CN111562166B - Shale physical model sample considering bedding microstructure, preparation method and preparation device - Google Patents
Shale physical model sample considering bedding microstructure, preparation method and preparation device Download PDFInfo
- Publication number
- CN111562166B CN111562166B CN202010672063.7A CN202010672063A CN111562166B CN 111562166 B CN111562166 B CN 111562166B CN 202010672063 A CN202010672063 A CN 202010672063A CN 111562166 B CN111562166 B CN 111562166B
- Authority
- CN
- China
- Prior art keywords
- sample
- filling layer
- melting
- mold
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a shale physical model sample considering a laminated microstructure, a preparation method and a preparation device thereof, wherein the preparation method of the shale physical model sample comprises the following steps of plating a low-melting-point coating film outside a filling layer clapboard; inserting a plurality of filling layer partition plates plated with coating films into a sample mold in parallel; pouring a prepared filling layer similar material in a sample mold and condensing to obtain a sample initial framework; heating the initial framework of the sample, and pulling out the filling layer partition plate from the initial framework of the sample after melting the low-melting-point coating film; and after removing the melted low-melting-point coating film in the initial skeleton of the sample, filling the prepared thin-layer similar material at the position of the original filling layer partition plate in the initial skeleton of the sample, and performing condensation curing to obtain the shale model sample. The shale physical model sample containing the laminated microstructure can be successfully prepared by the preparation method.
Description
Technical Field
The invention belongs to the technical field of rock and soil experimental simulation, and particularly relates to a shale physical model sample considering a bedding microstructure, a preparation method and a preparation device.
Background
Similar materials have been widely used in the technical field of geotechnical experiment simulation for a long time. For the original rock with high sampling difficulty, by means of preparing similar materials, researchers can deeply understand the mechanical phenomena, stress distribution rules, failure mechanisms and other physical and mechanical characteristics of geotechnical engineering.
In recent years, along with the significant breakthrough of shale gas exploration and development in Fuling and other areas in China, unconventional energy sources such as shale gas have been gradually paid attention. In order to understand the physical and mechanical properties, the fracture failure mode and the fracture propagation rule of shale, researchers develop a lot of researches by means of physical experiments and the like. However, because shale samples obtained by deep drilling and coring are extremely precious, and physical experiments such as hydraulic fracturing and the like require a large amount of samples, the experiment research carried out by using the original rock is difficult to meet the research requirements. Therefore, the preparation of shale similar materials with the physical parameters close to those of the original rock for simulation test is an effective way to solve the problems.
The prior sample preparation method for shale similar materials is mainly carried out by a sample preparation method for common rock material similar materials. Through the regulation and control of the proportions of the cementing material, the aggregate, the water and the treating agent, similar materials with the same property are prepared to approximately simulate the physical and mechanical parameters of the shale, or the existence of a structural surface in the original rock is simulated only by considering the mode of prefabricating a single fracture. However, the most obvious bedding structure characteristics of shale and material anisotropy caused by bedding arrays are largely ignored in the preparation of the existing shale similar materials, so that the prepared materials have great difference from the original rock in various physical and mechanical properties, and the requirements of experimental research are difficult to meet.
In the existing simulation of shale bedding, such as CN110658037A, only a bedding structure can be simulated macroscopically, but each fine layer of the shale bedding structure is difficult to simulate; the laminar microstructure of the shale is continuously represented by alternately superposed fine layers and filling layers, and the filling and cementing states of the fine layers and the filling layers are determinants which finally influence the anisotropic characteristics of the shale; however, since the thickness of the fine and filling layers is usually very small, often less than 1mm, and several millimeters to several centimeters at the maximum, it is impossible to prepare them by a preparation method such as that in CN 110658037A. Therefore, in order to truly simulate the characteristics of the shale bedding microstructure and the physical and mechanical anisotropy thereof, research and development of shale similar material (physical model sample) sample preparation equipment and a sample preparation method considering the bedding microstructure are urgently needed.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of the present invention is to provide a shale physical model sample considering a laminar microstructure, a preparation method and a preparation apparatus thereof, which can prepare the shale physical model sample containing the laminar microstructure.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the preparation method of the shale physical model sample considering the laminated microstructure comprises the following steps:
step one, plating a low-melting-point coating film outside the filling layer partition plate;
secondly, inserting a plurality of filling layer partition plates plated with coating films into the sample mold in parallel;
pouring the prepared filling layer similar material in the sample mold and condensing to obtain a sample initial framework;
step four, heating the initial framework of the sample, and pulling out the filling layer partition plate from the initial framework of the sample after melting the low-melting-point coating film;
and step five, after removing the low-melting-point coating film melted in the initial skeleton of the sample, filling the prepared thin-layer similar material at the position of the original filling layer partition plate in the initial skeleton of the sample, and performing condensation curing to obtain the shale material model sample.
Specifically, the specific process from the third step to the fifth step is as follows:
pouring a prepared filling layer similar material in the sample mold, and obtaining the initial framework of the sample after tapping and initial setting;
heating the sample mold, and pulling out the filling layer partition plate from the top of the sample mold after melting the low-melting-point coating film;
and after removing the low-melting-point coating film melted in the sample mold, filling the prepared thin-layer similar material at the position of the original filling layer partition plate in the sample mold, compacting and initially setting, and then removing the mold and maintaining to obtain the shale model sample.
Specifically, after the plurality of filling layer partition plates are clamped and fixed through the clamp, the sample mold is integrally inserted or pulled out through the lifting mechanism.
Specifically, the preparation process of the low-melting-point coating film is as follows:
putting a low-melting-point coating material into a sample die;
heating the sample die to melt the low-melting-point coating material;
integrally inserting a plurality of filling layer partition plates into the sample mold by using a lifting mechanism to carry out film coating;
after the film coating is carried out for a set time, a plurality of filling layer partition plates are driven by a lifting mechanism to be integrally pulled out from a sample mold and cooled, and the low-melting-point film coating is obtained;
wherein the melting point of the low-melting-point coating film is less than or equal to 50 ℃.
Specifically, heating elements are arranged on the side part and the bottom part of the sample mold, and during heating, the heating temperature of the heating element at the bottom part of the sample mold is higher than that of the heating element at the side part of the sample mold, so that the coating material on the initial skeleton of the sample is gradually softened from the bottom part to the top part.
Specifically, the bottom of the filling layer partition plate is in contact with the die cavity of the sample die after the filling layer partition plate is inserted into the sample die, a set gap exists between the two sides of the filling layer partition plate and the die cavity, and the filling layer partition plate is vertically inserted into the sample die.
Specifically, the filling layer similar material in the initial skeleton of the sample is washed and dried by low-temperature water mist to remove the molten low-melting-point coating material.
Specifically, the low-melting-point coating film is a paraffin film.
Specifically, the filling layer similar material adopts a mixture of shale powder, quartz sand, gypsum, cement and water; the fine layer of similar material is a mixture of quartz sand, gypsum and water.
The shale physical model sample with the laminated microstructure considered is prepared by the preparation method.
The shale physical model sample preparation device considering the laminated microstructure comprises a sample mold, wherein a plurality of parallel filling layer partition plates arranged at intervals are inserted into the sample mold, the filling layer partition plates are configured to be drawn out of the sample mold, a layer of low-melting-point coating film is arranged on the outer surface of each filling layer partition plate, and heating elements are arranged at the bottom and the side of the sample mold.
Specifically, the low-melting-point coating film is paraffin.
Specifically, a lifting mechanism for driving the filling layer partition plates to move up and down is arranged on a die holder of the sample die, and a clamp for clamping each filling layer partition plate is arranged at the bottom of the lifting mechanism.
Specifically, anchor clamps include two piece at least connecting rods of parallel arrangement, are equipped with the through-hole that supplies the connecting rod to wear to establish on the top of filling layer baffle, and the filling layer baffle hangs to be fixed on the connecting rod, and the both ends of connecting rod are equipped with lock nut, are equipped with the spacer between two adjacent filling layer baffles.
Specifically, the die holder is also provided with a cooling fan facing the filling layer partition plate.
Compared with the prior art, the invention has the following beneficial effects:
the shale physical model sample considering the bedding microstructure is obtained by attaching a coating made of a low-melting-point coating material on the filling layer partition, heating and melting the coating on the initial skeleton of the sample after primary pouring so as to form a drawing gap, so that the filling layer partition can be smoothly drawn out of the initial skeleton of the sample without damaging the structure of the filling layer in the shale layer of the initial skeleton of the sample, and casting a fine-layer similar material at the position of the initial skeleton of the sample, which is positioned on the filling layer partition, after drawing, so that the problem that the bedding microstructure is difficult to prepare is well solved, the formed bedding microstructure can be really matched with the bedding surface state in the original rock, and the physical and mechanical properties of the shale caused by the characteristics of the bedding microstructure can be smoothly simulated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is an isometric view of an apparatus for preparing a shale object model specimen in an embodiment of the invention;
FIG. 2 is a schematic diagram of an assembly structure of a spacer with a filling layer according to an embodiment of the present invention;
FIG. 3 is a schematic representation of a shale model sample prepared in an embodiment of the present invention;
wherein: 1-a sample mold; 2-a filling layer separator; 3-a heating element; 4-die holder; 5-a lifting mechanism; 6-clamping; 7-a cooling fan; a-a fine layer; b-a filling layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, a method for preparing a shale model sample considering a laminated microstructure according to an embodiment of the present application includes the following steps:
step one, plating a low-melting-point coating film outside the filling layer partition plate 2;
secondly, inserting a plurality of filling layer partition plates 2 plated with coating films into the sample mold 1 in parallel;
pouring a prepared filling layer similar material in the sample mold 1 and condensing to obtain a sample initial framework;
step four, heating the initial framework of the sample, and pulling the filling layer partition plate 2 out of the initial framework of the sample after melting the low-melting-point coating film;
and step five, after removing the low-melting-point coating film melted in the initial skeleton of the sample, filling the prepared thin-layer similar material at the position of the original filling layer partition plate 2 in the initial skeleton of the sample, and performing condensation curing to obtain the shale material model sample.
In the embodiment of the application, the mixture of shale powder, quartz sand, gypsum, cement and water is adopted as the filling layer similar material, and the mixture of quartz sand, gypsum and water is adopted as the fine layer similar material. Of course, in actual operation, the filling layer similar material and the fine layer similar material may be adaptively adjusted according to specific components of the fine layer and the filling layer of the shale bedding in the actual shale to be simulated, and details are not repeated herein.
In the embodiment of the application, a coating made of a low-melting-point coating material is attached to the filling layer partition plate 2, after primary pouring, the initial skeleton of the sample is heated and melted to form a pattern drawing gap, so that the filling layer partition plate 2 can be smoothly drawn out of the initial skeleton of the sample without damaging the structure of the filling layer between shale layers in the initial skeleton of the sample, after pattern drawing, a fine-layer similar material is poured for the second time at the position, where the initial skeleton of the sample is located at the filling layer partition plate 2, of the filling layer partition plate to obtain the shale physical model sample considering the physical microstructure of the shale, the problem that the physical microstructure of the shale is difficult to prepare is well overcome, the formed physical microstructure of the shale can be really matched with the physical surface state in the original rock, and the physical mechanical anisotropy of the shale caused by the physical microstructure characteristics of the shale can be smoothly simulated.
It can be understood that, in practical application, the specific process of the step three to the step five is as follows: pouring the prepared filling layer similar material in the sample mold 1, tapping and initially setting to obtain a sample initial framework, heating the sample mold 1, melting the low-melting-point coating film, pulling the filling layer partition plate 2 out of the top of the sample mold 1, removing the molten low-melting-point coating film in the sample mold 1, filling the prepared fine layer similar material in the position of the original filling layer partition plate 2 in the sample mold 1, tapping and initially setting the fine layer similar material, and then removing the mold and maintaining to obtain the shale object mold sample.
In this application embodiment, the drawing of the filling layer partition plate 2 is directly performed in the sample mold 1 after the initial setting of the filling layer similar material, so that the preparation time for sample preparation can be saved, and the drawing of the filling layer partition plate 2 can be performed after the filling layer similar material is completely solidified.
Further, the inventors have studied and found that when a low-melting-point plating material having a melting point of 50 ℃ or lower is selected as the low-melting-point plating material, the initially solidified filling layer structure is not destroyed by heating when the low-melting-point plating film is melted by heating. The low-melting-point coating material can be paraffin and other materials, and the thickness of the coating film on the filling layer partition plates 2 and the distance between adjacent filling layer partition plates 2 correspond to the thickness of a fine layer and the thickness of a filling layer of shale in the actual shale respectively, and are generally controlled to be less than 1 cm.
It can be understood that when the plurality of filling layer partition plates 2 are clamped and fixed by the clamp 6 and integrally inserted into or pulled out of the sample mold 1 by the elevating mechanism 5, the sample preparation efficiency can be greatly improved.
In practical application, the preparation process of the low-melting-point coating film is as follows: and putting a low-melting-point coating material into the sample mold 1, heating the sample mold 1 to melt the low-melting-point coating material, integrally inserting the plurality of filling layer partition plates 2 into the sample mold 1 by using the lifting mechanism 5 to perform coating, and after the coating is set for time, integrally pulling out and cooling the plurality of filling layer partition plates 2 from the sample mold 1 by using the lifting mechanism 5 to obtain the low-melting-point coating.
In this application embodiment, four preparation links of 2 coating films of filling layer baffle, filling layer similar material are pour, 2 drawing dies of filling layer baffle and thin layer secondary are pour and are all gone on in being based on same sample mould 1, effectively reduce the repeatability drawing of patterns and the die filling operation of system appearance process, guarantee that the filling layer similar material of initial pouring prepares the layer reason structure process stable performance in the later stage to make the overall stability of material sample performance. Of course, the filling layer spacer 2 may be inserted into the sample mold 1 after the low melting point plating film is plated on the outside of the filling layer spacer 2 by an external device.
It should be explained that, in the practical design, the heating elements 3 are arranged at the side part and the bottom part of the sample mold 1, and during heating, the heating temperature of the heating element 3 at the bottom part of the sample mold 1 is higher than that of the heating element 3 at the side part of the sample mold 1, so that the coating material on the initial skeleton of the sample is gradually softened from the bottom part upwards, and by the ingenious arrangement, the coating material and the filling layer partition plate 2 can be effectively prevented from being heated and expanded to damage the filling layer structure formed by the initial setting.
Specifically, the bottom contacts with the die cavity of sample mould 1 behind the filling layer baffle 2 inserted sample mould 1, and there is the settlement clearance both sides and die cavity, and filling layer baffle 2 inserts perpendicularly in sample mould 1, and behind the 2 draft of filling layer baffle, the filling layer structure that the initial set formed is an overall structure, and is difficult for destroying.
Specifically, the filling layer similar material in the initial skeleton of the sample is washed and dried by low-temperature water mist to remove the molten low-melting-point coating material.
Referring to fig. 3, the present embodiment also provides a shale model sample with a considered lamellar microstructure prepared by the above preparation method, wherein the lamellar structure of the shale model sample is composed of a fine layer a and a filling layer B which are alternately stacked.
Referring to fig. 1 to 3, the present embodiment further provides a shale model sample preparation apparatus considering a laminated microstructure, including a sample mold 1, a plurality of parallel and spaced filling layer partition plates 2 inserted into the sample mold 1, the filling layer partition plates 2 configured to be drawn out from the sample mold 1, the outer surface of the filling layer partition plates 2 being provided with a layer of low-melting-point coating, and the bottom and side portions of the sample mold 1 being provided with heating elements 3.
Specifically, a lifting mechanism 5 for driving the filling layer partition plates 2 to move up and down is arranged on a die holder 4 of the sample die 1, and a clamp 6 for clamping each filling layer partition plate 2 is arranged at the bottom of the lifting mechanism 5; a vibrator (not shown) is provided between the sample mold 1 and the mold base 4,
wherein, the lifting mechanism 5 can adopt a cylinder, a cylinder or a screw rod and other lifting mechanisms 5. And anchor clamps 6 are then including two piece at least connecting rods 601 of parallel arrangement on 5 bottom bases of elevating system, are equipped with the through-hole that supplies connecting rod 601 to wear to establish on the top of filling layer baffle 2, and filling layer baffle 2 hangs to be fixed on connecting rod 601, and the both ends of connecting rod 601 are equipped with lock nut 602, are equipped with spacer 603 between two adjacent filling layer baffles 2. The packing layer partition 2 is hung on the connecting rod 601 and is locked by locking nuts 602 at both ends. In addition, the thicknesses of the fine layer and the filling layer in the prepared shale model sample can be flexibly adjusted by adjusting the thicknesses of the isolation gasket 603 and the filling layer partition plate 2, and in addition, the adjustment of the bedding angle from 0 degree to 90 degrees can be realized by changing the installation angle of the filling layer partition plate 2 in the sample mold 1.
In addition, the die holder 4 is also provided with a cooling fan 7 facing the filling layer partition plate 2, when the filling layer partition plate 2 plated with the coating film is drawn out from the sample die 1, the coating film can be rapidly cooled through the cooling fan 7, and the die cavity of the sample die 1 can be set to be square.
The following takes a cubic shale model sample with a bedding angle of 0 degree, a fine layer thickness of 3mm, a filling layer thickness of 1mm and a side length of 100 mm as an example, and specifically explains a specific preparation process of the shale model sample considering a bedding microstructure, and comprises the following steps:
step one, assembling a mold:
firstly, two L-shaped detachable side plates are connected in an encircling manner, and a detachable bottom plate is connected to the bottom of the L-shaped detachable side plates to form a sample mold 1 with an opening on the top surface, wherein the inner size of the sample mold 1 is 100 mm multiplied by 100 mm; and the heating elements 3 are arranged at the side part and the bottom part of the periphery of the mould; then, fixing the sample die 1 on the die holder 4 through a die fastener;
selecting a filling layer clapboard 2 and an isolation gasket 603 according to the shale bedding angle, the thickness of the fine layer and the thickness of the filling layer to be simulated, setting the size of the filling layer clapboard 2 to be about 110 mm multiplied by 90 mm multiplied by 1mm, setting the size of the isolation gasket 603 to be about 10 mm multiplied by 40 mm multiplied by 3mm, assembling the filling layer clapboard 2 by utilizing a locking nut 602 and a connecting rod 601, and fixing the assembled filling layer clapboard 2 on a lifting mechanism 5.
Step two, coating a filling layer separator 2:
putting 40 ℃ low-melting-point coating material into the sample mold 1, setting the heating elements 3 at the side and the bottom of the sample mold 1 to be at a uniform temperature of 65 ℃, and uniformly heating the coating material until the coating material is melted to a stable temperature; then, the lifting mechanism 5 drives the filling layer partition plate 2 to move downwards along the vertical direction, and the filling layer partition plate is inserted into the liquid coating material in the sample mold 1, so that the solution is immersed to the position of 100 mm of the height of the filling layer partition plate 2; after the film is coated for the set time of 3S, the lifting mechanism 5 moves upwards, the filling layer partition plate 2 is drawn out of the sample mold 1, and the cooling fan 7 is started to rapidly cool the coated filling layer partition plate 2 so as to solidify and harden the coated film; finally, the coating material dissolved in the sample mold 1 is sucked away, and the heating element 3 stops heating.
Thirdly, pouring similar materials of the filling layer:
the lifting mechanism 5 drives the filling layer partition plate 2 after film coating to be placed into the sample mold 1, the prepared filling layer similar material (containing shale powder, quartz sand, gypsum, cement and water) is poured into the sample mold 1, a vibrator below the mold base 4 is synchronously started to vibrate for a period of time (2 min), and pouring of the filling layer similar material is completed.
Fourthly, drawing the filling layer separator 2:
after the filling layer similar material is initially solidified for 48 hours, opening the heating elements 3 at the side part and the bottom part of the sample mold 1 again, setting the heating temperature of each heating element 3 to be higher than the melting point of the coating material, setting the heating temperature (45 ℃) of the heating element 3 at the bottom part to be higher than the heating temperature (42 ℃) of the heating element 3 at the side part, heating the sample mold 1, and gradually softening the coating material on the filling layer partition plate 2 from the bottom part to the top part; after the temperature is kept for a period of time (10 min), the filling layer partition plate 2 is slowly lifted out of the initial skeleton of the sample by the lifting mechanism 5; flushing and absorbing liquid on the initial skeleton of the sample by using low-temperature water mist to completely remove residual coating materials on the surface of the prefabricated layer; finally, the heating element 3 stops heating and returns the sample mold 1 and the sample original skeleton inside to room temperature.
Fifthly, secondary pouring:
pouring the prepared similar material (containing quartz sand, gypsum and water) of the thin layer into the sample mold 1, and synchronously starting a vibrator below the mold base 4 to vibrate for a period of time (3 min) so as to fill the similar material of the thin layer into the initial framework of the sample.
Sixthly, demolding and maintaining:
after the thin layer of similar material is initially solidified, the sample mould 1 is detached from the mould seat 4, and the sample mould 1 is detached; and then, maintaining the sample, and polishing the top surface of the sample by using an end surface polishing machine after the maintenance is finished to finish sample preparation.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (12)
1. The preparation method of the shale physical model sample considering the laminated microstructure is characterized by comprising the following steps of:
step one, plating a low-melting-point coating film outside the filling layer partition plate (2);
secondly, inserting a plurality of filling layer partition plates (2) plated with coating films into the sample mold (1) in parallel;
pouring a prepared filling layer similar material in the sample mold (1) and condensing to obtain a sample initial framework;
step four, heating the sample initial framework, and pulling the filling layer partition plate (2) out of the sample initial framework after melting the low-melting-point coating film;
step five, after removing the melted low-melting-point coating film in the initial skeleton of the sample, filling the prepared thin-layer similar material at the position of the original filling layer partition plate (2) in the initial skeleton of the sample, and performing condensation curing to obtain a shale model sample;
heating elements (3) are arranged on the side part and the bottom part of the sample mold (1), and during heating, the heating temperature of the heating element (3) on the bottom part of the sample mold (1) is higher than that of the heating element (3) on the side part of the sample mold (1), so that a coating film on an initial skeleton of the sample is gradually softened from the bottom part to the top part.
2. The method of claim 1, wherein: the concrete process from the third step to the fifth step is as follows:
pouring a prepared filling layer similar material in the sample mold (1), compacting and initially setting to obtain a sample initial framework;
heating the sample mold (1), and after melting the low-melting-point coating film, pulling out the filling layer partition plate (2) from the top of the sample mold (1);
after removing the low-melting-point coating film melted in the sample mold (1), filling the prepared thin-layer similar material at the position of the original filling layer partition plate (2) in the sample mold (1), compacting and initially solidifying, and then removing the mold and maintaining to obtain a shale object mold sample;
wherein the melting point of the low-melting-point coating film is less than or equal to 50 ℃.
3. The method of claim 2, wherein: and after the filling layer partition plates (2) are clamped and fixed by a clamp (6), the sample mold (1) is integrally inserted or pulled out by a lifting mechanism (5).
4. The production method according to claim 3, characterized in that: the preparation process of the low-melting-point coating film is as follows:
putting a low-melting-point coating material into the sample mold (1);
heating the sample die (1) to melt the low-melting-point coating material;
integrally inserting a plurality of filling layer partition plates (2) into the sample mold (1) by using the lifting mechanism (5) for film coating;
after the coating is carried out for a set time, the lifting mechanism (5) is utilized to drive the plurality of filling layer partition plates (2) to be integrally pulled out from the sample mold (1) and cooled, and then the low-melting-point coating is obtained.
5. The production method according to any one of claims 1 to 4, characterized in that: and the filling layer partition plate (2) is vertically inserted into the sample mold (1), the bottom of the filling layer partition plate is in contact with the mold cavity of the sample mold (1), and set gaps exist between the two sides of the filling layer partition plate and the mold cavity.
6. The production method according to any one of claims 1 to 4, characterized in that: and flushing and drying the similar material of the filling layer in the initial skeleton of the sample by using low-temperature water mist to remove the molten low-melting-point coating material.
7. The production method according to any one of claims 1 to 4, characterized in that: the low-melting-point coating film is a paraffin film.
8. Shale phantom sample taking into account a laminated microstructure, characterized in that it has been produced by a method of preparation according to any one of claims 1 to 7.
9. Shale physical model sample preparation device considering a laminated microstructure, comprising a sample mold (1), wherein a plurality of parallel filling layer partition plates (2) arranged at intervals are inserted into the sample mold (1), and the filling layer partition plates (2) are configured to be extracted from the sample mold (1), and the shale physical model sample preparation device is characterized in that: the outer surface of the filling layer partition plate (2) is provided with a layer of low-melting-point coating film, and the bottom and the side of the sample mold (1) are provided with heating elements (3);
the preparation process of the shale sample comprises the following steps: pouring a prepared filling layer similar material in the sample mold (1) and condensing to obtain a sample initial framework;
heating the initial sample framework, melting the low-melting-point coating film, and then pulling out the filling layer partition plate (2) from the initial sample framework;
after the melted low-melting-point coating film in the initial sample framework is removed, filling the prepared thin-layer similar material at the position of the original filling layer partition plate (2) in the initial sample framework, and performing condensation curing to obtain a shale object model sample;
when heating, the heating temperature of the heating element (3) at the bottom of the sample mold (1) is higher than that of the heating element (3) at the side of the sample mold (1), so that the coating film on the initial skeleton of the sample is gradually softened from the bottom to the top.
10. The shale physical model sample preparation device of claim 9, wherein: the low-melting-point coating is paraffin.
11. The shale model sample preparation apparatus of claim 9 or 10, wherein: the device is characterized in that a lifting mechanism (5) which drives the filling layer partition plate (2) to move up and down is arranged on a die holder (4) of the sample die (1), a clamp (6) which is used for clamping each filling layer partition plate (2) is arranged at the bottom of the lifting mechanism (5), and a vibrator is arranged between the sample die (1) and the die holder (4).
12. The shale physical model sample preparation device of claim 11, wherein: anchor clamps (6) are including two piece at least connecting rods of parallel arrangement, the top of filling layer baffle (2) is equipped with the confession the through-hole that the connecting rod wore to establish, filling layer baffle (2) hang to be fixed on the connecting rod, the both ends of connecting rod are equipped with lock nut, two adjacent be equipped with the spacer between filling layer baffle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010672063.7A CN111562166B (en) | 2020-07-14 | 2020-07-14 | Shale physical model sample considering bedding microstructure, preparation method and preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010672063.7A CN111562166B (en) | 2020-07-14 | 2020-07-14 | Shale physical model sample considering bedding microstructure, preparation method and preparation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111562166A CN111562166A (en) | 2020-08-21 |
| CN111562166B true CN111562166B (en) | 2020-10-02 |
Family
ID=72075419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010672063.7A Active CN111562166B (en) | 2020-07-14 | 2020-07-14 | Shale physical model sample considering bedding microstructure, preparation method and preparation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111562166B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916627B (en) * | 2021-09-30 | 2022-12-27 | 中南大学 | Device and method for preparing simulated rock sample containing complex-form weak layer |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060037267A1 (en) * | 2004-08-05 | 2006-02-23 | Taylor Charles D Jr | Simulated granite |
| CN102350724B (en) * | 2011-07-06 | 2013-09-25 | 张逸群 | Manufacturing method of artificial core with crevices for simulated leaking stoppage experiment |
| CN103645080A (en) * | 2013-12-09 | 2014-03-19 | 中国人民解放军63983部队 | Mold for preparing coaxial transmission and emission method test sample and method for preparing coaxial transmission and emission method test sample |
| CN204422304U (en) * | 2015-02-25 | 2015-06-24 | 中国矿业大学 | A kind of mould making the compound rock stratum test specimen of different angle and spacing |
| CN105628463B (en) * | 2015-03-09 | 2018-08-17 | 绍兴文理学院 | The sampling die of crack rock model sample |
| CN107443660A (en) * | 2017-08-11 | 2017-12-08 | 西安奥若特材料技术有限公司 | A kind of thermoplastic abnormal shape pipeline forming method |
| CN107300493B (en) * | 2017-08-23 | 2020-06-09 | 青岛理工大学 | Manufacturing die and manufacturing method for pore rock sample |
| CN208084814U (en) * | 2018-02-28 | 2018-11-13 | 东泰精密塑胶科技(深圳)有限公司 | A kind of mold with elevating function |
| CN109883789B (en) * | 2019-03-22 | 2021-06-01 | 中国矿业大学 | Method for manufacturing physical model of random micro-fractured rock mass |
| CN110057635B (en) * | 2019-04-11 | 2020-09-29 | 中国石油大学(北京) | Layered pouring type laminar shale target and manufacturing method thereof |
| CN110082176B (en) * | 2019-04-11 | 2020-08-11 | 中国石油大学(北京) | Manufacturing method of pre-inserting plate type laminar shale target and laminar shale target |
| CN110987569A (en) * | 2019-12-27 | 2020-04-10 | 长安大学 | Beam test piece forming device and method for asphalt mixture |
-
2020
- 2020-07-14 CN CN202010672063.7A patent/CN111562166B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111562166A (en) | 2020-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111562166B (en) | Shale physical model sample considering bedding microstructure, preparation method and preparation device | |
| CN210308385U (en) | Automatic pouring device for cement precast block | |
| CN110057636B (en) | Mould for manufacturing rock sample with anchor rod and crack and manufacturing method of rock sample | |
| CN109342163B (en) | Mould for making structural surface model containing weak interlayer | |
| CN110666958A (en) | Floor prefabricated part production process | |
| CN106501054A (en) | A kind of mould for preparing artificial side's rock core and the preparation method of square rock core | |
| CN113006481A (en) | Magnetic suction type pouring template and pouring wall | |
| CN112476730A (en) | Pouring mold and pouring process for lightweight aggregate concrete PC (polycarbonate) member | |
| CN111411734A (en) | Prefabricated sandwich heat-insulation bay window shear wall plate and manufacturing method thereof | |
| RU2094222C1 (en) | Method for producing articles with protrusions | |
| CN208992875U (en) | A kind of Vertical Combination die assembly | |
| CN216082238U (en) | Experimental device for making composite stratum analog simulation model | |
| CN212478264U (en) | Shear wall board for prefabricated sandwich thermal insulation bay window | |
| CN108908664A (en) | A kind of Vertical Combination die assembly | |
| CN209927559U (en) | Mould for manufacturing fractured rock sample with anchor rod | |
| CN107966345A (en) | The making mould of three-dimensional fracture strata model sample | |
| CN114434592B (en) | Rotary kiln prefabricated part forming device and method | |
| CN207964398U (en) | The making mold of three-dimensional fracture strata model sample | |
| WO2001090028A1 (en) | Moulding of ceramic moulding forms | |
| CN219837943U (en) | Novel porous brick suppression device | |
| CN110682407A (en) | Concrete prefabricated part production mold and concrete prefabricated part production method | |
| CN220920849U (en) | Casting molding device for spheroidized steel plate | |
| CN220247604U (en) | Combined cavity inner die | |
| JP2825709B2 (en) | Method of manufacturing concrete secondary products with exterior materials | |
| CN220113562U (en) | Sandwich insulating brick multi-mode forming die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |