Base for radioactive tailing stacking and preparation method thereof

Abstract

The invention relates to the field of tailing disposal, in particular to a base for radioactive tailing stacking. The frame is filled with the cement base body, and seepage grooves are formed in the upper surface of the cement base body; the transverse pipeline is horizontally buried in the cement base body, and at least one end of the transverse pipeline exceeds the frame; a plurality of vertical pipelines are connected to each transverse pipeline, so that a drainage channel is formed; the upper ports of the vertical pipelines are all located in the seepage tank, and the upper ports are flush with the lowest position of the seepage tank; the cement matrix is prepared from a precipitation mother solution, cement, an additive and ore leaching residues. The special stacking base is provided for the tailing stacking body and used for bearing the solidified stacking body on the soil or the inclined ground, isolating nuclide from permeating into the bottom ground of the stacking body and guiding percolating fluid to flow out of the stacking body for treatment.

Description

Technical Field

[0001] The invention relates to the field of tailings disposal, and in particular to a base for radioactive tailings stacking and a preparation method thereof. Background Art

[0002] Radioactive tailings produced after surface leaching of uranium ores at home and abroad are generally piled up in tailings ponds. At the same time, the tailings produced by beneficiation of polymetallic ores containing radionuclides also need to be piled up in tailings ponds. At present, the tailings dam stacking method is generally adopted. The loose tailings are stacked layer by layer in the tailings pond, and the top and sides are covered with stones and laid flat. An effluent collection pool is set up at the tail of the tailings pond to collect the seepage liquid for treatment.

[0003] When tailings are piled, the weight of the pile is large and the muddy ground is difficult to bear; at the same time, the current radioactive tailings pile is only treated with simple anti-seepage treatment between the pile and the ground soil, and there is a risk of seepage liquid contaminating the soil, surface water or shallow water. Summary of the invention

[0004] The purpose of the present invention is to provide a radioactive tailings stacking base and a preparation method thereof to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A base for radioactive tailings stacking, comprising:

[0006] frame;

[0007] A cement matrix, wherein the cement matrix is ​​filled in the frame and a seepage groove is provided on the upper surface of the cement matrix;

[0008] A transverse pipeline, wherein the transverse pipeline is horizontally buried in the cement matrix, and at least one end of the transverse pipeline exceeds the frame;

[0009] A vertical pipe, each of the horizontal pipes is connected to a plurality of vertical pipes to form a drainage channel; the upper ports of the vertical pipes are all located in the seepage groove, and the upper ports are flush with the lowest point of the seepage groove;

[0010] The preparation method of the cement matrix comprises:

[0011] The precipitation mother liquor is exchanged through a calcium-type cationic saturated resin to obtain a calcium-rich mother liquor;

[0012] adding calcium oxide to the calcium-rich mother liquor to obtain an intermediate solution;

[0013] Adding potassium carbonate to the intermediate solution, stirring and mixing, allowing to stand, and filtering to obtain an activator;

[0014] The cement, additives, ore leaching residue and the activator are mixed and solidified into a shape.

[0015] Optionally, the surface of the cement matrix is ​​provided with anti-slip grooves.

[0016] Optionally, the vertical pipes in the frame are arranged in a matrix, the vertical pipes in each row are in the same straight line, and the seepage trough coincides with each row of vertical pipes.

[0017] Based on the same inventive concept, the present application also provides a method for preparing the above-mentioned radioactive tailings stacking base, comprising:

[0018] Weave the framework according to the terrain conditions of the stacking location;

[0019] Arrange the transverse pipes in the frame, and if the ground is inclined, make the axial direction of the transverse pipes consistent with the inclination direction, so that the lower end of the transverse pipes exceeds the frame;

[0020] Opening holes at preset intervals on the upper surface of the horizontal pipe and inserting vertical pipes into the holes;

[0021] Use temporary baffles to surround the frame and pour cement matrix into the frame;

[0022] A seepage groove is opened on the surface of the cement matrix, and a base is obtained after solidification.

[0023] Optionally, the method for preparing the base for radioactive tailings stacking further includes:

[0024] When the cement matrix is ​​not solidified, laying anti-slip strips on the surface of the cement matrix;

[0025] After the cement matrix is ​​solidified, the anti-skid strip is polished to form anti-skid patterns on the surface of the cement matrix.

[0026] Optionally, the anti-slip strip is a bamboo pole or a bamboo piece.

[0027] Optionally, the angle between the anti-slip strip and the inclination direction of the ground is greater than or equal to 15°.

[0028] Optionally, the additive includes Al3O2 and SiO2, and the Al3O2 in the additive is ≥10wt%, and the SiO2 is ≥15wt%.

[0029] Optionally, the mass ratio of the activator, cement, additive and ore leaching residue is 100:(58-65):(65-70):(175-185).

[0030] Optionally, the amount of potassium carbonate added is 0.3-0.8wt% of the intermediate solution, and the purity of the potassium carbonate is above 99%.

[0031] The beneficial effects of the present invention are:

[0032] The present invention makes a base for the tailings pile, which is used to receive the solidified pile on the soil or inclined ground, and isolate the nuclides from penetrating into the ground at the bottom of the pile. The seepage trough and drainage channel arranged on the base can guide the seepage liquid to flow out of the pile for treatment. The preparation of the base utilizes the sedimentation mother liquor waste liquid and the tailings leaching residue to form a stable, solidified, high-strength gelled inclusion, which can inhibit the release of radioactive nuclides for a long time and prevent harmful substances from entering the air, water, soil and other environments.

[0033] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the framework structure in the embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of the horizontal pipeline and the vertical pipeline structure in the embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of the base structure for radioactive tailings stacking in an embodiment of the present application.

[0037] Explanation of symbols: 1-frame; 2-cement matrix; 3-horizontal pipe; 4-vertical pipe; 5-anti-slip groove; 6-seepage groove. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] In this application, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0040] Uranium ore leaching residue and uranium-containing polymetallic ore beneficiation tailings are solidified and piled up as tailings waste rock. Due to the heavy weight of the solidified piles, they cannot be directly placed on soft muddy or inclined ground, and the leachate may contaminate the soil and water.

[0041] like Figures 1 to 3 As shown, in order to solve the existing technical problems, the present application proposes a base for radioactive tailings stacking, comprising:

[0042] Frame 1;

[0043] A cement matrix 2, wherein the cement matrix 2 is filled in the frame 1, and a seepage groove 6 is provided on the upper surface of the cement matrix 2;

[0044] A transverse pipe 3, wherein the transverse pipe 3 is horizontally buried in the cement matrix 2, and at least one end of the transverse pipe 3 exceeds the frame 1;

[0045] Vertical pipes 4, each of the horizontal pipes 3 is connected to a plurality of vertical pipes 4 to form a drainage channel; the upper ports of the vertical pipes 4 are all located in the seepage groove 6, and the upper ports are flush with the lowest point of the seepage groove 6;

[0046] The preparation method of the cement matrix 2 comprises:

[0047] The precipitation mother liquor is exchanged through a calcium-type cationic saturated resin to obtain a calcium-rich mother liquor;

[0048] adding calcium oxide to the calcium-rich mother liquor to obtain an intermediate solution;

[0049] Adding potassium carbonate to the intermediate solution, stirring and mixing, allowing to stand, and filtering to obtain an activator;

[0050] The cement, additives, ore leaching residue and the activator are mixed and solidified into a shape.

[0051] The present application utilizes sedimentation mother liquor waste and leaching residue waste to prepare a base for fixing and receiving a radioactive tailings pile to realize waste utilization. The base is provided with a seepage trough 6 and a drainage channel to collect seepage liquid from the radioactive tailings pile to prevent the seepage liquid from contaminating the soil and water sources near the pile.

[0052] Mines are generally located in mountainous areas. Due to geographical restrictions, the ground at the stacking point is often inclined, and the stacking body may be displaced during stacking. Therefore, as an optional implementation, anti-slip grooves 5 are provided on the surface of the cement matrix 2 to increase the friction between the base and the leached slag stacking body to prevent the stacking body from sliding on the base under terrain conditions with a height difference.

[0053] As an optional embodiment, the vertical pipes 4 in the frame 1 are arranged in a matrix, and the vertical pipes 4 in each row are on the same straight line, and the seepage grooves 6 overlap with the vertical pipes 4 in each row. Figure 1 and Figure 2As shown, when the frame 1 is woven, it is divided into several grids at equal intervals, and four horizontal pipes 3 are arranged at equal intervals in the frame 1 to divide the internal space of the frame 1 into several small grids, and then vertical pipes 4 are arranged on the four horizontal pipes 3 in the same manner to form a matrix arrangement. A seepage groove 6 is arranged along each row of vertical pipes 4.

[0054] Based on the same inventive concept, the present application also provides a method for preparing the above-mentioned radioactive tailings stacking base, comprising:

[0055] Weaving a frame 1 according to the terrain conditions of the stacking location;

[0056] Arrange the transverse pipe 3 in the frame 1. If the ground is inclined, make the axial direction of the transverse pipe 3 consistent with the inclination direction, so that the lower end of the transverse pipe 3 exceeds the frame 1;

[0057] Open holes at preset intervals on the upper surface of the horizontal pipe 3, and insert the vertical pipe 4 into the holes;

[0058] The frame 1 is surrounded by temporary baffles, and the cement matrix 2 is poured into the frame 1;

[0059] A seepage groove 6 is reserved on the surface of the cement matrix 2; after solidification, a base is obtained.

[0060] When preparing the base according to the present method, the horizontal pipe 3 is arranged along the inclined direction according to the terrain conditions, and the collected seepage fluid can automatically flow out of the horizontal pipe 3 under the action of gravity; when weaving the frame 1, the heights of the two ends of the frame 1 can be adjusted according to the inclination of the ground, and leveling is performed in advance, that is, the heights of the two ends of the frame 1 can be inconsistent, so that the height of the end located under the slope is higher, so as to prevent the upper surface of the base from being tilted too much.

[0061] As an optional implementation, the method for preparing the base for radioactive tailings stacking further includes:

[0062] When the cement matrix 2 is not solidified (semi-dry), an anti-slip strip is laid on the surface of the cement matrix 2;

[0063] After the cement substrate 2 is cured, the anti-slip strip is polished to form anti-slip lines 5 on the surface of the cement substrate 2. The anti-slip strip is a protrusion laid on the surface of the cement substrate 2. As an optional embodiment, the anti-slip strip is a thin bamboo pole or bamboo piece, and the bamboo pole or bamboo piece is immersed in the cement surface by about 0.5 cm. After curing, the upper part of the bamboo pole is slightly polished with a grinder to make its surface rougher.

[0064] Preferably, the frame 1, the horizontal pipes 3 and the vertical pipes 4 in the present application can also be made of bamboo. Firstly, bamboo poles or bamboo strips can be obtained locally near the mine and are low in cost. Secondly, bamboo has great toughness and can effectively prevent breakage.

[0065] As an optional embodiment, the angle between the anti-slip strip and the ground inclination direction is greater than or equal to 15°. The anti-slip strip is used to prevent the stacked body from sliding, and the setting direction cannot be consistent with the inclination direction, so the anti-slip strip needs to be set obliquely.

[0066] As an optional embodiment, the additive includes Al3O2 and SiO2, wherein Al3O2≥10wt%, SiO2≥15wt%. The addition of Al3O2 and SiO2 can effectively reduce the precipitation amount of toxic and harmful elements, while improving the strength of the solidified body, and the uranium concentration in the effluent under immersion conditions is also significantly reduced. The aluminum-oxygen ratio in the additive is 1.2-1.4. The aluminum-oxygen ratio is also called the aluminum-oxygen rate or the iron rate, which indicates the ratio of the content of aluminum oxide (Al2O3) to iron oxide (Fe2O3); the aluminum-oxygen ratio will affect the key properties of the material after solidification, such as strength and crack resistance. Therefore, the present invention has determined through experiments that in this formula, when the aluminum-oxygen ratio of the additive is 1.2-1.4, the material performance reaches the optimal level.

[0067] As an optional embodiment, the mass ratio of the activator, cement, additive and ore leaching residue is 100:(58-65):(65-70):(175-185). The activator obtained by modifying the precipitation mother solution in the present application is an alkali activator. The alkali activator introduces alkali ions into the concrete to promote the chemical reaction between the silicate minerals in the concrete and water to generate secondary hydration products. These products can fill the microscopic pores inside the concrete and improve the density and durability of the concrete.

[0068] As an optional embodiment, the amount of potassium carbonate added is 0.3-0.8wt% of the intermediate solution, and the purity of the potassium carbonate is above 99%. The present invention has found in research that when only calcium oxide is added, pores are likely to appear inside the solidified body. By adding potassium carbonate, the compactness inside the solidified body can be improved, thereby enhancing the strength of the solidified body. At the same time, there are some impurities in the precipitation mother liquor, and when it is modified, potassium carbonate is added to form a precipitate to remove the impurities.

[0069] The following describes the embodiments of the present invention through specific examples.

[0070] Example 1

[0071] A method for preparing a base for radioactive tailings stacking, comprising:

[0072] S1, weaving a bamboo frame 1 according to the terrain conditions of the stacking location;

[0073] S2. Arrange the transverse pipe 3 in the frame 1, ensure that the axial direction and the inclined direction of the transverse pipe 3 are consistent, make the lower end of the transverse pipe 3 exceed the frame 1, and fix the transverse pipe 3 to the frame 1 with a rope;

[0074] S3, drilling holes at preset intervals on the upper surface of the horizontal pipe 3, and inserting the vertical pipe 4 into the holes;

[0075] S4, using wooden boards as temporary baffles to surround the frame 1 on all sides, and pouring cement matrix 2 into the frame 1;

[0076] S5. A seepage groove 6 is reserved on the surface of the cement matrix 2. The seepage groove 6 is used to guide the seepage liquid of the tailings pile on the base into the vertical pipe 4. The upper end of the vertical pipe 4 is flush with the lowest point of the seepage groove 6. After solidification, the base is obtained.

[0077] The preparation method of the cement matrix 2 comprises:

[0078] S41, exchanging the precipitation mother liquor through a calcium type cationic saturated resin to obtain a calcium-rich mother liquor;

[0079] The NaOH content in the precipitation mother solution is 16wt% and the uranium concentration is 2.7mg / L;

[0080] S42, adding calcium oxide to the calcium-rich mother liquor to obtain an intermediate solution;

[0081] Add CaO to the calcium-rich mother liquor, mix and stir for 0.5h, and adjust the OH - Concentration up to 1.6 mol / L;

[0082] S43, adding potassium carbonate to the intermediate solution, stirring and mixing, letting stand, filtering, and obtaining an activator;

[0083] The amount of potassium carbonate added is 0.5wt% of the intermediate solution, the purity of potassium carbonate is above 99%, and the mixture is mixed and stirred for 1h after addition;

[0084] S44, mixing cement, additives, leached residue and the activator, and solidifying and forming;

[0085] The cement is silicate cement; the additive contains 15wt% Al3O2 and 25wt% SiO2, the aluminum-oxygen ratio is 1.2, and the balance is water; and particles with a particle size of 80-100 mesh account for more than 80% of the leached slag.

[0086] The activator: cement: additive: leached residue are mixed in a mass ratio of 100:60:68:180 to obtain a mixture.

[0087] Example 2

[0088] A method for preparing a base for radioactive tailings stacking, comprising:

[0089] S1, weaving a bamboo frame 1 according to the terrain conditions of the stacking location;

[0090] S2. Arrange the horizontal pipe 3 in the frame 1. If the ground is inclined, ensure that the axial direction of the horizontal pipe 3 is consistent with the inclined direction, so that the lower end of the horizontal pipe 3 exceeds the frame 1, and use ropes to tie the horizontal pipe 3 to the frame 1 and fix it;

[0091] S3, drilling holes at preset intervals on the upper surface of the horizontal pipe 3, and inserting the vertical pipe 4 into the holes;

[0092] S4, using wooden boards as temporary baffles to surround the frame 1 on all sides, and pouring cement matrix 2 into the frame 1;

[0093] S5. A seepage groove 6 is reserved on the surface of the cement matrix 2. The seepage groove 6 is used to guide the seepage liquid of the tailings pile on the base into the vertical pipe 4. The upper end of the vertical pipe 4 is flush with the lowest point of the seepage groove 6. After solidification, the base is obtained.

[0094] The preparation method of the cement matrix 2 comprises:

[0095] S41, exchanging the precipitation mother liquor through a calcium type cationic saturated resin to obtain a calcium-rich mother liquor;

[0096] The NaOH content in the precipitation mother solution is 18.1wt% and the uranium concentration is 3.5mg / L;

[0097] S42, adding calcium oxide to the calcium-rich mother liquor to obtain an intermediate solution;

[0098] Add CaO to the calcium-rich mother liquor, mix and stir for 0.5h, and adjust the OH - Concentration up to 1.7 mol / L;

[0099] S43, adding potassium carbonate to the intermediate solution, stirring and mixing, letting stand, filtering, and obtaining an activator;

[0100] The amount of potassium carbonate added is 0.7wt% of the intermediate solution, the purity of potassium carbonate is above 99%, and the mixture is mixed and stirred for 1h after addition;

[0101] S44, mixing cement, additives, leached residue and the activator, and solidifying and forming;

[0102] The cement is silicate cement; the additive contains 20wt% Al3O2 and 25wt% SiO2, the aluminum-oxygen ratio is 1.2, and the balance is water; and particles with a particle size of 80-100 mesh account for more than 80% of the leached slag.

[0103] The activator: cement: additive: leached residue are mixed in a mass ratio of 100:65:65:175 to obtain a mixture.

[0104] Example 3

[0105] A method for preparing a base for radioactive tailings stacking, comprising:

[0106] S1, weaving a bamboo frame 1 according to the terrain conditions of the stacking location;

[0107] S2. Arrange the horizontal pipe 3 in the frame 1. If the ground is inclined, ensure that the axial direction of the horizontal pipe 3 is consistent with the inclined direction, so that the lower end of the horizontal pipe 3 exceeds the frame 1, and use bamboo strips to tie the horizontal pipe 3 to the frame 1 and fix it;

[0108] S3, drilling holes at preset intervals on the upper surface of the horizontal pipe 3, and inserting the vertical pipe 4 into the holes;

[0109] S4, using wooden boards as temporary baffles to surround the frame 1 on all sides, and pouring cement matrix 2 into the frame 1;

[0110] S5. A seepage groove 6 is reserved on the surface of the cement matrix 2. The seepage groove 6 is used to guide the seepage liquid of the tailings pile on the base into the vertical pipe 4. The upper end of the vertical pipe 4 is flush with the lowest point of the seepage groove 6. After solidification, the base is obtained.

[0111] The preparation method of the cement matrix 2 comprises:

[0112] S41, exchanging the precipitation mother liquor through a calcium type cationic saturated resin to obtain a calcium-rich mother liquor;

[0113] The NaOH content in the precipitation mother solution is 18.4wt% and the uranium concentration is 4.7mg / L;

[0114] S42, adding calcium oxide to the calcium-rich mother liquor to obtain an intermediate solution;

[0115] Add CaO to the calcium-rich mother liquor, mix and stir for 0.5h, and adjust the OH - Concentration up to 1.7 mol / L;

[0116] S43, adding potassium carbonate to the intermediate solution, stirring and mixing, letting stand, filtering, and obtaining an activator;

[0117] The amount of potassium carbonate added is 0.4wt% of the intermediate solution, the purity of potassium carbonate is above 99%, and the mixture is mixed and stirred for 1h after addition;

[0118] S44, mixing cement, additives, leached residue and the activator, and solidifying and forming;

[0119] The cement is silicate cement; the additive contains 10wt% Al3O2 and 15wt% SiO2, the aluminum-oxygen ratio is 1.2, and the balance is water; and particles with a particle size of 80-100 mesh account for more than 80% of the leached slag.

[0120] The activator: cement: additive: leached residue are mixed in a mass ratio of 100:60:66:185 to obtain a mixture.

[0121] Comparative Example 1

[0122] The preparation method of this comparative example is basically the same as that of Example 1, except that when preparing the cement matrix 2, potassium carbonate is not added to the intermediate solution for modification.

[0123] Comparative Example 2

[0124] The preparation method of this comparative example is basically the same as that of Example 1, except that the contents of Al3O2 and SiO2 components in the additive are reduced to 5wt% and 10wt%, respectively.

[0125] The cement matrix 2 prepared in Examples 1-3 and Comparative Examples 1-2 was tested as follows:

[0126] Compressive strength test: The compressive strength of the solidified body was tested in accordance with GB / T 17671-1999;

[0127] Surface radon exhalation rate detection: Measure the radon exhalation rate of the solidified body surface according to EJT 979-1995;

[0128] Toxicity leaching test: Soak the solidified body in water for 7 days and measure the uranium concentration in the leaching solution.

[0129] The test results are shown in Table 1:

[0130] Table 1

[0131]

[0132] It can be seen from the test results in Table 1 that when Comparative Example 1 does not use potassium carbonate to modify the precipitation mother liquor, the compressive strength of the solidified body will decrease; when Comparative Example 2 reduces the content of Al3O2 and SiO2 components in the additive, the strength of the solidified body decreases, and at the same time, the fixation effect on toxic and harmful substances becomes worse, and the release rate of radionuclides increases.

[0133] This method not only reuses the precipitation mother liquor waste, but also improves the disposal level of leaching residue and reduces the reagent consumption and process complexity of waste treatment. The precipitation mother liquor waste is mixed with other components for modification to obtain an activator, which is then used with cement and additives to solidify the uranium ore leaching residue to form a stable, solidified, high-strength, and non-precipitated cement matrix 2, whose surface radioactivity index is less than the background value. The cement matrix 2 can be prepared and used on site at the stacking point, reducing the transportation process.

[0134] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A base for storing radioactive tailings, characterized in that ,include: Framework (1); A cement matrix (2), wherein the cement matrix (2) is filled in the frame (1), and a seepage groove (6) is provided on the upper surface of the cement matrix (2); A transverse pipe (3), wherein the transverse pipe (3) is horizontally buried in the cement matrix (2), and at least one end of the transverse pipe (3) exceeds the frame (1); A vertical pipe (4), each of the horizontal pipes (3) is connected to a plurality of vertical pipes (4) to form a drainage channel; the upper ports of the vertical pipes (4) are all located in the seepage groove (6), and the upper ports are flush with the lowest point of the seepage groove (6); The preparation method of the cement matrix (2) comprises: The precipitation mother liquor is exchanged through a calcium-type cationic saturated resin to obtain a calcium-rich mother liquor; adding calcium oxide to the calcium-rich mother liquor to obtain an intermediate solution; Adding potassium carbonate to the intermediate solution, stirring and mixing, allowing to stand, and filtering to obtain an activator; The cement, additives, ore leaching residue and the activator are mixed and solidified into a shape.

2. A radioactive tailings stacking base according to claim 1, characterized in that The surface of the cement matrix (2) is provided with anti-slip grooves (5).

3. A radioactive tailings stacking base according to claim 1, characterized in that The vertical pipes (4) in the frame (1) are arranged in a matrix, and the vertical pipes (4) in each row are on the same straight line. The seepage groove (6) coincides with each row of vertical pipes (4).

4. The method for preparing a base for radioactive tailings stacking according to claim 1, characterized in that ,include: Weaving a frame (1) according to the topographical conditions of the stacking location; Arranging a transverse pipe (3) in the frame (1), and if the ground is inclined, making the axial direction of the transverse pipe (3) consistent with the inclination direction, so that the lower end of the transverse pipe (3) exceeds the frame (1); Opening holes at preset intervals on the upper surface of the horizontal pipe (3), and inserting vertical pipes (4) into the holes; The frame (1) is surrounded by temporary baffles, and a cement matrix (2) is poured into the frame (1); A seepage groove (6) is provided on the surface of the cement matrix (2), and a base is obtained after solidification.

5. The method for preparing a base for radioactive tailings stacking according to claim 4, characterized in that The method for preparing the base for radioactive tailings stacking also includes: When the cement matrix (2) is not solidified, an anti-slip strip is laid on the surface of the cement matrix (2); After the cement matrix (2) is solidified, the anti-skid strip is polished to form an anti-skid pattern (5) on the surface of the cement matrix (2).

6. The method for preparing a base for radioactive tailings stacking according to claim 5, characterized in that , the anti-slip strip is a bamboo pole or a bamboo piece.

7. The method for preparing a base for radioactive tailings stacking according to claim 5, characterized in that , the angle between the anti-slip strip and the inclination direction of the ground is greater than or equal to 15°.

8. The method for preparing a base for radioactive tailings stacking according to claim 4, characterized in that , the additive includes Al3O2 and SiO2, wherein Al3O2≥10wt%, SiO2≥15wt%.

9. The method for preparing a base for radioactive tailings stacking according to claim 4, characterized in that , the mass ratio of the activator, cement, additive and ore leaching residue is 100:(58-65):(65-70):(175-185).

10. The method for preparing a base for radioactive tailings stacking according to claim 4, characterized in that The amount of potassium carbonate added is 0.3-0.8wt% of the intermediate solution, and the purity of potassium carbonate is above 99%.

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