CN112067392A - Fluid-solid coupling analog simulation material for reproducing fractures and preparation method - Google Patents
Fluid-solid coupling analog simulation material for reproducing fractures and preparation method Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 116
- 238000004088 simulation Methods 0.000 title claims abstract description 42
- 239000007787 solid Substances 0.000 title claims abstract description 35
- 230000008878 coupling Effects 0.000 title claims abstract description 32
- 238000010168 coupling process Methods 0.000 title claims abstract description 32
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000012188 paraffin wax Substances 0.000 claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 20
- 239000002195 soluble material Substances 0.000 claims abstract description 19
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000011049 filling Methods 0.000 claims abstract description 10
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- 238000010146 3D printing Methods 0.000 claims abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims description 33
- 239000010902 straw Substances 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 12
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- 239000002002 slurry Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
Abstract
The invention discloses a preparation method of a fluid-solid coupling analog simulation material for reproducing fractures, which is suitable for hydrogeology, 3D printing and grouting filling mining physical simulation. The mass ratio is as follows: 70-80% of river sand, 10-15% of talcum powder, 3-5% of hydraulic oil, 2-8% of paraffin, 1-3% of biological cellulose powder and 2% of polyvinyl alcohol pva soluble material. Heating and stirring the materials, placing the materials into a mold for shaping, and enabling the shaped magnetic therapy to be fully contacted with water and completely melted, thereby forming micro cavities with different shapes in the simulation materials to simulate the middle cracks of the rock body; the water-retaining agent does not disintegrate when meeting water, has the water storage and water permeability, and has a good simulation effect in fluid-solid coupling experiments such as simulated water-retaining mining or grouting filling; the strength of the material can be adjusted within a certain range to realize the simulation of different rock stratums, and the raw material has low price, is easy to prepare and can be quickly manufactured in large quantities.
Description
Technical Field
The invention relates to a fluid-solid coupling analog simulation material and a preparation method thereof, in particular to a fluid-solid coupling analog simulation material for reproducing a fracture and a preparation method thereof, which are suitable for physical simulation of hydrogeology, 3D printing and grouting filling mining.
Background
Physical simulation is an important experimental method for researching the problems of mining engineering, and is widely adopted. The traditional analog simulation material mainly comprises sand, gypsum, calcium carbonate and mica, plays an important role in the research of the fields of mine pressure, rock stratum movement and the like, and becomes an important means for the research of the fields. However, the actual mining engineering is diversified, and various problems of interaction between fluids such as water and grout and rock bodies are involved, such as underwater mining, overlying strata isolation grouting filling and other scenes. Particularly for isolation grouting filling of overlying strata, in actual working conditions, after grouting slurry is drained, a rock mass is not disintegrated, and due to the water storage capacity of a natural rock mass, part of the drained water in the slurry is absorbed by water, and the other part of the drained water penetrates through the rock mass to seep to a distance, so that parameters such as grouting pressure and the like are influenced. Only if the material has the capabilities of no disintegration, water absorption and water permeability, the interaction between the water, slurry and other fluids and the rock mass in the actual engineering can be truly reflected, so that the engineering problems can be simulated.
The traditional similar simulation material consisting of sand, gypsum, calcium carbonate and mica is quickly disintegrated after meeting water, and the traditional material is not suitable for simulating the fluid-solid coupling engineering problems due to the water bleeding property of grouting slurry. And a part of novel similar simulation materials have the characteristic of not disintegrating when meeting water, but do not have good water absorption and water permeability, and can not simulate the water storage and water permeability of natural rock materials. Therefore, the existing material cannot be suitable for mining engineering similar simulation under the fluid-solid coupling condition, such as under-water mining, overlying strata isolation grouting filling and other scenes.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a similar simulation material which is not disintegrated when meeting water, has good water storage and water permeability and can have simulated cracks and a preparation method thereof.
The fluid-solid coupling simulation material for the existing fracture is characterized by comprising the following components in parts by mass: 70-80% of river sand, 10-15% of talcum powder, 3-5% of hydraulic oil, 2-8% of paraffin, 1-3% of biological cellulose powder and 2% of polyvinyl alcohol pva soluble material.
The molding hardness of the fluid-solid coupling simulation material for reproducing the fracture is in direct proportion to the mass ratio of the added paraffin, and the material has higher hardness when the paraffin content is higher.
A preparation method of a fluid-solid coupling analog simulation material for reproducing fractures comprises the following steps:
a. mixing river sand, paraffin, talcum powder, hydraulic oil, biological cellulose powder and pva soluble material according to the mass ratio;
b. preparing a pva soluble material into a crack body with the diameter of 0.1mm and the length of 2-5 cm;
c. putting the river sand into an electric heating pot for heating and continuously stirring for 3 minutes, adding talcum powder after the river sand is heated, continuously keeping the temperature and continuously stirring uniformly, wherein the stirring time is about 1 to 3 minutes;
d. after the river sand and the talcum powder are uniformly stirred, adding paraffin into the electric food warmer until the paraffin is melted, continuously keeping the temperature to uniformly stir all the materials for about 3 minutes, then adding hydraulic oil into the electric food warmer, and continuously stirring for 1 minute;
e. after the materials are uniformly stirred, simultaneously adding the straw powder and the pva soluble materials into an electric kettle, and then keeping the temperature to continue stirring for 1-3 minutes;
f. e, filling the uniformly stirred material obtained in the step e into a model container or a mold as required, tamping and paving the material in the process, standing the material for 24 hours, and solidifying and forming the material to obtain a simulated material containing pva;
g. soaking the simulated material containing pva in water for 24-48 hours to ensure that the prefabricated pva soluble material is fully contacted with the water and completely melted, thereby forming micro cavities with different shapes in the simulated material to simulate the middle cracks of the rock body;
h. and obtaining the fluid-solid coupling similar simulation material for reproducing the fracture after the simulation material is dried.
The method is characterized in that: the total volume of all the materials added into the electric heating pot is smaller than the volume 1/2, and the temperature of each material heated in the electric heating pot is 80-100 ℃.
The method is characterized in that:
the river sand is round grains and the like, is used as aggregate, and the strength of the river sand is adjusted within the range of 40-70 meshes;
the talcum powder is used as a regulator, and the mesh range is 325-800 meshes;
the hydraulic oil is antiwear hydraulic oil and is a regulator;
the paraffin is granular solid paraffin serving as a cementing agent, and the industrial grade is within the range of 52# to 58 #;
the biological fiber powder has water absorption property and normal temperature stability, is specifically powdery straw powder, sawdust and corn stalk powder, is used as a water storage and guiding agent, and has a particle size smaller than 1 mm;
the pva soluble material is used as a simulated crack body, is cylindrical, is generated by 3D printing, has a diameter of 0.01-1 mm, is cut into tiny line segments when in use, and is determined according to the thickness of the simulated material, preferably 1/5 of the thickness of the simulated material.
Has the advantages that:
the material simulates cracks based on a 3D printing soluble profile material, and micro cracks can reappear in the material, so that the prepared material has strong permeability; by adding the paraffin, the material can not be disintegrated when meeting water, and the defects that the traditional similar material can not be disintegrated when meeting water, and can not simulate mining engineering problems such as mining under a water body, grouting filling and the like are overcome; the added straw powder has better water storage property, so that the material has better water storage property. By adjusting the proportion, the strength, the water storage capacity and the permeability of the material can be adjusted within a certain range so as to simulate rock strata with different properties. Therefore, the material prepared by the method can simulate the water storage and water permeability of various rock masses, is not disintegrated, and is suitable for researching various fluid-solid coupling problems in mining engineering.
Therefore, the material is of an integral and not compact structure, a plurality of pores exist naturally, meanwhile, the water absorption capacity of the material can be greatly accelerated due to the strong adsorption of the straw powder, so that water is conducted from the outside to the inside, the inner pores of the material are filled with water after the material is completely soaked, and the pva is dissolved into larger, larger and longer pores after contacting with the water, so that the water absorption capacity of the material is accelerated again.
Drawings
FIG. 1 is a schematic diagram showing the steps for preparing a fluid-solid coupling simulation material for reproducing fractures according to the present invention;
FIG. 2 is a graph showing the disintegration experiment of the fluid-solid coupling simulation material with reproduced cracks.
FIG. 3 is a comparison graph of the water storage rate of the fluid-solid coupling simulation-like material for reproducing fractures according to the present invention;
FIG. 4 is a comparison graph of water absorption of a fluid-solid coupling simulation-like material for reproducing fractures according to the present invention;
FIG. 5 is a general graph of water absorption versus time for a fluid-solid coupling simulation material of a reproduced fracture according to the present invention;
FIG. 6 is a comparison graph of water absorption and time of a hard rock group of a fluid-solid coupling simulation material for reproducing fractures according to the invention;
FIG. 7 is a comparison graph of water absorption rate and time of a rock set of fluid-solid coupling simulation material for reproducing fractures according to the invention
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
as shown in figure 1, the simulation material for simulating fluid-solid coupling of the reproduced fracture comprises the following components in percentage by mass: 70-80% of river sand, 10-15% of talcum powder, 3-5% of hydraulic oil, 2-8% of paraffin, 1-3% of biological cellulose powder and 2% of polyvinyl alcohol pva soluble material. The molding hardness of the fluid-solid coupling simulation material for reproducing the fracture is in direct proportion to the mass ratio of the added paraffin, and the material has higher hardness when the paraffin content is higher.
The judgment standard for whether the simulation material meets the experimental requirements is mainly compressive strength and water absorption, different compressive strengths represent different rock stratums, the water absorption can be adjusted according to actual requirements when the water absorption is required to absorb all water in the simulation grouting process regardless of the compressive strength. Three representative simulated rock stratum proportions are provided, and the corresponding compressive strength meets the simulation experiment standard.
A preparation method of a fluid-solid coupling analog simulation material for reproducing fractures comprises the following steps:
a. mixing river sand, paraffin, talcum powder, hydraulic oil, biological cellulose powder and pva soluble material according to the mass ratio;
b. preparing a pva soluble material into a crack body with the diameter of 0.1mm and the length of 2-5 cm;
c. putting the river sand into an electric heating pot for heating and continuously stirring for 3 minutes, adding talcum powder after the river sand is heated, continuously keeping the temperature and continuously stirring uniformly, wherein the stirring time is about 1 to 3 minutes;
d. after the river sand and the talcum powder are uniformly stirred, adding paraffin into the electric food warmer until the paraffin is melted, continuously keeping the temperature to uniformly stir all the materials for about 3 minutes, then adding hydraulic oil into the electric food warmer, and continuously stirring for 1 minute;
e. after the materials are uniformly stirred, simultaneously adding the straw powder and the pva soluble materials into an electric kettle, and then keeping the temperature to continue stirring for 1-3 minutes;
f. e, filling the uniformly stirred material obtained in the step e into a model container or a mold as required, tamping and paving the material in the process, standing the material for 24 hours, and solidifying and forming the material to obtain a simulated material containing pva;
g. soaking the simulated material containing pva in water for 24-48 hours to ensure that the prefabricated pva soluble material is fully contacted with the water and completely melted, thereby forming micro cavities with different shapes in the simulated material to simulate the middle cracks of the rock body;
h. and obtaining the fluid-solid coupling similar simulation material for reproducing the fracture after the simulation material is dried.
The total volume of all the materials added into the electric heating pot is smaller than the volume 1/2, and the temperature of each material heated in the electric heating pot is 80-100 ℃.
The river sand is round grains and the like, is used as aggregate, and the strength of the river sand is adjusted within the range of 40-70 meshes;
the talcum powder is used as a regulator, and the mesh range is 325-800 meshes;
the hydraulic oil is antiwear hydraulic oil and is a regulator;
the paraffin is granular solid paraffin serving as a cementing agent, and the industrial grade is within the range of 52# to 58 #;
the biological fiber powder has water absorption property and normal temperature stability, is specifically powdery straw powder, sawdust and corn stalk powder, is used as a water storage and guiding agent, and has a particle size smaller than 1 mm;
the pva soluble material is used as a simulated crack body, is cylindrical, is generated by 3D printing, has a diameter of 0.01-1 mm, is cut into tiny line segments when in use, and is determined according to the thickness of the simulated material, preferably 1/5 of the thickness of the simulated material.
The first embodiment,
The disintegration experiment is utilized to reproduce the water property test of the fluid-solid coupling analog simulation material of the fracture:
the disintegration experiment is a process for verifying that the test piece can not disintegrate when being soaked in water, the experiment raw material is a test piece block body subjected to a strength test, and the control group is a traditional material test piece.
The experimental steps are as follows: and taking a plurality of test pieces, putting the test pieces into water, observing and comparing the test pieces.
The experimental results are as follows: the test piece prepared from paraffin has good non-hydrophilicity, and the similar simulation material has stable property in water, has no slag falling phenomenon and decomposition phenomenon, can be disintegrated and muddy when being soaked in water compared with the traditional similar material, and is shown in a disintegration experiment shown in figure 2.
Saturated water absorption experiment:
the aim of the saturated water absorption experiment is to obtain the water storage rate of the material in a saturated state, the water storage rate is used for determining the total amount of the material by contrasting the water bleeding amount absorption range of slurry, the water storage rate is mainly determined by the straw powder, the experimental scheme is mainly characterized by contrasting the water storage capacity before and after the straw powder is added, so the soft rock ratio is used, the experiment has two groups, one group is three, the two groups are respectively a straw powder adding group and a straw powder free group, and in addition, the change of the water storage rate can be controlled according to the adjustment of the straw powder.
(1) Experimental procedure
Two groups of 3 standard test pieces are prepared, wherein the number of the straw-free end group is 1, and the number of the straw end group is 2. Weighing after the preparation is finished, completely soaking for 72 hours into water, and taking out after 72 hours.
(2) Conclusion of the experiment
The following data were obtained experimentally:
TABLE 2 Water absorption quality control Table
| Numbering | Mass/g before immersion | Mass/g after immersion | Weight gain mass/g | Water storage rate/%) |
| 1-1 | 345.5 | 365.3 | 19.8 | 5.73 |
| 1-2 | 354.9 | 373.9 | 19 | 5.35 |
| 1-3 | 356.5 | 375.7 | 19.2 | 5.39 |
| 2-1 | 320 | 350 | 30 | 9.38 |
| 2-2 | 320.6 | 352.6 | 32 | 9.98 |
| 2-3 | 314.6 | 345.8 | 31.2 | 9.92 |
The following conclusions were reached:
the number of the two groups of test pieces is six, the number in the group is from 1 to 3, the number between the groups is from the front, wherein the number of the non-straw end group is 1, the number of the non-straw end group is 2, as can be seen from the above table, the water storage rate of the material with the straw end is twice of the saturated water storage rate of the non-straw end, the average water storage rate with the straw end is 9.7%, the average water storage rate with the non-straw end group is 5.4%, the straw end accounts for 2% of the total mass, the water storage mass is increased by 5%, the experiment effect is remarkable, and the water storage rate requirement in combination with the experiment is considered to be satisfied, as shown in fig.
Equal interval water absorption rate experiment
The equal interval water absorption rate experiment is that the water absorption rate experiment is weighed once every 2 hours on the basis of saturated water absorption and lasts for 72 hours. The experiment is used for determining the water absorption curve of the material along with time, evaluating the water absorption capacity and the water absorption rate of the material, and simultaneously verifying the influence of different proportions on the water absorption rate.
(1) Experimental procedure
Test pieces were prepared separately as follows
TABLE 3 test piece preparation table
And weighing the serial numbers of the test pieces, sequentially putting the test pieces into water, then starting timing, weighing and recording every two hours, and summarizing data.
(2) Conclusion of the experiment
After 72 consecutive hours of experiments, the data were summarized and observed to conclude as follows:
the water storage rate is basically unrelated to the simulated lithology, the difference between the water storage rates of the simulated hard rock and the simulated soft rock is very small, the difference between the average water storage rates is within 1%, the average water storage rate is 3% and is similar to the real water storage rate of a rock stratum, the data at the moment is slightly different from the previous data, the experimental error caused by the fact that part of quality is lost by repeatedly taking a test piece and mistakenly touching slag in the experimental process is considered, but the proportion of the formula can be considered not to influence the water absorption rate of the material by summarizing the rule, and the formula is shown in figure 4.
The straw powder is a main factor for simulating water absorption of the material, the average water storage rate of hard rock and soft rock added with the straw powder reaches 10%, and the water absorption speed of the straw powder group is far higher than that of the straw-free end group in the whole experiment period.
The water absorption speed is very high within 3 hours after the water enters, the curve is remarkably slowed down within 3 hours, the outer layer absorbs water due to the pore effect within 3 hours and is saturated on the outer layer, but the non-hydrophilic substance of hydraulic oil in the material causes the water to be blocked when penetrating inwards, so that the penetration speed is delayed, at the moment, the internal hydraulic oil gradually seeps outwards, and an oil film begins to appear on the surface of the water-soaking basin. As shown in FIGS. 5 and 6, the water absorption speed begins to increase about 30 hours after water enters, the curve of the straw end group is particularly obvious, the hydraulic oil at the moment basically seeps out, the channel inside which is originally blocked by the hydraulic oil is gradually opened, and simultaneously the water absorption rate begins to be enhanced due to the water absorption effect of the straw end and reaches the maximum value in 64 hours.
The soft rock soaked in water has obvious plasticity characteristic after 30 hours, but still keeps certain integrity and has no disintegration phenomenon.
Penetration test
The permeability coefficients of the material without pva material and after pva material addition were compared to reflect the water permeability of the material. The results of the experiment show that the permeability coefficient measured without adding pva material is 2.72X 10-7cm/s, and a permeability coefficient K of 1.4X 10 measured after addition of 2% of pva material-4cm/s, namely the permeability coefficient is increased by 1000 times after the pva material is added, and the permeability speed of the material is obviously improved.
Claims (5)
1. A fluid-solid coupling analog simulation material for reproducing fractures is characterized by comprising the following components in parts by mass: 70-80% of river sand, 10-15% of talcum powder, 3-5% of hydraulic oil, 2-8% of paraffin, 1-3% of biological fiber powder and 2% of polyvinyl alcohol pva soluble material, and the molded simulation material is obtained after heating, stirring and cooling.
2. The fluid-solid coupling analog simulation material for reproducing the fissure of claim 1, wherein: the molding hardness of the fluid-solid coupling simulation material for reproducing the fracture is in direct proportion to the mass ratio of the added paraffin, and the material has higher hardness when the paraffin content is higher.
3. A method for preparing a fluid-solid coupling simulation-like material for reproducing a fracture as set forth in claim 1, characterized by the steps of:
a. mixing river sand, paraffin, talcum powder, hydraulic oil, biological cellulose powder and pva soluble material according to the mass ratio;
b. preparing a pva soluble material into a crack body with the diameter of 0.1mm and the length of 2-5 cm;
c. putting the river sand into an electric heating pot for heating and continuously stirring for 3 minutes, adding talcum powder after the river sand is heated, continuously keeping the temperature and continuously stirring uniformly, wherein the stirring time is about 1 to 3 minutes;
d. after the river sand and the talcum powder are uniformly stirred, adding paraffin into the electric food warmer until the paraffin is melted, continuously keeping the temperature to uniformly stir all the materials for about 3 minutes, then adding hydraulic oil into the electric food warmer, and continuously stirring for 1 minute;
e. uniformly stirring the materials, simultaneously adding straw powder and pva soluble materials into an electric kettle, and keeping the temperature to continuously stir for 1-3 minutes;
f. e, filling the uniformly stirred material obtained in the step e into a model container or a mold as required, tamping and paving the material in the process, standing the material for 24 hours, and solidifying and forming the material to obtain a simulated material containing pva;
g. soaking the simulated material containing pva in water for 24-48 hours to ensure that the prefabricated pva soluble material is fully contacted with the water and completely melted, thereby forming micro cavities with different shapes in the simulated material to simulate the middle cracks of the rock body;
h. and obtaining the fluid-solid coupling similar simulation material for reproducing the fracture after the simulation material is dried.
4. The method for preparing the fluid-solid coupling simulation-like material for reproducing the fissure of claim 1, wherein: the total volume of all the materials added into the electric heating pot is smaller than the volume of 1/2, and the temperature of each material heated in the electric heating pot is 80-100 ℃.
5. The method for preparing the fluid-solid coupling simulation-like material for reproducing the fissure of claim 1, wherein:
the river sand is round grains and the like, is used as aggregate, and the strength of the river sand is adjusted within the range of 40-70 meshes;
the talcum powder is used as a regulator, and the mesh range is 325-800 meshes;
the hydraulic oil is antiwear hydraulic oil and is a regulator;
the paraffin is granular solid paraffin serving as a cementing agent, and the industrial grade is within the range of 52# to 58 #;
the biological fiber powder has water absorption property and normal temperature stability, is specifically powdery straw powder, sawdust and corn stalk powder, is used as a water storage and guiding agent, and has a particle size smaller than 1 mm;
the pva soluble material is used as a simulated crack body, is cylindrical, is generated by 3D printing, has a diameter of 0.01-1 mm, is cut into tiny line segments when in use, and is determined according to the thickness of the simulated material, preferably 1/5 of the thickness of the simulated material.
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| CN101625354A (en) * | 2009-08-05 | 2010-01-13 | 山东大学 | Similar material for fluid-solid coupling model test |
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| CN109704707A (en) * | 2019-01-16 | 2019-05-03 | 山东理工大学 | A kind of artesian aquifer analog material of solid&liquid couple simulated experiment and preparation method thereof |
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| CN101625354A (en) * | 2009-08-05 | 2010-01-13 | 山东大学 | Similar material for fluid-solid coupling model test |
| CN104833555A (en) * | 2015-03-09 | 2015-08-12 | 绍兴文理学院 | Producing method of intermittent-filling fracture rock sample model |
| CN109704707A (en) * | 2019-01-16 | 2019-05-03 | 山东理工大学 | A kind of artesian aquifer analog material of solid&liquid couple simulated experiment and preparation method thereof |
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Application publication date: 20201211 |