A filling material preparation device for backfilling coal mining by replacement and an operating method thereof

Abstract

The application discloses a kind of filling raw material preparation device for replacement filling coal mining and its operating method, it is related to coal mine processing technical field, the device includes preparation main part, the top of preparation main part one end is fixedly connected with feed pipe, and the bottom of preparation main part outer wall one side is fixedly connected with discharge pipe, and preparation main part outer wall near the side of discharge pipe is screw thread connection with a plurality of mutually symmetrical covers.The application is by starting spray gun, makes stabilizer pass through the flexible hose of liquid storage bin outer wall one end setting enters spray gun, and along with spray gun is sprayed into receiving groove, covers the coal gangue particle of glass tube rich heavy metal, further solves the problem that traditional replacement filling coal mining is used in filling raw material preparation device, since part is not completely reduced heavy metal ion, easy to be doped in coal gangue fine particle, after screening, cannot be targeted to the heavy metal of intensification stable processing, there is secondary heavy metal leaching hidden danger.

Description

A device for preparing backfill material for displacement backfilling coal mining and its operating method. Technical Field

[0001] This invention relates to the field of coal mine processing technology, specifically to a device for preparing backfill material for replacement backfilling coal mining and its operating method. Background Technology

[0002] With the continuous expansion of coal mining scale and the increasing complexity of coal mining conditions, coal seam mining is usually divided into multiple sections. To reduce the mutual influence between sections, protective coal pillars are often left in each section. To reduce the waste of coal resources, coal mine cemented filling slurry is made by using coal gangue, fly ash and other coal-based solid waste as the main raw materials. After crushing and screening, chemical stabilizers are added and the mixture is thoroughly stirred. Then, cement or slag powder and other solidifying agents, as well as auxiliary materials such as glass fiber, retarders and accelerators are added to fill the goaf of the coal mine, so as to eliminate the traditional protective coal pillars in each section.

[0003] However, in the preparation process of cemented filling slurry in coal mines, the mixed solid waste of coal gangue and fly ash after heavy metal reduction treatment needs to be screened to remove impurities and ensure material homogeneity in order to ensure the rheological properties, solidification stability and environmental compliance of the subsequent slurry. Traditional preparation equipment still has obvious shortcomings when screening this type of solid waste. First, screening only focuses on impurity removal and does not simultaneously homogenize the coal gangue, resulting in the dispersed distribution of coal gangue particles after screening. This leads to uneven mixing and large fluctuations in the fluidity of the subsequent slurry. Second, some heavy metal ions that are not completely reduced are easily mixed in the fine particles of coal gangue. After screening, it is impossible to carry out targeted strengthening and stabilization treatment of heavy metals, which poses a risk of secondary heavy metal leaching.

[0004] The following problems exist with the existing technology.

[0005] 1. During the use of existing replacement backfilling coal mining raw material preparation equipment, some heavy metal ions that are not completely eliminated are easily mixed into the fine particles of coal gangue. This makes it impossible to carry out targeted strengthening and stabilization treatment of heavy metals after screening, resulting in the potential problem of secondary heavy metal leaching.

[0006] 2. During the use of existing replacement and backfilling coal mining raw material preparation equipment, due to the limited range of stabilizer spraying, some heavy metal coal gangue particles are not completely wetted by the stabilizer. As a result, after the coal gangue particles are processed into coal mine cemented backfill slurry, heavy metal leakage still occurs, causing pollution to groundwater and soil. Summary of the Invention

[0007] This invention provides a device for preparing backfill material for replacement backfilling coal mining and its operating method, in order to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows.

[0009] A device for preparing backfill material for displacement backfilling coal mining includes a preparation body. A feed pipe is fixedly connected to one end of the top of the preparation body, and a discharge pipe is fixedly connected to the bottom of one side of the outer wall of the preparation body. Several symmetrical caps are threadedly connected to the side of the outer wall of the preparation body near the discharge pipe. A screening chamber is opened at the top of the inner cavity of the preparation body, and a processing chamber is opened at the bottom of the inner cavity of the preparation body. A processing component is provided on the inner wall of the processing chamber.

[0010] A partition is fixedly connected to one end of the top of the inner wall of the screening chamber, and an inclined plate is fixedly connected to the bottom of one side of the inner wall of the screening chamber. A discharge port is opened at one end of the outer wall of the partition, and an electrically controlled high-frequency screen is fixedly connected to the side of the outer wall of the partition near the discharge port, while a suspension roller mill is fixedly connected to the side of the outer wall of the partition away from the electrically controlled high-frequency screen.

[0011] A further improvement of the technical solution of the present invention is that: the processing component includes a plurality of mutually symmetrical support rods rotatably connected to one side of the inner wall of the processing chamber, and a worm gear is fixedly connected to one end of the outer wall of each of the support rods, while a sleeve is fixedly connected to the end of the outer wall of the support rod away from the worm gear. A discharge roller is fixedly connected to one end of the outer wall of the sleeve, and a support platform is rotatably connected to the bottom of one side of the outer wall of the sleeve. A metal detector is fixedly connected to the top of the support platform, and a limiting disk is fixedly connected to the end of the support platform. The outer wall of the limiting disk is rotatably connected to the inner wall of the discharge roller, and one side of the outer wall of the limiting disk is engaged with the outer wall of the cover.

[0012] A further improvement of the technical solution of the present invention is that: the outer wall of the discharge roller is provided with a plurality of mutually symmetrical receiving grooves, and the inner wall of the plurality of receiving grooves is slidably connected with glass tubes, and the end of the glass tubes is fixedly connected with limit blocks.

[0013] A further improvement of the technical solution of the present invention is that: an extension plate is fixedly connected to one end of the bottom of the processing chamber, and a semi-circular internal gear ring is fixedly connected to the top of the extension plate. The outer wall of the semi-circular internal gear ring is slidably connected to the inner cavity of the jacket. A plurality of linkage rods are rotatably connected to the inner cavity of the jacket, and a linkage gear is fixedly connected to the outer wall of each linkage rod. The outer wall of the linkage gear meshes with the inner wall of the semi-circular internal gear ring. A stirring frame is fixedly connected to the end of the linkage rod, and a support plate is fixedly connected to the end of the stirring frame. The outer wall of the support plate is rotatably connected to the inner wall of the glass tube.

[0014] A further improvement of the technical solution of the present invention is that: a drive motor is fixedly connected to one side of the outer wall of the preparation body, and a drive rod is fixedly connected to the output end of the drive motor. The outer wall of the drive rod penetrates and is rotatably connected to the outer wall of the preparation body. A worm is fixedly connected to the end of the drive rod, and the end of the worm is rotatably connected to the inner wall of the processing chamber. The outer wall of the worm meshes with the top of the worm wheel.

[0015] A further improvement of the technical solution of the present invention is that: both ends of the outer wall of the discharge roller are fixedly connected to support rings, and the outer wall of the support ring is rotatably connected to a limit frame, and the top of the limit frame is fixedly connected to the bottom of the inclined plate. A number of mutually symmetrical electric control valves are fixedly connected to the bottom of the inclined plate, and a support plate is fixedly connected to the bottom of the inclined plate between the number of electric control valves.

[0016] A further improvement of the technical solution of the present invention is that: a limiting groove is formed on one side of the outer wall of the support plate, and an electric control screw is rotatably connected to the inner wall of the limiting groove. A spray gun is threadedly connected to the outer wall of the electric control screw, and one side of the outer wall of the spray gun is slidably connected to the inner wall of the limiting groove.

[0017] A further improvement of the technical solution of the present invention is that: a flow guide chamber is fixedly connected to the top of one side of the inner wall of the processing chamber, and a liquid inlet pipe is fixedly connected to one side of the outer wall of the flow guide chamber. The outer wall of the liquid inlet pipe penetrates and is fixedly connected to the outer wall of the preparation body. A plurality of flow guide pipes are fixedly connected to the output end of the flow guide chamber, and a liquid storage chamber is fixedly connected to the end of each of the plurality of flow guide pipes. One side of the outer wall of the liquid storage chamber is fixedly connected to the side of the outer wall of the support plate near the limiting groove. A telescopic hose is fixedly connected to one end of the outer wall of the liquid storage chamber, and the end of the telescopic hose is fixedly connected to the input end of the spray gun.

[0018] A further improvement of the technical solution of the present invention is that: a blower is fixedly connected to the end of the inner wall of the processing chamber away from the guide chamber, and an air inlet pipe is fixedly connected to the input end of the blower. The outer wall of the air inlet pipe penetrates and is fixedly connected to the outer wall of the preparation body. Several air guide pipes are fixedly connected to the output end of the blower, and an exhaust fan is fixedly connected to the end of each of the several air guide pipes. The outer wall of the exhaust fan is fixedly connected to the side of the outer wall of the support plate away from the limiting groove.

[0019] An operating method for a filling material preparation device for displacement filling coal mining, wherein the method employs the aforementioned filling material preparation device for displacement filling coal mining, as described below.

[0020] S1: After preliminary crushing and heavy metal reduction treatment of coal gangue, the coal gangue enters the screening chamber through the feed pipe set at one end of the preparation body. The coal gangue is screened by an electrically controlled high-frequency screen, and the larger coal gangue is finely crushed in a suspension roller mill. Then, the electrically controlled valve is activated to quantitatively discharge the coal gangue particles into the treatment chamber, and the treatment components perform secondary heavy metal reduction treatment on the coal gangue particles.

[0021] S2: The processing unit discharges coal gangue particles into the glass tube in a quantitative manner through an electronically controlled valve. The drive motor drives the worm gear through the drive rod, which in turn drives the worm wheel and the discharge roller to rotate. During this process, a stabilizer is sprayed out using a spray gun. Combined with the stirring of the mixing frame, the coal gangue particles in the glass tube are fully soaked in the stabilizer. After the discharge roller rotates 180 degrees, the particles fall into the bottom of the processing chamber.

[0022] S3: Coal gangue particles are discharged through the discharge pipe set at the bottom of one side of the outer wall of the main body. Then, the processed coal gangue particles are collected and stirred using a mixer with coal gangue particles as the main raw material. During this process, a curing agent is added and stirred. Then, auxiliary materials are added again to form coal mine cemented filling slurry. Then, the coal mine cemented filling slurry is discharged into the coal mine goaf area using a liquid injection device to fill the coal mine goaf area.

[0023] Due to the adoption of the above technical solution, the present invention has achieved the following technical progress compared with the prior art.

[0024] 1. This invention provides a device for preparing backfill material for displacement backfilling coal mining and its operating method. By starting the spray gun, the stabilizer enters the spray gun through a telescopic hose installed at one end of the outer wall of the storage tank, and is sprayed into the receiving trough along with the spray gun, covering the coal gangue particles rich in heavy metals in the glass tube. This further solves the problem that in the traditional device for preparing backfill material for displacement backfilling coal mining, some incompletely eliminated heavy metal ions are easily mixed in the fine coal gangue particles, resulting in the inability to specifically strengthen and stabilize heavy metals after screening, and the potential for secondary heavy metal leaching.

[0025] 2. This invention provides a device for preparing backfill material for replacement backfilling in coal mining and its operating method. A semi-circular internal gear ring is installed at the top of the extension plate, and this ring is located within the inner cavity of the jacket. After the spray gun has completely impregnated the heavy metal coal gangue particles in the receiving trough, the jacket, along with the rotation of the discharge roller, drives the linkage gear on the outer wall of the linkage rod to rotate within the semi-circular internal gear ring. This, in turn, causes the rotating linkage rod to drive the stirring frame, stirring the coal gangue particles in the glass tube. This further solves the problem that in traditional replacement backfilling coal mining backfill material preparation devices, the limited range of stabilizer spraying results in some heavy metal coal gangue particles not being completely impregnated by the stabilizer, leading to heavy metal leakage and pollution of groundwater and soil even after the coal gangue particles are processed into coal mine cemented backfill slurry. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the structure of the present invention.

[0027] Figure 2 is a cross-sectional structural diagram of the present invention.

[0028] Figure 3 is a schematic diagram of the processing chamber structure of the present invention.

[0029] Figure 4 is a schematic diagram of the blower structure of the present invention.

[0030] Figure 5 is a schematic diagram of the support plate structure of the present invention.

[0031] Figure 6 is a schematic diagram of the cross-sectional structure of the discharge roller of the present invention.

[0032] Figure 7 is a schematic diagram of the jacket unfolding structure of the present invention.

[0033] Figure 8 is a schematic diagram of the unfolded structure of the stirring rack of the present invention.

[0034] Figure 9 is a schematic diagram of the internal structure of the discharge roller of the present invention.

[0035] Figure 10 is an enlarged structural diagram of point A in Figure 6 of the present invention.

[0036] Figure 11 is an enlarged structural diagram of point B in Figure 9 of the present invention.

[0037] In the diagram: 1. Preparation body; 2. Feed pipe; 3. Discharge pipe; 4. Cover; 5. Screening chamber; 6. Processing chamber; 7. Partition; 8. Inclined plate; 9. Discharge port; 10. Electrically controlled high-frequency screen; 11. Suspension roller mill; 12. Support rod; 13. Worm gear; 14. Jacket; 15. Discharge roller; 16. Support platform; 17. Metal detector; 18. Limiting plate; 19. Receiving trough; 20. Glass tube; 21. Limiting block; 22. Extension plate; 23. Semi-circular internal gear ring; 4. Linkage rod; 25. Linkage gear; 26. Stirring frame; 27. Support plate; 28. Drive motor; 29. ​​Drive rod; 30. Worm gear; 31. Support ring; 32. Limiting frame; 33. Electric control valve; 34. Support plate; 35. Limiting groove; 36. Electric control screw; 37. Spray gun; 38. Flow guide chamber; 39. Liquid inlet pipe; 40. Flow guide pipe; 41. Liquid storage tank; 42. Telescopic hose; 43. Blower; 44. Air inlet pipe; 45. Air guide pipe; 46. Exhaust fan. Detailed Implementation

[0038] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0039] As shown in Figures 1 to 11, the filling material preparation device for replacement filling coal mining according to an embodiment of the present invention includes a preparation body 1. A feed pipe 2 is fixedly connected to one end of the top of the preparation body 1, and a discharge pipe 3 is fixedly connected to the bottom of one side of the outer wall of the preparation body 1. Several symmetrically arranged caps 4 are threadedly connected to the side of the outer wall of the preparation body 1 near the discharge pipe 3. A screening chamber 5 is opened at the top of the inner cavity of the preparation body 1, and a processing chamber 6 is opened at the bottom of the inner cavity of the preparation body 1. A processing component is provided on the inner wall of the processing chamber 6. A partition 7 is fixedly connected to one end of the top of the inner wall of the screening chamber 5, and an inclined plate 8 is fixedly connected to the bottom of one side of the inner wall of the screening chamber 5. A discharge port 9 is opened at one end of the outer wall of the partition 7, and a component is fixedly connected to the side of the outer wall of the partition 7 near the discharge port 9. An electrically controlled high-frequency screen 10 is provided, and a suspension roller mill 11 is fixedly connected to the side of the outer wall of the partition 7 away from the electrically controlled high-frequency screen 10. The processing assembly includes several mutually symmetrical support rods 12 rotatably connected to one side of the inner wall of the processing chamber 6. A worm gear 13 is fixedly connected to one end of the outer wall of each of the support rods 12. A jacket 14 is fixedly connected to the end of the outer wall of the support rod 12 away from the worm gear 13. A discharge roller 15 is fixedly connected to one end of the outer wall of the jacket 14. A support platform 16 is rotatably connected to the bottom of one side of the outer wall of the jacket 14. A metal detector 17 is fixedly connected to the top of the support platform 16. A limiting plate 18 is fixedly connected to the end of the support platform 16. The outer wall of the limiting plate 18 is rotatably connected to the inner wall of the discharge roller 15. One side of the outer wall of the limiting plate 18 is engaged with the outer wall of the cover 4.

[0040] During operation, a feed pipe 2 is installed at one end of the top of the preparation body 1. The feed pipe 2 then feeds the coal gangue, after heavy metal removal and crushing, into the screening chamber 5 located at the top of the inner cavity of the preparation body 1. The coal gangue falls onto the surface of an electrically controlled high-frequency screen 10 (composed of a motor, cam, and other components, representing existing technology) located on one side of the inner wall of the screening chamber 5. The electrically controlled high-frequency screen 10 is activated to screen the coal gangue on the surface, allowing the coal gangue particles to pass through and fall onto an inclined plate 8 located at the bottom of one side of the inner wall of the screening chamber 5. Larger pieces of coal gangue, due to the vibration of the electrically controlled high-frequency screen 10, move towards the baffle 7 located at the top end of the inner wall of the screening chamber 5. The direction of movement is achieved by setting a discharge port 9 at one end of the outer wall of the partition plate 7, allowing coal gangue to pass through the discharge port 9 and fall into the suspension roller mill 11 (here, the suspension roller mill 11 is a device specifically used to process ore into uniform powder, with a grinding particle size generally between 80 and 325 mesh. Through the relative crushing and grinding of the grinding roller and the grinding ring, the coal gangue is further crushed, which belongs to the prior art) on the outer wall of the partition plate 7 away from the electric high frequency screen 10. The crushed coal gangue particles fall into the inclined plate 8. Since there are several mutually symmetrical electric control valves 33 at the bottom of the inclined plate 8, the electric control valves 33 are used to quantitatively discharge the coal gangue particles accumulated on the surface of the inclined plate 8.

[0041] It should be further explained that the coal gangue particles are quantitatively discharged through the electronically controlled valve 33 and enter the receiving trough 19 set on the surface of the discharge roller 15. At this time, the transmission motor 28 set on one side of the outer wall of the preparation body 1 is started, which drives the worm gear 30 to rotate through the transmission rod 29 set on the output end. Since one end of the outer wall of the support rod 12 is equipped with a worm wheel 13, the worm gear 30 drives the jacket 14 and the discharge roller 15 to rotate 30 degrees clockwise through the worm wheel 13, so that the receiving trough 19 containing the coal gangue particles coincides with the spray path of the spray gun 37. Then, the spray gun 37 is started to spray the stabilizer in the storage tank 41 into the receiving trough 19, and the stabilizer adheres to the surface of the coal gangue particles, reducing the concentration of heavy metals in the coal gangue particles and preventing heavy metals from overflowing and causing pollution to groundwater and soil.

[0042] It needs to be reiterated that as the discharge roller 15 continues to rotate, the coal gangue particles in the receiving trough 19 fall into the bottom of the processing chamber 6 under the action of gravity. After the coal gangue particles have been processed, the operator inserts the cleaning plate (here, the cleaning plate is a T-shaped tool used to clean residual materials inside the device, consisting of a long and flat plate and a holding rod, which is existing technology) through the discharge pipe 3, and then pulls the cleaning plate to discharge the coal gangue particles through the discharge pipe 3. After the particles are collected, a mixer is used to mix coal gangue, fly ash and other coal-based solid waste as the main raw materials. During this process, cement or slag powder and other solidifying agents are added and mixed. Then, auxiliary materials such as glass fiber, retarders and accelerators are added to form coal mine cemented filling slurry. Then, the coal mine cemented filling slurry is discharged into the coal mine goaf area using a liquid injection device to fill the goaf area, thereby eliminating the need for traditional protective coal pillars in the area and further reducing the waste of coal resources.

[0043] The outer wall of the discharge roller 15 is provided with several symmetrically arranged receiving grooves 19, and the inner walls of the receiving grooves 19 are slidably connected to glass tubes 20. The ends of the glass tubes 20 are fixedly connected to limit blocks 21. One end of the bottom of the processing chamber 6 is fixedly connected to an extension plate 22, and the top of the extension plate 22 is fixedly connected to a semi-circular internal gear ring 23. The outer wall of the semi-circular internal gear ring 23 is slidably connected to the inner cavity of the jacket 14. The inner cavity of the jacket 14 is rotatably connected to several linkage rods 24, and the outer walls of the linkage rods 24 are fixedly connected to linkage gears 25. The outer walls of the linkage gears 25 mesh with the inner walls of the semi-circular internal gear ring 23. The ends of the linkage rods 24 are fixedly connected to a stirring frame 26, and the ends of the stirring frame 26 are fixedly connected to a support. A support plate 27 is provided, and its outer wall is rotatably connected to the inner wall of the glass tube 20. A drive motor 28 is fixedly connected to one side of the outer wall of the preparation body 1, and a drive rod 29 is fixedly connected to the output end of the drive motor 28. The outer wall of the drive rod 29 penetrates and is rotatably connected to the outer wall of the preparation body 1. A worm gear 30 is fixedly connected to the end of the drive rod 29, and the end of the worm gear 30 is rotatably connected to the inner wall of the processing chamber 6. The outer wall of the worm gear 30 meshes with the top of the worm wheel 13. Support rings 31 are fixedly connected to both ends of the outer wall of the discharge roller 15, and a limit frame 32 is rotatably connected to the outer wall of the support ring 31. The top of the limit frame 32 is fixedly connected to the bottom of the inclined plate 8, and several phases are fixedly connected to the bottom of the inclined plate 8. Symmetrical electrically controlled valves 33 are arranged, and a support plate 34 is fixedly connected to the bottom of an inclined plate 8 located between several electrically controlled valves 33. A limit groove 35 is formed on one side of the outer wall of the support plate 34, and an electrically controlled lead screw 36 is rotatably connected to the inner wall of the limit groove 35. A spray gun 37 is threadedly connected to the outer wall of the electrically controlled lead screw 36, and one side of the outer wall of the spray gun 37 is slidably connected to the inner wall of the limit groove 35. A guide chamber 38 is fixedly connected to the top of one side of the inner wall of the processing chamber 6, and an inlet pipe 39 is fixedly connected to one side of the outer wall of the guide chamber 38. The outer wall of the inlet pipe 39 penetrates and is fixedly connected to the outer wall of the preparation body 1. Several guide pipes 40 are fixedly connected to the output end of the guide chamber 38, and a storage tank is fixedly connected to the end of each of the guide pipes 40. Liquid tank 41, and one side of the outer wall of liquid tank 41 is fixedly connected to the side of the outer wall of support plate 34 near the limiting groove 35. One end of the outer wall of liquid tank 41 is fixedly connected to a telescopic hose 42, and the end of the telescopic hose 42 is fixedly connected to the input end of spray gun 37. The end of the inner wall of treatment chamber 6 away from guide chamber 38 is fixedly connected to a blower 43, and the input end of blower 43 is fixedly connected to an air inlet pipe 44. The outer wall of air inlet pipe 44 penetrates and is fixedly connected to the outer wall of preparation body 1. The output end of blower 43 is fixedly connected to several air guide pipes 45, and the ends of several air guide pipes 45 are fixedly connected to exhaust fans 46. The outer wall of exhaust fans 46 is fixedly connected to the side of the outer wall of support plate 34 away from the limiting groove 35.

[0044] During operation, a processing chamber 6 is set at the bottom of the inner cavity of the preparation body 1, and a number of support rods 12 corresponding to the number of electrically controlled valves 33 are set on one side of the inner wall of the processing chamber 6. A sleeve 14 is set at the end of the support rod 12, and a discharge roller 15 is set at one end of the outer wall of the sleeve 14. Since both ends of the outer wall of the discharge roller 15 are provided with support rings 31, and the support rings 31 are located in several limiting frames 32 set at the bottom of the inclined plate 8, the limiting frames 32 support the weight of the discharge roller 15 and limit its movement. At this time, several caps 4 set on the outer wall of the preparation body 1 near the discharge pipe 3 are removed, so that the caps 4 are separated from the limiting plate 18 set at one end of the inner wall of the discharge pipe 3. Since several symmetrical receiving grooves are set on the surface of the discharge roller 15, 19. At this point, hold the limiting block 21 at the end of the glass tube 20 (the glass tube 20 is made of high-purity quartz glass, which is difficult to scratch when in long-term contact with coal gangue particles, does not react with the acidic or alkaline components in the coal gangue, and has extremely high light transmittance, completely not interfering with the X-ray penetration of the metal detection device), and feed the glass tube 20 into the receiving trough 19 until the outer wall of the limiting block 21 contacts the surface of the discharge roller 15. Then reinstall the cover 4 so that the cover 4 and the limiting plate 18 fit together. By setting a guide chamber 38 at the top of one side of the inner wall of the processing chamber 6, and setting an inlet pipe 39 on one side of the outer wall of the guide chamber 38, the stabilizer is injected into the guide chamber 38 through the inlet pipe 39. In the preparation process of the filling slurry, even if the coal gangue particles have undergone heavy metal reduction treatment, some heavy metal ions that have not been completely removed will still remain inside. To avoid problems such as uneven mixing and large fluctuations in fluidity of the slurry during the subsequent manufacturing process of the coal mine cemented filling slurry, the electric control valve 33 is activated to quantitatively discharge the coal gangue particles accumulated on the surface of the inclined plate 8 into the receiving trough 19 located at the top of the discharge roller 15. At this time, the coal gangue particles entering the receiving trough 19 are placed in the glass tube 20 in a flat state. Then, the drive motor 28 set on one side of the outer wall of the preparation body 1 is activated, so that it drives the worm gear 30 to rotate through the drive rod 29 set at the output end. Since one end of the outer wall of the support rod 12 is equipped with a worm wheel 13, the worm gear 30 is rotated. The rod 30 drives the jacket 14 and the discharge roller 15 to rotate 30 degrees clockwise via the worm gear 13, aligning the receiving trough 19 containing coal gangue particles with the spray path of the spray gun 37. A support platform 16 is provided at the bottom of one side of the outer wall of the jacket 14, and a metal detector 17 is provided at the top of the support platform 16 (here, the metal detector 17 is a device that emits focused high-energy X-rays, scans the surface of a single particle point by point, and excites heavy metal atoms to release characteristic fluorescent X-rays. The detector collects the fluorescence signal intensity at different locations and converts it into a heavy metal concentration distribution map, which can intuitively show the local enrichment area of ​​heavy metals on the particle surface). Since the output end of the metal detector 17 is facing the glass tube 20 containing coal gangue particles at this time,The metal detector 17 is activated to scan the coal gangue particles in the glass tube 20 and determine the distribution of heavy metal-containing coal gangue particles in the glass tube 20. At this time, the guide chamber 38 is activated, allowing the stabilizer to enter the storage tank 41 through the guide pipe 40 set at the output end of the guide chamber 38. Since the bottom of the inclined plate 8, which is located between several electrically controlled valves 33, is equipped with a support plate 34, the storage tank 41 is fixed by the support plate 34. A limiting groove 35 is set on one side of the outer wall of the support plate 34, and an electrically controlled lead screw 36 (which is composed of a motor and a lead screw, and is existing technology) is set on the inner wall of the limiting groove 35. The electrically controlled lead screw 36 drives the spray gun 37 set on the inner wall of the limiting groove 35 to move laterally along the trajectory of the limiting groove 35, and the output end of the spray gun 37 is aligned with the glass tube 2 in the receiving trough 19. The glass tube 20 contains coal gangue particles rich in heavy metals. Then, the spray gun 37 is activated, allowing stabilizer to enter the spray gun 37 through a telescopic hose 42 located at one end of the outer wall of the storage tank 41. The stabilizer is then sprayed into the receiving trough 19, covering the coal gangue particles rich in heavy metals. After the particles are impregnated with the stabilizer, the spray gun 37 is moved within the limiting groove 35 by the electric control screw 36 to the next location of coal gangue particles rich in heavy metals in the glass tube 20. This process is repeated to impregnate the coal gangue particles. This method further solves the problem that in traditional replacement backfilling coal mining raw material preparation devices, some incompletely eliminated heavy metal ions can easily remain mixed in the fine coal gangue particles, preventing targeted stabilization of heavy metals after screening and posing a risk of secondary heavy metal leaching.

[0045] It should be further explained that by setting several linkage rods 24 in the inner cavity of the jacket 14, and setting a stirring rack 26 at the end of the linkage rods 24 (the stirring rack 26 is made of polytetrafluoroethylene, which does not react chemically with the metal stabilizer and will not leave scratches on the surface when scraping the high-purity quartz glass tube 20, which is existing technology), and by setting a support plate 27 at the end of the stirring rack 26 (the support plate 27 is made of the same material as the stirring rack 26), the stirring rack 26 is kept horizontal inside the glass tube 20 with the support plate 27 as the support point. Since an extension plate 22 is set at one end of the bottom of the processing chamber 6, and a semi-circular internal gear ring 23 is set at the top of the extension plate 22, and the semi-circular internal gear ring 23 is located at... Within the inner cavity of the jacket 14, after the spray gun 37 has completely impregnated the heavy metal coal gangue particles in the glass tube 20, the jacket 14, along with the rotation of the discharge roller 15, drives the linkage gear 25 on the outer wall of the linkage rod 24 to rotate on the inner wall of the semi-circular internal gear ring 23. This causes the rotating linkage rod 24 to drive the stirring frame 26 to stir the coal gangue particles in the glass tube 20. This further solves the problem that in the traditional replacement filling coal mining raw material preparation device, due to the limited range of stabilizer spraying, some heavy metal coal gangue particles are not completely impregnated by the stabilizer, resulting in heavy metal leakage and pollution of groundwater and soil after the coal gangue particles are processed into coal mine cemented filling slurry.

[0046] It should be reiterated that when the discharge roller 15 rotates 180 degrees, under the influence of gravity and the continuously rotating agitator 26, the coal gangue particles fall sequentially into the bottom of the processing chamber 6. At this time, a blower 43 is installed at the end of the inner wall of the processing chamber 6 away from the guide chamber 38. The air is discharged into the exhaust fan 46 through the air inlet pipe 44 at the input end of the blower 43 and the air guide pipe 45 at the output end of the blower 43. The high-pressure air discharged by the exhaust fan 46 impacts the surface of the discharge roller 15. When the high-pressure air is blown into the receiving trough 19, the glass tube 20 has a smooth curvature. When the high-pressure air blows onto the surface of the glass tube 20, it carries away the residual coal gangue dust and stabilizer droplets, thereby achieving the purpose of cleaning the glass tube 20.

[0047] An operating method for a filling material preparation device for displacement filling coal mining, wherein the method employs the aforementioned filling material preparation device for displacement filling coal mining, as described below.

[0048] S1: After preliminary crushing and heavy metal reduction treatment of coal gangue, the coal gangue enters the screening chamber 5 through the feed pipe 2 set at one end of the top of the preparation body 1. The coal gangue is screened by the electrically controlled high-frequency screen 10, and the larger coal gangue enters the suspension roller mill 11 for fine crushing. Then, the electrically controlled valve 33 is activated to quantitatively discharge the coal gangue particles into the treatment chamber 6, and the treatment components carry out secondary heavy metal reduction treatment on the coal gangue particles.

[0049] S2: The processing component discharges coal gangue particles into the glass tube 20 in a quantitative manner through the electronically controlled valve 33. The drive motor 28 drives the worm gear 30 through the drive rod 29, which in turn drives the worm wheel 13 and the discharge roller 15 to rotate. During this period, the stabilizer is sprayed out by the spray gun 37. With the stirring of the stirring frame 26, the coal gangue particles in the glass tube 20 are fully soaked in the stabilizer. After the discharge roller 15 rotates 180 degrees, the particles fall into the bottom of the processing chamber 6.

[0050] S3: Through the discharge pipe 3 set at the bottom of one side of the outer wall of the main body 1, the coal gangue particles are discharged. Then, the processed coal gangue particles are collected and stirred with coal gangue, fly ash and other coal-based solid waste as the main raw materials using a mixer. During this process, cement or slag powder and other solidifying agents are added and stirred. Then, auxiliary materials such as glass fiber, retarder and accelerator are added to form coal mine cemented filling slurry. Then, the coal mine cemented filling slurry is discharged into the coal mine goaf area using a liquid injection device to fill the coal mine goaf area.

[0051] The working principle of the replacement and backfilling coal mining raw material preparation device and its operation method will be explained in detail below.

[0052] As shown in Figures 1 to 11, a feed pipe 2 is installed at one end of the top of the preparation body 1. The feed pipe 2 is used to feed the coal gangue, after heavy metal reduction and crushing, into the screening chamber 5 located at the top of the inner cavity of the preparation body 1. The coal gangue falls onto the surface of an electrically controlled high-frequency screen 10 (composed of a motor, cam, and other components, belonging to existing technology) located on one side of the inner wall of the screening chamber 5. The electrically controlled high-frequency screen 10 is activated to screen the coal gangue on the surface, allowing the coal gangue particles to pass through the screen and fall onto an inclined plate 8 located at the bottom of one side of the inner wall of the screening chamber 5. Larger pieces of coal gangue move towards the partition plate 7 located at the top end of the inner wall of the screening chamber 5 as the electrically controlled high-frequency screen 10 vibrates. The particles are then filtered by the inclined plate 8 located on the outer wall of the partition plate 7. A discharge port 9 is provided at one end, allowing coal gangue to fall through the discharge port 9 into a suspended roller mill 11 (here, the suspended roller mill 11 is a device specifically designed to process ore into uniform powder, with a grinding particle size generally between 80 and 325 mesh. Through the relative crushing and grinding of the grinding rollers and grinding rings, the coal gangue is further pulverized; this is existing technology) located on the outer wall of the partition plate 7 away from the electrically controlled high-frequency screen 10. The pulverized coal gangue particles fall into the inclined plate 8. Since several symmetrically arranged electrically controlled valves 33 are provided at the bottom of the inclined plate 8, the electrically controlled valves 33 are used to quantitatively discharge the coal gangue particles accumulated on the surface of the inclined plate 8. The coal gangue particles are quantitatively discharged through the electrically controlled valves 33 and then enter the receiving area set on the surface of the discharge roller 15. In the trough 19, the drive motor 28, located on one side of the outer wall of the preparation body 1, is activated, causing it to drive the worm gear 30 to rotate via the drive rod 29 at its output end. Since one end of the outer wall of the support rod 12 is equipped with a worm wheel 13, the worm gear 30 drives the jacket 14 and the discharge roller 15 to rotate 30 degrees clockwise via the worm wheel 13, aligning the receiving trough 19 containing coal gangue particles with the spray path of the spray gun 37. Then, the spray gun 37 is activated, spraying the stabilizer from the storage tank 41 into the receiving trough 19, allowing the stabilizer to adhere to the surface of the coal gangue particles, reducing the concentration of heavy metals in the particles and preventing heavy metal spillage that could pollute groundwater and soil. As the discharge roller 15 continues to rotate, the particles in the receiving trough 19... Under the influence of gravity, the coal gangue particles fall to the bottom of the processing chamber 6. After the coal gangue particles are processed, the operator extends the cleaning plate through the discharge pipe 3 and then pulls the cleaning plate to discharge the coal gangue particles through the discharge pipe 3. After the coal gangue particles are collected, a mixer is used to mix coal gangue, fly ash and other coal-based solid waste as the main raw materials. During this process, cement or slag powder and other solidifying agents are added and mixed. Then, auxiliary materials such as glass fiber, retarders and accelerators are added to form coal mine cemented filling slurry. Then, the coal mine cemented filling slurry is discharged into the coal mine goaf area using a liquid injection device to fill the goaf area, thereby eliminating the traditional protective coal pillar and further reducing the waste of coal resources.

[0053] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A device for preparing backfill material for displacement backfilling coal mining, comprising a preparation body (1), characterized in that: The top end of the preparation body (1) is fixedly connected to a feed pipe (2), and the bottom of one side of the outer wall of the preparation body (1) is fixedly connected to a discharge pipe (3). Several symmetrical caps (4) are threadedly connected to the outer wall of the preparation body (1) near the discharge pipe (3). A screening chamber (5) is opened at the top of the inner cavity of the preparation body (1), and a processing chamber (6) is opened at the bottom of the inner cavity of the preparation body (1). A processing component is provided on the inner wall of the processing chamber (6). A partition (7) is fixedly connected to one end of the top of the inner wall of the screening chamber (5), and a partition (7) is fixedly connected to the inner wall of the screening chamber (5). An inclined plate (8) is fixedly connected to the bottom of the side. A discharge port (9) is opened at one end of the outer wall of the partition (7). An electrically controlled high-frequency screen (10) is fixedly connected to the side of the outer wall of the partition (7) near the discharge port (9), while a suspension roller mill (11) is fixedly connected to the side of the outer wall of the partition (7) away from the electrically controlled high-frequency screen (10). The processing assembly includes several mutually symmetrical support rods (12) rotatably connected to one side of the inner wall of the processing chamber (6). A worm gear (13) is fixedly connected to one end of the outer wall of each of the support rods (12), while a worm gear (13) is fixedly connected to the side of the outer wall of the support rods (12) away from the worm gear (11). 3) One end is fixedly connected to a sleeve (14), one end of the outer wall of the sleeve (14) is fixedly connected to a discharge roller (15), and a support platform (16) is rotatably connected to the bottom of one side of the outer wall of the sleeve (14), and a metal detector (17) is fixedly connected to the top of the support platform (16). A limiting disk (18) is fixedly connected to the end of the support platform (16), and the outer wall of the limiting disk (18) is rotatably connected to the inner wall of the discharge roller (15), and one side of the outer wall of the limiting disk (18) is engaged with the outer wall of the cover (4); the outer wall of the discharge roller (15) has several mutually opposing openings. The receiving trough (19) is called a receiving trough, and the inner wall of several receiving troughs (19) is slidably connected to a glass tube (20), and the end of the glass tube (20) is fixedly connected to a limiting block (21); a limiting groove (35) is opened on one side of the outer wall of the support plate (34), and an electric control screw (36) is rotatably connected to the inner wall of the limiting groove (35). The outer wall of the electric control screw (36) is threadedly connected to a spray gun (37), and one side of the outer wall of the spray gun (37) is slidably connected to the inner wall of the limiting groove (35); the spray gun (37) is used to spray stabilizer onto the raw material at a specified position in the receiving trough (19).

2. The device for preparing backfill material for replacement backfilling coal mining according to claim 1, characterized in that: An extension plate (22) is fixedly connected to one end of the bottom of the processing chamber (6), and a semi-circular internal gear ring (23) is fixedly connected to the top of the extension plate (22). The outer wall of the semi-circular internal gear ring (23) is slidably connected to the inner cavity of the jacket (14). A number of linkage rods (24) are rotatably connected to the inner cavity of the jacket (14), and a linkage gear (25) is fixedly connected to the outer wall of each linkage rod (24). The outer wall of the linkage gear (25) meshes with the inner wall of the semi-circular internal gear ring (23), and a stirring rack (26) is fixedly connected to the end of the linkage rod (24). A support plate (27) is fixedly connected to the end of the stirring rack (26), and the outer wall of the support plate (27) is rotatably connected to the inner wall of the glass tube (20).

3. The device for preparing backfill material for replacement backfilling coal mining according to claim 2, characterized in that: A drive motor (28) is fixedly connected to one side of the outer wall of the preparation body (1), and a drive rod (29) is fixedly connected to the output end of the drive motor (28). The outer wall of the drive rod (29) penetrates and is rotatably connected to the outer wall of the preparation body (1). A worm (30) is fixedly connected to the end of the drive rod (29), and the end of the worm (30) is rotatably connected to the inner wall of the processing chamber (6). The outer wall of the worm (30) meshes with the top of the worm wheel (13).

4. The device for preparing backfill material for replacement backfilling coal mining according to claim 3, characterized in that: Both ends of the outer wall of the discharge roller (15) are fixedly connected to support rings (31), and the outer wall of the support ring (31) is rotatably connected to a limit frame (32). The top of the limit frame (32) is fixedly connected to the bottom of the inclined plate (8). The bottom of the inclined plate (8) is fixedly connected to several mutually symmetrical electric control valves (33), and the bottom of the inclined plate (8) between the several electric control valves (33) is fixedly connected to a support plate (34).

5. The apparatus for preparing backfill material for replacement backfilling coal mining according to claim 4, characterized in that: A flow guide chamber (38) is fixedly connected to the top of one side of the inner wall of the processing chamber (6), and an inlet pipe (39) is fixedly connected to one side of the outer wall of the flow guide chamber (38). The outer wall of the inlet pipe (39) penetrates and is fixedly connected to the outer wall of the preparation body (1). Several flow guide pipes (40) are fixedly connected to the output end of the flow guide chamber (38), and a liquid storage chamber (41) is fixedly connected to the end of each of the flow guide pipes (40). One side of the outer wall of the liquid storage chamber (41) is fixedly connected to the side of the outer wall of the support plate (34) near the limiting groove (35). One end of the outer wall of the liquid storage chamber (41) is fixedly connected to a telescopic hose (42), and the end of the telescopic hose (42) is fixedly connected to the input end of the spray gun (37).

6. The apparatus for preparing backfill material for replacement backfilling coal mining according to claim 5, characterized in that: A blower (43) is fixedly connected to one end of the inner wall of the processing chamber (6) away from the guide chamber (38), and an air inlet pipe (44) is fixedly connected to the input end of the blower (43). The outer wall of the air inlet pipe (44) penetrates and is fixedly connected to the outer wall of the preparation body (1). Several air guide pipes (45) are fixedly connected to the output end of the blower (43), and an exhaust fan (46) is fixedly connected to the end of each of the several air guide pipes (45). The outer wall of the exhaust fan (46) is fixedly connected to the side of the outer wall of the support plate (34) away from the limiting groove (35).

7. An operating method for a filling material preparation device for displacement backfilling coal mining, wherein the method employs the filling material preparation device for displacement backfilling coal mining as described in claim 6, characterized in that: The method is as follows: S1: After preliminary crushing and heavy metal reduction treatment of coal gangue, the coal gangue enters the screening chamber (5) through the feed pipe (2) set at the top end of the preparation body (1). The coal gangue is screened by an electrically controlled high-frequency screen (10), and the large pieces of coal gangue are finely crushed in the suspension roller mill (11). Then, the electrically controlled valve (33) is started to quantitatively discharge the coal gangue particles into the treatment chamber (6) and the treatment component is used to perform secondary heavy metal reduction treatment on the coal gangue particles; S2: The treatment component quantitatively discharges the coal gangue particles into the glass tube (20) through the electrically controlled valve (33). The drive motor (28) drives the worm gear (30) through the drive rod (29), so that the worm gear (30) drives the worm wheel (13). The discharge roller (15) rotates, and during this period, the stabilizer is sprayed out using the spray gun (37). With the stirring of the stirring frame (26), the coal gangue particles in the glass tube (20) are fully soaked in the stabilizer. After the discharge roller (15) rotates 180 degrees, they fall into the bottom of the processing chamber (6). S3: The coal gangue particles are discharged through the discharge pipe (3) set at the bottom of one side of the outer wall of the preparation body (1). Then the processed coal gangue particles are collected and stirred using the coal gangue particles as raw material using a mixer. During this period, a curing agent is added and stirred. Then auxiliary materials are added again to form coal mine cemented filling slurry. Then the coal mine cemented filling slurry is discharged into the coal mine goaf area using the injection equipment and the coal mine goaf area is filled.

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