Underground sealed pipeline type moving bed and mounting method

Abstract

The invention discloses an underground sealed pipeline type moving bed and a mounting method, and relates to the technical field of uranium ore hydrometallurgy. The underground sealed pipeline type moving bed comprises a sealed material storage tank, middle double pipes and a lower liquid inlet tank which are sequentially connected from top to bottom, a resin falling opening is formed in the bottom of the sealed storage tank; the middle double pipe comprises an outer pipe and an inner pipe which is centrally and fixedly mounted in the outer pipe; a ring column interlayer for accommodating resin microspheres is formed between the inner tube and the outer tube; the outer pipe comprises a blanking pipe, a conical pipe and a soaking pipe; the upper end opening of the blanking pipe is fixedly connected with the resin falling opening; the inner pipe comprises a butt joint pipe, a liquid feeding pipe and a screen pipe; a butt joint opening is formed in the upper end of the lower liquid inlet tank, and the butt joint opening of the lower liquid inlet tank is fixedly connected with a lower end opening of the material soaking pipe. A moving bed underground ore body in-situ installation method is applied to an underground sealed pipeline type moving bed. The device has the advantages that all the components are modular components, assembling is easy, transportation is convenient, and the installation requirement in a narrow underground ore body channel system can be met by matching with a specific installation method.

Description

Technical Field

[0001] The invention relates to the technical field of uranium hydrometallurgy, in particular to underground in-situ adsorption treatment equipment for leachate in an in-situ blasting leaching process, in particular to an underground sealed pipeline type moving bed and an installation method thereof. Background Art

[0002] The in-situ blasting leaching process is the current mainstream mining technology for low-grade uranium ores. The core operation is to carry out in-situ blasting on the underground ore body to break the ore body into an in-situ crushed ore pile with a certain size. The leaching liquid is then sprayed into the in-situ crushed ore pile to selectively dissolve the uranium minerals to obtain a leaching solution (rich liquid) containing uranyl complexes. Finally, the rich liquid is pumped back to the surface for recovery.

[0003] The in-situ blasting and leaching process relies heavily on a channel system within the underground ore body to transport liquid. This channel system includes a vertical shaft and multiple horizontal tunnels. All horizontal tunnels extend in the same direction and face each other vertically. One end of each horizontal tunnel connects to different depths in the vertical shaft, and the other end of each horizontal tunnel connects to a corresponding mining layer. Within the underground ore body, the area between any two horizontal tunnels, the ore body area above the topmost horizontal tunnel, or the ore body area below the bottommost horizontal tunnel are all mining layers, thus forming multiple mining layers separated from top to bottom by different horizontal tunnels.

[0004] A supporting ion exchange moving bed and leachate preparation device are required on the surface of the mining area. The leachate is prepared in the leachate preparation device and pumped underground through pipes buried in vertical shafts and horizontal tunnels. It is then evenly sprayed onto the in-situ crushed ore pile, selectively dissolving the uranium minerals and producing a leachate (rich solution) containing uranyl complexes. This leachate (rich solution) is then pumped back to the surface through pipes buried in the vertical shafts and horizontal tunnels and fed into the moving bed for adsorption and enrichment of the uranyl complexes. The moving bed absorbs the uranyl complexes from the rich solution through the resin microspheres (based on an ion exchange process) within its cavity. Saturated resin microspheres (i.e., those that have reached their maximum adsorption capacity) are discharged from the bottom of the moving bed, and barren solution (derived from the depletion of the rich solution) is discharged from the middle or upper portion of the moving bed. The saturated resin microspheres are then acid-eluted and desorbed to produce regenerated barren resin and qualified leaching solution. The barren solution is then acid-adjusted to produce the leachate used for spraying the in-situ crushed ore pile.

[0005] The traditional in-situ blasting leaching process has the following shortcomings: 1. High environmental safety risk: The pipelines for transporting leachate (rich liquid) and leaching liquid over long distances can reach hundreds of meters in total length, and the risk of leakage is relatively high. If leakage occurs, it will pollute surface water and soil.

[0006] 2. High energy consumption and time cost: after the leaching solution is prepared on the ground, it is sent to the in-situ broken ore heap underground, and the rich solution leached from the in-situ broken ore heap needs to be pumped to the ground for treatment, the liquid conveying path is long, and the energy consumption and time cost are superimposed.

[0007] 3. There is a risk of surface exposure: although underground mining has been popular, the ion exchange adsorption process still relies on surface facilities, the so-called 'underground' is limited to the mining link, and the pumping of the rich solution leached from the ore body to the surface will form an irremovable surface signal source; in addition, the large adsorption tower group (height > 15m) on the ground will form a unique geometric feature of the heat source shape, which is easy to be recognized by multispectral satellite; and the periodic heat trajectory generated by the surface pipeline network is easy to expose the production scale and process route; finally, the surface fixed facilities are easy to become the first round of attack targets in conflicts. SUMMARY

[0008] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide an underground sealed pipeline type moving bed and installation method, which solves the problems of long liquid conveying path, relatively high leakage risk, superimposed energy consumption and time cost, and surface exposure risk in the traditional in-situ blasting leaching process.

[0009] The technical scheme of the present application is: an underground sealed pipeline type moving bed is installed in an underground ore body; it comprises a sealed storage tank, a middle double pipe and a lower liquid inlet tank connected in sequence from top to bottom; The sealed storage tank is internally provided with an inner cavity A, and the top of the sealed storage tank is provided with an atmospheric communication port, a compressed air injection port and a sealed feeder; the atmospheric communication port and the compressed air injection port are in a sealed and closed state; a lean liquid discharge pipe is sealingly installed on the side wall or top wall of the sealed storage tank, and the bottom of the sealed storage tank is provided with a resin falling port; The middle double pipe comprises an outer pipe and an inner pipe fixedly installed in the inner pipe; the inner pipe and the outer pipe form an annular column interlayer for containing resin microspheres, and the upper end of the annular column interlayer is communicated with the resin falling port; the outer pipe comprises a falling pipe, a conical pipe and a leaching pipe connected in sequence from top to bottom; the upper end of the falling pipe is fixedly connected with the resin falling port; the inner pipe comprises a butt joint pipe, a liquid feeding pipe and a screen pipe connected in sequence from top to bottom; the liquid feeding pipe is installed in the inner hole of the falling pipe, the annular column interlayer is located between the outer circular face of the liquid feeding pipe and the inner hole wall of the falling pipe, the screen pipe is threadedly connected at the lower end of the liquid feeding pipe, the outer circular face of the screen pipe is provided with water permeable holes with a size smaller than that of the resin microspheres, and the upper and lower end faces of the screen pipe do not exceed the upper and lower end faces of the leaching pipe, respectively; the two ends of the butt joint pipe are sealingly connected with the inner end port of the lean liquid discharge pipe and the upper end port of the liquid feeding pipe, respectively; The lower liquid inlet tank is internally provided with an inner cavity B, the upper end of the lower liquid inlet tank is provided with a butt joint port, the bottom of the lower liquid inlet tank is provided with a saturated resin outlet, and the side wall of the lower liquid inlet tank is provided with a rich liquid input pipe; the butt joint port of the lower liquid inlet tank is fixedly connected with the lower end port of the leaching pipe.

[0010] A further technical solution of the present invention is as follows: a channel system is provided in the underground ore body, the channel system comprising a vertical shaft and a plurality of horizontal tunnels excavated in the horizontal direction; all the horizontal tunnels extend in the same direction and face each other vertically, the front ends of the horizontal tunnels are connected to different depths of the vertical shafts; the ore body area between the rear ends of any two horizontal tunnels is a mining layer, thereby forming multiple mining layers separated from top to bottom by different horizontal tunnels, and the mining layers are blasted to form an in-situ crushed ore pile; A mounting channel is drilled in the vertical direction between the middle sections of any two adjacent horizontal lanes, the mounting channel comprising an upper mounting hole and a lower mounting hole connected in sequence, the cross-sectional area of ​​the lower mounting hole being larger than the cross-sectional area of ​​the upper mounting hole; The underground sealed pipe-type moving bed is fixedly installed in the target installation channel and two horizontal tunnels connected to its upper and lower ends; wherein, the outer pipe is vertically fixedly installed in the target installation channel through a casting process, the upper end of the outer pipe extends out of the horizontal tunnel connected to the upper end of the target installation channel, and the lower end of the outer pipe extends out of the horizontal tunnel connected to the lower end of the target installation channel; wherein, the sealed storage tank is installed in the horizontal tunnel connected to the upper end of the target installation channel; wherein, the lower liquid inlet tank is installed in the horizontal tunnel connected to the lower end of the target installation channel.

[0011] A further technical solution of the present invention is: the length of the screen tube is 1-4m, the outer diameter of the screen tube is 75-85mm, and the inner diameter of the immersion tube is 390-410mm.

[0012] A further technical solution of the present invention is: the length of the screen tube is 2.5m, the outer diameter of the screen tube is 80mm, and the inner diameter of the immersion tube is 400mm.

[0013] A further technical solution of the present invention is that the blanking pipe is formed by threading a plurality of short blanking pipes with lengths between 0.8 and 1.2 m in sequence, and the length of the blanking pipe exceeds the length of the upper mounting hole by 0.2 to 0.5 m.

[0014] A further technical solution of the present invention is that the liquid feeding pipe is formed by threading multiple liquid feeding short pipes with a length of 0.8-1.2m in sequence, and the upper end of the uppermost liquid feeding short pipe exceeds the height of the upper end of the blanking pipe by 0.1-0.2m.

[0015] A further technical solution of the present invention is that: a plurality of axial strip grooves extending axially are provided at the opening of the lower end of the immersion tube, and the upper end of each axial strip groove is connected to a circumferential arc groove arranged circumferentially; a plurality of axial mounting grooves extending axially are provided in the inner hole of each blanking short tube, and the direction of the axial mounting grooves extends from the upper end to the lower end of the blanking short tube, but does not pass through to the lower end of the blanking short tube; The inner tube is fixedly mounted in the inner hole of the outer tube through a positioning assembly; the positioning assembly includes an end support plate and multiple centering positioning plates; the end support plate is fixedly mounted in the inner hole of the immersion tube, and the centering positioning plate is mounted in the inner hole of the blanking short tube; The end face supporting plate includes a central plate and a plurality of supporting leg plates A connected to the outer side of the central plate, and a fan-shaped hollow is formed between two adjacent supporting leg plates A for the passage of resin microspheres, and the number of supporting leg plates A is consistent with the number of axial strip grooves and corresponds one to one, and the number of supporting leg plates A is consistent with the number of circumferential arc grooves and corresponds one to one; the end face supporting plate is slid from the lower end opening of the immersion tube into the inner hole of the immersion tube through the sliding cooperation relationship between the supporting leg plates A and the axial strip grooves of the immersion tube. When the end face supporting plate is advanced to the intersection of the axial positioning groove and the circumferential arc groove of the immersion tube, the end face supporting plate is rotated so that the supporting leg plates A on the end face supporting plate enter the corresponding circumferential arc groove in the inner hole of the immersion tube, thereby realizing the fixed installation of the end face supporting plate in the inner hole of the immersion tube; The number of centering positioning plates is consistent with the number of short blanking tubes in the blanking tube and corresponds one to one. The centering positioning plate includes an annular plate and multiple support leg plates B connected to the outside of the annular plate. A fan-shaped hollow is formed between two adjacent support leg plates B402 for the resin microspheres to pass through. A through-hole B is provided at the center of the annular plate for the liquid supply short tube to slide through. A circle of chamfers is provided at the upper end of the through-hole B to guide the pipe docking and insertion; the centering positioning plate is slid into the inner hole of the blanking short tube from the upper end of the through-hole through the sliding fit between the support leg plate B and the axial mounting groove, and a circle of chamfers on the centering positioning plate faces the upper end of the through-hole of the blanking short tube. When the centering positioning plate is pushed to the bottom of the axial mounting groove, the centering positioning plate is installed in the inner hole of the blanking short tube.

[0016] The technical solution of the present invention is: a method for in-situ installation of a moving bed underground ore body, based on the above-mentioned underground sealed pipeline moving bed, the steps are as follows: S01. Transport components to the assembly location: All components comprising the underground sealed pipe-type mobile bed are transported via a vertical shaft to either the upper or lower horizontal roadway, depending on the required installation location. Specifically, all components comprising the inner tube and drop tube are transported to the upper horizontal roadway, all centering plates are transported to the upper horizontal roadway, the tapered tube, immersion tube, and end support plates are transported to the lower horizontal roadway, the sealed storage tank is transported to the upper horizontal roadway, and the lower liquid inlet tank is transported to the lower horizontal roadway. S02. Assembling and pouring the outer pipe: at the upper end of the upper installation hole, all the blanking short pipes that make up the blanking pipe are connected in sequence and vertically lowered in the order from bottom to top. During the connection process, a piece of centering positioning plate is respectively installed in the inner hole of each blanking short pipe, until all the blanking short pipes are connected to form a complete blanking pipe, at which time the blanking pipe is located in the upper installation hole. Ensure that the blanking pipe is vertically centered in the upper installation hole, so that an annular gap is formed between the outer cylindrical surface of the blanking pipe and the inner hole wall of the upper installation hole, and the upper and lower ports of the blanking pipe respectively extend out of the upper and lower ports of the upper installation hole. Then the blanking pipe is poured and fixed in the upper installation hole by cement mortar. At the lower end of the lower installation hole, the tapered pipe is inserted into the lower installation hole and connected to the lower port of the blanking pipe, and the dipping pipe is inserted into the lower installation hole and connected to the lower port of the tapered pipe. At this time, the tapered pipe and the dipping pipe are located in the lower installation hole, that is, the assembly and pouring of the outer pipe are completed. S03. Assembling and limiting installation of the inner pipe: at the upper end of the blanking pipe, all the components that make up the inner pipe are connected in sequence and vertically lowered in the order from bottom to top. During the lowering process, the screen pipe and all the liquid feeding short pipes pass through the pipe hole B in the center of each centering positioning plate in sequence, so as to ensure that the screen pipe and all the liquid feeding short pipes are centered in the inner hole of the blanking pipe. When the lower end surface of the screen pipe abuts against the center plate of the end surface supporting plate, the limiting installation of the screen pipe and the liquid feeding pipe is completed. Then the lower port of the butt joint pipe is connected to the upper port of the liquid feeding pipe, that is, the assembly and limiting installation of the inner pipe are completed. S04. Connecting the sealed storage tank: the sealed storage tank located in the upper horizontal tunnel is connected to the upper end of the middle double pipe, so that the upper end of the butt joint pipe is connected to the inner port of the poor liquid discharge pipe, and the upper port of the blanking pipe is connected to the resin falling port. S05. Connecting the lower liquid inlet tank: the lower liquid inlet tank located in the lower horizontal tunnel is connected to the lower end of the middle double pipe, so that the lower port of the dipping pipe is connected to the butt joint port, and the lower end surface of the resin discharge port is spaced from the bottom surface of the lower horizontal tunnel to leave a clear height for discharging saturated resin.

[0017] The further technical solution of the present application is that in the S03 step, the process of installing the centering positioning plate is as follows: before connecting each blanking short pipe with the upper end of one blanking short pipe, and after completing the connection of the uppermost blanking short pipe, a piece of centering positioning plate is installed in the axial installation slot in the inner hole of the target blanking short pipe through the upper end hole of the target blanking short pipe.

[0018] Compared with the prior art, the present application has the following advantages: 1. All the components of the underground sealed pipeline type moving bed are modular components, and adjacent components are connected by threads or flanges, which are easy to assemble and convenient to transport. With a specific installation method, the installation requirements in the narrow underground ore body tunnel system can be met.

[0019] 2. Compared with the traditional ground mobile bed, the underground sealed pipeline mobile bed does not need to build ground facilities, and the adsorption enrichment of the uranium leaching solution (rich solution) is completed in situ in the underground ore body (the saturated resin is collected in the lower horizontal roadway, and then transported to the ground through the shaft), which meets the strategic concealment requirement.

[0020] 3. The underground sealed pipeline mobile bed is installed between the upper horizontal roadway and the lower horizontal roadway corresponding to the target mining layer, achieving in-situ installation in the underground ore body. Compared with the traditional ground mobile bed, the length of the transport pipeline of the leaching solution (rich solution) and the leaching solution is greatly reduced (the transport path of the traditional ground mobile bed: ground-underground ore heap, the pipeline length can reach hundreds of meters; the transport path of the underground sealed pipeline mobile bed: in-situ crushed ore heap-upper horizontal roadway or lower horizontal roadway, the pipeline length is only dozens of meters), reducing the transportation energy consumption, transportation time and leakage risk.

[0021] 4. The height of the underground sealed pipeline mobile bed is equivalent to the height of the mining layer, about 30-40 m, which is much higher than that of the traditional ground mobile bed (about 20 m), and most of the height of the underground sealed pipeline mobile bed is contributed by the middle double pipe, which is a slender pipeline structure. Therefore, the liquid level control in the mobile bed is very important (the liquid level should be avoided to rise to the narrow annular column interlayer, causing the resin microspheres in the annular column interlayer to absorb water, stick together, and even block the annular column interlayer). To solve this problem, the technical means adopted is to design the inner cavity A of the sealed storage tank as a sealed space to ensure that there is no air leakage, so that the air in the inner cavity A of the sealed storage tank and the annular column interlayer is not squeezed out due to the rising of the liquid level in the inner cavity B of the lower liquid inlet tank. Under the action of the suction of the liquid pump B and the static pressure difference of the liquid level inside and outside the screen mesh pipe, the rich solution liquid level is finally within the range of "immersed screen mesh pipe, not entering the annular column interlayer", effectively avoiding the condition that the resin microspheres in the annular column interlayer are soaked, stick together, and even block the annular column interlayer.

[0022] The application will be further described below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure is a structural schematic diagram of the application; Figure 2 is a sectional view of A of the figure; Figure 1 Figure 3 is a sectional view of B-B of the figure; Figure 2 Figure 4 is a sectional view of C of the figure; Figure 1 Figure 5 Figure 1 ​​​​Magnified view of the D part; Figure 6 Schematic diagram of the structure of the end support plate; Figure 7 This is the installation status diagram of the end support plate; Figure 8 This is a schematic diagram of the structure and installation of an in-situ embedded leaching-adsorption circulation system for underground ore bodies; Figure 9 for Figure 8 A magnified view of part E; Figure 10 for Figure 8 Magnified view of part F.

[0024] Legend: sealed storage tank 1; inner cavity A11; atmosphere communication port 12; compressed air injection port 13; sealed feeder 14; lean liquid discharge pipe 15; resin drop port 16; inner pipe 2; docking pipe 21; liquid delivery pipe 22; screen pipe 23; outer pipe 3; drop pipe 31; axial mounting groove 311; tapered pipe 32; immersion pipe 33; axial strip groove 331; circumferential arc groove 332; lower liquid inlet tank 4; inner cavity B41; docking port 42; saturated resin outlet 43; rich liquid inlet pipe 44; vertical shaft 51; horizontal tunnel 52; mining layer 53; installation channel 54; upper installation hole 541; lower Mounting hole 542; annular step surface 543; in-situ crushed ore pile 55; false bottom 56; pumping pipe 71; leachate collection tank 72; leachate inlet 721; leachate outlet 722; pumping pump A73; leachate mixing tank 81; lean liquid recovery port 811; acid liquid addition port 812; leachate outlet 813; spray pipe 82; cross-layer pipeline 83; pumping pump B84; annular column interlayer 100; annular column interval 200; end face support plate 300; center plate 301; support leg plate A302; centering positioning plate 400; annular plate 401; annular plate 401; support leg plate B402; chamfer 403. DETAILED DESCRIPTION Example 1

[0025] like Figures 1-7 As shown, the underground sealed pipe type moving bed includes a sealed material storage tank, a middle double pipe and a lower liquid inlet tank connected in sequence from top to bottom.

[0026] The sealed storage tank 1 is provided with an inner cavity A11 for storing resin microspheres, and the top of the sealed storage tank 1 is provided with an atmospheric communication port 12, a compressed air injection port 13 and a sealed feeder 14. Sealing plugs (not shown in the figure) are movably installed on the atmospheric communication port 12 and the compressed air injection port 13. Based on the sealing effect of the sealing plugs, the atmospheric communication port 12 and the compressed air injection port 13 are in a sealed normally closed state, and the sealing plugs are only pulled out when performing specific operations (for example, when it is necessary to balance the air pressure in the inner cavity A11 of the sealed storage tank 1 and the outside world, the sealing plug on the atmospheric communication port 12 is pulled out. When it is necessary to push down the resin microspheres inside the middle double tube, the sealing plug on the compressed air injection port 13 is pulled out, and then the air outlet pipe of the air compressor (the air compressor is an external device) is connected to the compressed air injection port 13). The sealed feeder 14 is used to add dry resin microspheres to the inner cavity A11 of the sealed storage tank 1. A through-hole A (not marked in the figure) is provided on the side wall or top wall of the sealed storage tank 1. A lean liquid discharge pipe 15 with a valve is sealed and installed in the pipe hole A. The inner and outer ends of the lean liquid discharge pipe 15 are respectively located in the inner cavity A11 of the sealed storage tank 1 and outside the sealed storage tank 1. A resin drop port 16 is provided at the bottom of the sealed storage tank 1.

[0027] The middle double tube includes an outer tube 3 and an inner tube 2 fixedly installed in the center of the outer tube 3 (the definition of "centered" is that the axial center lines of the inner tube 2 and the outer tube 3 coincide with each other). A ring column interlayer 100 for accommodating resin microspheres is formed between the inner tube 2 and the outer tube 3, and the ring column interlayer 100 is directly connected to the resin drop opening 16 of the sealed storage tank 1 at the upper end. The outer tube 3 is a rigid tube with open ends as a whole. The outer tube 3 includes a drop pipe 31, a tapered tube 32 and a immersion tube 33 connected in sequence from top to bottom. The outer diameter of the drop pipe 31 is smaller than the outer diameter of the immersion tube 33, and the inner diameter of the drop pipe 31 is smaller than the inner diameter of the immersion tube 33. The upper end of the drop pipe 31 is fixedly connected to the resin drop opening 16 of the sealed storage tank 1. The tapered tube 32 is connected between the drop pipe 31 and the immersion tube 33, and is used for the pipe diameter transition between the drop pipe 31 and the immersion tube 33. The inner tube 2 includes a butt joint 21, a liquid feeding pipe 22, and a screen tube 23, which are connected in sequence from top to bottom. The liquid feeding pipe 22 is a rigid tube with open ends. The liquid feeding pipe 22 is installed in the inner hole of the drop tube 31. The annular column interlayer 100 is located between the outer circumferential surface of the liquid feeding pipe 22 and the inner hole wall of the drop tube 31. The upper end of the liquid feeding pipe 22 passes through the resin drop opening 16 of the sealed storage tank 1 and enters the inner cavity A11 of the sealed storage tank 1. The lower end of the liquid feeding pipe 22 passes through the lower end opening of the drop tube 31 and enters the inner hole of the tapered tube 32. The screen tube 23 is a rigid tube with an open upper end and a closed lower end. The upper end of the screen tube 23 is threadedly connected to the lower end of the liquid feeding pipe 22. The outer circumferential surface of the screen tube 23 is provided with water-permeable holes (not marked in the figure) that are smaller than the resin microspheres and evenly distributed. The upper and lower end surfaces of the screen tube 23 do not exceed the upper and lower end surfaces of the immersion tube 33, respectively. The butt joint pipe 21 is a flexible pipe with both ends open. Both ends of the butt joint pipe 21 are sealed and connected to the inner port of the lean liquid discharge pipe 15 and the upper port of the liquid delivery pipe 22 respectively.

[0028] The lower liquid inlet tank 4 has an inner cavity B41 for accommodating resin microspheres and rich liquid. A docking port 42 is provided at the upper end of the lower liquid inlet tank 4. A saturated resin outlet 43 with a valve is provided at the bottom of the lower liquid inlet tank 4 for discharging saturated resin microspheres. A rich liquid inlet pipe 44 is provided on the sidewall of the lower liquid inlet tank 4. The inner and outer ends of the rich liquid inlet pipe 44 are located in the inner cavity B41 of the lower liquid inlet tank 4 and outside the lower liquid inlet tank 4, respectively. The outer end of the rich liquid inlet pipe 44 is used to input rich liquid, and the inner end of the rich liquid inlet pipe 44 is arranged vertically downward for discharging rich liquid into the inner cavity B41 of the lower liquid inlet tank 4. The docking port 42 of the lower liquid inlet tank 4 is fixedly connected to the lower end of the dipping tube 33. Rich liquid from the outside is fed into the inner cavity B41 of the lower liquid inlet tank 4 via the rich liquid inlet pipe 44, causing the liquid level in the inner cavity B41 to gradually rise. Since the density of the unsaturated resin microspheres is less than that of water, they float on the upper layer of the rich liquid. There, they countercurrently come into contact with the continuously rising rich liquid. Through ion exchange, the unsaturated resin microspheres absorb the uranyl complexes in the rich liquid, gradually reaching saturation. Since the density of the saturated resin microspheres is greater than that of water, they sink and accumulate at the bottom of the inner cavity B41 of the lower liquid inlet tank 4, ultimately forming a distinct "three-layer" structure: a saturated resin layer at the bottom, a lean liquid layer in the middle, and an unsaturated resin layer at the top. In the unsaturated resin layer, the resin microspheres in the section where the screen tube 23 is located are all submerged in the rich liquid, while the resin microspheres in the section where the liquid feed pipe 22 is located are dry, unsaturated resin.

[0029] Preferably, the length of the screen tube 23 is 1-4 meters (preferably 2.5 meters), the outer diameter of the screen tube 23 is 75-85 mm (preferably 80 mm), and the inner diameter of the immersion tube 33 is accordingly 390-410 mm (preferably 400 mm). These three parameters together define a sized annular column section 200. The length of the annular column section 200 is the length of the screen tube 23, and the cross-sectional shape of the annular column section 200 is the circular ring formed by the outer wall of the screen tube 23 and the inner wall of the immersion tube 33. During the operation of the underground sealed pipe-type moving bed, the resin microspheres within the annular column interval 200 are immersed in the rich liquid. The resin microspheres absorb the uranyl complex in the rich liquid through ion exchange, gradually increasing in density until they become saturated resin and sink. At the same time, the uranyl complex in the rich liquid is adsorbed onto the resin microspheres, turning it into a lean liquid. Under the action of negative pressure (the negative pressure is provided by a liquid pump directly or indirectly connected to the outer port of the lean liquid discharge pipe 15, which is an external device), the lean liquid enters the interior of the screen tube 23 and is discharged to the outside of the underground sealed pipe-type moving bed through the screen tube 23, the liquid supply pipe 22, the connecting pipe 21, and the lean liquid discharge pipe 15. If the annular column interval 200 is designed too small (the screen tube 23 is less than 1m long and the immersion pipe 33 has an inner diameter less than 390mm), the ion exchange efficiency will be low. If the ring column interval 200 is designed to be too large (for example, the length of the screen tube 23 is greater than 4m, and the inner diameter of the immersion tube 33 is greater than 410mm), it is necessary to dig a lower mounting hole 542 with a larger aperture to adapt to it (equivalent to increasing the digging amount of the lower mounting hole 542).

[0030] Preferably, the blanking pipe 31 is formed by threading a plurality of short blanking pipes with a length of 0.8-1.2 m in sequence, and the length of the blanking pipe 31 exceeds the length of the upper mounting hole 541 by 0.2-0.5 m.

[0031] Preferably, the liquid delivery pipe 22 is formed by threading a plurality of short liquid delivery pipes with a length of 0.8-1.2 m in sequence, and the upper end of the uppermost liquid delivery pipe exceeds the upper end of the blanking pipe 31 by 0.1-0.2 m.

[0032] Preferably, a plurality of axial strip grooves 331 extending axially are provided at the lower end opening of the immersion tube 33, and the upper end of each axial strip groove 331 is connected to a circumferential arc groove 332 arranged circumferentially; a plurality of axial mounting grooves 311 extending axially are provided in the inner hole of each blanking short tube, and the direction of the axial mounting groove 311 extends from the upper end opening to the lower end opening of the blanking short tube, but does not pass through to the lower end opening of the blanking short tube.

[0033] The inner tube 2 is fixedly mounted in the inner hole of the outer tube 3 via a positioning assembly. The positioning assembly includes an end support plate 300 and multiple centering positioning plates 400. The end support plate 300 is fixedly mounted in the inner hole of the immersion tube 33, and the centering positioning plate 400 is mounted in the inner hole of the blanking short tube.

[0034] The end support plate 300 includes a center plate 301 and a plurality of support leg plates A302 connected to the outside of the center plate 301. A fan-shaped hollow is formed between two adjacent support leg plates A302 for the resin microspheres to pass through. The number of support leg plates A302 is consistent with the number of axial strip grooves 331 and corresponds one to one. The number of support leg plates A302 is consistent with the number of circumferential arc grooves and corresponds one to one. The end support plate 300 is connected to the axial strip grooves of the dipping tube 33 through the support leg plates A302. 331, slide from the lower end opening of the immersion tube 33 into the inner hole of the immersion tube 33. When the end support plate 300 is pushed to the intersection of the axial positioning groove 331 and the circumferential arc groove 332 of the immersion tube 33, rotate the end support plate 300 so that the support leg plate A302 on the end support plate 300 enters the corresponding circumferential arc groove 332 in the inner hole of the immersion tube 33, thereby realizing the fixed installation of the end support plate 300 in the inner hole of the immersion tube 33.

[0035] The number of centering plates 400 is consistent with the number of short blanking tubes in the blanking tube 31 and corresponds one to one. The centering plates 400 include an annular plate 401 and a plurality of support plates B402 connected to the outside of the annular plate 401. A fan-shaped hollow is formed between two adjacent support plates B402 for the passage of resin microspheres. A through-hole B is provided at the center of the annular plate 401 for the liquid supply short tube to slide through. The upper end of the through-hole B is provided with a circle of chamfers 403 for guiding the insertion of the pipe. The centering plates 400 are slid into the inner hole of the short blanking tube from the upper end of the through-hole through the sliding fit between the support plates B402 and the axial mounting groove 221, and the circle of chamfers 403 on the centering plates 400 faces the upper end of the through-hole of the short blanking tube. When the centering plates 400 are pushed to the bottom of the axial mounting groove 311, the centering plates 400 are installed in the inner hole of the short blanking tube.

[0036] Briefly describe the installation position of the present invention: See Figures 8-10 A channel system is provided within the underground ore body. The channel system includes (but is not limited to) a vertical shaft 51 and multiple horizontal tunnels 52 excavated in the horizontal direction. All horizontal tunnels 52 extend in the same direction and face each other vertically. The front ends of each horizontal tunnel 52 are connected to different depths of the vertical shaft 51. The ore body area between the rear ends of any two horizontal tunnels 52 is a mining layer 53, thereby forming multiple mining layers 53 separated from each other by different horizontal tunnels 52 from top to bottom. After blasting, the mining layers 53 form an in-situ crushed ore pile 55.

[0037] A mounting channel 54 is drilled vertically between the midsections of any two vertically adjacent horizontal lanes 52. Mounting channel 54 includes an upper mounting hole 541 and a lower mounting hole 542, which are connected in sequence. The cross-sectional area of ​​lower mounting hole 542 is larger than that of upper mounting hole 541, thereby forming an annular step surface 543 between upper mounting hole 541 and lower mounting hole 542. The two horizontal lanes 52 connected at the upper and lower ends of the target mounting channel 54 are defined as the upper horizontal lane and the lower horizontal lane, respectively.

[0038] The underground sealed pipe-type mobile bed is fixedly installed in the target installation channel 54 and its two horizontal tunnels 52 (upper and lower horizontal tunnels) connected at their upper and lower ends. The outer tube 3 is fixedly installed vertically in the installation channel 54 through a casting process. The upper end of the outer tube 3 (i.e., the upper end of the drop tube 31) extends into the upper horizontal tunnel, and the lower end of the outer tube 3 (i.e., the lower end of the immersion tube 33) extends into the lower horizontal tunnel. The sealed storage tank 1 is installed in the upper horizontal tunnel. The lower liquid inlet tank 4 is installed in the lower horizontal tunnel.

[0039] Briefly describe the installation process of the present invention: See Figures 8-10 As shown, the underground sealed pipe type moving bed is fixedly installed in the target installation channel 54 and two horizontal tunnels 52 (upper horizontal tunnel and lower horizontal tunnel) connected at the upper and lower ends. The installation process is as follows: Step 1. Transport components to the assembly location: All components that make up the underground sealed pipe-type mobile bed are transported to the upper or lower horizontal tunnel via the vertical shaft 51, depending on the installation location requirements. Specifically, all components that make up the inner tube 2 and the drop tube 31 are transported to the upper horizontal tunnel, all centering plates 400 are transported to the upper horizontal tunnel, the tapered tube 32, the immersion tube 33, and the end support plate 300 are transported to the lower horizontal tunnel, the sealed storage tank 1 is transported to the upper horizontal tunnel, and the lower liquid inlet tank 4 is transported to the lower horizontal tunnel.

[0040] Step 2. Assemble and cast the outer tube: At the upper end of the upper mounting hole 541, thread all the short tubes that make up the drop tube 31 together in sequence, from bottom to top, and lower them vertically. During the connection process, insert a centering plate 400 into the inner hole of each short tube until all the short tubes are connected to form a complete drop tube 31. At this point, the drop tube 31 is located in the upper mounting hole 541. Ensure that the drop tube 31 remains vertically centered in the upper mounting hole 541, forming an annular gap between the outer surface of the drop tube 31 and the inner wall of the upper mounting hole 541. The upper and lower ends of the drop tube 31 extend out of the upper and lower ends of the upper mounting hole 541, respectively. Then, cast cement mortar to secure the drop tube 31 in the upper mounting hole 541. At the lower end opening of the lower mounting hole 542, the tapered tube 32 is sent into the lower mounting hole 542 and connected to the lower end of the drop tube 31, and the immersion tube 33 is sent into the lower mounting hole 542 and connected to the lower end of the tapered tube 32. At this time, the tapered tube 32 and the immersion tube 33 are both located in the lower mounting hole 542, and the assembly and pouring fixation of the outer tube 3 are completed.

[0041] In this step, the process of installing the centering positioning plate 400 is as follows: before each blanking short tube is connected to the upper blanking short tube, and after the uppermost blanking short tube is connected, a centering positioning plate 400 is inserted into the axial mounting groove 311 in the inner hole of the target blanking short tube through the upper end hole of the target blanking short tube.

[0042] Step 3. Assemble and limit the installation of the inner tube: At the upper end opening of the drop tube 31, connect all the components that make up the inner tube 2 (the screen tube 23, all the liquid supply short tubes, and the docking tube 21) in sequence from bottom to top and lower them vertically. During the lowering process, the screen tube 23 and all the liquid supply short tubes pass through the through-holes B at the center of all the centering positioning plates 400 in sequence, thereby ensuring that the screen tube 23 and all the liquid supply short tubes remain centered in the inner hole of the drop tube 31. When the lower end face of the screen tube 23 abuts against the center plate 301 of the end face support plate 300, the limit installation of the screen tube 23 and the liquid supply tube 22 is completed, and then the lower port of the docking tube 21 is connected to the upper port of the liquid supply tube 22, and the assembly and limit installation of the inner tube 2 are completed.

[0043] Step 4. Connect the sealed storage tank: Connect the sealed storage tank 1 located in the upper horizontal lane to the upper end of the middle double pipe, connect the upper end of the butt-joint pipe 21 to the inner port of the lean liquid discharge pipe 15, and connect the upper port of the drop pipe 31 to the resin drop port 16.

[0044] The specific operation of this step is: move the sealing storage tank 1 located in the upper horizontal tunnel to the top of the outer tube 3 and the inner tube 2, first send the upper end of the butt joint pipe 21 into the inner cavity A11 of the sealing storage tank 1 through the resin falling port 16 of the sealing storage tank 1, then lower the sealing storage tank 1 to the resin falling port 16 at the lower end of the sealing storage tank 1 to be opposite and in contact with the upper end surface of the falling pipe 31, then seal and fixedly connect the resin falling port 16 of the sealing storage tank 1 on the upper end surface of the falling pipe 31 (through flanges and sealing rings), so that the inner cavity A11 of the sealing storage tank 1 is communicated with the ring column interlayer 100 (located between the inner tube 2 and the outer tube 3), then support and place the sealing storage tank 1 on the bottom surface of the upper horizontal tunnel, then open the top cover of the sealing storage tank 1, connect the upper end of the butt joint pipe 21 to the inner port of the poor liquid discharge pipe 15, and finally install the top cover of the sealing storage tank 1 back to its original position.

[0045] Step 5. Connect the lower liquid inlet tank: connect the lower liquid inlet tank 4 located in the lower horizontal tunnel to the lower end of the middle double tube, so that the lower end port of the dipping pipe 33 is communicated with the butt joint 42, and the lower end surface of the resin discharge port 43 is left with a clear height for discharging saturated resin from the bottom surface of the lower horizontal tunnel.

[0046] The specific operation of this step is: move the lower liquid inlet tank 4 located in the lower horizontal tunnel to the lower side of the outer tube 3 and the inner tube 2, first lift the lower liquid inlet tank 4 upward to the butt joint 42 at the upper end of the lower liquid inlet tank 4 to be opposite and in contact with the lower end port of the dipping pipe 33, then seal and fixedly connect the butt joint 42 of the lower liquid inlet tank 4 on the lower end port of the dipping pipe 33 (through flanges and sealing rings), so that the ring column interlayer 100 (located between the inner tube 2 and the outer tube 3) is communicated with the inner cavity B41 of the lower liquid inlet tank 4, then support and place the lower liquid inlet tank 4 on the bottom surface of the lower horizontal tunnel. An open container for receiving saturated resin microspheres can be placed below the resin discharge port 43.

[0047] Brief description of the upper application of the present application: As shown in Figures 8-10 The underground sealed pipeline type moving bed belongs to the underground ore body in-situ embedded leaching-adsorption circulating system. The "leaching" therein represents the process of dissolving the in-situ crushed ore heap 55 by leaching liquid, thereby generating leaching liquid (rich liquid). The "adsorption" therein represents the process of countercurrent contact of the leaching liquid (rich liquid) with resin microspheres after entering the inside of the underground sealed pipeline type moving bed, the uranyl complex in the leaching liquid (rich liquid) is adsorbed on the resin microspheres, thereby the leaching liquid (rich liquid) becomes poor liquid, and the poor liquid is discharged from the inside of the underground sealed pipeline type moving bed. The "circulation" is embodied in the closed loop conversion of "generating leaching liquid (rich liquid) in the in-situ crushed ore heap - leaching liquid (rich liquid) entering the inside of the underground sealed pipeline type moving bed and being converted into poor liquid - poor liquid being adjusted into leaching liquid in the leaching liquid adjusting tank 81 - leaching liquid being sprayed on the in-situ crushed ore heap to generate leaching liquid (rich liquid)".

[0048] The in-situ embedded leaching-adsorption circulation system for underground ore body includes underground sealed pipeline moving bed, leaching liquid collecting device and poor liquid recycling device.

[0049] The underground sealed pipeline moving bed is fixedly installed in the target installation channel 54 and two horizontal roadways 52 (upper horizontal roadway and lower horizontal roadway) which are communicated with the upper and lower ends of the target installation channel 54. The number of the underground sealed pipeline moving bed is consistent with the number of the installation channel 54 and one-to-one correspondence. The structure and installation of the underground sealed pipeline moving bed are as described above.

[0050] The leaching liquid collecting device includes a liquid pumping pipe 71, a leaching liquid collecting tank 72 and two liquid pumping pumps A 73. The leaching liquid collecting tank 72 is installed in the lower horizontal roadway, and the upper and lower ends of the leaching liquid collecting tank 72 are respectively provided with a leaching liquid inlet 721 and a leaching liquid outlet 722. The front end of the liquid pumping pipe 71 extends into the in-situ crushed ore heap 55 at the rear end of the lower horizontal roadway, the rear end of the liquid pumping pipe 71 is communicated with the leaching liquid inlet 721 of the leaching liquid collecting tank 72, the leaching liquid outlet 722 of the leaching liquid collecting tank 72 is communicated with the outer end of the rich liquid input pipe 44, and the two liquid pumping pumps A 73 are respectively arranged between the leaching liquid collecting tank 72 and the rich liquid input pipe 44 and between the leaching liquid collecting tank 72 and the rear end of the liquid pumping pipe 71, so as to pump the leaching liquid (rich liquid) in the in-situ crushed ore heap 55 into the leaching liquid collecting tank 72 and pump the leaching liquid in the leaching liquid collecting tank 72 into the inner cavity B41 of the lower liquid inlet tank 4.

[0051] The poor liquid recycling device includes a leaching liquid dispensing tank 81, a spraying pipe 82, a cross-layer pipeline 83 and two liquid pumping pumps B 84. The leaching liquid dispensing tank 81 is installed in the upper horizontal roadway, the upper end of the leaching liquid dispensing tank 81 is provided with a poor liquid recovery port 811 and an acid liquid adding port 812, the lower end of the leaching liquid dispensing tank 81 is provided with a leaching liquid outlet 813 with a valve, and the poor liquid recovery port 811 of the leaching liquid dispensing tank 81 is communicated with the outer end of the poor liquid discharge pipe 15. The spraying pipe 82 is arranged above the in-situ crushed ore heap 55 at the rear end of the lower horizontal roadway, the two ends of the spraying pipe 82 are respectively provided with a liquid inlet and a liquid outlet, the liquid outlet of the spraying pipe 82 faces the in-situ crushed ore heap 55 and is used for spraying leaching liquid to the in-situ crushed ore heap 55. The upper end of the cross-layer pipeline 83 is communicated with the leaching liquid outlet 813 of the leaching liquid dispensing tank 81, and the lower end of the cross-layer pipeline 83 is sequentially communicated with the liquid inlet of the spraying pipe 82 through the upper horizontal roadway, the vertical shaft and the lower horizontal roadway. The two liquid pumping pumps B 84 are respectively arranged between the leaching liquid dispensing tank 81 and the poor liquid discharge pipe 15 and between the liquid inlet of the spraying pipe 82 and the lower end of the cross-layer pipeline 83, so as to pump the poor liquid discharged by the underground sealed pipeline moving bed into the leaching liquid dispensing tank 81 and deliver the prepared leaching liquid in the leaching liquid dispensing tank 81 into the spraying pipe 82.

[0052] Briefly describe the working principle of the system: The underground ore body in-situ sealed leaching-adsorption closed-loop process is applied to the underground ore body in-situ embedded leaching-adsorption circulation system, which is used to complete the adsorption enrichment of uranium ore leachate (rich solution) and the closed-loop regeneration of the leaching solution (the solution used to spray the in-situ crushed ore pile 55) in the mining layer 53 of the underground ore body in situ.

[0053] S01, constructing an in-situ crushed ore pile: A. Excavation of a pit at the lower end of the mining layer: Define two adjacent horizontal tunnels above and below the target mining layer 53 as an upper horizontal tunnel and a lower horizontal tunnel. The target mining layer 53 is located between the rear end of the upper horizontal tunnel and the rear end of the lower horizontal tunnel. In the lower horizontal tunnel below the target mining layer, a pit is excavated to a certain depth (the pit volume is 20% of the target mining layer volume) as a reserved blasting compensation space. The excavated crushed ore is transported to the surface via the lower horizontal tunnel 52 and the vertical shaft 51. B. Constructing a false bottom at the bottom of the mine: A false bottom 56 is constructed at the bottom of the mine for bearing weight. A base having a water-isolating effect (preventing the leachate (rich liquid) seeping from the in-situ crushed ore pile 55 from seeping under the false bottom 56) is laid on the upper surface of the false bottom 56. The false bottom 56 is used to receive the crushed ore from subsequent blasting and collapse of the target mining layer. C. Blasting the mining layer to form an ore pile: A blasthole network is drilled upward from the lower end of the target mining layer at the rear end of the lower horizontal roadway. The blasthole network is filled with explosives, and the target mining layer 53 is blasted in situ. The crushed ore caused by the blasting naturally falls on the base above the false bottom 56, forming an in-situ crushed ore pile 55.

[0054] S02, leaching and extraction of rich solution: The leaching liquid prepared in the leaching liquid preparation tank 81 is driven by the liquid pump B84 and sprayed onto the in-situ crushed ore pile 55 through the cross-layer pipeline 83 and the spray pipe 82. The uranium minerals in the in-situ crushed ore pile 55 are dissolved, and a rich liquid containing uranyl complexes is leached. The rich liquid is pumped into the leachate collection tank 72 by the liquid pump A73 and then input into the inner cavity B41 of the lower liquid inlet tank 4 through the rich liquid input pipe.

[0055] In this step, the cross-layer pipeline 83 is entirely located in the underground ore body, and its path only includes the upper horizontal roadway in the upper horizontal roadway-the vertical shaft to the height-the lower horizontal roadway in the lower horizontal roadway. S03, conversion between rich solution and lean solution: After the leachate (rich liquid) enters the inner cavity B41 of the lower liquid inlet tank 4, the liquid level in the inner cavity B41 gradually rises. When the leachate (rich liquid) overflows the unsaturated resin microspheres, the following two events occur simultaneously: Ⅰ. Unsaturated resin microspheres are dominated by the drag force of the rising liquid flow and are distributed in the upper part of the inner cavity B41 of the lower liquid inlet tank 4. Saturated resin microspheres are dominated by gravity and are deposited and accumulated at the bottom of the inner cavity B41 of the lower liquid inlet tank 4. Finally, a "three-layer structure" (saturated resin layer at the bottom, lean liquid layer in the middle, and unsaturated resin layer at the top) is formed in the inner cavity B41 of the lower liquid inlet tank 4. Ⅱ. The leaching liquid (rich liquid) is in countercurrent contact with the unsaturated resin microspheres in the upper part of the inner cavity B41 of the lower liquid inlet tank 4 during the rising process. The uranyl complex in the leaching liquid (rich liquid) is adsorbed by the unsaturated resin microspheres, causing the leaching liquid (rich liquid) to gradually become lean liquid. The lean liquid passes through the water-permeable holes of the screen pipe 23 under the combined action of the liquid level static pressure difference inside and outside the screen pipe 23 and the suction force of the liquid pumping pump B84 (located between the leaching liquid adjusting tank 81 and the lean liquid discharge pipe 15), enters the inner hole of the screen pipe 23, and then passes through the liquid feeding pipe 22, the butt joint pipe 21, and the lean liquid discharge pipe 15 in turn, and finally enters the leaching liquid adjusting tank 81.

[0056] In this step, during the operation of the underground sealed pipeline type moving bed, as more and more unsaturated resin microspheres are converted into saturated resin microspheres, the saturated resin microspheres sink and accumulate at the bottom of the inner cavity B41 of the lower liquid inlet tank 4. The voids in the inner cavity A11 of the sealed storage tank 1 and the annular column interlayer 100 also gradually increase, and the air pressure in the inner cavity A11 of the sealed storage tank 1 and the annular column interlayer 100 also gradually decreases, causing the rich liquid level to continuously rise. To keep the rich liquid level within the range of "immersing the screen pipe 23 and not entering the annular column interlayer 100", the atmospheric communication port 12 at the upper end of the sealed storage tank 1 is opened in a timely manner to allow a certain amount of external air to enter the inner cavity A11 of the sealed storage tank 1 and the annular column interlayer 100.

[0057] In this step, during the operation of the underground sealed pipeline type moving bed, if the resin microspheres in the annular column interlayer 100 are stuck together, compressed air is injected into the inner cavity A11 of the sealed storage tank 1 and the annular column interlayer 100 through the compressed air injection port 13 to push the stuck resin microspheres downward, so that the stuck resin microspheres enter the annular column interval 200 between the outer wall of the screen pipe 23 and the inner wall of the leaching pipe 33.

[0058] In this step, during the operation of the underground sealed pipeline type moving bed, the valve on the saturated resin outlet 43 at the bottom of the lower liquid inlet tank 4 is opened to discharge the saturated resin microspheres accumulated at the bottom of the inner cavity B41 of the lower liquid inlet tank 4, and the product of the closed-loop process is obtained.

[0059] S04, regeneration and reuse of leaching liquid: The acid liquid (for example, H2SO4) is added to the leaching liquid preparation tank 81 through the acid liquid adding port 812, the PH is adjusted to 1.5-2.0, so that the poor liquid is regenerated into the leaching liquid, and the liquid pumping pump B84 (located between the liquid inlet of the spray pipe 82 and the lower port of the cross-layer pipeline 83) is started; the leaching liquid is discharged from the leaching liquid outlet 813 of the leaching liquid preparation tank 81 under the drive of the liquid pumping pump B84, and then sprayed onto the in-situ broken ore heap through the cross-layer pipeline 83 and the spray pipe 82, so that the closed-loop regeneration of the leaching liquid is realized.

Claims

1. Underground sealed pipe type moving bed, installed in underground ore body; its characteristics are: It includes a sealed material storage tank, a middle double pipe and a lower liquid inlet tank which are connected in sequence from top to bottom; The sealed storage tank is provided with an inner cavity A, and the top of the sealed storage tank is provided with an atmospheric communication port, a compressed air injection port and a sealed feeder; the atmospheric communication port and the compressed air injection port are in a sealed normally closed state; a lean liquid discharge pipe is sealedly installed on the side wall or the top wall of the sealed storage tank, and a resin drop port is provided at the bottom of the sealed storage tank; The central double tube includes an outer tube and an inner tube fixedly installed in the center of the outer tube; a ring column sandwich for accommodating resin microballoons is formed between the inner tube and the outer tube, and the upper end of the ring column sandwich is connected to the resin drop outlet; the outer tube includes a drop tube, a tapered tube and a immersion tube connected in sequence from top to bottom; the upper end of the drop tube is fixedly connected to the resin drop outlet; the inner tube includes a butt joint tube, a liquid feeding tube and a screen tube connected in sequence from top to bottom; the liquid feeding tube is installed in the inner hole of the drop tube, and the ring column sandwich is located between the outer circular surface of the liquid feeding tube and the inner hole wall of the drop tube, the upper end of the screen tube is threadedly connected to the lower end of the liquid feeding tube, and the outer circular surface of the screen tube is provided with a water-permeable hole smaller than the resin microballoon, and the upper and lower end faces of the screen tube do not exceed the upper and lower end faces of the immersion tube respectively; the two ends of the butt joint are respectively sealed and connected to the inner port of the lean liquid discharge pipe and the upper port of the liquid feeding pipe; An inner cavity B is provided inside the lower liquid inlet tank, a docking port is provided at the upper end of the lower liquid inlet tank, a saturated resin outlet is provided at the bottom of the lower liquid inlet tank, and a rich liquid input pipe is provided on the side wall of the lower liquid inlet tank; the docking port of the lower liquid inlet tank is fixedly connected to the lower end of the immersion pipe.

2. The underground sealed pipe type moving bed according to claim 1, characterized in that: A channel system is provided in the underground ore body, comprising a vertical shaft and a plurality of horizontal tunnels dug in the horizontal direction; all the horizontal tunnels extend in the same direction and face each other vertically, and the front ends of the horizontal tunnels are connected to different depths of the vertical shaft; The ore body area between the rear ends of any two horizontal tunnels is the mining layer, thus forming multiple mining layers separated by different horizontal tunnels from top to bottom. After the mining layer is blasted, an in-situ crushed ore pile is formed; A mounting channel is drilled in the vertical direction between the middle sections of any two adjacent horizontal lanes, the mounting channel comprising an upper mounting hole and a lower mounting hole connected in sequence, the cross-sectional area of ​​the lower mounting hole being larger than the cross-sectional area of ​​the upper mounting hole; The underground sealed pipe-type moving bed is fixedly installed in the target installation channel and two horizontal tunnels connected to its upper and lower ends; wherein, the outer pipe is vertically fixedly installed in the target installation channel through a casting process, the upper end of the outer pipe extends out of the horizontal tunnel connected to the upper end of the target installation channel, and the lower end of the outer pipe extends out of the horizontal tunnel connected to the lower end of the target installation channel; wherein, the sealed storage tank is installed in the horizontal tunnel connected to the upper end of the target installation channel; wherein, the lower liquid inlet tank is installed in the horizontal tunnel connected to the lower end of the target installation channel.

3. The underground sealed pipe type moving bed according to claim 2, characterized in that: The length of the screen tube is 1-4m, the outer diameter of the screen tube is 75-85mm, and the inner diameter of the immersion tube is 390-410mm.

4. The underground sealed pipe type moving bed according to claim 3, characterized in that: The length of the screen tube is 2.5m, the outer diameter of the screen tube is 80mm, and the inner diameter of the immersion tube is 400mm.

5. The underground sealed pipe type moving bed according to claim 4, characterized in that: The drop pipe is formed by threading a plurality of drop short pipes with lengths between 0.8 and 1.2 m in sequence. The length of the drop pipe exceeds the length of the upper mounting hole by 0.2 to 0.5 m.

6. The underground sealed pipe type moving bed according to any one of claims 3 to 5, characterized in that: The liquid feeding pipe is formed by sequentially threading a plurality of liquid feeding short pipes with lengths between 0.8 and 1.2 meters. The upper end of the uppermost liquid feeding short pipe exceeds the height of the upper end of the drop pipe by 0.1 to 0.2 meters.

7. The underground sealed pipe type moving bed as described in claim 6, characterized in that: A plurality of axial strip grooves extending axially are provided at the opening of the lower end of the immersion tube, and the upper end of each axial strip groove is connected to a circumferential arc groove arranged circumferentially; a plurality of axial mounting grooves extending axially are provided in the inner hole of each blanking short tube, and the direction of the axial mounting grooves extends from the upper end to the lower end of the blanking short tube, but does not pass through to the lower end of the blanking short tube; The inner tube is fixedly mounted in the inner hole of the outer tube through a positioning assembly; the positioning assembly includes an end support plate and multiple centering positioning plates; the end support plate is fixedly mounted in the inner hole of the immersion tube, and the centering positioning plate is mounted in the inner hole of the blanking short tube; The end face supporting plate includes a central plate and a plurality of supporting leg plates A connected to the outer side of the central plate, and a fan-shaped hollow is formed between two adjacent supporting leg plates A for the passage of resin microspheres, and the number of supporting leg plates A is consistent with the number of axial strip grooves and corresponds one to one, and the number of supporting leg plates A is consistent with the number of circumferential arc grooves and corresponds one to one; the end face supporting plate is slid from the lower end opening of the immersion tube into the inner hole of the immersion tube through the sliding cooperation relationship between the supporting leg plates A and the axial strip grooves of the immersion tube. When the end face supporting plate is advanced to the intersection of the axial positioning groove and the circumferential arc groove of the immersion tube, the end face supporting plate is rotated so that the supporting leg plates A on the end face supporting plate enter the corresponding circumferential arc groove in the inner hole of the immersion tube, thereby realizing the fixed installation of the end face supporting plate in the inner hole of the immersion tube; The number of centering positioning plates is consistent with the number of short blanking tubes in the blanking tube and corresponds one to one. The centering positioning plate includes an annular plate and multiple support leg plates B connected to the outside of the annular plate. A fan-shaped hollow is formed between two adjacent support leg plates B402 for the resin microspheres to pass through. A through-hole B is provided at the center of the annular plate for the liquid supply short tube to slide through. A circle of chamfers is provided at the upper end of the through-hole B to guide the pipe docking and insertion; the centering positioning plate is slid into the inner hole of the blanking short tube from the upper end of the through-hole through the sliding fit between the support leg plate B and the axial mounting groove, and a circle of chamfers on the centering positioning plate faces the upper end of the through-hole of the blanking short tube. When the centering positioning plate is pushed to the bottom of the axial mounting groove, the centering positioning plate is installed in the inner hole of the blanking short tube.

8. A method for in-situ installation of a moving bed underground ore body, based on the underground sealed pipe moving bed according to claim 7, characterized in that the steps as follows: S01. Transport components to the assembly location: All components comprising the underground sealed pipe-type mobile bed are transported via a vertical shaft to either the upper or lower horizontal roadway, depending on the required installation location. Specifically, all components comprising the inner tube and drop tube are transported to the upper horizontal roadway, all centering plates are transported to the upper horizontal roadway, the tapered tube, immersion tube, and end support plates are transported to the lower horizontal roadway, the sealed storage tank is transported to the upper horizontal roadway, and the lower liquid inlet tank is transported to the lower horizontal roadway. S02. Assemble and cast the fixed outer tube: At the upper end of the upper mounting hole, thread all the short blanking tubes that make up the blanking tube in sequence from bottom to top and lower them vertically. During the connection process, insert a centering plate into the inner hole of each short blanking tube until all the short blanking tubes are connected to form a complete blanking tube. At this time, the blanking tube is located in the upper mounting hole; ensure that the blanking tube remains vertically centered in the upper mounting hole, so that the outer cylindrical surface of the blanking tube is aligned with the upper mounting hole. A ring column gap is formed between the inner hole walls, and the upper and lower ends of the drop tube are respectively extended out of the upper and lower ends of the upper mounting hole; the drop tube is then fixed in the upper mounting hole by pouring cement mortar; at the lower end opening of the lower mounting hole, the tapered tube is fed into the lower mounting hole and connected to the lower end of the drop tube, and the immersion tube is fed into the lower mounting hole and connected to the lower end of the tapered tube. At this time, the tapered tube and the immersion tube are both located in the lower mounting hole, and the assembly and pouring fixation of the outer tube are completed; S03. Assemble and position-limit the inner tube: At the upper opening of the drop tube, connect all components of the inner tube in sequence, from bottom to top, and lower them vertically. During the lowering process, the screen tube and all liquid delivery short tubes pass through the pipe hole B at the center of each centering positioning plate, ensuring that the screen tube and all liquid delivery short tubes remain centered within the inner opening of the drop tube. When the lower end of the screen tube abuts the center plate of the end support plate, the screen tube and liquid delivery tube are positioned and fixed. Then, connect the lower end of the connecting tube to the upper end of the liquid delivery tube, completing the assembly and position-limiting installation of the inner tube. S04 connection sealed storage tank: the sealed storage tank located in the upper horizontal lane is connected to the upper end of the double pipe in the middle, so that the upper end of the butt tube is connected to the lean liquid discharge pipe port, so that the upper port of the drop pipe is connected to the resin drop port; S05. Connect the lower liquid inlet tank: connect the lower liquid inlet tank located in the lower horizontal lane to the lower end of the middle double pipe, so that the lower end of the immersion pipe is connected to the docking port, and the lower end face of the resin discharge outlet has a clearance height from the bottom surface of the lower horizontal lane for discharging saturated resin.

9. The in-situ installation method of a moving bed underground ore body according to claim 8, characterized in that: In step S03, the process of installing the centering positioning plate is as follows: before each blanking short tube is connected to the upper blanking short tube, and after the uppermost blanking short tube is connected, a centering positioning plate is inserted into the axial mounting groove in the inner hole of the target blanking short tube through the upper end hole of the target blanking short tube.

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