A method for making a long-term storage suitable original rock core sample

Abstract

The application discloses a kind of original rock core sample production methods suitable for long-term preservation. Belong to geological exploration technical field. The production method includes the following steps: core drying, core shaping, empty position support, sample sealing and label production. Compared with prior art, the beneficial effects obtained by the application are: the application is a kind of original rock core sample production method suitable for long-term preservation, easy to operate, completely saves the original appearance of rock core, can significantly reduce the cost of rock core sample production and storage, effectively improves the durability, integrity and ornamental of rock core preservation.

Description

Technical Field

[0001] This invention relates to the field of geological exploration technology, and more specifically to a method for preparing undisturbed rock core specimens suitable for long-term preservation. Background Technology

[0002] Rock cores are cylindrical rock samples extracted from boreholes using ring core drilling or other core-taking tools. They are important physical geological data for studying and understanding underground geology and mineral resources. Rock cores can provide people with rich geological information most directly and play an important role in geological exploration, scientific research, and popular science.

[0003] For some particularly important geological exploration and scientific research projects, rock cores are often preserved for years, decades, or even longer. Before extraction, rock cores are in a triaxial stress state underground. After extraction, the stress, temperature, humidity, and other environmental conditions change, and the cores are easily weathered and fragmented by the influence of oxygen in the air. Therefore, proper preservation of rock cores has become a technical challenge. Currently, the method of rock core preservation is storage in core repositories. For cores that are particularly prone to weathering or volatilization, wax sealing is often used. Core repositories require specific environmental conditions such as constant temperature and humidity, resulting in high storage and maintenance costs and occupying a large amount of space. Furthermore, even after wax sealing, the water content and physical state of some stored cores still change over time, which can negatively impact future scientific research. Traditional wax sealing methods also suffer from low transparency, making direct observation of the core difficult, and have relatively low storage durability. Existing methods for preparing rock core specimens can only select representative rock cores, and the original texture of the rock cores cannot be avoided during the pretreatment, polishing, and cleaning processes.

[0004] In summary, how to provide a core preservation method that allows for long storage time, direct observation, and low cost is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a method for preparing undisturbed rock core specimens suitable for long-term preservation. The method of the present invention solves the technical problems of existing technologies, such as large footprint, high storage and maintenance costs, difficulty in direct observation, low storage durability, difficulty in preserving the entire core, and easy damage to the original texture of the rock core.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for preparing undisturbed rock core specimens suitable for long-term preservation includes the following steps:

[0008] (1) Core drying:

[0009] The rock core was placed in a PVC semi-cylindrical tube and dried together until the humidity was less than 12%.

[0010] This step can achieve the effect of dehydration and mold prevention;

[0011] (2) Core shaping:

[0012] The dried rock core, along with the PVC semi-cylindrical tube, is placed into the semi-cylindrical acrylic tube. The part of the rock core that extends beyond the acrylic tube is removed, and then it is shaped using setting glue.

[0013] (3) Support at the gap:

[0014] For the empty areas left after sampling, use acrylic sheets for support;

[0015] (4) Specimen sealing:

[0016] The top and bottom of the acrylic tube are sealed with acrylic sheets and adhesive, while one side of the rock core is sealed with glass sheets and adhesive.

[0017] (5) Label creation:

[0018] Attach the core depth label to the glass slide.

[0019] Furthermore, the PVC semi-cylindrical tube has a diameter of 100mm and a height of 1000mm.

[0020] Furthermore, the acrylic tube has a diameter of 110mm, a height of 1000mm, and a thickness of 5mm.

[0021] Furthermore, the specific operation of step (3) is as follows: take an acrylic support piece that matches the core cavity and place it in the cavity, and then set acrylic fixing piece 1 and acrylic fixing piece 2 at the top and bottom of the acrylic support piece respectively.

[0022] Furthermore, both the acrylic fixing piece 1 and the acrylic fixing piece 2 are semi-circular shapes that are adapted to the diameter of the rock core.

[0023] Furthermore, sampling marks can be set on the acrylic support sheet.

[0024] Furthermore, the sampling identifier indicates the sampling number, sampling depth, and lithological name.

[0025] Furthermore, the acrylic sheet in step (4) is a semi-circular acrylic sheet with a diameter of 120mm, and the glass sheet is a glass sheet with a length of 1000mm, a width of 120mm, and a thickness of 5mm.

[0026] Compared with the prior art, the present application has the advantages that the present application is a long-term storage suitable original rock core sample manufacturing method, which is easy to operate, can completely preserve the original appearance of the rock core, can significantly reduce the cost of rock core sample manufacturing and storage, and can effectively improve the durability, integrity and ornamental value of the rock core preservation. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the provided drawings.

[0028] Figure 1 The drawing is a front view of the rock core sample of the present application.

[0029] Figure 2 The drawing is a top view of the rock core sample of the present application.

[0030] Wherein: ①-rock core; ②-PVC semi-cylindrical tube; ③-acrylic tube; ④-shaping glue; ⑤-acrylic support sheet. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0032] The required reagents of the present application are conventional experimental reagents, which can be purchased from the market; and the experimental methods not mentioned are conventional experimental methods, which will not be described one by one here.

[0033] Embodiment 1

[0034] A long-term storage suitable original rock core sample manufacturing method, comprising:

[0035] Step 1: Rock core drying:

[0036] The rock core stored on the ordinary PVC semi-cylindrical tube (diameter 100 mm, height 1000 mm) is put into the rock core drying box together with the PVC semi-cylindrical tube as a whole, and is dried to a humidity of less than 12%, so as to achieve the effect of dehydration and mildew prevention.

[0037] Step 2: Rock core shaping:

[0038] Put the dried core into the semi-cylindrical acrylic tube (5mm thick, 110mm in diameter, 1000mm high) together with the PVC semi-cylindrical tube, remove the excess part of the core beyond the plane of the acrylic tube, and use setting glue to shape the core.

[0039] Step 3: Empty space support:

[0040] Place the acrylic support sheet in the empty space left after the soil test sampling, then place the acrylic fixing sheet 1 and the acrylic fixing sheet 2 on the top and bottom of the acrylic support sheet respectively to ensure the stability of the whole core.

[0041] Then paste the sampling label on the acrylic support sheet, indicating the sampling number, sampling depth, and lithology name.

[0042] Step 4: Specimen sealing:

[0043] Seal the top and bottom of the acrylic tube with semi-cylindrical acrylic sheets with a diameter of 120mm, and seal one side of the core with a glass sheet with a length of 1000mm, a width of 120mm, and a thickness of 5mm.

[0044] Step 5: Label making; paste the core depth label above the glass sheet.

[0045] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0046] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing undisturbed rock core specimens suitable for long-term preservation, characterized in that, Includes the following steps: (1) Core drying: The rock core was placed in a PVC semi-cylindrical tube and dried together until the humidity was less than 12%. (2) Core shaping: The dried rock core, along with the PVC semi-cylindrical tube, is placed into the semi-cylindrical acrylic tube. The part of the rock core that extends beyond the acrylic tube is removed, and then it is shaped using setting glue. (3) Vacancy support: For the empty areas left after sampling, use acrylic sheets for support; (4) Specimen sealing: The top and bottom of the acrylic tube are sealed with acrylic sheets and adhesive, while one side of the rock core is sealed with glass sheets and adhesive. (5) Label making: Attach core depth labels to the glass slide; The PVC semi-cylindrical tube has a diameter of 100mm and a height of 1000mm; The specific operation of step (3) is as follows: take an acrylic support piece that matches the core cavity and place it in the cavity, and then set acrylic fixing piece 1 and acrylic fixing piece 2 at the top and bottom of the acrylic support piece respectively. Both the acrylic fixing plate 1 and the acrylic fixing plate 2 are semi-circular shapes that are adapted to the diameter of the rock core.

2. The method for preparing undisturbed rock core specimens suitable for long-term preservation as described in claim 1, characterized in that, The acrylic tube has a diameter of 110mm, a height of 1000mm, and a thickness of 5mm.

3. The method for preparing undisturbed rock core specimens suitable for long-term preservation as described in claim 1, characterized in that, Sampling marks can be set on the acrylic support sheet.

4. The method for preparing undisturbed rock core specimens suitable for long-term preservation as described in claim 1, characterized in that, The acrylic sheet in step (4) is a semi-circular acrylic sheet with a diameter of 120mm, and the glass sheet is a glass sheet with a length of 1000mm, a width of 120mm, and a thickness of 5mm.

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