Preparation device and method of environment-friendly mine grouting material

Abstract

The application relates to the technical field of grouting materials, and discloses a preparation device and a preparation method of an environment-friendly mine grouting material; when the grouting material is prepared, polycarboxylic acid dispersants, sodium gluconate, sodium silicate and calcium chloride are added into cement slurry, the fluidity and the impermeability of the grouting material are effectively improved, meanwhile, the rotating outer rod and the rotating inner rod are arranged to rotate in opposite directions, the rotating inner rod drives the outer stirring rod and the scraper body to rotate counterclockwise, the scraper body scrapes off the raw materials adhered to the inner wall of the preparation barrel, the rotating outer rod drives the arc-shaped stirring rod to rotate clockwise, the grouting material flows in the flow guide plate, part of the grouting material is discharged through the flow-through holes, part of the grouting material is discharged through the flow guide grooves, the grouting material is divided into two parts, the grouting material is dispersed under the action of the flow guide plate, the grouting material collides with the convex block body, the flow guide plate and the outer stirring rod rotate in opposite directions, the grouting material is mixed more uniformly, and the fluidity and the impermeability of the grouting material are strengthened.

Description

Technical Field

[0001] This invention relates to the field of grouting materials technology, and in particular to an environmentally friendly mining grouting material preparation apparatus and preparation method. Background Technology

[0002] Grouting materials are a type of functional material that is injected into strata, structural gaps, or concrete defects through pressure grouting or other methods to achieve engineering purposes such as filling, reinforcement, seepage prevention, water plugging, and improvement of medium properties. Its core function is to use its own fluidity, reactivity, or curing characteristics to form a solidified body with specific mechanical or physical properties in the target area, thereby solving problems such as leakage, looseness, and insufficient strength in engineering projects.

[0003] According to Chinese Patent Publication No. CN119797868B, this invention relates to a high-performance environmentally friendly synchronous grouting material and its preparation method. The raw materials of the synchronous grouting material, by weight, include 10-15 parts cement, 15-20 parts slag, 20-30 parts steel slag, 300-320 parts fine sand containing mud powder, 0.075-0.1 parts iron sulfide, 0.05-0.12 parts graphene oxide, 0.03-0.09 parts N,N-diisopropylformamide, and 45-50 parts water. This invention uses fine sand containing mud powder as raw material to replace bentonite and fine sand in the original synchronous grouting material, and combines cement, slag, iron sulfide, graphene oxide, and other materials. The synergistic effect between the components gives the prepared synchronous grouting material excellent impermeability and compressive strength, and it has a short setting time, is low-carbon and environmentally friendly, and has high economic and social benefits.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: existing grouting materials have poor fluidity and impermeability during use. Grout with insufficient fluidity is difficult to penetrate into the fine cracks under pressure, resulting in some areas not being filled. Poor impermeability means that the cured grout body has many interconnected pores or microcracks, which cannot block the penetration path of water, gas or corrosive media, and may cause piping and leakage, threatening structural safety. Summary of the Invention

[0005] The technical problem to be solved by this invention is that the existing technology has the disadvantage of poor fluidity and impermeability of grouting materials. To this end, we propose an environmentally friendly mining grouting material preparation device and preparation method.

[0006] To achieve the above objectives, this application adopts the following technical solution: a method for preparing an environmentally friendly mining grouting material, comprising: cement slurry, polycarboxylate dispersant, sodium gluconate, sodium silicate, and calcium chloride;

[0007] 100 kg of cement slurry was poured into the preparation device and stirred. 0.3 kg of polycarboxylate dispersant was slowly poured into the preparation device and stirred for 5 minutes. Then, 0.2 kg of sodium gluconate was evenly sprinkled into the slurry and stirred for another 3 minutes. Next, 4 kg of 30% sodium silicate was poured into the slurry in stages and stirred for 4 minutes. Finally, 1 kg of 20% calcium chloride was slowly added into the device and stirred for 6 minutes to obtain the grouting material.

[0008] Preferably, the addition of polycarboxylate-based dispersants allows them to be fully adsorbed onto the surface of cement particles, thereby exerting a dispersing effect and improving the fluidity of the slurry.

[0009] Preferably, the uniform dispersion of sodium gluconate is used to delay the setting of cement slurry, allowing time for subsequent additive mixing.

[0010] Preferably, the 30% concentration sodium silicate is divided into 4 parts, each weighing 1 kg, with a one-minute interval between each addition. The sodium silicate is evenly dispersed in the slurry, and can slowly react with calcium ions in the cement to initially improve the slurry structure.

[0011] Preferably, the combined use of calcium chloride and sodium silicate improves the fluidity and impermeability of the grouting material.

[0012] An environmentally friendly mining grouting material preparation device, characterized in that it comprises: a preparation tank body, an outer rotating rod rotatably connected inside the preparation tank body, an inner rotating rod rotatably connected inside the outer rotating rod, a fixed ring fixedly connected to the outer wall of the outer rotating rod, a movable ring provided at the top of the fixed ring, an arc-shaped stirring rod fixedly connected to the side of the movable ring, a guide plate provided inside the arc-shaped stirring rod, a flow hole provided inside the guide plate, a fan blade connecting plate fixedly connected to the inner wall of the guide plate, a guide fan blade rotatably connected to the side of the fan blade connecting plate, and a flow-guiding block fixedly connected to the side of the guide plate. A flow guide plate is fixedly connected to the inner wall of the container. A protrusion body is provided on the side of the flow guide plate. An outer stirring rod is fixedly connected to the side of the rotating inner rod. A scraper body is fixedly connected to the outer wall of the outer stirring rod. A T-shaped limiting block is fixedly connected to the top of the outer stirring rod. A first gear is fixedly connected to the top of the rotating outer rod. A second gear meshes with the side of the first gear. The second gear is fixedly connected to the output end of the first motor. A third gear is fixedly connected to the top of the rotating inner rod. A fourth gear meshes with the side of the third gear. The fourth gear is fixedly connected to the output end of the second motor. A feed inlet is fixedly connected to the top of the preparation tank body.

[0013] Preferably, the movable ring and the rotating outer rod are slidably connected, and the rotating outer rod and the rotating inner rod rotate in opposite directions.

[0014] Preferably, both the movable ring and the arc-shaped stirring rod are hollowed out, with the arc-shaped stirring rod floating inside the grouting material.

[0015] Preferably, the protrusion body and the diversion block are fixedly connected, and the scraper body and the preparation barrel body are tightly fitted together.

[0016] Preferably, the first motor and the preparation tank body are fixedly connected, and the second motor and the preparation tank body are also fixedly connected.

[0017] The technical effects and advantages of this invention are as follows:

[0018] In this invention, polycarboxylate dispersant, sodium gluconate, sodium silicate, and calcium chloride are added to the cement slurry during the preparation of the grouting material. This effectively improves the fluidity and impermeability of the grouting material. Simultaneously, an outer rotating rod and an inner rotating rod are configured to rotate in opposite directions. The inner rotating rod drives the outer stirring rod and scraper body to rotate counterclockwise. The scraper body scrapes away the raw material adhering to the inner wall of the preparation tank. The outer rotating rod drives the arc-shaped stirring rod to rotate clockwise. The grouting material flows within the guide plate, with some exiting through the flow holes and some through the guide groove, forming a diversion. The grouting material is dispersed under the action of the guide plate. The grouting material impacts the protrusion body, and combined with the counterclockwise rotating guide plate and outer stirring rod, the grouting material is mixed more evenly, enhancing its fluidity and impermeability. Attached Figure Description

[0019] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0020] Figure 1 This is a flowchart of the preparation method of the environmentally friendly mining grouting material of the present invention;

[0021] Figure 2 This is an enlarged structural schematic diagram of the environmentally friendly mining grouting material preparation device of the present invention;

[0022] Figure 3 This is a cross-sectional structural schematic diagram of the environmentally friendly mining grouting material preparation device of the present invention;

[0023] Figure 4 This is an exploded structural diagram of the environmentally friendly mining grouting material preparation device of the present invention;

[0024] Figure 5 This is an enlarged structural schematic diagram of the external stirring rod portion of the present invention;

[0025] Figure 6 This is an enlarged structural schematic diagram of the arc-shaped stirring rod portion of the present invention;

[0026] Figure 7 This is an enlarged structural schematic diagram of the movable ring portion of the present invention;

[0027] Figure 8 This is an enlarged structural schematic diagram of the guide channel portion of the present invention;

[0028] Figure 9 This is an enlarged structural schematic diagram of the drainage block portion of the present invention;

[0029] Figure 10 For the present invention Figure 3 Enlarged structural diagram at point A;

[0030] Figure 11 For the present invention Figure 3 A magnified structural diagram at point B in the middle.

[0031] Legend: 1. Preparation tank body; 2. Rotating outer rod; 3. Rotating inner rod; 4. Arc-shaped stirring rod; 5. Guide plate; 6. Flow hole; 7. Fan blade connecting plate; 8. Guide fan blade; 9. Drain block; 10. Drain plate; 11. Protrusion body; 12. Outer stirring rod; 13. Scraper body; 14. T-shaped limiting block; 15. First gear; 16. Second gear; 17. First motor; 18. Third gear; 19. Fourth gear; 20. Second motor; 21. Fixed ring; 22. Movable ring; 23. Guide groove; 24. Feed inlet. Detailed Implementation

[0032] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0033] According to one embodiment of the present invention, Figures 1 to 11 As shown.

[0034] Existing grouting materials suffer from poor fluidity and impermeability during use. Insufficient fluidity makes it difficult for the grout to penetrate into fine cracks under pressure, resulting in some areas remaining unfilled. Poor impermeability means that the cured grout contains numerous interconnected pores or micro-cracks, failing to block the penetration paths of water, gas, or corrosive media, potentially leading to piping and leakage, threatening structural safety. The selection and performance research of grouting materials are crucial for grouting and water plugging in coal mine roadways. Commonly used grouting materials include cement grout, chemical grout, and polymer grout. Cement grout is low-cost and stable, but its reaction time and strength development are slow; chemical grout has a faster reaction time and strength development, but its cost is high and it has a significant environmental impact; polymer grout has strong adaptability and good impermeability, but its cost is high and its construction is difficult. To address this issue, this invention designs the following method for preparing an environmentally friendly mining grouting material:

[0035] A method for preparing an environmentally friendly mining grouting material includes: cement slurry, polycarboxylate dispersant, sodium gluconate, sodium silicate, and calcium chloride. 100 kg of cement slurry is poured into a preparation device and stirred. 0.3 kg of polycarboxylate dispersant is slowly poured into the device and stirred for 5 minutes. Then, 0.2 kg of sodium gluconate is evenly sprinkled into the slurry and stirred for another 3 minutes. Next, 4 kg of 30% sodium silicate is poured into the slurry in stages and stirred for 4 minutes. Finally, 1 kg of 20% sodium silicate is added... Calcium chloride of a certain concentration is slowly added to the device, and after stirring for 6 minutes, the grouting material is obtained. The addition of polycarboxylate dispersant allows it to be fully adsorbed on the surface of cement particles, exerting a dispersing effect and improving the fluidity of the grout. The uniform dispersion of sodium gluconate is used to delay the setting of cement grout, allowing time for subsequent additive mixing. 30% sodium silicate is divided into 4 portions, each 1 kg, with a one-minute interval between each portion. Sodium silicate is uniformly dispersed in the grout. Sodium silicate can slowly react with calcium ions in cement, initially improving the grout structure. The combined use of calcium chloride and sodium silicate improves the fluidity and impermeability of the grouting material.

[0036] In the preparation of grouting materials, polycarboxylate dispersants, sodium gluconate, sodium silicate, and calcium chloride are added to the cement slurry. The combination of polycarboxylate dispersants, sodium silicate, and calcium chloride specifically improves the fluidity of the cement slurry. The reaction between sodium silicate and calcium ions in cement, as well as the synergistic effect of calcium and silicon, helps to improve the impermeability of the solidified body. The additives are added in stages to reduce the reaction imbalance caused by excessive local concentration, ensure uniform mixing, and reduce performance fluctuations caused by operational errors. Sodium gluconate delays setting, providing sufficient operating time for long-distance grouting in the well. The reaction products of sodium silicate and calcium chloride can enhance the material's adaptability to complex geological conditions in the mine, which is beneficial to improving the fluidity and impermeability of the grouting material.

[0037] An environmentally friendly mining grouting material preparation device, characterized in that it comprises: a preparation tank body 1, used for mixing raw materials; a rotating outer rod 2 rotatably connected inside the preparation tank body 1; a rotating inner rod 3 rotatably connected inside the rotating outer rod 2; a fixed ring 21 fixedly connected to the outer wall of the rotating outer rod 2; a movable ring 22 provided at the top of the fixed ring 21; an arc-shaped stirring rod 4 fixedly connected to the side of the movable ring 22; a guide plate 5 provided inside the arc-shaped stirring rod 4; a flow hole 6 provided inside the guide plate 5; a fan blade connecting plate 7 fixedly connected to the inner wall of the guide plate 5; a guide fan blade 8 rotatably connected to the side of the fan blade connecting plate 7; a flow guide block 9 fixedly connected to the side of the guide plate 5; a flow guide plate 10 fixedly connected to the inner wall of the flow guide block 9; a protrusion body 11 provided on the side of the flow guide plate 10; an outer stirring rod 12 fixedly connected to the side of the rotating inner rod 3; and a scraper body 13 fixedly connected to the outer wall of the outer stirring rod 12. A T-shaped limiting block 14 is fixedly connected to the top of the outer stirring rod 12. A first gear 15 is fixedly connected to the top of the rotating outer rod 2. A second gear 16 meshes with the side of the first gear 15. The second gear 16 is fixedly connected to the output end of the first motor 17. A third gear 18 is fixedly connected to the top of the rotating inner rod 3. A fourth gear 19 meshes with the side of the third gear 18. The fourth gear 19 is fixedly connected to the output end of the second motor 20. Both the first motor 17 and the second motor 20 are servo motors. A servo motor is a special type of motor capable of precisely controlling speed, position, and torque. It is an actuator in a closed-loop control system and is widely used in scenarios requiring high-precision motion control. Its core feature is that it monitors its own motion state in real time through a feedback device and dynamically adjusts according to command signals, thereby achieving extremely high control accuracy and response speed. Meanwhile, the lead screws driven by the first motor 17 and the second motor 20 rotate in opposite directions. The top of the preparation tank body 1 is fixedly connected to the feed port 24. The movable ring 22 is slidably connected to the rotating outer rod 2. The rotating outer rod 2 and the rotating inner rod 3 rotate in opposite directions. The movable ring 22 and the arc-shaped stirring rod 4 are both hollowed out. The arc-shaped stirring rod 4 floats in the grouting material. The protrusion body 11 is fixedly connected to the guide block 9. The scraper body 13 is tightly fitted to the preparation tank body 1. The first motor 17 is fixedly connected to the preparation tank body 1, and the second motor 20 is fixedly connected to the preparation tank body 1.

[0038] When the device is in use, the grouting material is located inside the preparation tank body 1. The first motor 17 and the second motor 20 are started. The first motor 17 drives the second gear 16 to rotate, which in turn drives the first gear 15 and the outer rod 2 to rotate clockwise. The outer rod 2 drives the movable ring 22 and the arc-shaped stirring rod 4 to rotate clockwise. The back of the outer rod 2 has a vertical groove, and the movable ring 22 has a locking block inside, allowing it to slide up and down on the outer wall of the outer rod 2. Simultaneously, the outer rod 2 drives the movable ring 22 to rotate, causing it to float on the grout. When the grout submerges the arc-shaped stirring rod 4, the movable ring 22 is located at the top of the adjacent fixed ring 21 and is restricted by it. At the top of the grout, the arc-shaped stirring rod 4 floats and rotates on the surface of the grout. When the arc-shaped stirring rod 4 rotates clockwise, the grouting material... The material enters from the right end of the guide plate 5. The grouting material moves from right to left, and the part that contacts the flow hole 6 passes directly through, forming a small diversion. Most of the grouting material moves with the flow direction. Under the action of force, the guide fan blade 8 starts to rotate. The rotating guide fan blade 8 generates a leftward thrust, which promotes the movement of the grouting material. When the grouting material reaches the position of the guide block 9, it is divided into multiple paths by the guide plate 10. Each path has a protrusion body 11. The protrusion body 11 collides with the grouting material, causing the grout to fluctuate. The second motor 20 drives the fourth gear 19 to rotate. The fourth gear 19 drives the third gear 18 and the inner rod 3 to rotate counterclockwise. The inner rod 3 drives the outer stirring rod 12 and the scraper body 13 to rotate counterclockwise. The scraper body 13 scrapes off the raw materials adhering to the inner wall of the preparation tank body 1. When the mixed grouting material is used, it is transferred through the discharge port at the bottom of the preparation tank body 1.

[0039] The system is equipped with a rotating outer rod 2 and a rotating inner rod 3 that rotate in both directions. The rotating inner rod 3 drives the outer stirring rod 12 and the scraper body 13 to rotate counterclockwise. The scraper body 13 scrapes off the raw materials adhering to the inner wall of the preparation tank. The rotating outer rod 2 drives the arc-shaped stirring rod 4 to rotate clockwise. The grouting material flows within the guide plate 5, with part of it being discharged through the flow hole 6 and part through the guide groove 23, forming a split flow. The grouting material is dispersed under the action of the guide plate 10. The grouting material impacts the protrusion body 11. Combined with the rotating guide plate 5 and the outer stirring rod 12, the grouting material is mixed more evenly, enhancing its fluidity and impermeability. The flow of the grout drives the guide fan blade 8 to rotate. The rotation of the guide fan blade 8 generates thrust, promoting the flow of the grout. The forward and reverse rotation of the outer rod 2 and the inner rod 3 creates a strong reverse shear flow and turbulence. Combined with the flow guiding effect of the arc-shaped stirring rod 4, the flow hole 6, and the flow channel 23, the grouting material is repeatedly divided and reorganized during the flow. The dispersion of the flow guide plate 10 and the impact of the protrusion body 11 further break up the agglomerated particles, ensuring that the cement slurry and various additives are fully integrated. The scraper body 13 driven by the inner rod 3 can scrape off the raw materials adhering to the inner wall of the preparation tank in real time, preventing the cement slurry from hardening and clumping and mixing into the finished product. This ensures the purity of the slurry and reduces raw material loss. The guide fan blade 8 rotates automatically with the flow of the slurry, and the thrust it generates will adaptively adjust with the change of slurry viscosity. It can assist the slurry circulation without additional power, ensuring the different preparation stages. To improve flow stability, the guide fan blades 8 assist in degassing during operation, causing tiny bubbles to gradually converge and rise to the surface for discharge. Simultaneously, the uppermost arc-shaped stirring rod 4 floats on the surface of the grouting material. The guide fan blades 8 inside the uppermost arc-shaped stirring rod 4 directly act on the grout near the surface. When tiny bubbles generated by the bottom and middle layers of stirring rise to the surface, the guide fan blades agitate and tear the bubbles, causing them to burst and release gas. At the same time, the fan blades push the grout across the surface, dispersing locally accumulated bubbles and preventing their accumulation in a specific area. This reduces residual bubbles in the finished grout, enhancing the fluidity and impermeability of the grouting material. During the preparation process, the surface of the grouting material is exposed for extended periods. In air, moisture evaporation easily leads to surface crusting. The rotation of the uppermost guide fan blades continuously agitates the liquid surface, creating a circulation exchange between the surface and lower layers of slurry. This inhibits crusting at its source, ensuring the consistency of the slurry throughout the tank. Under the synergistic effect of the preparation device, all raw materials achieve deep fusion and uniform dispersion. At the microscopic level, this ensures sufficient contact and reaction between cement particles and polycarboxylate dispersants, sodium gluconate, sodium silicate, and calcium chloride additives. The dispersant effectively breaks up the agglomeration of cement particles, providing a foundation for slurry flow. The uniform distribution of retarders and accelerators coordinates the hydration reaction rhythm, avoiding local performance fluctuations. Sodium silicate and calcium chloride generate a dense calcium silicate gel throughout the entire process, filling the pores of cement hydration products.This thorough mixing not only ensures stable flowability of the grouting material during preparation and construction, but also fundamentally improves its impermeability by optimizing the microstructure of the hardened body. This ensures effective blocking of seepage channels in mine groundwater environments, balancing ease of construction with engineering durability, and enhancing both the flowability and impermeability of the grouting material.

[0040] The mine roadway roof contains sandstone pore water. With the extension of service life, some areas of the roadway have experienced significant seepage, water seepage, and even roof water inrush. On-site investigation revealed that the roof water seepage mainly flows out from the holes of the anchor bolts or anchor cables. The anchor cables and metal mesh of the existing support system, which have been soaked in water for a long time, are severely corroded. In some water-seeping areas, the grout layer has already peeled off from the roof. As water seepage continues, the coal and rock mass of the roof will soften significantly, which will exacerbate the fracturing of the surrounding rock. In order to improve the working environment in the roadway and optimize the surrounding rock conditions in the water-seeping areas, it is necessary to carry out renovation and treatment of the water-seeping areas on the roadway roof. After grouting treatment, the problem of dripping water from the roadway roof can be reduced or even eliminated, preventing safety accidents caused by roof water damage.

[0041] For the first time, a new type of grouting material was used for grouting and water plugging, which quickly blocked the water seepage problem in the roadway. At the same time, the material generates crystallization pressure and water absorption micro-expansion during the hydration and hardening process. After solidification, it produces a high-strength solidified body, which plays a role in filling and reinforcing. This achieves high-strength consolidation between the anchor cables, anchor rods and the borehole rock wall, thereby significantly improving the support effect of the anchor cables and anchor rods and effectively controlling water seepage in the roadway. This material is closest to polymer materials in terms of curing speed and strength. It is non-toxic, non-corrosive, and non-polluting. It has a low reaction temperature and does not spontaneously combust, which improves the safety of coal mine production and thus improves the economic and environmental benefits of the mine.

[0042] The grouting material has high permeability, low viscosity, and high rheological properties, which can fully fill the micropores and fissures of the coal seam, forming an effective plugging layer and improving the grouting effect. Compared with traditional cement grout, the new grouting material has relatively high strength and wear resistance, which can meet the requirements of long-term use in underground roadways. It also has rapid hardening, which can greatly shorten the construction cycle and achieve the expected results. It prevents the long-term immersion in water from causing corrosion of support components such as anchor cables and metal mesh, as well as the continuous softening of the roof.

[0043] To address the existing problem of water dripping from the roof of the tunnel, grouting is used to modify the softened surrounding rock caused by long-term water seepage, thereby improving the tunnel support strength and the integrity of the surrounding rock and preventing safety accidents caused by roof water damage. However, using anti-corrosion support materials and scaffolding supports presents numerous safety and management risks. These include: 1) the tunnel height and the need to build platforms; 2) the management of passing monorails, vehicles, and pedestrians; and 3) the need for carrying and transporting scaffolding beams, which poses a high safety risk, especially when installing the scaffolding beams. Furthermore, using anti-corrosion support materials and scaffolding supports requires a large number of management personnel, resulting in a large workload and long duration. Considering the high management costs from material transportation, platform construction, anti-corrosion material application, and scaffolding erection, grouting-based water plugging only requires one manager to oversee the site.

[0044] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A device for preparing environmentally friendly mining grouting material, characterized in that: include: A preparation tank body is included. An outer rotating rod is rotatably connected inside the preparation tank body. An inner rotating rod is rotatably connected inside the outer rotating rod. A fixed ring is fixedly connected to the outer wall of the outer rotating rod. A movable ring is provided at the top of the fixed ring. An arc-shaped stirring rod is fixedly connected to the side of the movable ring. A guide plate is provided inside the arc-shaped stirring rod. A flow hole is provided inside the guide plate. A fan blade connecting plate is fixedly connected to the inner wall of the guide plate. A guide fan blade is rotatably connected to the side of the fan blade connecting plate. A flow-guiding block is fixedly connected to the side of the guide plate. A flow-guiding plate is fixedly connected to the inner wall of the flow-guiding block. The guide plate has a protruding main body on its side. An outer stirring rod is fixedly connected to the side of the rotating inner rod. A scraper body is fixedly connected to the outer wall of the outer stirring rod. A T-shaped limiting block is fixedly connected to the top of the outer stirring rod. A first gear is fixedly connected to the top of the rotating outer rod. A second gear meshes with the side of the first gear. The second gear is fixedly connected to the output end of the first motor. A third gear is fixedly connected to the top of the rotating inner rod. A fourth gear meshes with the side of the third gear. The fourth gear is fixedly connected to the output end of the second motor. A feed inlet is fixedly connected to the top of the preparation tank body. The movable ring and the rotating outer rod are slidably connected, and the rotating outer rod rotates in the opposite direction to the rotating inner rod.

2. The preparation device for environmentally friendly mining grouting material according to claim 1, characterized in that: Both the movable ring and the arc-shaped stirring rod are designed with a hollowed-out shape.

3. The preparation device for environmentally friendly mining grouting material according to claim 1, characterized in that: The protrusion body and the diversion block are fixedly connected, and the scraper body and the preparation barrel body are tightly fitted together.

4. The preparation device for environmentally friendly mining grouting material according to claim 1, characterized in that: The first motor is fixedly connected to the preparation tank body, and the second motor is fixedly connected to the preparation tank body.

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