Goaf paste filling device

Abstract

The utility model discloses a goaf paste filling device, which relates to the technical field of coal mine goaf treatment and comprises a material conveying mechanism and a plurality of material blocking units. The material blocking unit comprises a hydraulic support, a hydraulic cylinder, a vertical baffle, transverse material blocking pieces and an air bag, the vertical baffle is connected with a hydraulic support base through the hydraulic cylinder, and X layers of transverse material blocking pieces are fixed to the side, back on to the hydraulic support, of the vertical baffle; the material conveying mechanism comprises a main material conveying pipeline, branch material conveying pipelines and layered flexible pipelines. A closed space is defined by the goaf through the vertical baffles and the air bags, and paste filling is facilitated; by arranging the transverse striker plates, the space of the side, back on to the hydraulic support, of the vertical baffle is divided into the multiple filling areas, the filling areas are sequentially filled from bottom to top, coarse aggregate in paste in the filling areas is blocked by the transverse striker plates at the bottoms of the filling areas and cannot sink to the filling area on the next layer, and therefore the separation degree of the paste is reduced, and the separation efficiency of the paste is improved. The filling effect is improved and the quality of the filling body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine goaf management, in particular to a goaf paste filling device. Background Art

[0002] For goaf areas left over from underground mining, the treatment methods usually fall into four categories: sealing, collapse, reinforcement, and filling. The method of using paste to fill goaf areas has become relatively mature in the mining of medium-thick gently inclined, inclined, and extremely inclined coal seams in my country. The concentration of the paste is highly correlated with its properties. The higher the concentration of the paste, the less water seepage, segregation, and stratification, and the more integrated the filling body is, but the fluidity is also worse. The self-flowing diffusion distance is limited, and there is a certain self-flowing sedimentation slope, which has a certain impact on the filling top.

[0003] For the filling of the goaf of near-horizontal coal seams, since the paste cannot be filled from high to low like the inclined coal seams, a good filling self-enclosed area cannot be formed. The patent with application number CN201810200253.1 discloses a near-horizontal coal seam longwall fully-mechanized mining cementing filling equipment and method, which builds a sealed filling space behind the working face by raising the filling baffle; then fill the filling space, and after the entire working face is completely filled and the cementing material solidifies, click the lifting switch to lower the filling baffle, and start the lagging jack to push the filling baffle until the filling operation of the entire near-horizontal coal seam longwall fully-mechanized mining cementing filling working face is completed.

[0004] In the above patent, when the filling paste concentration is high, there is a problem of poor paste fluidity, and it is difficult for such paste to fill the goaf under gravity flow. In the process of the paste flowing over a large range in the goaf, the larger the flow range, the greater the degree of slurry segregation, and the coarse aggregate in the paste sinks, resulting in coarse and fine particle classification, uneven sedimentation, and potential safety hazards in the filling. When the filling paste concentration is low, it is easier for the paste to fill the goaf under gravity flow, but the lower the concentration of the paste, the greater the degree of slurry segregation during the flow, and the coarse aggregate in the paste will also sink. Utility Model Content

[0005] Based on this, it is necessary to provide a paste filling device for goaf to address the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a paste filling device for goaf area, including a material feeding mechanism and a plurality of material blocking units;

[0007] The material blocking unit includes a hydraulic support, a hydraulic cylinder, a vertical baffle, a horizontal material blocking member and an airbag. The vertical baffle is connected to the hydraulic support base through a hydraulic cylinder. X layers of horizontal material blocking members are fixed on the side of the vertical baffle facing away from the hydraulic support. The horizontal material blocking members are used to block the coarse aggregate in the paste from sinking to reduce the degree of concrete segregation. The X layers of horizontal material blocking members divide the space on the side of the vertical baffle facing away from the hydraulic support into X+1 filling areas, and the filling areas are interconnected. The airbag is fixed to the periphery of the vertical baffle in an n-shape, and the top of the airbag can be squeezed and contacted with the roof of the coal seam to achieve sealing; X≥1;

[0008] The airbags of two adjacent material blocking units are sealed and connected by extrusion contact;

[0009] The material conveying mechanism includes a main material conveying pipeline, branch material conveying pipelines, and layered flexible pipelines. The main material conveying pipeline is equipped with branch material conveying pipelines corresponding to the material blocking units one by one, and the branch material conveying pipelines are equipped with layered flexible pipelines corresponding to the filling areas one by one. The layered flexible pipelines convey materials to the filling areas corresponding to them, and each filling area is filled in sequence from bottom to top.

[0010] Preferably, the material blocking unit also includes a material port, a guide rail, a gate plate, a connecting plate and a linear drive mechanism. The vertical baffle is provided with a material port corresponding to and connected to each filling area one by one, the material port is located in the middle of the vertical baffle, and a guide rail corresponding to the material port is fixed on the end surface of the vertical baffle on one side facing away from the horizontal material blocking member. A gate plate for opening and closing the material port is slidably installed in the guide rail, and the gate plate is slidingly and sealingly connected to the vertical baffle. A connecting port corresponding to the layered flexible pipe is provided on the gate plate, and the connecting port is connected to the layered flexible pipe, and the connecting port can be connected to the material port, the connecting plate is fixedly connected to each gate plate, and the linear drive mechanism drives the connecting plate to move linearly, so that each gate plate closes the corresponding material port in sequence from bottom to top.

[0011] Preferably, the lengths of the gate plates decrease from bottom to top, and the vertical projections of the connecting ports on the gate plates are arranged at intervals.

[0012] Preferably, the linear drive mechanism includes a motor seat, a driving motor, a bearing seat, a screw, an active bevel gear and a driven bevel gear. The motor seat and the bearing seat are fixedly mounted on the vertical baffle, the driving motor is fixedly mounted on the motor seat, the output end of the driving motor is equipped with an active bevel gear, the screw is rotatably mounted on the bearing seat, the driven bevel gear is mounted on the screw, the driven bevel gear is meshed with the active bevel gear, and the connecting plate is threadedly connected to the screw.

[0013] Preferably, the material blocking unit also includes a detection mechanism, and detection mechanisms are provided on both sides of each filling area below the topmost filling area; the detection mechanism includes a detection port, a sealing plug, a detection rod, a pressure sensor and a fixed frame, a detection port is opened on the vertical baffle, the detection port is located at the top side position of its corresponding filling area, a sealing plug is installed in the detection port for sliding sealing, a fixing frame is fixed on the end face of the vertical baffle on one side facing away from the horizontal material blocking member, a pressure sensor is installed on the fixing frame, a detection rod is installed on the detection end of the pressure sensor, and the other end of the detection rod is inserted into the detection port and connected to the sealing plug.

[0014] Preferably, the transverse material stopper is a plurality of cylinders arranged at intervals, and the cross-section of the cylinder is circular, elliptical, rectangular, triangular, rhombus or other n-gonal shapes, wherein the value of n is 4-10.

[0015] Preferably, the transverse material stopper is a plate.

[0016] Preferably, the draft angle of the transverse stopper is in the range of 0.5° to 3°.

[0017] Preferably, it also includes an inflation and deflation mechanism, which includes an air pump, a main intake pipe, a branch intake pipe, an intake solenoid valve, an exhaust pipe, an exhaust solenoid valve and an air pressure sensor. The output end of the air pump is connected to the main intake pipe, and the main intake pipe is connected to branch intake pipes corresponding to the airbags one by one. The output end of the branch intake pipe is connected to the intake end of the airbag, and the branch intake pipe is installed with an intake solenoid valve and an air pressure sensor. The exhaust end of the airbag is connected to the exhaust pipe, and the exhaust pipe is installed with a branch exhaust solenoid valve.

[0018] Compared with the prior art, the present technical solution has at least one of the following beneficial effects: the goaf is enclosed into a closed space by vertical baffles and air bags, which is convenient for filling with paste; by setting a horizontal baffle plate, the space on the side of the vertical baffle facing away from the hydraulic support is divided into multiple filling areas, and each filling area is filled in sequence from bottom to top, so that the coarse aggregate in the paste of each filling area is blocked by the horizontal baffle at the bottom and will not sink to the filling area of ​​the next layer, thereby reducing the degree of paste segregation, improving the filling effect, and ensuring the quality of the filling body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a paste filling device according to an embodiment of the utility model;

[0020] Figure 2 It is a partial schematic diagram of a right side view of a material blocking unit according to an embodiment of the utility model;

[0021] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0022] Figure 4 It is a partial left view schematic diagram of a paste filling device according to an embodiment of the utility model;

[0023] Figure 5 It is a partial schematic top view of a paste filling device according to an embodiment of the utility model;

[0024] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0025] Figure 7 This is a schematic diagram of the structure of the inflation and deflation mechanism of one embodiment of the utility model;

[0026] Figure 8 It is a partial left view of a paste filling device according to an embodiment of the utility model (the cross section of the transverse material blocking member is a rectangle);

[0027] Fig. 9 It is a partial left view of a paste filling device according to an embodiment of the utility model (the cross section of the transverse material blocking member is a triangle);

[0028] Fig.10 It is a partial left view of a paste filling device according to an embodiment of the utility model (the cross section of the transverse material blocking member is a plate);

[0029] In the figure, 1. feeding mechanism; 11. main feeding pipeline; 12. branch feeding pipeline; 13. layered flexible pipeline; 2. material blocking unit; 201. hydraulic support; 202. hydraulic cylinder; 203. vertical baffle; 204. horizontal material blocking member; 205. air bag; 206. filling area; 207. material port; 208. guide rail; 209. gate; 210. connecting plate; 211. connecting port; 212. motor seat; 213. driving motor; 214. bearing seat; 215. screw rod; 216. detection port; 217. sealing plug; 218. detection rod; 219. pressure sensor; 220. fixing frame; 3. charging and discharging mechanism; 31. air pump; 32. main air intake pipe; 33. branch air intake pipe; 34. air intake solenoid valve; 35. exhaust pipe; 36. exhaust solenoid valve; 37. air pressure sensor. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0031] See also Figures 1 to 6 As shown, an embodiment of the present application provides a paste filling device for goaf, comprising a feeding mechanism 1 and a plurality of material blocking units 2; the material blocking units 2 are arranged in a single row in the goaf.

[0032] Wherein, the material blocking unit 2 includes a hydraulic support 201, a hydraulic cylinder 202, a vertical baffle 203, a horizontal material blocking member 204 and an airbag 205. The vertical baffle 203 is connected to the base of the hydraulic support 201 through the hydraulic cylinder 202. Two hydraulic cylinders 202 are provided to improve the stability of the movement of the vertical baffle 203. X layers of horizontal material blocking members 204 are fixed on the side of the vertical baffle 203 facing away from the hydraulic support 201, and X ≥ 1. In this embodiment, X is set to 3. The horizontal material blocking members 204 are used to prevent the coarse aggregate in the paste from sinking to reduce the degree of concrete segregation. In this embodiment, the horizontal material blocking members 204 are arranged as a plurality of spaced columns. The gaps between adjacent columns can allow finer particles to pass through and limit the passage of coarse aggregate in the paste, thereby preventing the coarse aggregate in the paste from sinking. The cross section of the column is circular. In other embodiments, please refer to Figure 8 and Fig. 9 As shown, the cross section of the column can also be a rectangle, a triangle, or an ellipse, a rhombus, or other n-sided polygons (not shown), where the value of n is 4 to 10, or refer to Fig.10 As shown, the horizontal material stopper 204 is provided as a plate body, and the length of the plate body is less than the length of the vertical stopper 203;

[0033] The three-layer horizontal material blocking member 204 divides the space on one side of the vertical baffle 203 facing away from the hydraulic support 201 into four filling areas 206, and the filling areas 206 are interconnected; the airbag 205 is fixed to the periphery of the vertical baffle 203 in an N shape, and the top of the airbag 205 can be squeezed and contacted with the roof of the coal seam to achieve sealing after being inflated; thereby facilitating smooth filling of the paste in the filling area 206 at the top, and preventing a large amount of paste from leaking from the top of the vertical baffle 203;

[0034] The air bags 205 of two adjacent material blocking units 2 are sealed and connected by extrusion contact, so that each material blocking unit 2 can enclose a part of the goaf area into a closed space for filling;

[0035] The feeding mechanism 1 includes a main feeding pipeline 11, a branch feeding pipeline 12, and a layered flexible pipeline 13. The input end of the main feeding pipeline 11 is connected to the paste preparation equipment. The paste preparation equipment adopts the existing technology. After the paste is prepared, the paste is transported to the main feeding pipeline 11 through the pump body; the main feeding pipeline 11 is equipped with branch feeding pipelines 12 corresponding to the blocking units 2 one by one, and the branch feeding pipelines 12 are arranged in a vertical position. The branch feeding pipelines 12 are equipped with layered flexible pipelines 13 corresponding to the filling areas 206 one by one. The layered flexible pipelines 13 have a certain flexibility and can swing laterally after being subjected to force; the layered flexible pipelines 13 feed the corresponding filling areas 206, and fill each filling area 206 in sequence from bottom to top. Each filling area 206 is filled from bottom to top in sequence, so that when the paste in the upper filling area 206 is separated, the coarse aggregate is blocked by the horizontal blocking member 204 and will not sink to the filling area 206 of the next layer, which can reduce the degree of paste separation, improve the filling effect, and ensure the quality of the filling body.

[0036] In order to facilitate the feeding of materials from the layered flexible pipe 13 to the filling area 206, the material blocking unit 2 is provided, which also includes a material port 207, a guide rail 208, a gate 209, a connecting plate 210 and a linear drive mechanism. The vertical baffle 203 is provided with a material port 207 corresponding to and connected to each filling area 206. The material port 207 is located in the middle of the vertical baffle 203. A guide rail 208 corresponding to the material port 207 is fixed on the end surface of the vertical baffle 203 facing away from the horizontal material blocking member 204. The guide rail 208 is slidably mounted in the guide rail 208. A gate plate 209 for opening and closing the material port 207 is provided, the gate plate 209 is slidingly and sealingly connected to the vertical baffle 203, a connecting port 211 corresponding to the layered flexible pipe 13 is opened on the gate plate 209, the connecting port 211 is connected to the layered flexible pipe 13, the connecting port 211 can be connected to the material port 207, a connecting plate 210 is fixedly connected to each gate plate 209, and a linear drive mechanism drives the connecting plate 210 to move linearly, so that each gate plate 209 closes the corresponding material port 207 in sequence from bottom to top.

[0037] In order to enable each gate plate 209 to sequentially close the corresponding material opening 207 from bottom to top, that is, when the gate plate 209 of the upper layer closes the corresponding material opening 207, the gate plate 209 of the lower layer always closes the corresponding material opening 207, the length of each gate plate 209 from bottom to top is sequentially reduced, and the vertical projections of the communication openings 211 on each gate plate 209 are arranged at intervals. In this way, by setting the length of the gate plate 209 of the lower layer longer, thereby increasing its closed distance, when the gate plate 209 of the upper layer closes the corresponding material opening 207, the gate plate 209 of the lower layer always closes the corresponding material opening 207.

[0038] In order to facilitate driving the gate 209 to close the material inlet 207, a linear drive mechanism is set up, including a motor seat 212, a driving motor 213, a bearing seat 214, a screw 215, an active bevel gear and a driven bevel gear. The motor seat 212 and the bearing seat 214 are both fixedly mounted on the vertical baffle 203, the driving motor 213 is fixedly mounted on the motor seat 212, and the output end of the driving motor 213 is equipped with an active bevel gear. The screw 215 is rotatably mounted on the bearing seat 214, and the driven bevel gear is installed on the screw 215. The driven bevel gear is meshed and connected with the active bevel gear, and the connecting plate 210 is threadedly connected with the screw 215. The driving motor 213 uses a stepper motor. The driving motor 213 drives the driven bevel gear and the screw 215 to rotate through the active bevel gear. The screw 215 drives the connecting plate 210 to move linearly. The connecting plate 210 drives each gate plate 209 to move. When the driving motor 213 rotates forward, each time the connecting plate 210 is driven to move a certain distance, a gate plate 209 is added to close the corresponding material opening 207, until the uppermost gate plate 209 closes the uppermost material opening 207. After the paste is filled and the filling body is solidified, the driving motor 213 rotates in the opposite direction to drive the connecting plate 210 and each gate plate 209 to reset.

[0039] In this embodiment, the paste is transported to the branch feed pipeline 12 and the layered flexible pipeline 13 through the main feed pipeline 11; first, the connecting port 211 of the gate plate 209 of the lowest layer is connected with the material port 207 of the lowest layer, and the gate plates 209 of other layers close the material port 207 of the corresponding layers, so that the paste in the branch feed pipeline 12 can only enter the layered flexible pipeline 13 of the lowest layer, and then enter the filling area 206 of the lowest layer; after the filling area 206 of the lowest layer is filled with paste, the driving motor 213 drives the connecting plate 210 to move a distance, so that the gate plate 209 of the lowest layer closes the material port 207 of the lowest layer, and the connecting port 211 of the gate plate 209 of the second-to-last layer is connected with the material port 207 of the second layer, so that the paste in the branch feed pipeline 12 can only enter the layered flexible pipeline 13 of the second-to-last layer, and then enter the filling area 206 of the second-to-last layer, and so on. The cycle is repeated, so that each filling area 206 is filled in sequence from bottom to top. The coarse aggregate in the paste of each filling area 206 is blocked by the transverse material blocking member 204 at the bottom thereof and will not sink to the filling area 206 of the next layer, thereby reducing the degree of paste segregation, improving the filling effect, and ensuring the quality of the filling body.

[0040] Furthermore, since the transverse material stopper 204 is inserted into the paste, the solidified filling body has a channel formed by the transverse material stopper 204, which can reduce the paste required for filling and reduce the filling cost.

[0041] In a preferred embodiment, in order to detect whether the paste fills the filling area 206, refer to Figure 1 , Figure 3 , 10As shown, the material blocking unit 2 is provided with a detection mechanism, and detection mechanisms are provided on both sides of each filling area 206 below the top filling area 206; the detection mechanism includes a detection port 216, a sealing plug 217, a detection rod 218, a pressure sensor 219 and a fixing frame 220, a detection port 216 is opened on the vertical baffle plate 203, the detection port 216 is located at the top side position of its corresponding filling area 206, a sealing plug 217 is installed in the detection port 216 for sliding sealing, a fixing frame 220 is fixed on the end face of the vertical baffle plate 203 on one side facing away from the horizontal material blocking member 204, a pressure sensor 219 is installed on the fixing frame 220, a detection rod 218 is installed at the detection end of the pressure sensor 219, and the other end of the detection rod 218 is inserted into the detection port 216 and connected to the sealing plug 217. Since the material port 207 is located in the middle of the vertical baffle 203, the paste moves from the middle of the filling area 206 to both sides. By setting detection mechanisms on both sides of the top of the filling area 206, it is easy to detect whether the paste fills the filling area 206. Because if the paste flows to both sides of the top of the filling area 206, it must have already filled the filling area 206. When the paste concentration is high, when the paste in the middle is filled to the top of the filling area 206, it will contact the horizontal material blocking piece 204 at the top of the filling area 206. The horizontal material blocking piece 204 generates resistance to the paste, prompting the paste to move to both sides at an accelerated speed. When the filling area 206 is full of paste, the height of the paste is higher than the detection port 216, and the paste will generate pressure on the sealing plug 217. The pressure acts on the pressure sensor 219 through the detection rod 218. The pressure is detected by the pressure sensor 219. The amount of paste filled in the filling area 206 can be determined by the size of the pressure, and then it can be determined whether the paste fills the filling area 206.

[0042] The top edge of the airbag 205 has an arc surface. When the airbags 205 of two adjacent blocking units 2 are inflated and sealed, there is a gap between the arc surfaces of the top edges of the two airbags 205. By observing whether there is paste leakage in the gap, it can be determined whether the paste fills the topmost filling area 206.

[0043] In a preferred embodiment, in order to facilitate the hydraulic cylinder 202 to drive the vertical baffle 203 forward, the horizontal material blocking member 204 can be smoothly demoulded and separated from the filling body. Figure 1 and Figure 5 As shown, the draft angle of the transverse material stopper 204 is set to be in the range of 0.5° to 3°. By setting the transverse material stopper 204 to have a certain draft angle, the transverse material stopper 204 can be easily separated from the filling body.

[0044] In a preferred embodiment, to facilitate the inflation and deflation of the airbag 205, refer to Figure 7As shown, an air charging and discharging mechanism 3 is also provided, and the air charging and discharging mechanism 3 includes an air pump 31, a main air intake pipe 32, a branch air intake pipe 33, an air intake solenoid valve 34, an exhaust pipe 35, an exhaust solenoid valve 36 and an air pressure sensor 37. The output end of the air pump 31 is connected to the main air intake pipe 32, and the main air intake pipe 32 is connected to a branch air intake pipe 33 corresponding to the airbag 205 one by one, and the output end of the branch air intake pipe 33 is connected to the air intake end of the airbag 205, and the branch air intake pipe 33 is installed with an air intake solenoid valve 34 and an air pressure sensor 37, and the exhaust end of the airbag 205 is connected to the exhaust pipe 35, and the exhaust pipe 35 is installed with a branch exhaust solenoid valve 36. When the airbag 205 is inflated, the exhaust solenoid valve 36 closes the exhaust pipe 35, the air pump 31 works, and inflates the branch air intake pipes 33 and the airbag 205 through the main air intake pipe 32. The air pressure in the airbag 205 is detected by the air pressure sensor 37, so as to determine whether the airbag 205 is full of air. When the air pressure in the airbag 205 detected by the air pressure sensor 37 reaches a preset range, the air intake solenoid valve 34 closes the branch air intake pipe 33, so that the airbag 205 remains closed, and the air pressure sensor 37 always detects the air pressure inside the airbag 205. When the airbag 205 is deflated, the exhaust solenoid valve 36 opens, and the gas in the airbag 205 is discharged through the exhaust pipe 35.

[0045] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A paste filling device for goaf area, It is characterized in that It comprises a material feeding mechanism (1) and a plurality of material blocking units (2); The material blocking unit (2) comprises a hydraulic support (201), a hydraulic cylinder (202), a vertical baffle (203), a transverse material blocking member (204) and an air bag (205); the vertical baffle (203) is connected to the base of the hydraulic support (201) via the hydraulic cylinder (202); a side of the vertical baffle (203) facing away from the hydraulic support (201) is fixed with X layers of transverse material blocking members (204); the transverse material blocking members (204) are used to The coarse aggregate in the paste is prevented from sinking, so as to reduce the degree of concrete segregation; X layers of horizontal material blocking members (204) divide the space on one side of the vertical baffle (203) facing away from the hydraulic support (201) into X+1 filling areas (206), and the filling areas (206) are interconnected; the airbag (205) is fixed to the periphery of the vertical baffle (203) in an n-shape, and the top of the airbag (205) can be squeezed and contacted with the roof of the coal seam to achieve sealing; X≥1; The air bags (205) of two adjacent material blocking units (2) are sealed and connected by extrusion contact; The material conveying mechanism (1) comprises a main material conveying pipeline (11), branch material conveying pipelines (12), and layered flexible pipelines (13); the main material conveying pipeline (11) is provided with branch material conveying pipelines (12) corresponding one-to-one to the material blocking units (2); and the branch material conveying pipelines (12) are provided with layered flexible pipelines (13) corresponding one-to-one to the filling areas (206); the layered flexible pipelines (13) convey material to the filling areas (206) corresponding thereto, and each filling area (206) is filled in sequence from bottom to top.

2. The goaf paste filling device according to claim 1, It is characterized in that The material blocking unit (2) further comprises a material port (207), a guide rail (208), a gate plate (209), a connecting plate (210) and a linear drive mechanism. The vertical baffle plate (203) is provided with a material port (207) corresponding to and connected to each filling area (206) one by one. The material port (207) is located in the middle of the vertical baffle plate (203). A guide rail (208) corresponding to the material port (207) is fixed on the end surface of the vertical baffle plate (203) on one side facing away from the horizontal material blocking member (204). A guide rail (208) for opening and closing the material port (207) is slidably installed in the guide rail (208). 7), the gate plate (209) is slidably and sealingly connected to the vertical baffle (203), the gate plate (209) is provided with a communication port (211) corresponding to the layered flexible pipe (13), the communication port (211) is connected to the layered flexible pipe (13), the communication port (211) can be connected to the material port (207), the connecting plate (210) is fixedly connected to each gate plate (209), and the linear drive mechanism drives the connecting plate (210) to move linearly, so that each gate plate (209) sequentially closes the corresponding material port (207) from bottom to top.

3. The goaf paste filling device according to claim 2, It is characterized in that The lengths of the gate plates (209) decrease from bottom to top, and the vertical projections of the communication openings (211) on the gate plates (209) are arranged at intervals.

4. The goaf paste filling device according to claim 3, It is characterized in that The linear drive mechanism comprises a motor seat (212), a drive motor (213), a bearing seat (214), a screw rod (215), a driving bevel gear and a driven bevel gear. The motor seat (212) and the bearing seat (214) are both fixedly mounted on the vertical baffle (203). The drive motor (213) is fixedly mounted on the motor seat (212). The output end of the drive motor (213) is mounted with a driving bevel gear. The screw rod (215) is rotatably mounted on the bearing seat (214). The driven bevel gear is mounted on the screw rod (215). The driven bevel gear is meshed and connected with the driving bevel gear. The connecting plate (210) is threadedly connected with the screw rod (215).

5. The goaf paste filling device according to claim 1, It is characterized in that The material blocking unit (2) further comprises a detection mechanism, and detection mechanisms are provided on both sides of each filling area (206) below the top filling area (206); the detection mechanism comprises a detection port (216), a sealing plug (217), a detection rod (218), a pressure sensor (219) and a fixing frame (220); a detection port (216) is provided on the vertical baffle plate (203), the detection port (216) is located at the top side of the corresponding filling area (206), a sealing plug (217) is installed in the detection port (216) in a sliding seal, a fixing frame (220) is fixed on the end surface of the vertical baffle plate (203) on one side facing away from the horizontal material blocking member (204), a pressure sensor (219) is installed on the fixing frame (220), a detection rod (218) is installed at the detection end of the pressure sensor (219), and the other end of the detection rod (218) is inserted into the detection port (216) and connected to the sealing plug (217).

6. The goaf paste filling device according to claim 1, It is characterized in that The transverse material blocking member (204) is a plurality of cylinders arranged at intervals, and the cross-section of the cylinder is circular, elliptical, rectangular, triangular, rhombus or other n-gonal shapes, wherein the value of n is 4-10.

7. The paste filling device for goaf according to claim 6, It is characterized in that The transverse material blocking member (204) is a plate.

8. The paste filling device for goaf according to claim 6, It is characterized in that The draft angle of the transverse material stopper (204) ranges from 0.5° to 3°.

9. The goaf paste filling device according to claim 1, It is characterized in that The air bag (205) is also provided with an air charging and discharging mechanism (3), wherein the air charging and discharging mechanism (3) comprises an air pump (31), a main air intake pipe (32), a branch air intake pipe (33), an air intake solenoid valve (34), an exhaust pipe (35), an exhaust solenoid valve (36) and an air pressure sensor (37); the output end of the air pump (31) is connected to the main air intake pipe (32); the main air intake pipe (32) is connected to branch air intake pipes (33) corresponding to the air bags (205) in a one-to-one manner; the output end of the branch air intake pipe (33) is connected to the air intake end of the air bag (205); the branch air intake pipe (33) is installed with the air intake solenoid valve (34) and the air pressure sensor (37); the exhaust end of the air bag (205) is connected to the exhaust pipe (35); the exhaust pipe (35) is installed with the branch exhaust solenoid valve (36).

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