fractures

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preparation example Construction

[0047] A preparation method of a crack developer, which comprises the following steps:

[0048] S01: Prepare the crack developer masterbatch, pre-mix the nano-metal powder with 3 to 15 parts by weight and the microcrystalline graphite material with 1 to 5 parts by weight through a powder high-speed mixer to obtain The powder mixture is used as the crack developer masterbatch;

[0049] S02: Prepare crack developer fillers, add barium titanate to the polymer matrix, and perform 20 to 30 times of solid-phase shear milling to prepare high-dielectric polymers as crack developer fillers, wherein the cracks The volume fraction of the barium titanate in the developer filler is 0.3 to 0.5;

[0050] S03: Add 1 to 5 parts by weight of the cracked developer masterbatch and 0.2 to 0.5 parts by weight of the cracked developer filler into a high-speed stirring disperser, and stir for 5 to 15 minutes to obtain Fracture developer composites;

[0051] S04: adding distilled water to the composi...

Embodiment 1

[0065] Embodiment 1, a preparation method of a crack developer, which comprises the following steps:

[0066] S01: Prepare crack developer masterbatch, pre-mix 3 parts by weight of iron powder and 1 part by weight of chopped carbon fiber through a powder high-speed mixer to prepare a powder mixture as crack developer masterbatch grain;

[0067] S02: Prepare crack developer fillers, add barium titanate to polypropylene, and perform 20 times of solid phase shear milling to prepare high dielectric polymers as crack developer fillers, wherein the crack developer fillers The volume fraction of the barium titanate is 0.3, and the volume fraction of the polypropylene is 0.7;

[0068] S03: Add 1 part by weight of the cracked developer masterbatch and 0.2 parts by weight of the cracked developer filler into a high-speed stirring disperser, and stir for 5 minutes to obtain a cracked developer composite material;

[0069] S04: adding distilled water to the composite material of the cra...

Embodiment 2

[0071] Embodiment 2, a preparation method of a crack developer, which comprises the following steps:

[0072] S01: Prepare cracked developer masterbatch, pre-mix 3 parts by weight of copper powder and 1 part by weight of carbon fiber particles through a powder high-speed mixer, and prepare a powder mixture as cracked developer masterbatch ;

[0073] S02: Prepare crack developer fillers, add barium titanate to polypropylene, and perform 25 times of solid-phase shear milling to prepare high dielectric polymers as crack developer fillers, wherein the crack developer fillers The volume fraction of the barium titanate is 0.4, and the volume fraction of the polypropylene is 0.6;

[0074] S03: Add 3 parts by weight of the cracked developer masterbatch and 0.5 parts by weight of the cracked developer filler into a high-speed stirring disperser, and stir for 5 minutes to obtain a cracked developer composite material;

[0075] S04: adding distilled water to the composite material of t...

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Abstract

The invention relates to a preparation method for a fracture developer and a method for applying the fracture developer to the detection of rock fractures. The preparation method comprises the following steps: S01, uniformly mixing nanometer metal powder with a microcrystalline graphite material in advance to obtain a fracture developer masterbatch; S02, adding barium titanate into a polymer matrix and performing solid-phase shearing and milling to obtain a fracture developer filler; S03, adding the fracture developer masterbatch and the fracture developer filler into a high-speed stirring disperser, and carrying out stirring to obtain a fracture developer composite material; S04, adding distilled water into the fracture developer composite material, and performing diluting and high-speedstirring to obtain a mixed solution; and S05, adding a lubricant and a thickener into the mixed solution, and performing stirring at a high speed to obtain a turbid liquid which is the fracture developer. The invention has the beneficial effects that the fracture developer has the characteristics of a high dielectric constant, low dielectric loss, good stability and the like; and the turbid liquidhas good uniformity, high adhesion, good fluidity, identifiability, high portability, and other performance.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a preparation method of a fissure developer and an application method for detecting rock mass fissures. Background technique [0002] With the rise and development of underground projects such as underground storage of natural gas, underground disposal of high-level radioactive nuclear waste, and underground tunnels, the stability of underground rock mass has become a key factor in solving engineering problems. However, the complex fracture network of the rock mass leads to non-uniform and nonlinear anisotropy in the engineering structure and mechanical properties of the rock mass. The existence of the crack network seriously weakens the strength of the rock mass, which brings great difficulties to the construction of rock mass engineering: on the one hand, practice shows that the instability and damage of rock mass engineering are closely related to the expansion ...

Claims

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Application Information

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IPC IPC(8): G01N27/22
CPCG01N27/221
Inventor 唐旭海刘泉声李平
Owner WUHAN UNIV
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