WO2022083134A1

WO2022083134A1 - Rock-like similar material and preparation method therefor

Info

Publication number: WO2022083134A1
Application number: PCT/CN2021/099213
Authority: WO
Inventors: 崔春阳; 齐庆新; 李海涛; 李春元; 杨冠宇; 王守光; 贺小凡
Original assignee: 煤炭科学研究总院
Priority date: 2020-10-19
Filing date: 2021-06-09
Publication date: 2022-04-28
Also published as: AU2021355607B2; CN112480601A; CN112480601B; AU2021355607A1

Abstract

A rock-like similar material and a preparation method therefor. The preparation method comprises: acquiring an aggregate composition of a target rock and a volume ratio of an aggregate cement; mixing, stirring and curing a corresponding mass of a first epoxy resin, a first rosin and a first curing agent according to the aggregate composition, and then crushing same to the same extent as the average particle diameter of the aggregate of the target rock to obtain an epoxy resin aggregate; according to a strength scale of a rock-like similar material, mixing and stirring a corresponding mass of a second epoxy resin, a second rosin and a second curing agent to obtain a liquid epoxy resin cement; and according to the volume ratio of the aggregate cement, mixing, stirring and curing a corresponding mass of the epoxy aggregate and the epoxy cement, so as to obtain the rock-like similar material. The method uses the epoxy resins to prepare the rock-like similar material. The prepared rock-like similar material has the advantages of low density and low strength, and has lower impact energy and higher safety during a breaking process.

Description

Rock-like material and preparation method thereof

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application number "202011119285.2" filed by the General Research Institute of Coal Science on October 19, 2020, with the application title "Rock-like material and its preparation method".

technical field

The present application relates to the technical field of similar materials, in particular to a rock-like material and a preparation method thereof.

Background technique

At present, in the related research of coal mining, it is often necessary to carry out dynamic simulation tests on the rock failure process. In the test, similar materials need to be made into similar models, and then the deformation and failure of similar models under external action are observed. The similarity criterion is used to deduce the deformation and failure of rock, which provides a scientific basis for the design of coal mining engineering. However, the density and strength of similar materials in the related art are relatively high, and the impact energy generated during the failure of similar models in the test is also relatively large, which brings great potential safety hazards to on-site personnel and construction operations.

SUMMARY OF THE INVENTION

The present application aims to solve one of the technical problems in the above technologies at least to a certain extent. Therefore, an object of this application is to propose a method for preparing a rock-like material, using epoxy resin to prepare a rock-like material, and the prepared rock-like material has the advantages of low density and low strength, so that the rock-like material The similar model produced also produces less impact energy during the destruction process, which ensures the safety of on-site personnel and construction operations.

A second object of the present application is to propose a rock-like material.

In order to achieve the above purpose, the first aspect of the present application proposes a method for preparing a rock-like material, including: obtaining the aggregate composition of the target rock and the volume ratio of the aggregate binder; After the first epoxy resin, the first rosin and the first curing agent of high quality are mixed, stirred and cured, they are crushed to the same degree as the average particle diameter of the aggregate of the target rock to obtain the epoxy resin aggregate; according to the rock-like The strength scale of similar materials, after mixing and stirring the corresponding quality of the second epoxy resin, the second rosin and the second curing agent, a liquid epoxy resin cement is obtained; according to the volume ratio of the aggregate cement, After mixing, stirring and curing the epoxy resin aggregate and the epoxy resin cement of corresponding quality, the rock-like material is obtained.

The method for preparing a rock-like material in the embodiment of the present application can prepare epoxy resin aggregate and liquid epoxy resin cement according to epoxy resin, rosin and curing agent respectively, and then according to the volume of the aggregate cement in the target rock Compared with the related art, most of the rock-like materials are prepared by using cement gypsum sand materials. This method uses epoxy resin The rock-like material prepared by resin has the advantages of low density and low strength, so the similar model made of this kind of rock-like material also produces less impact energy during the failure process, which ensures that the on-site personnel can communicate with each other. Safety of construction work.

In addition, the method for preparing the rock-like material proposed according to the above embodiments of the present application may also have the following additional technical features:

In an embodiment of the present application, the method further includes: obtaining the porosity of the target rock; in the process of mixing and stirring the epoxy resin aggregate and the epoxy resin cement, according to the Add the corresponding quality of foaming agent or defoamer to the porosity.

In an embodiment of the present application, the mixing, stirring and curing of the first epoxy resin, the first rosin and the first curing agent of corresponding quality according to the aggregate composition includes: according to the aggregate composition determining a first mass ratio of the first epoxy resin, the first rosin and the first curing agent; determining the first mass ratio according to the required total mass of the epoxy resin aggregate and the first mass ratio a first required quality of the epoxy resin, the first rosin and the first curing agent; according to the first required quality, the corresponding quality of the first epoxy resin, the first rosin and the The first curing agent is mixed, stirred and cured.

In an embodiment of the present application, the method further includes: obtaining a size scale of the dynamic simulation experiment; according to the size scale of the dynamic simulation experiment and the density scale of the polymer material, using the dynamic similarity criterion, calculating The strength scale of the rock-like material.

In an embodiment of the present application, the mixing and stirring of the second epoxy resin, the second rosin and the second curing agent of corresponding masses according to the strength scale of the rock-like material, including: according to the rock-like material The strength scale of similar materials determines the second mass ratio of the second epoxy resin, the second rosin and the second curing agent; according to the required total mass of the epoxy resin cement and the second The mass ratio determines the second required mass of the second epoxy resin, the second rosin and the second curing agent; according to the second required mass, the corresponding mass of the second epoxy resin, the The second rosin and the second curing agent are mixed and stirred.

In an embodiment of the present application, the method further includes: scanning the target rock with a CT imaging machine; acquiring the aggregate composition and the volume ratio of the aggregate binder according to the scanning result.

In an embodiment of the present application, the method further includes: scanning the target rock with a CT imaging machine; and obtaining the porosity according to the scanning result.

In an embodiment of the present application, the method further includes: crushing with an aggregate crusher.

In an embodiment of the present application, the method further includes: scanning the target rock with a CT imaging machine; obtaining fracture structure data of the target rock according to the scanning result; The macrostructural plane of the rock-like material is sculpted.

In order to achieve the above object, the second aspect embodiment of the present application proposes a rock-like material, the rock-like material is prepared by using the method for preparing a rock-like material described in the first aspect embodiment, and the rock-like material is similar. Materials include: epoxy aggregate and epoxy cement.

The rock-like material of the embodiment of the present application, compared with the related art, which mostly uses cement gypsum sand materials to prepare the rock-like material, and epoxy resin is used to prepare the rock-like material in the present application, and the prepared rock-like material has the density Due to the advantages of low strength and low strength, the impact energy generated by similar models made of similar rock materials during the failure process is also small, which ensures the safety of on-site personnel and construction operations.

Additional aspects and advantages of the present application will be set forth, in part, in the following description, and in part will be apparent from the following description, or learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a flowchart of a method for preparing a rock-like material according to an embodiment of the present application;

2 is a flow chart of mixing, stirring and curing a first epoxy resin, a first rosin and a first curing agent of corresponding quality according to the aggregate components in the method for preparing a rock-like material according to an embodiment of the present application;

Fig. 3 is a method of mixing and stirring a second epoxy resin, a second rosin, and a second curing agent of corresponding quality according to the strength scale of the rock-like material in the method for preparing a rock-like material according to an embodiment of the present application flow chart;

4 is a flow chart of mixing and stirring epoxy resin aggregates and epoxy resin binders of corresponding quality in a method for preparing a rock-like material according to an embodiment of the present application; and

FIG. 5 is a schematic diagram of a method for preparing a rock-like material according to an embodiment of the present application.

Reference number:

1: target rock; 2: macrostructure surface of target rock; 3: cement matrix of target rock; 4: skeleton particles of target rock; 5: micro-cracks of target rock; 6: the first part of the ring with epoxy resin aggregates Oxygen resin; 7: The second part of epoxy resin with epoxy resin aggregate; 8: The first part of epoxy resin with epoxy resin cement; 9: The second part of epoxy resin with epoxy resin cement; 10: epoxy resin aggregate; 11: epoxy resin cement; 12: pores; 13: rock-like material; 14: macrostructure surface of rock-like material.

Detailed ways

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application.

The split-type bearing platform and the side-assist coal mining equipment used in the side-assist coal mining equipment according to the embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a flow chart of a method for preparing a rock-like material according to an embodiment of the present application.

As shown in FIG. 1, the preparation method of the rock-like material according to the embodiment of the present application includes:

S101 , obtaining the aggregate composition and the volume ratio of the aggregate binder of the target rock.

It should be noted that the target rock is composed of aggregate and cement, the aggregate includes particulate matter in the target rock, and the cement includes cement (cement matrix) in the target rock.

Optionally, the aggregate composition of the target rock and the volume ratio of the aggregate binder can be obtained through statistical data of the target rock, and the statistical data includes the data of the aggregate composition and the volume ratio of the aggregate binder of the target rock.

Optionally, the aggregate composition of the target rock and the volume ratio of the aggregate binder can also be obtained directly by detecting the target rock. For example, the target rock can be scanned by a Computed Tomography (CT) imaging machine, and the aggregate composition and the volume ratio of the aggregate binder of the target rock can be obtained according to the scanning result. For example, the target rock can be sampled by a coring machine to obtain a sample of the target rock, and then the sample of the target rock can be scanned by a CT imaging machine, and the aggregate composition and volume ratio of the aggregate binder of the target rock can be obtained according to the scanning results.

S102, according to the aggregate composition, after mixing, stirring and curing the first epoxy resin, the first rosin and the first curing agent of corresponding quality, crushed to the same extent as the average particle diameter of the aggregate of the target rock, to obtain epoxy resin Resin aggregate.

In the embodiment of the present disclosure, the epoxy resin aggregate can be made according to the first epoxy resin, the first rosin and the first curing agent, as the aggregate of the rock-like material.

When preparing epoxy resin aggregate, the required mass of the first epoxy resin, the first rosin and the first curing agent can be obtained according to the aggregate composition of the target rock, and then the corresponding mass of the first epoxy resin, the first epoxy resin and the first curing agent can be obtained. After the first rosin and the first curing agent are mixed, stirred and cured, they are crushed to the same extent as the average particle diameter of the aggregate of the target rock, so as to obtain the epoxy resin aggregate.

Optionally, the duration of mixing and stirring the first epoxy resin, the first rosin and the first curing agent of the corresponding quality should be less than the preset duration threshold to avoid the first epoxy resin, the first rosin and the first curing. The mixed material composed of the agent is cured in advance, so that the strength of the epoxy resin aggregate is more stable. The duration threshold can be set according to the actual situation, for example, it can be set to 10 minutes.

Optionally, after mixing and stirring the first epoxy resin, the first rosin and the first curing agent of corresponding quality, the obtained mixed material can be put into a constant temperature and humidity box for curing, so as to obtain an epoxy resin with stable strength. Resin aggregate.

It can be understood that, after mixing, stirring and curing the first epoxy resin, the first rosin and the first curing agent of corresponding quality, they can be broken to the same extent as the average particle diameter of the aggregate of the target rock, so that the epoxy The resin aggregate is more similar in structure to the aggregate of the target rock, which helps to improve the meso-similarity of the epoxy aggregate.

Optionally, the target rock can be scanned by a CT imaging machine, and the average particle diameter of the aggregate of the target rock can be obtained according to the scanning result.

Optionally, an aggregate crusher can be used for crushing.

S103 , according to the strength scale of the rock-like material, after mixing and stirring the second epoxy resin, the second rosin and the second curing agent of corresponding quality, a liquid epoxy resin cementing agent is obtained.

In the embodiment of the present disclosure, a liquid epoxy resin cement can be made according to the second epoxy resin, the second rosin, and the second curing agent, as a cement for a rock-like material.

When preparing the liquid epoxy resin cement, the required mass of the second epoxy resin, the second rosin and the second curing agent can be obtained according to the strength scale of the similar rock-like material, and then the corresponding mass of the second epoxy resin can be obtained. After the epoxy resin, the second rosin and the second curing agent are mixed and stirred, a liquid epoxy resin adhesive is obtained.

The strength scale of the rock-like material refers to the ratio of the strength of the rock-like material to the strength of the target rock. For example, if the strength of the rock-like material is 0.1 MPa (megapascal) and the strength of the target rock is 30 MPa, the strength ratio of the rock-like material is 1:300.

Optionally, obtaining the strength scale of the rock-like material may include obtaining the size scale of the dynamic simulation experiment, and then, according to the size scale of the dynamic simulation experiment and the density scale of the polymer material, using the dynamic similarity criterion, calculate Obtain the strength scale of rock-like materials.

The size scale of the dynamic simulation experiment refers to the ratio of the size of the similar model made of similar rock-like materials to the size of the target model composed of the target rock in the dynamic simulation experiment. For example, if the similar model made of similar rock-like materials and the target model composed of the target rock are all cubes, the side length of the similar model is 5 meters, and the side length of the target model is also 5 meters, the size scale of the dynamic simulation experiment It is 1:1, and the dynamic simulation experiment is also a prototype scale experiment at this time.

The density scale of the polymer material refers to the ratio of the density of the polymer material to the density of the target rock, which is a fixed value of 1.1:2.5.

Among them, the dynamic similarity criterion can include a variety of criteria such as the similarity between the elastic force and the inertial force, the similarity between the elastic force and the self-gravity, etc., which can be selected according to the actual situation.

In the prior art, the similarity criterion of elastic force and self-gravity is mostly used to obtain the strength scale of similar rock-like materials. However, the similarity criterion of elastic force and self-gravity can only ensure that the performance of the similar model before failure is similar to the target model, and cannot guarantee the similar model. The performance after failure is similar to the target model, that is, the similarity criterion of elastic force and self-gravity cannot simulate the failure process of the target model, and the test accuracy is low.

In the embodiment of the present disclosure, the similarity criterion of elastic force and inertial force can be used to obtain the strength scale of the rock-like material, which can ensure that the properties of the similar model before and after the failure are similar to the target model, and improve the performance of the rock-like material. The mechanical similarity with the target rock can realize the simulation of the failure process of the target model, and the test accuracy is high.

Optionally, the relevant formula for obtaining the strength scale of rock-like materials using the similarity criterion of elastic force and inertial force is as follows:

C _c =C _e =C _p C _L ²

Among them, C _c is the strength scale of the rock-like material, C _e is the modulus scale of the rock-like material, C _p is the density scale of the rock-like material, and C _L is the size scale of the dynamic simulation experiment.

It should be noted that the modulus ratio C _e of the rock-like material refers to the ratio of the modulus of the rock-like material to the modulus of the target rock.

Optionally, the duration of mixing and stirring the second epoxy resin, the second rosin and the second curing agent of the corresponding quality should be less than the preset duration threshold, so as to avoid the second epoxy resin, the second rosin and the second curing agent. The mixed material composed of the agent is cured to obtain a liquid epoxy resin cement. The duration threshold can be set according to the actual situation, for example, it can be set to 10 minutes.

S104 , according to the volume ratio of the aggregate binder, after mixing, stirring and curing the epoxy resin aggregate and the epoxy resin binder of corresponding mass, a rock-like material is obtained.

In the embodiment of the present disclosure, the required mass of epoxy resin aggregate and epoxy resin binder can be obtained respectively according to the volume ratio of the aggregate binder, and then the corresponding mass of epoxy resin aggregate and epoxy resin After the cement is mixed, stirred and cured, a rock-like material is obtained.

Optionally, according to the volume ratio of the aggregate binder, obtain the required mass of the epoxy resin aggregate and the epoxy resin binder respectively, which may include determining the epoxy resin aggregate and the epoxy resin binder according to the volume ratio of the aggregate binder. The third mass ratio of the epoxy resin cement, and then the required total mass of the epoxy resin aggregate and the required total mass of the epoxy resin cement are determined according to the required total mass of the rock-like material and the third mass ratio. For example, if the third mass ratio of epoxy resin aggregate and epoxy resin cement is 5:1, and the total required mass of rock-like material is 60 kg, then the total required mass of epoxy resin aggregate is 50 kg, The total mass of epoxy resin cement required is 10 kg.

Optionally, after mixing and stirring the epoxy resin aggregate and epoxy resin binder of the corresponding quality, the obtained mixed material can be poured into a mold for molding, and then the molded mixed material can also be put into an incubator for curing. , to obtain rock-like materials with stable strength. Wherein, the temperature of the incubator can be 150 degrees Celsius, and the time for putting the formed mixed material into the incubator for curing can be 24 hours.

It can be understood that most of the related technologies use cement gypsum sand materials to prepare rock-like materials. Similar materials have the disadvantages of high density and high strength. Similar models made of similar materials also generate large impact energy during the failure process. , which will bring greater safety hazards to the on-site personnel and construction operations. In this application, epoxy resin is used to prepare rock-like materials. Epoxy resin is a polymer material, and the prepared rock-like materials have low density and strength. Therefore, the impact energy generated by the similar model made of similar rock materials is also smaller during the failure process, which ensures the safety of on-site personnel and construction operations.

It can be understood that, according to the similarity criterion of elastic force and inertial force, the modulus scale and strength scale of rock-like materials are equal, so rock-like materials also have the advantage of low modulus, that is, they have elastic brittleness, which is similar to rock. The mechanical properties are relatively similar.

It can be understood that the epoxy resin has high light transmittance, and the prepared rock-like material also has high light transmittance, which is convenient for observing the internal structure of the material, so that the staff can observe the internal deformation and failure of the similar model during the failure process. . In addition, the high light transmittance also contributes to the internal structure of the laser printed material.

To sum up, according to the method for preparing a rock-like material according to the embodiments of the present application, epoxy resin aggregate and liquid epoxy resin cement can be prepared according to epoxy resin, rosin and curing agent, respectively, and then according to the target rock aggregate The volume ratio of the cementing agent, the epoxy resin aggregate and the epoxy resin cementing agent are mixed, stirred and cured to obtain a rock-like material. Compared with the related art, most of the cement gypsum sand materials are used to prepare the rock-like material. The method uses epoxy resin to prepare rock-like materials. The prepared rock-like materials have the advantages of low density and low strength. Therefore, the impact energy generated by the similar models made of such rock-like materials during the failure process is also small, ensuring that Safety of on-site personnel and construction work.

On the basis of any of the above embodiments, as shown in FIG. 2 , in step S102, according to the aggregate components, the first epoxy resin, the first rosin and the first curing agent of corresponding quality are mixed, stirred and cured, which may include :

S201, determining a first mass ratio of the first epoxy resin, the first rosin and the first curing agent according to the aggregate composition.

It can be understood that, the aggregate composition of the target rock is different, and the first mass ratio of the first epoxy resin, the first rosin and the first curing agent required for preparing the epoxy resin aggregate should also be different.

Optionally, a mapping relationship or a mapping table between the aggregate composition and the first mass ratio can be established in advance, and after the aggregate composition is obtained, the mapping relationship or mapping table can be queried to determine the first epoxy resin required at this time. The first mass ratio of the resin, the first rosin and the first curing agent is used for preparing the epoxy resin aggregate. The mapping relationship or the mapping table can be calibrated according to the actual situation.

S202: Determine the first required mass of the first epoxy resin, the first rosin and the first curing agent according to the required total mass of the epoxy resin aggregate and the first mass ratio.

For example, if the first mass ratio of the first epoxy resin, the first rosin and the first curing agent is 5:1:1, and the total required mass of the epoxy resin aggregate is 70 kg, then the first epoxy resin, the first The first required masses of a rosin and a first curing agent are 50 kg, 10 kg, and 10 kg, respectively.

It should be noted that the relevant content of the required total mass of the epoxy resin aggregate can refer to the above-mentioned embodiment, and details are not repeated here.

S203, mixing, stirring and curing the first epoxy resin, the first rosin and the first curing agent of corresponding quality according to the first required quality.

Therefore, the method can determine the first mass ratio of the first epoxy resin, the first rosin and the first curing agent according to the aggregate composition of the target rock, and then according to the total mass of the epoxy resin aggregate and the first mass ratio Determine the first required quality of the first epoxy resin, the first rosin and the first curing agent, so as to mix, stir and cure the corresponding quality of the first epoxy resin, the first rosin and the first curing agent according to the first required quality , to obtain epoxy resin aggregates.

On the basis of any of the above embodiments, as shown in FIG. 3 , in step S103, according to the strength scale of the rock-like material, the second epoxy resin, the second rosin and the second curing agent of corresponding quality are mixed and stirred , which can include:

S301. Determine a second mass ratio of the second epoxy resin, the second rosin, and the second curing agent according to the strength scale of the rock-like material.

It can be understood that, the strength ratios of the similar rock-like materials are different, and the second mass ratios of the second epoxy resin, the second rosin and the second curing agent required for preparing the liquid epoxy resin cement should also be different.

Optionally, a mapping relationship or a mapping table between the intensity scale and the second mass ratio can be established in advance, and after the intensity scale is obtained, the mapping relationship or mapping table can be queried to determine the second epoxy resin required at this time. The second mass ratio of the resin, the second rosin and the second curing agent is used for preparing the liquid epoxy resin cement. The mapping relationship or the mapping table can be calibrated according to the actual situation.

S302: Determine the second required mass of the second epoxy resin, the second rosin, and the second curing agent according to the required total mass of the epoxy resin cement and the second mass ratio.

S303 , mixing and stirring the corresponding quality of the second epoxy resin, the second rosin and the second curing agent according to the second required quality.

It should be noted that, for the related content of steps S302 to S303, reference may be made to the foregoing embodiments, which will not be repeated here.

Therefore, the method can determine the second mass ratio of the second epoxy resin, the second rosin and the second curing agent according to the strength scale of the rock-like material, and then according to the total mass of the epoxy resin cement and the second mass ratio The mass ratio determines the second required mass of the second epoxy resin, the second rosin and the second curing agent, so that the corresponding mass of the second epoxy resin, the second rosin and the second curing agent are mixed and stirred according to the second required mass , to obtain a liquid epoxy resin adhesive.

On the basis of any of the above-mentioned embodiments, as shown in FIG. 4 , in step S104, mixing and stirring the epoxy resin aggregate and the epoxy resin binder of corresponding quality may include:

S401, obtaining the porosity of the target rock.

It should be noted that the porosity of the target rock refers to the percentage of the pore volume in the target rock to the total volume of the target rock in its natural state.

Optionally, the target rock can be scanned by a CT imaging machine, and the porosity can be obtained according to the scanning result.

S402, in the process of mixing and stirring the epoxy resin aggregate and the epoxy resin binder, a foaming agent or a defoaming agent of corresponding quality is added according to the porosity.

Among them, the foaming agent is used to increase the porosity of the rock-like material, and the defoamer is used to reduce the porosity of the rock-like material.

It can be understood that the porosity of the target rock is different, and the quality of the foaming agent or defoaming agent required to prepare the rock-like material should also be different.

Optionally, a mapping relationship or a mapping table between the porosity and the quality of the foaming agent or defoaming agent can be established in advance. The quality of the foaming agent or defoaming agent used in the preparation of rock-like materials. The mapping relationship or the mapping table can be calibrated according to the actual situation.

Therefore, in the process of mixing and stirring the epoxy resin aggregate and the epoxy resin cement, the foaming agent or defoaming agent of corresponding quality can be added according to the porosity, so that the porosity of the prepared rock-like material can be increased. Similar to the target rock, so that the rock-like material is more similar in structure to the target rock, which helps to improve the meso-similarity of the rock-like material.

On the basis of any of the above-mentioned embodiments, in step S104, after mixing, stirring and curing the epoxy resin aggregate and the epoxy resin cement of corresponding quality, after obtaining a rock-like material, the crack structure of the target rock can also be determined according to the fissure structure of the target rock. Data, using a laser engraving machine to engrave the macroscopic structure of rock-like materials.

It is understandable that there may be a fracture structure in the target rock. In this method, the high light transmittance of epoxy resin can be used to engrave the macroscopic structural plane of the rock-like material by using the laser engraving technology, so that the cracks of the rock-like material can be carved. The structural data is similar to the target rock, so that the rock-like material is more similar in structure to the target rock, which helps to improve the meso-similarity of the rock-like material.

Optionally, the target rock can be scanned by a CT imaging machine, and the fracture structure data of the target rock can be obtained according to the scanning result.

As shown in Figure 5, the target rock 1 can be scanned by the CT imaging machine, and the aggregate composition and the volume ratio of the aggregate binder of the target rock 1 can be obtained according to the scanning results, and then the epoxy resin aggregate used to configure the epoxy resin can be determined according to the aggregate composition. The epoxy resin 6 and the epoxy resin 7 are mixed, stirred, cured and crushed to obtain the epoxy resin aggregate 10, which is determined according to the strength scale of the rock-like material and used for The epoxy resin 8 and the epoxy resin 9 of the epoxy resin adhesive are configured, and the epoxy resin 8 and the epoxy resin 9 are mixed and stirred to obtain a liquid epoxy resin adhesive 11, and then the epoxy resin aggregate can be mixed 10 and liquid epoxy resin cement 11 are mixed, stirred and solidified to obtain a rock-like material 13, and then according to the fracture structure data of the target rock 1, three-dimensional laser fracturing technology can be used to analyze the macroscopic structural plane of the rock-like material 13. 14 for engraving.

As shown in FIG. 5 , in the process of mixing and stirring the epoxy resin aggregate 10 and the liquid epoxy resin binder 11 , a foaming agent or defoaming agent of corresponding quality can also be added according to the porosity of the target rock to form Micro-cell pores 12 .

As shown in FIG. 5 , the target rock 1 may include a macrostructure plane 2, and the macrostructure plane 2 may include natural or artificial structure planes, including but not limited to joint planes, fracture planes, bedding planes, artificial structural planes, and the like.

As shown in FIG. 5 , the scanning result of the target rock 1 scanned by the CT imaging machine may include the cemented matrix 3 , the framework particles 4 and the microcracks 5 of the target rock.

In specific implementation, the mass ratio of standard sand, epoxy resin, curing agent, and foaming agent can be determined according to the aggregate composition of the target rock, the average particle size and particle size distribution of the aggregate particles, and the porosity of the target rock. , and according to the mass ratio of standard sand, epoxy resin, curing agent and foaming agent, a rock-like material is prepared. Among them, the standard sand is used to configure the aggregate of the rock-like material, and the epoxy resin is used to configure the cement of the rock-like material.

As shown in Table 1, when the mass ratios of standard sand, epoxy resin, curing agent and foaming agent are different, the apparent density, uniaxial compressive strength and elastic modulus of the corresponding rock-like materials are also different.

Table 1 Properties of rock-like materials with different mass ratios

As shown in Table 1, when the quality of standard sand, epoxy resin and curing agent are all the same, the quality of foaming agent is different, and rock-like materials can correspond to different apparent density, uniaxial compressive strength and elastic modulus , so that the properties of rock-like materials can be changed by controlling the quality of the foaming agent. For example, when the mass of standard sand, epoxy resin, and curing agent are 500g, 120g, and 60g, respectively, and the mass of the foaming agent is 5g, the apparent density of the rock-like material is 2.07g/cm ³ , and the foaming agent When the mass of the rock-like material is 8 g, the apparent density of the rock-like material is 2.01 g/cm ³ , and when the mass of the foaming agent is 10 g, the apparent density of the rock-like material is 1.94 g/cm ³ , it can be seen that with the foaming As the mass of the agent increases, the apparent density of rock-like materials gradually decreases, and the surface pore density gradually increases.

The present application also proposes a rock-like material. The rock-like material is prepared by using the method for preparing the rock-like material in the above embodiments. The rock-like material includes epoxy resin aggregate and epoxy resin cement.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or indirectly through an intermediary between the first and second features touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations to the present application. Embodiments are subject to variations, modifications, substitutions and variations.

Claims

A method for preparing a rock-like material, comprising:

Obtain the aggregate composition and volume ratio of aggregate binder of the target rock;

According to the aggregate composition, after mixing, stirring and curing the first epoxy resin, the first rosin and the first curing agent of the corresponding quality, they are crushed to the same degree as the average particle diameter of the aggregate of the target rock, to obtain epoxy resin aggregate;

According to the strength scale of similar rock-like materials, after mixing and stirring the second epoxy resin, the second rosin and the second curing agent of corresponding quality, a liquid epoxy resin cement is obtained;

According to the volume ratio of the aggregate binder, after mixing, stirring and curing the epoxy resin aggregate and the epoxy resin binder of corresponding mass, the rock-like material is obtained.
preparation method according to claim 1, is characterized in that, also comprises:

obtaining the porosity of the target rock;

During the mixing and stirring process of the epoxy resin aggregate and the epoxy resin binder, a foaming agent or a defoaming agent of corresponding quality is added according to the porosity.
The preparation method according to claim 1, wherein, according to the aggregate composition, mixing, stirring and curing the first epoxy resin, the first rosin and the first curing agent of corresponding quality, comprising:

Determine the first mass ratio of the first epoxy resin, the first rosin and the first curing agent according to the aggregate composition;

Determine the first required mass of the first epoxy resin, the first rosin and the first curing agent according to the required total mass of the epoxy resin aggregate and the first mass ratio;

The corresponding mass of the first epoxy resin, the first rosin and the first curing agent are mixed, stirred and cured according to the first required mass.
preparation method according to claim 1, is characterized in that, also comprises:

Obtain the size scale of the dynamic simulation experiment;

According to the size scale of the dynamic simulation experiment and the density scale of the polymer material, and using the dynamic similarity criterion, the strength scale of the rock-like-like material is calculated.
The preparation method according to claim 1, wherein, according to the strength scale of the rock-like material, mixing and stirring the second epoxy resin, the second rosin and the second curing agent of corresponding quality, comprising:

determining a second mass ratio of the second epoxy resin, the second rosin and the second curing agent according to the strength scale of the rock-like material;

determining the second required mass of the second epoxy resin, the second rosin and the second curing agent according to the required total mass of the epoxy resin cement and the second mass ratio;

The corresponding mass of the second epoxy resin, the second rosin and the second curing agent are mixed and stirred according to the second required mass.
preparation method according to claim 1, is characterized in that, also comprises:

Scan the target rock by a CT imaging machine;

The volume ratio of the aggregate composition and the aggregate binder is obtained according to the scanning result.
preparation method according to claim 2, is characterized in that, also comprises:

Scan the target rock by a CT imaging machine;

The porosity is obtained from the scan results.
preparation method according to claim 1, is characterized in that, also comprises:

Aggregate crusher is used for crushing.
preparation method according to claim 1, is characterized in that, also comprises:

Scan the target rock by a CT imaging machine;

Obtain the fracture structure data of the target rock according to the scanning result;

According to the fracture structure data, a laser engraving machine is used to engrave the macroscopic structural plane of the rock-like material.
A rock-like material, characterized in that, the rock-like material is prepared by the method for preparing a rock-like material according to any one of claims 1-9, and the rock-like material comprises: epoxy resin Resin aggregates and epoxy binders.