Metal mine empty area filling device

Abstract

The present invention provides a filling device for a metal mine empty mining area, wherein a first supply pipe is connected to one side of a conveying pipe, a second supply pipe is provided on the other side of the conveying pipe, a conveying mechanism is slidably provided in the conveying pipe; a driving mechanism can drive the conveying mechanism to slide along the conveying pipe; a stirring mechanism is provided before the area to be backfilled, and the stirring mechanism is connected to the conveying pipe; the backfilling pipe is connected to the stirring mechanism, and the evenly mixed material in the stirring mechanism can be backfilled into the empty mining area through the backfilling pipe. The present invention facilitates the transportation of backfill material and coagulant by providing a conveying pipe, a conveying mechanism and a driving mechanism, and facilitates the stirring of materials by providing a stirring mechanism, which is easier to transport than stirred materials, reduces the demand for flowability during material transportation, and further reduces the water content in the material, increases the solid content in the mixed material, and prevents safety accidents caused by excessive water content of the material during the backfilling process.

Description

Technical Field

[0001] The invention belongs to the technical field of backfilling equipment, and more specifically, relates to a metal mine empty area filling device. Background Art

[0002] After the ore is mined, the goaf left in the mine often needs to be filled. Goaf filling technology is constantly improving. Currently, there are two main types of advanced technologies:

[0003] The first method involves mixing cementitious materials with fillers (such as soil, tailings silt, and gravel) to form a homogeneous, highly fluid mixture slurry. This mixture is then transported to the goaf via pipelines, relying solely on gravity to allow the mixture to flow freely. This technique, due to the high water content of the mixture, results in a solidified structure with high porosity and low compressive strength. Therefore, to achieve the same solidified structure strength, the amount of curing agent required is higher than that required for a mixture with a lower water content. Furthermore, to achieve gravity flow, the mixture must have a sufficiently high water content. To prevent segregation and sedimentation during transportation, admixtures that maintain fluidity but do not contribute to solidified structure strength are inevitably added. These characteristics inevitably increase the economic cost of the curing agent. Furthermore, after a period of transportation, sediment deposited on the pipe walls can harden and clog the pipes, increasing cleaning, maintenance, and repair costs.

[0004] The second method involves preparing a paste-like mortar with the curing agent and filler, which is then pumped into the goaf for filling. This technique uses a pump as the delivery power, so while the solids content of the filler is increased, the water content remains high.

[0005] In summary, in the existing goaf backfill projects, in order to ensure the high fluidity of the mixture slurry of the curing agent and filler, the water content in the mixture is high and the solid content is low, resulting in high curing agent costs and excessive moisture brought into the mine during the backfilling process, which increases safety hazards. Summary of the Invention

[0006] The purpose of the present invention is to provide a metal mine empty area filling device to solve the problem that the existing backfill device has a large safety hazard after backfilling.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a metal mine empty area filling device, including a conveying pipe, a conveying mechanism, a driving mechanism, a stirring mechanism and a backfilling pipe; wherein, one side of the conveying pipe is connected to a first supply pipe, and the other side of the conveying pipe is provided with a second supply pipe, the first supply pipe is connected to the backfill material supply mechanism, and the second supply pipe is connected to the coagulant supply mechanism; the conveying mechanism is slidably arranged in the conveying pipe; the driving mechanism can drive the conveying mechanism to slide along the conveying pipe; the stirring mechanism is arranged before the area to be backfilled, the stirring mechanism is connected to the conveying pipe, the backfill material and coagulant in the conveying pipe can enter the stirring mechanism and be evenly stirred in the stirring mechanism; the backfilling pipe is connected to the stirring mechanism, and the evenly mixed material in the stirring mechanism can be backfilled into the empty area through the backfilling pipe.

[0008] In one possible implementation, the conveying mechanism includes a sliding plate, which is circular, has a diameter that is the same as the inner diameter of the conveying pipe, and a side wall of the sliding plate abuts against the inner wall of the conveying pipe. The driving mechanism includes a compressed air supply mechanism, which is arranged upstream of the first supply pipe and the second supply pipe along the conveying direction of the material. The compressed air supply mechanism can supply compressed air into the conveying pipe. A first one-way valve is provided on the first supply pipe, and a second one-way valve is provided on the second supply pipe. In the initial state, the sliding plate is arranged upstream of the first supply pipe and the second supply pipe, and the compressed air can push the sliding plate to slide along the conveying pipe.

[0009] In a possible implementation, the first supply pipe and the second supply pipe have the same inner diameter, and the thickness of the sliding plate is greater than the inner diameter of the first supply pipe.

[0010] In a possible implementation, the stirring mechanism includes a stirring barrel and a cannula, one end of the cannula is connected to the conveying pipe, the other end of the cannula is inserted into the stirring barrel, and the end of the cannula extending into the stirring barrel extends into a position near the bottom of the stirring barrel; a slide groove is provided on the inner wall of the conveying pipe, and a slider is provided on the sliding plate, which is adapted to the shape of the slide groove, and the slider is inserted in the slide groove, and when the slider abuts against one end of the slide groove, the sliding plate pushes all the materials in the conveying pipe to the top of the cannula; a locking assembly is provided on the sliding plate, and along the conveying direction of the material, when the upstream air pressure of the sliding plate is higher than a preset value, the locking assembly is unlocked, and compressed air can enter the downstream of the sliding plate and enter the stirring barrel through the cannula.

[0011] In one possible implementation, the locking assembly includes a plurality of air holes, a plurality of sliding columns and a plurality of return springs, the plurality of air holes are evenly arranged on the sliding plate, the air holes pass through the sliding plate along the axial direction of the sliding plate, the air holes correspond one-to-one to the sliding columns, the return springs correspond one-to-one to the air holes, the sliding columns are slidably arranged in the corresponding air holes, and a fixing ring is provided at the upstream end of the air hole along the material conveying direction, one end of the return spring is connected to the fixing ring in the corresponding air hole, and the other end of the return spring is connected to the sliding column in the corresponding air hole.

[0012] and a lever, having one end in pinned connection to the bottom of the drag pole, the middle portion being a pin of the linkage set, said block having a plurality of movable parts in a row being mounted on the top of the block and a plurality of movable parts in a row.

[0013] In one possible implementation, a through hole is provided on the conveying pipe, a sealing box is provided outside the conveying pipe, a sealed cavity is provided inside the sealing box, the sealed cavity is communicated with the interior of the conveying pipe through the through hole, a roller is provided for rotation in the sealed cavity, a rope is wound around the roller, the rope is connected to the sliding plate, a recovery motor is provided on the sealing box, and the power output end of the recovery motor is connected to the roller.

[0014] In a possible implementation, a connection between the through hole and the delivery pipe is chamfered.

[0015] In one possible implementation, an overflow valve is provided on the backfill pipe. When the air pressure in the mixing barrel is greater than a preset pressure, the overflow valve opens, and the air in the mixing barrel presses the material into the backfill pipe and transports it along the backfill pipe.

[0016] In a possible implementation, a pressure reducing valve is provided on the top of the mixing barrel.

[0017] The beneficial effects of the metal mine empty area filling device provided by the present invention are: compared with the existing technology, the present invention facilitates the transportation of backfill material and coagulant by setting a conveying pipeline, a conveying mechanism and a driving mechanism, and facilitates the stirring of the material before entering the backfill area by setting a stirring mechanism. Compared with the stirred material, it is easier to transport, reduces the demand for flowability during the material transportation process, and thus can reduce the water content in the material, increase the solid content in the mixed material, and prevent safety accidents caused by excessive water content of the material during the backfilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a metal mine empty area filling device provided by an embodiment of the present invention;

[0020] Figure 2 A plan view of the initial state of the metal mine empty area filling device provided by an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A magnified view of part A;

[0022] Figure 4 A plan view of another state of the metal mine empty area filling device provided by an embodiment of the present invention;

[0023] Figure 5 A schematic structural diagram of a sliding plate provided in an embodiment of the present invention;

[0024] Figure 6 A plan view of the locking assembly of the sliding plate provided by an embodiment of the present invention in an unlocked state;

[0025] Figure 7 for Figure 6 A magnified view of part B;

[0026] Figure 8 A plan view of a locking assembly of a sliding plate provided by an embodiment of the present invention in a locked state;

[0027] Figure 9 Based Figure 8 Enlarged view of part C.

[0028] Among them, the reference numerals in the figures are as follows:

[0029] 1. Conveying pipeline; 2. Sliding plate; 3. Compressed air supply mechanism; 4. Mixing barrel; 5. Backfill pipeline;

[0030] 101. First supply pipe; 102. Second supply pipe; 103. First one-way valve; 104. Second one-way valve; 105. Slide; 106. Through hole; 107. Sealing box; 108. Sealing chamber; 109. Roller; 110. Rope; 111. Recovery motor;

[0031] 201, slider; 203, air hole; 204, return spring; 205, slide column; 206, guide groove; 207, guide block; 208, air guide groove; 209, guide hole; 210, fixing ring;

[0032] 401, intubation; 402, pressure relief valve;

[0033] 501. Overflow valve. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be further explained that the drawings and implementation methods of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0036] When an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] The directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, and "several" means one or more, unless otherwise specifically defined.

[0039] The metal mine empty area filling device provided by the present invention is now described.

[0040] Please also refer to Figure 1 and Figure 2 The metal mine empty area filling device includes a conveying pipeline 1, a conveying mechanism, a driving mechanism, a stirring mechanism and a backfilling pipeline 5, wherein one side of the conveying pipeline 1 is connected to a first supply pipeline 101, and the other side of the conveying pipeline 1 is provided with a second supply pipeline 102, the first supply pipeline 101 is connected to the backfill material supply mechanism, and the second supply pipeline 102 is connected to the coagulant supply mechanism; the conveying mechanism is slidably arranged in the conveying pipeline 1; the driving mechanism can drive the conveying mechanism to slide along the conveying pipeline 1; the stirring mechanism is arranged before the area to be backfilled, the stirring mechanism is connected to the conveying pipeline 1, the backfill material and coagulant in the conveying pipeline 1 can enter the stirring mechanism and be evenly stirred in the stirring mechanism; the backfilling pipeline 5 is connected to the stirring mechanism, and the evenly mixed material in the stirring mechanism can be backfilled into the empty mining area through the backfilling pipeline 5.

[0041] The beneficial effects of the metal mine empty area filling device provided in this embodiment are: compared with the existing technology, the metal mine empty area filling device provided in this embodiment facilitates the transportation of backfill material and coagulant by setting a conveying pipe 1, a conveying mechanism and a driving mechanism, and facilitates the stirring of the material before entering the backfill area by setting a stirring mechanism. Compared with the stirred material, it is easier to transport, reduces the demand for flowability during the material transportation process, and thus can reduce the water content in the material, increase the solid content in the mixed material, and prevent safety accidents caused by excessive water content of the material during the backfilling process.

[0042] Combine Figure 2 and Figure 4 As shown, the conveying mechanism includes a sliding plate 2, which is circular. The diameter of the sliding plate 2 is the same as the inner diameter of the conveying pipe 1. The side wall of the sliding plate 2 abuts against the inner wall of the conveying pipe 1, so that when the sliding plate 2 slides, it can push the backfill material, curing agent and other materials in the conveying pipe 1 to move along the conveying pipe 1.

[0043] The driving mechanism includes a compressed air supply mechanism 3. Along the conveying direction of the material, the compressed air supply mechanism 3 is arranged upstream of the first supply pipe 101 and the second supply pipe 102, so as to facilitate the placement of the sliding plate 2 upstream of the first supply pipe 101 and the second supply pipe 102, thereby facilitating the pushing of the material entering the conveying pipe 1 from the first supply pipe 101 and the second supply pipe 102.

[0044] The compressed air supply mechanism 3 is capable of supplying compressed air into the delivery pipeline 1. A first one-way valve 103 is provided on the first supply pipeline 101, and a second one-way valve 104 is provided on the second supply pipeline 102. In the initial state, the sliding plate 2 is positioned upstream of the first and second supply pipelines 101, 102, and the compressed air can push the sliding plate 2 to slide along the delivery pipeline 1. The provision of the first and second one-way valves 103, 104 prevents the compressed air from being exhausted through the first and second supply pipelines 101, 102, thereby facilitating the movement of the sliding plate 2.

[0045] As a preferred solution, the inner diameters of the first supply pipe 101 and the second supply pipe 102 are the same, and the thickness of the sliding plate 2 is greater than the inner diameter of the first supply pipe 101, so that when the sliding plate 2 moves along the conveying pipe 1, the space on the front and rear sides of the sliding plate 2 will not be connected through the first supply pipe 101 or the second supply pipe 102, thereby facilitating the compressed air to push the sliding plate 2 to move.

[0046] like Figure 2 and Figure 4 As shown, the stirring mechanism includes a stirring barrel 4 and a cannula 401. One end of the cannula 401 is connected to the conveying pipe 1, and the other end of the cannula 401 is inserted into the stirring barrel 4. The end of the cannula 401 extending into the stirring barrel 4 extends near the bottom of the stirring barrel 4. A chute 105 is provided on the inner wall of the conveying pipe 1, and a slider 201 is provided on the sliding plate 2. The slider 201 is adapted to the shape of the chute 105. The slider 201 is inserted into the chute 105. When the slider 201 abuts one end of the chute 105, the sliding plate 2 pushes all the materials in the conveying pipe 1 into the top of the cannula 401. The sliding plate 2 is provided with a locking assembly. When the air pressure upstream of the sliding plate 2 exceeds a preset value along the conveying direction of the material, the locking assembly is unlocked, allowing compressed air to enter the downstream of the sliding plate 2 and enter the stirring barrel through the cannula 401.

[0047] The setting of the slider 201 and the slide groove 105 can facilitate the fixing of the sliding plate 2 when it is moved to a preset position. At this time, with the injection of compressed air, the air pressure in the conveying pipe 1 upstream of the sliding plate 2 will gradually increase along the conveying direction of the material until it exceeds the preset value. The locking assembly is unlocked, and the compressed air will enter the mixing barrel 4 through the insert tube 401. Since the bottom end of the insert tube 401 is set at a position close to the bottom end of the mixing barrel 4, the air will rise in the mixing barrel 4, thereby achieving the purpose of stirring the material.

[0048] Combine Figure 5 、 Figure 6 and 7 As shown, the locking assembly includes a plurality of air holes 203, a plurality of sliding posts 205 and a plurality of return springs 204. The plurality of air holes 203 are evenly arranged on the sliding plate 2. The air holes 203 penetrate the sliding plate 2 along the axial direction of the sliding plate 2. The air holes 203 correspond one-to-one to the sliding posts 205. The return springs 204 correspond one-to-one to the air holes 203. The sliding posts 205 are slidably arranged in the corresponding air holes 203. Along the conveying direction of the material, a fixing ring 210 is provided at one end of the air hole 203 close to the upstream. One end of the return spring 204 is connected to the fixing ring 210 in the corresponding air hole 203, and the other end of the return spring 204 is connected to the sliding post 205 in the corresponding air hole 203.

[0049] When the air pressure in the delivery pipe 1 upstream of the sliding plate 2 increases, the sliding column 205 will be pushed to move downstream of the sliding plate 2 until the sliding column 205 releases the blockage of the air hole 203. At this time, the compressed air can enter the other side of the sliding plate 2 through the air hole 203.

[0050] Combine Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, a guide groove 206 is provided on the side wall of the air hole 203, and the guide groove 206 is arranged along the axial direction of the sliding plate 2. Along the conveying direction of the material, one end of the guide groove 206 is flush with the downstream end of the sliding plate 2, and the other end of the guide groove 206 is spaced apart from the other end of the sliding plate 2; a guide block 207 is provided on the sliding column 205, and the length of the guide block 207 is the same as the length of the guide groove 206. When the return spring 204 is in the natural state, the downstream end of the sliding column 205 is flush with the downstream end of the sliding plate 2. The downstream end is flush; an air guide groove 208 is provided on the sliding plate 2, and the air guide groove 208 is extended along the axial direction of the sliding plate 2. Along the conveying direction of the material, one end of the air guide groove 208 is flush with the upstream end of the sliding plate 2, and the other end of the air guide groove 208 is spaced apart from the other end of the sliding plate 2, and the sum of the length of the air guide groove 208 and the length of the guide block 207 is less than the thickness of the sliding plate 2; a guide hole 209 is provided on the guide block 207, and the guide hole 209 extends along the axial direction of the sliding plate 2 and passes through the guide block 207.

[0051] When the air pressure in the conveying pipeline 1 upstream of the sliding plate 2 is lower than the preset value, the air guide groove 208 and the guide groove 206 are not connected. At this time, the compressed air upstream of the sliding plate 2 cannot enter the conveying pipeline 1 downstream of the sliding plate 2; when the air pressure in the conveying pipeline 1 upstream of the sliding plate 2 is higher than the preset value, the sliding column 205 slides along the air hole 203 until the air guide groove 208 and the guide groove 206 are connected. Because the guide block 207 is provided with a guide hole 209, at this time, the conveying pipelines 1 on both sides of the sliding plate 2 are connected through the air hole 203, the guide groove 206 and the air guide groove 208. At this time, the compressed air in the conveying pipeline 1 upstream of the sliding plate 2 can enter the conveying pipeline 1 downstream of the sliding plate 2.

[0052] like Figure 2 and Figure 3 A through hole 106 is provided on the conveying pipe 1, and a sealing box 107 is provided outside the conveying pipe 1. A sealing chamber 108 is provided in the sealing box 107. The sealing chamber 108 is communicated with the interior of the conveying pipe 1 through the through hole 106. A roller 109 is provided for rotation in the sealing chamber 108, and a rope 110 is wound around the roller 109. The rope 110 is connected to the sliding plate 2. A recovery motor 111 is provided on the sealing box 107, and the power output end of the recovery motor 111 is connected to the roller 109, so that the sliding plate 2 can be reset when it moves to the end of the conveying pipe 1 close to the mixing barrel 4, thereby facilitating the next material transportation.

[0053] Preferably, the connection between the through hole 106 and the conveying pipe 1 is chamfered to reduce wear on the rope 110 .

[0054] like Figure 2 and Figure 4 As shown, an overflow valve 501 is provided on the backfill pipe. When the air pressure in the mixing barrel is greater than the preset air pressure, the overflow valve 501 opens, and the air in the mixing barrel presses the material into the backfill pipe 5 and transports it along the backfill pipe 5, so that when the air pressure inside the mixing barrel 4 is higher than the preset value, the compressed air in the mixing barrel 4 can press the material in the mixing barrel 4 into the area to be backfilled.

[0055] Finally, a pressure reducing valve 402 is provided on the top of the mixing barrel. When the material in the mixing barrel 4 is backfilled, the mixing barrel 4 is depressurized to facilitate the entry of new material into the mixing barrel 4.

[0056] When the metal mine empty area filling device of the present invention is in use, the material for backfilling is first input into the conveying pipe 1 through the first supply pipe 101 and the second supply pipe 102, and then the compressed air supply mechanism 3 drives the sliding plate 2 to slide, pushing the material into the mixing barrel 4, and the compressed air supply mechanism 3 is closed. The sliding plate 2 is then reset by the rope 110, and the above steps are repeated until the mixing barrel 4 is filled. When the sliding plate 2 moves for the last time, the compressed air supply mechanism 3 does not stop supplying, and the rope 110 drives the sliding plate 2 to reset until the material in the mixing barrel 4 is backfilled. The compressed air supply mechanism 3 is closed, and the pressure reducing valve 402 is opened to reduce the pressure in the mixing barrel 4.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A metal mine empty area filling device, characterized in that: include: A delivery pipeline (1) is connected to a first supply pipeline (101) on one side, and a second supply pipeline (102) is provided on the other side of the delivery pipeline (1), wherein the first supply pipeline (101) is connected to a backfill material supply mechanism, and the second supply pipeline (102) is connected to a coagulant supply mechanism; A conveying mechanism is slidably arranged in the conveying pipe (1), the conveying mechanism comprises a sliding plate (2), the sliding plate (2) is circular, the diameter of the sliding plate (2) is the same as the inner diameter of the conveying pipe (1), and the side wall of the sliding plate (2) abuts against the inner wall of the conveying pipe (1); A driving mechanism capable of driving the conveying mechanism to slide along the conveying pipe (1); A stirring mechanism is provided before the area to be backfilled, the stirring mechanism being connected to the delivery pipe (1), and the backfill material and coagulant in the delivery pipe (1) can enter the stirring mechanism and be evenly stirred in the stirring mechanism; A backfill pipe (5) is connected to the stirring mechanism, and the uniformly mixed material in the stirring mechanism can be backfilled into the empty mining area through the backfill pipe (5); The stirring mechanism comprises a stirring barrel (4) and a cannula (401), one end of the cannula (401) is connected to the delivery pipe (1), the other end of the cannula (401) is inserted into the stirring barrel (4), and the end of the cannula (401) inserted into the stirring barrel (4) is inserted into a position close to the bottom of the stirring barrel (4); a chute (105) is provided on the inner wall of the delivery pipe (1), and a slider (201) is provided on the sliding plate (2), and the slider (201) is adapted to the shape of the chute (105). The slider (201) is inserted into the chute (105), and when the slider (201) abuts against one end of the chute (105), the sliding plate (2) pushes all the materials in the conveying pipe (1) above the insert tube (401); a locking assembly is provided on the sliding plate (2), and when the air pressure upstream of the sliding plate (2) is higher than a preset value along the conveying direction of the material, the locking assembly is unlocked, and compressed air can enter the downstream of the sliding plate (2) and enter the mixing barrel through the insert tube (401); The locking assembly includes a plurality of air holes (203), a plurality of sliding columns (205) and a plurality of return springs (204), wherein the plurality of air holes (203) are evenly arranged on the sliding plate (2), and the air holes (203) penetrate the sliding plate (2) along the axial direction of the sliding plate (2), the air holes (203) correspond one-to-one to the sliding columns (205), and the return springs (204) correspond one-to-one to the air holes (203), and the sliding columns (205) are slidably arranged in the corresponding air holes (203). Along the conveying direction of the material, a fixing ring (210) is provided at one end of the air hole (203) close to the upstream end, one end of the return spring (204) is connected to the fixing ring (210) in the corresponding air hole (203), and the other end of the return spring (204) is connected to the sliding column (205) in the corresponding air hole (203).

2. The metal mine empty area filling device according to claim 1, characterized in that: The driving mechanism includes a compressed air supply mechanism (3). Along the conveying direction of the material, the compressed air supply mechanism (3) is arranged upstream of the first supply pipe (101) and the second supply pipe (102). The compressed air supply mechanism (3) can supply compressed air into the conveying pipe (1). The first supply pipe (101) is provided with a first one-way valve (103), and the second supply pipe (102) is provided with a second one-way valve (104). In the initial state, the sliding plate (2) is arranged upstream of the first supply pipe (101) and the second supply pipe (102), and the compressed air can push the sliding plate (2) to slide along the conveying pipe (1).

3. The metal mine empty area filling device according to claim 2, characterized in that: The first supply pipe (101) and the second supply pipe (102) have the same inner diameter, and the thickness of the sliding plate (2) is greater than the inner diameter of the first supply pipe (101).

4. The metal mine empty area filling device according to claim 3, characterized in that: A guide groove (206) is provided on the side wall of the air hole (203), and the guide groove (206) is arranged along the axial extension of the sliding plate (2). Along the conveying direction of the material, one end of the guide groove (206) is flush with the downstream end of the sliding plate (2), and the other end of the guide groove (206) is spaced apart from the other end of the sliding plate (2); a guide block (207) is provided on the sliding column (205), and the length of the guide block (207) is the same as the length of the guide groove (206). When the return spring (204) is in a natural state, the downstream end of the sliding column (205) is flush with the downstream end of the sliding plate (2); An air guide groove (208) is provided on the sliding plate (2), and the air guide groove (208) is extended along the axial direction of the sliding plate (2). Along the conveying direction of the material, one end of the air guide groove (208) is flush with the upstream end of the sliding plate (2), and the other end of the air guide groove (208) is spaced apart from the other end of the sliding plate (2), and the sum of the length of the air guide groove (208) and the length of the guide block (207) is less than the thickness of the sliding plate (2); A guide hole (209) is provided on the guide block (207), and the guide hole (209) extends along the axial direction of the sliding plate (2) and passes through the guide block (207).

5. The metal mine empty area filling device according to claim 4, characterized in that: The conveying pipe (1) is provided with a through hole (106), the conveying pipe (1) is provided with a sealing box (107) outside, the sealing box (107) is provided with a sealing cavity (108), the sealing cavity (108) is communicated with the interior of the conveying pipe (1) through the through hole (106), a roller (109) is rotatably provided in the sealing cavity (108), a rope (110) is wound around the roller (109), the rope (110) is connected to the sliding plate (2), a recovery motor (111) is provided on the sealing box (107), and a power output end of the recovery motor (111) is connected to the roller (109).

6. The metal mine empty area filling device according to claim 5, characterized in that: The connection between the through hole (106) and the delivery pipe (1) is chamfered.

7. The metal mine empty area filling device according to claim 6, characterized in that: The backfill pipe is provided with an overflow valve (501). When the air pressure in the mixing barrel is greater than a preset air pressure, the overflow valve (501) opens, and the air in the mixing barrel presses the material into the backfill pipe (5), and the material is transported along the backfill pipe (5).

8. The metal mine empty area filling device according to claim 7, characterized in that: A pressure reducing valve (402) is provided on the top of the mixing barrel.

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