Hydraulic support special for coal mine underground filling coal mining

Abstract

The invention discloses a special hydraulic support for underground coal mine filling coal mining, and relates to the technical field of coal mining, the special hydraulic support comprises a bottom plate, two fixing assemblies are fixedly mounted on the upper surface of the bottom plate, the two fixing assemblies are symmetrically distributed about the center line of the bottom plate, and a plurality of fixing plates are fixedly mounted on the side, close to the fixing assemblies, of the bottom plate; the multiple fixing plates are linearly distributed in the side line direction of the bottom plate, and two rotating rods are arranged between every two adjacent fixing plates. The fixing assembly is in linkage design with an adjustable lead screw transmission structure through a positioning pile, multi-assembly cooperative adjustment is achieved in combination with a synchronous belt, the static fixing mode of a traditional rigid anchoring device is broken through, the anchoring depth can be dynamically adjusted in real time according to soft and hard alternation of an underground rock stratum, fault zone distribution and mining-induced stress changes, local stress concentration is effectively dispersed, and the anchoring effect is improved. And the yield failure of the anchoring part caused by rock stratum deformation is avoided, and the anchoring stability and the anti-disturbance capacity of the support under the complex geological condition are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining, in particular to a hydraulic support special for coal mining by filling in a coal mine. BACKGROUND

[0002] A coal mine is an area where coal resources are mined by human beings in a coal-rich mining area. It is generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the ground surface, a tunnel is generally excavated underground to mine coal, which is an underground coal mine. When the distance between the coal seam and the ground surface is very close, the ground surface soil layer is directly stripped to excavate coal, which is an open-pit coal mine. Most of the coal mines in China belong to underground coal mines. The scope of a coal mine includes a very large area above and below ground and related facilities. A coal mine is a reasonable space excavated by human beings in a geological layer rich in coal, and generally includes tunnels, shafts, and mining faces, etc.

[0003] The existing technology has the following problems: under the complex geological conditions in a coal mine, the traditional fixing device generally adopts a rigid anchoring structure, the anchoring depth and angle of which are usually preset during installation and cannot be adjusted in real time according to the changes in rock strata. When soft and hard rock strata alternate, fault zones, or mining stress disturbances are encountered, the rigid anchoring member is prone to yield deformation due to local stress concentration, resulting in a sudden drop in anchoring force. In the coal mining operation in a coal mine, as the mining process advances, the space form in the coal mine continues to change dynamically, such as roof subsidence, floor heaving, and roadway cross-section shrinkage, etc., causing gaps or channels to appear between the mined-out area and the area being operated, causing the filling material to flow to the operating area under the action of the pressure difference, not only wasting filling resources and reducing the filling density of the mined-out area, but also possibly causing subsequent collapse due to insufficient strength of the filling body. SUMMARY

[0004] To solve the above technical problems, the present application provides a hydraulic support special for coal mining by filling in a coal mine, which solves the above-mentioned problems that under the complex geological conditions in a coal mine, the traditional fixing device generally adopts a rigid anchoring structure, the anchoring depth and angle of which are usually preset during installation and cannot be adjusted in real time according to the changes in rock strata. When soft and hard rock strata alternate, fault zones, or mining stress disturbances are encountered, the rigid anchoring member is prone to yield deformation due to local stress concentration, resulting in a sudden drop in anchoring force. In the coal mining operation in a coal mine, as the mining process advances, the space form in the coal mine continues to change dynamically, such as roof subsidence, floor heaving, and roadway cross-section shrinkage, etc., causing gaps or channels to appear between the mined-out area and the area being operated, causing the filling material to flow to the operating area under the action of the pressure difference, not only wasting filling resources and reducing the filling density of the mined-out area, but also possibly causing subsequent collapse due to insufficient strength of the filling body.

[0005] To achieve the above purposes, the technical solution adopted by the present application is as follows:

[0006] A hydraulic support for underground coal filling includes a base plate. Two fixing components are fixedly installed on the upper surface of the base plate, symmetrically distributed about the center line of the base plate. Several fixing plates are fixedly installed on the side of the base plate near the fixing components, linearly distributed along the edge of the base plate. Two rotating rods are rotatably connected between two adjacent fixing plates, and a connecting rod is rotatably connected to the other end of each rotating rod. The other ends of several connecting rods away from the rotating rods are connected to a reinforcing plate. Connecting plates are rotatably installed on both sides of the reinforcing plate. A partition component is provided on the left side of the base plate. A first hydraulic rod and a second hydraulic rod are provided between the partition component and the base plate. The two ends of the first hydraulic rod are rotatably connected to the connecting plate via hinge seats and the partition component, respectively. The two ends of the second hydraulic rod are rotatably connected to the connecting rod via hinge seats and the partition component, respectively. A first top plate is provided above the base plate, fixedly connected to both connecting plates. Several third hydraulic rods are rotatably connected between the base plate and the first top plate via hinge seats, symmetrically distributed about the center line of the base plate.

[0007] Preferably, a second top plate is provided on the side of the first top plate away from the separator component, and the second top plate is rotatably connected to the first top plate. A fourth hydraulic rod corresponding to the second top plate is provided below the first top plate, and the two ends of the fourth hydraulic rod are rotatably connected to the first top plate and the second top plate, respectively. A third top plate is provided on the side of the second top plate away from the first top plate, and the third top plate is rotatably connected to the second top plate. A fifth hydraulic rod is provided below the third top plate, and the two ends of the fifth hydraulic rod are rotatably connected to the second top plate and the third top plate, respectively.

[0008] Preferably, the fixing component includes a mounting plate with a through groove running through its interior. Side plates are fixedly connected to the left and right sides of the mounting plate corresponding to the through groove. A limiting plate is provided above the mounting plate, and the limiting plate is fixedly connected to both side plates. A sliding plate is provided below the limiting plate. A positioning post is rotatably installed on the bottom surface of the sliding plate corresponding to the through groove. A sliding groove is provided inside the positioning post. A rotating shaft corresponding to the sliding groove is rotatably installed on the bottom surface of the limiting plate. A first lead screw is rotatably installed on the side plate corresponding to the bottom surface of the limiting plate. The lower end of the first lead screw is rotatably connected to the mounting plate.

[0009] Preferably, a first roller is provided above the limiting plate corresponding to the first lead screw, and a second roller is provided above the limiting plate corresponding to the rotating shaft. A first synchronous belt is fitted on the outer surfaces of the first roller and the second roller. A third roller is provided between the two fixed components, and the third roller is connected to the second roller in the two fixed components through a second synchronous belt.

[0010] Preferably, the separating assembly includes a first separating plate and a second separating plate, the first separating plate abutting against the second separating plate, a plurality of second lead screws being rotatably mounted on the inner wall of the first separating plate, the plurality of second lead screws being linearly distributed along the edge direction of the first separating plate, a movable plate being fixedly mounted on the inner wall of the second separating plate corresponding to the second lead screw, the end of the second lead screw near the first separating plate being rotatably connected to the first separating plate through a bearing, the movable plate being threadedly connected to the second lead screw, and two second lead screws that are close to each other being connected by a third synchronous belt.

[0011] Preferably, a hanging lug is fixedly installed on the side of the base plate away from the separator component.

[0012] Preferably, a plurality of feed pipes are provided above the movable plate, and the plurality of feed pipes are fixedly connected to the second partition plate.

[0013] Preferably, the groove is cross-shaped.

[0014] Compared with the prior art, the advantages of the present invention are as follows: The present invention sets up a fixing component, which is linked to the positioning pile and the adjustable screw transmission structure, and combined with the synchronous belt to realize the coordinated adjustment of multiple components. This breaks through the static fixing mode of the traditional rigid anchoring device. It can dynamically adjust the anchoring depth in real time according to the alternating soft and hard rock formations, fault zone distribution and mining stress changes in the underground, effectively disperse local stress concentration, avoid anchor failure caused by rock deformation, and significantly improve the anchoring stability and anti-disturbance ability of the support under complex geological conditions.

[0015] This invention incorporates a partition component. This component, through an adjustable double-layer plate structure and dynamic displacement control via a screw drive, can automatically adjust the position of the partition plate based on real-time deformation of the downhole space (such as roof subsidence and floor bulging). This adjustment, achieved through a first and second hydraulic rod, ensures a tight fit with the deformed space boundary, effectively sealing potential gaps between the goaf and the working area. This prevents the flow of filling material due to pressure differences, avoiding resource waste and reduced density of the goaf filling. Simultaneously, it prevents the risk of subsequent collapse due to insufficient filling strength, thus improving the safety and economy of downhole mining and filling operations. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram from another perspective of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of the fixing component in this invention;

[0019] Figure 4This is a three-dimensional structural diagram of the separator component in this invention.

[0020] The diagram is labeled as follows: 1. Base plate;

[0021] 2. Fixing components; 201. Mounting plate; 202. Through groove; 203. Side plate; 204. Limiting plate; 205. Slide plate; 206. Positioning post; 207. Slide groove; 208. Rotating shaft; 209. First lead screw;

[0022] 3. Fixed plate; 4. Rotating rod; 5. Connecting rod; 6. Reinforcing plate; 7. Connecting plate;

[0023] 8. Separating assembly; 801. First separating plate; 802. Second separating plate; 803. Second lead screw; 804. Moving plate; 805. Third synchronous belt;

[0024] 9. First hydraulic rod; 10. Second hydraulic rod; 11. First top plate; 12. Third hydraulic rod; 13. Second top plate; 14. Fourth hydraulic rod; 15. Third top plate; 16. Fifth hydraulic rod; 17. First roller; 18. Second roller; 19. First synchronous belt; 20. Third roller; 21. Second synchronous belt; 22. Lug; 23. Feed pipe. Detailed Implementation

[0025] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0026] Reference Figures 1-4As shown, two fixing components 2 are fixedly installed on the upper surface of the base plate 1. The two fixing components 2 are symmetrically distributed about the center line of the base plate 1. Several fixing plates 3 are fixedly installed on the side of the base plate 1 near the fixing components 2. The fixing plates 3 are linearly distributed along the edge line of the base plate 1. Two rotating rods 4 are rotatably connected between two adjacent fixing plates 3. The other end of the rotating rods 4 is rotatably connected to a connecting rod 5. The other ends of the connecting rods 5 away from the rotating rods 4 are connected to a reinforcing plate 6. Connecting plates 7 are rotatably installed on both sides of the reinforcing plate 6. A partition component 8 is provided on the left side of the base plate 1. A first hydraulic rod 9 and a second hydraulic rod 10 are provided between the partition component 8 and the base plate 1. The two ends of the first hydraulic rod 9 are rotatably connected to the connecting plate 7 through hinge seats and the partition component 8, respectively. The two ends of the second hydraulic rod 10 are rotatably connected to the connecting rod 5 through hinge seats and the partition component 8, respectively. The equipment is equipped with a first top plate 11, which is fixedly connected to two connecting plates 7. A number of third hydraulic rods 12 are rotatably connected to the bottom plate 1 and the first top plate 11 through hinge seats. The number of third hydraulic rods 12 are symmetrically distributed about the center line of the bottom plate 1. The two ends of the third hydraulic rods 12 are rotatably connected to the bottom plate 1 and the first top plate 11 through hinge seats. The fixing component 2 enhances the connection between the equipment as a whole and the coal mine. The separating component 8 isolates the coal mine area after mining and forms a cavity. The filling paste enters the cavity through the separating component 8 to fill the cavity. The first hydraulic rod 9, the second hydraulic rod 10, the separating component 8, the reinforcing plate 6 and the connecting rod 5 form a deformable quadrilateral. When the reinforcing plate 6 and the connecting rod 5 rotate, the first hydraulic rod 9, the second hydraulic rod 10 and the separating component 8 are unfolded to ensure that the separating component 8 always maintains a vertical filling state until the separation is completed.

[0027] like Figure 2As shown, a second top plate 13 is provided on the side of the first top plate 11 away from the separating component 8. The second top plate 13 is rotatably connected to the first top plate 11. A fourth hydraulic rod 14 corresponding to the second top plate 13 is provided below the first top plate 11. The two ends of the fourth hydraulic rod 14 are rotatably connected to the first top plate 11 and the second top plate 13, respectively. A third top plate 15 is provided on the side of the second top plate 13 away from the first top plate 11. The third top plate 15 is rotatably connected to the second top plate 13. A fifth hydraulic rod 16 is provided below the third top plate 15. The two ends of the fifth hydraulic rod 16 are rotatably connected to the second top plate 13 and the third top plate 15, respectively. When the equipment supports the coal mine, the third hydraulic rod 12, the fourth hydraulic rod 14, and the fourth hydraulic rod 15... The five hydraulic rods 16 unfold sequentially. Several third hydraulic rods 12 unfold to move the first top plate 11 away from the bottom plate 1, ensuring that the first top plate 11 and the bottom plate 1 remain parallel. The top plate then drives the connecting rod 5 and the rotating rod 4 to rotate through the connecting plate 7 and the reinforcing plate 6. The first top plate 11 stops unfolding after contacting the top of the coal mine. Subsequently, the fourth hydraulic rod 14 and the fifth hydraulic rod 16 unfold sequentially. The fourth hydraulic rod 14 unfolds to rotate the second top plate 13. After the second top plate 13 contacts the top of the coal mine, the fifth hydraulic rod 16 unfolds to rotate the third top plate 15. The sequential unfolding of the third hydraulic rods 12, the fourth hydraulic rod 14, and the fifth hydraulic rod 16 reduces the danger of equipment unfolding.

[0028] like Figure 3 As shown, the fixing component 2 includes a mounting plate 201. A through groove 202 is formed inside the mounting plate 201. Side plates 203 are fixedly connected to the left and right sides of the mounting plate 201 corresponding to the through groove 202. A limiting plate 204 is provided above the mounting plate 201. The limiting plate 204 is fixedly connected to both side plates 203. A sliding plate 205 is provided below the limiting plate 204. A positioning post 206 is rotatably installed on the bottom surface of the sliding plate 205 corresponding to the through groove 202. A sliding groove 207 is formed inside the positioning post 206. A rotating part corresponding to the sliding groove 207 is rotatably installed on the bottom surface of the limiting plate 204. The rotating shaft 208 and the side plate 203 are rotatably mounted on the bottom surface of the limiting plate 204. The lower end of the first lead screw 209 is rotatably connected to the mounting plate 201. The rotating shaft 208 and the first lead screw 209 rotate simultaneously. The rotating shaft 208 drives the positioning pile 206 to rotate as a whole through the sliding groove 207. The rotation of the first lead screw 209 causes the sliding plate 205 to push the positioning pile 206 downward. The outer surface of the positioning pile 206 is provided with a threaded groove. The positioning pile 206 enters the bottom of the mine by rotating downward. The positioning pile 206 limits the bottom plate 1.

[0029] like Figure 3As shown, a first roller 17 is provided above the limiting plate 204 corresponding to the first lead screw 209, and a second roller 18 is provided above the limiting plate 204 corresponding to the rotating shaft 208. The second roller 18 is fixedly connected to the corresponding rotating shaft 208. A first synchronous belt 19 is fitted on the outer surface of the first roller 17 and the second roller 18. A third roller 20 is provided between the two fixed components 2. The third roller 20 is connected to the second roller 18 in the two fixed components 2 through the second synchronous belt 21. The third roller 20 is connected to an external power source. The third roller 20 causes the second roller 18 in the two fixed components 2 to rotate simultaneously and in the same direction through the second synchronous belt 21. The second roller 18 drives the two first rollers 17 to rotate through the first synchronous belt 19, and the two first rollers 17 rotate in the same direction. The first roller 17 is fixedly connected to the corresponding first lead screw 209. The two first lead screws 209 rotate in the same direction and have the same rotation direction, thereby making the movement of the slide plate 205 smoother.

[0030] like Figure 4 As shown, the partition assembly 8 includes a first partition plate 801 and a second partition plate 802, which abut against each other. A plurality of second lead screws 803 are rotatably mounted on the inner wall of the first partition plate 801, and are linearly distributed along the edge of the first partition plate 801. A movable plate 804 is fixedly mounted on the inner wall of the second partition plate 802 corresponding to each second lead screw 803, and is threadedly connected to the second lead screw 803. Two adjacent second lead screws 803 are connected by a third synchronous belt 805. A lead screw motor is externally connected to each second lead screw 803. Rod 803 rotates synchronously via the third synchronous belt 805. The rotation direction and the direction of rotation of several second lead screws 803 are the same, which causes the moving plate 804 to drive the second partition plate 802 to move. At the same time, since the rotation direction and the direction of rotation are the same, the moving plates 804 move in the same direction, preventing jamming. To prevent impurities and waste from falling on the first lead screw 209 and the second lead screw 803 and causing the movement to jam, a lead screw guard can be used to protect the first lead screw 209 and the second lead screw 803. The lead screw guard is an existing product, and its specific principle will not be explained in detail here.

[0031] like Figures 1-2 As shown, a hanging lug 22 is fixedly installed on the side of the base plate 1 away from the partition component 8. When the coal mining area is completed, the equipment retracts, and the traction machine moves the entire equipment to the next area through the hanging lug 22.

[0032] like Figure 4As shown, several feed pipes 23 are provided above the movable plate 804. The feed pipes 23 are fixedly connected to the second partition plate 802. A one-way valve is provided inside the feed pipe 23. The paste filling material enters the cavity through the feed pipe 23. The partition component 8 ensures the integrity of the paste after solidification. The one-way valve prevents the paste liquid from flowing back and causing a void inside the cavity.

[0033] like Figure 4 As shown, the slide groove 207 is cross-shaped. Since the rotating shaft 208 corresponds to the slide groove 207, there is a certain degree of engagement between the rotating shaft 208 and the slide groove 207, which facilitates the synchronous rotation of the rotating shaft 208 and the positioning pile 206.

[0034] Working principle: When the equipment unfolds, the third hydraulic rod 12, the fourth hydraulic rod 14, and the fifth hydraulic rod 16 unfold sequentially. The unfolding of several third hydraulic rods 12 causes the first top plate 11 and the bottom plate 1 to move away from each other, ensuring that the first top plate 11 and the bottom plate 1 remain parallel. This causes the top plate to rotate via the connecting plate 7 and the reinforcing plate 6, driving the connecting rod 5 and the rotating rod 4 to rotate. The first top plate 11 stops unfolding after contacting the top of the coal mine. Subsequently, the fourth hydraulic rod 14 and the fifth hydraulic rod 16 unfold sequentially. The unfolding of the fourth hydraulic rod 14 causes the second top plate... After the second roof plate 13 rotates and contacts the top of the coal mine, the fifth hydraulic rod 16 unfolds, causing the third roof plate 15 to rotate. Simultaneously, the second lead screw 803 and the third roller 20 rotate synchronously. The direction of rotation and the rotation direction of the second lead screw 803 are the same, causing the moving plate 804 to move the second partition plate 802. The first partition plate 801 and the second partition plate 802 unfold, and simultaneously, the first hydraulic rod 9 and the second hydraulic rod 10 unfold synchronously, ensuring that the first partition plate 801 and the second partition plate 802 remain perpendicular. 9. The second hydraulic rod 10, the partition assembly 8, the reinforcing plate 6, and the connecting rod 5 form a deformable quadrilateral. After the equipment is deployed, the first partition plate 801 and the second partition plate 802 are closed off from the underground coal mine. The third roller 20 causes the second rollers 18 in the two fixed assemblies 2 to rotate simultaneously in the same direction via the second synchronous belt 21. The second rollers 18 drive the two first rollers 17 to rotate via the first synchronous belt 19, and the two first rollers 17 rotate in the same direction. The two first screws 209 rotate in the same direction, and the two... The first lead screw 209 rotates in the same direction, making the slide plate 205 move more smoothly. The rotating shaft 208 drives the positioning pile 206 to rotate as a whole through the slide groove 207. The first lead screw 209 rotates, causing the slide plate 205 to push the positioning pile 206 downward. The outer surface of the positioning pile 206 is provided with a threaded groove. The positioning pile 206 rotates downward, causing the positioning pile 206 to enter the bottom of the mine. The positioning pile 206 limits the bottom plate 1, thereby enhancing the connection between the equipment and the coal mine and preventing the equipment from shifting during paste filling.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A hydraulic support for coal mining in a coal mine, comprising a base plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly provided with two fixed assemblies (2), the two fixed assemblies (2) are symmetrically distributed about the center line of the bottom plate (1), a plurality of fixed plates (3) are fixedly arranged on one side of the bottom plate (1) close to the fixed assembly (2), the plurality of fixed plates (3) are linearly distributed along the edge line direction of the bottom plate (1), two rotating rods (4) are rotatably connected between two fixed plates (3) close to each other, one end of the rotating rod (4) is rotatably connected with a connecting rod (5), the other end of the connecting rod (5) is rotatably connected with a reinforcing plate (6), the reinforcing plate (6) is rotatably connected with a connecting plate (7) on both sides, a separation assembly (8) is arranged on the left side of the bottom plate (1), the first hydraulic rod (9) and the second hydraulic rod (10) are arranged between the separation assembly (8) and the bottom plate (1), the two ends of the first hydraulic rod (9) are rotatably connected with the separation assembly (8) and the connecting plate (7) through the hinge seat, the two ends of the second hydraulic rod (10) are rotatably connected with the separation assembly (8) and the connecting rod (5) through the hinge seat, a first top plate (11) is arranged above the bottom plate (1), the first top plate (11) is fixedly connected with the two connecting plates (7), a plurality of third hydraulic rods (12) are rotatably connected between the bottom plate (1) and the first top plate (11) through the hinge seat, and the plurality of third hydraulic rods (12) are symmetrically distributed about the center line of the bottom plate (1).

2. The hydraulic support for coal mining in a coal mine according to claim 1, characterized in that: The side, away from the separation assembly (8), of the first top plate (11) is provided with a second top plate (13), the second top plate (13) is rotatably connected with the first top plate (11), a fourth hydraulic rod (14) corresponding to the second top plate (13) is arranged below the first top plate (11), the two ends of the fourth hydraulic rod (14) are rotatably connected with the first top plate (11) and the second top plate (13), the side, away from the first top plate (11), of the second top plate (13) is provided with a third top plate (15), the third top plate (15) is rotatably connected with the second top plate (13), a fifth hydraulic rod (16) is arranged below the third top plate (15), and the two ends of the fifth hydraulic rod (16) are rotatably connected with the second top plate (13) and the third top plate (15).

3. The hydraulic support for underground coal mining according to claim 1, characterized in that: The fixed assembly (2) comprises a mounting plate (201), a through slot (202) is arranged in the mounting plate (201), the left and right sides of the mounting plate (201) are fixedly connected with side plates (203) corresponding to the through slot (202), a limiting plate (204) is arranged above the mounting plate (201), the limiting plate (204) is fixedly connected with the two side plates (203), a sliding plate (205) is arranged below the limiting plate (204), a positioning pile (206) is rotatably arranged on the bottom surface of the sliding plate (205) corresponding to the through slot (202), a sliding groove (207) is arranged in the positioning pile (206), a rotating shaft (208) corresponding to the sliding groove (207) is rotatably arranged on the bottom surface of the limiting plate (204), a first lead screw (209) is rotatably arranged on the bottom surface of the limiting plate (204) corresponding to the side plate (203), and the lower end of the first lead screw (209) is rotatably connected with the mounting plate (201).

4. The hydraulic support for coal mine underground filling coal mining according to claim 3, characterized in that: A first roller (17) is arranged above the limiting plate (204) corresponding to the first lead screw (209), a second roller (18) is arranged above the limiting plate (204) corresponding to the rotating shaft (208), a first synchronous belt (19) is sleeved on the outer surfaces of the first roller (17) and the second roller (18), a third roller (20) is arranged between the two fixed assemblies (2), and the third roller (20) and the second rollers (18) in the two fixed assemblies (2) are connected through a second synchronous belt (21).

5. The coal mine underground filling coal mining special hydraulic support according to claim 1, characterized in that: The separation assembly (8) comprises a first separation plate (801) and a second separation plate (802), the first separation plate (801) and the second separation plate (802) are abutted, a plurality of second lead screws (803) are rotatably arranged on the inner wall of the first separation plate (801), the plurality of second lead screws (803) are linearly distributed along the edge direction of the first separation plate (801), a moving plate (804) is fixedly arranged on the inner wall of the second separation plate (802) corresponding to the second lead screw (803), one end of the second lead screw (803) close to the first separation plate (801) is rotatably connected with the first separation plate (801) through a bearing, the moving plate (804) is threadedly connected with the second lead screw (803), and two second lead screws (803) close to each other are connected through a third synchronous belt (805).

6. The coal mine underground filling coal mining special hydraulic support according to claim 1, characterized in that: The bottom plate (1) is fixedly provided with a hanging ear (22) on the side away from the separation assembly (8).

7. The coal mine underground filling coal mining special hydraulic support according to claim 5, characterized in that: A plurality of feeding pipes (23) are arranged above the moving plate (804) and fixedly connected with the second separation plate (802).

8. The hydraulic support for underground coal mining as claimed in claim 5, wherein: The sliding groove (207) is cross-shaped.

Images