Sealing structure and sealing method for rear portion of paste filling hydraulic support

Abstract

The invention discloses a sealing structure and method for the rear portion of a paste filling hydraulic support, and relates to the technical field of sealing structures, the sealing structure comprises a hydraulic support body, L-shaped supporting plates are symmetrically fixed to the rear portion of the hydraulic support body, and mounting bases are clamped and fixed to the ends, away from the hydraulic support body, of the L-shaped supporting plates through elastic clamping mechanisms; the L-shaped supporting plate and the mounting base on the left side wall of the sealing adjusting box are clamped and fixed through the elastic clamping mechanism, so that detachable and convenient mounting of the hydraulic support body and the rear sealing structure of the hydraulic support body is achieved, the rear sealing structure is convenient to disassemble and assemble, regular maintenance and overhaul are facilitated, and the working efficiency is improved. A first ejection mechanism drives an L-shaped sealing plate to press and abut the upper edge and the lower edge of the sealing barrier cloth against the top end and the bottom end of the mining roadway correspondingly, and meanwhile a second ejection mechanism drives a sealing side plate to press and abut the front edge and the rear edge of the sealing barrier cloth against the front inner wall and the rear inner wall of the mining roadway correspondingly. Therefore, all-directional sealing of the filling space is formed to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing structures, and in particular to a sealing structure and a sealing method for a rear portion of a paste-filled hydraulic support. Background Art

[0002] Coal mine paste filling mining is a mining method that uses solid waste such as coal gangue and fly ash to mix with cement and water in proportion to form a paste filling material, and transports it to the underground goaf through pipelines for filling. This technology can improve resource recovery rate, control surface subsidence, realize resource utilization of solid waste, and promote green mining. The paste filling hydraulic support is a hydraulic support used for coal mine paste filling mining. By adding an isolation device to the support, the paste slurry is prevented from leaking, and parallel operations of coal mining and filling are achieved, thereby improving production efficiency and filling rate.

[0003] The rear sealing structure of the paste filling hydraulic support is mainly composed of the hydraulic support and the rear isolation device, which usually includes telescopic isolation walls, upper sealing strips, lower sealing structures, isolation plates, jacks and other components. The telescopic isolation wall is the core component of the rear sealing structure, which is usually driven by a hydraulic cylinder and can be extended and retracted up and down to achieve sealing of the top and bottom plates, prevent slurry leakage, and improve filling quality and efficiency.

[0004] Most of the existing paste-filled hydraulic support rear sealing structures are fixed in structure and are generally installed at the rear of the paste-filled hydraulic support by bolting or welding. They are inconvenient to disassemble and assemble, resulting in inconvenience in regular maintenance and overhaul, and inconvenience in use. In addition, the existing paste-filled hydraulic support rear sealing structure cannot fully seal the mining tunnel during the paste filling process, resulting in a large number of gaps between the sealing structure and the mining tunnel, and a greater risk of leakage of the filling paste, thereby affecting the paste filling quality. Therefore, the present invention proposes a paste-filled hydraulic support rear sealing structure and sealing method to solve the problems existing in the prior art. Summary of the Invention

[0005] In response to the above problems, the purpose of the present invention is to propose a rear sealing structure and sealing method for a paste-filled hydraulic support, so as to solve the problem that the rear sealing structure of the existing paste-filled hydraulic support is not convenient for disassembly and assembly, resulting in inconvenience for regular maintenance and overhaul, and the mining tunnel cannot be effectively sealed during the paste filling process, resulting in a greater risk of leakage of the filling paste.

[0006] In order to achieve the objectives of the present invention, the present invention is implemented through the following technical solutions: a paste-filled hydraulic support rear sealing structure and sealing method, including a hydraulic support body, wherein an L-shaped support plate is symmetrically fixed to the rear of the hydraulic support body, and the end of the L-shaped support plate away from the hydraulic support body is clamped and fixed with a mounting seat by an elastic clamping mechanism, and two groups of mounting seats are commonly fixed with a sealing adjustment box at one end away from the L-shaped support plate, and the sealing adjustment box is provided with a first support plate driven to be displaced by a first ejection mechanism on the upper and lower sides, and a second support plate driven to be displaced by a second ejection mechanism on the side of the sealing adjustment box away from the hydraulic support body; a first slide is fixed to the end of the first support plate away from the hydraulic support body, and a second slide is fixed to the opposite end of the two groups of the second support plates; the front and rear sides of the first slide are both slidably connected with an L-shaped sealing plate, and a sealing barrier cloth is fixedly bonded to the side of the L-shaped sealing plate away from the first slide; the upper and lower sides of the second slide are slidably provided with sealing side plates adapted to the position of the L-shaped sealing plate, and a filling pipe is fixed on the L-shaped sealing plate located above.

[0007] A further improvement is that the outer wall of the two groups of L-shaped sealing plates distributed symmetrically in front and back away from the first slide is commonly fixed with a first elastic sealing pad, and the outer wall of the two groups of sealing side plates distributed symmetrically in top and bottom away from the second slide is commonly fixed with a second elastic sealing pad.

[0008] Further improvements are: a first sliding sleeve is fixed on the side of the L-shaped sealing plate close to the first slide plate, and a first positioning bolt is threaded through the side of the first sliding sleeve away from the L-shaped sealing plate. First positioning holes that are compatible with the first positioning bolt are equidistantly provided on the first slide plate.

[0009] Further improvements are: a second sliding sleeve is fixed on the side of the sealing side plate close to the second slide plate, and a second positioning bolt is threaded through the side of the second sliding sleeve away from the sealing side plate. Second positioning holes that are compatible with the second positioning bolt are equidistantly opened on the second slide plate.

[0010] Further improvements are: a vertical cavity and a longitudinal cavity are opened inside the sealing adjustment box, the first ejection mechanism includes a first bidirectional screw rod rotatably connected to the vertical cavity and driven to rotate by a first motor, and a first threaded plate threaded on both sides of the first bidirectional screw rod, and a first push plate sliding through the sealing adjustment box is symmetrically fixed between the first threaded plate and the first support plate.

[0011] A further improvement is that the second ejection mechanism includes a second bidirectional screw rod rotatably connected to the interior of the longitudinal cavity and driven to rotate by a second motor, and a second threaded plate threadedly sleeved on both sides of the second bidirectional screw rod, and the second threaded plate slides through one end close to the second support plate to the outside of the sealing adjustment box and is fixedly connected to the second support plate.

[0012] A further improvement is that: the first bidirectional screw and the second bidirectional screw are fixedly sleeved with a driven bevel gear, and the output ends of the first motor and the second motor respectively pass through the vertical cavity and the longitudinal cavity through bearings and are fixed with a driving bevel gear that meshes with the driven bevel gear.

[0013] A further improvement is that the elastic snap-in mechanism includes a support frame fixed to opposite sides of the two groups of mounting seats and a spring pin that slides through the support frame. The spring pin slides through the interior of the mounting seat at one end close to the mounting seat, and a socket adapted to the spring pin is provided on one side of the L-shaped support plate located inside the mounting seat.

[0014] A further improvement is that a pull ring is fixed to one end of the spring latch located outside the support frame, a blocking piece is fixedly sleeved on one side of the spring latch located inside the support frame, and a limit spring sleeved on the outside of the spring latch is connected between the inner wall of the support frame away from the mounting seat and the blocking piece.

[0015] A method for sealing a rear sealing structure of a hydraulic support by filling it with a paste, comprising the following steps:

[0016] Step 1: First, use the elastic clamping mechanism to clamp and fix the mounting base and the L-shaped support plate to achieve quick installation of the sealing adjustment box on the rear of the hydraulic support body;

[0017] Step 2: Then, the front and rear L-shaped sealing plates are slid and adjusted to the front and rear sides respectively and unfolded, and then the first ejection mechanism is used to drive the two sets of first support plates to respectively drive the upper and lower L-shaped sealing plates to push upward and downward respectively until the sealing barrier cloth is stretched out and the upper and lower edges of the sealing barrier cloth are pressed against the top and bottom ends of the mining tunnel respectively;

[0018] Step 3: Then slide the upper and lower sealing side panels upward and downward respectively and unfold them, and then use the second ejection mechanism to drive the front and rear sealing side panels to be ejected forward and backward respectively, until the front and rear edges of the sealing barrier cloth are pressed against the front and rear inner walls of the mining tunnel respectively, forming a relatively sealed filling space, realizing the sealing of the filling space, and finally using the injection pipe to inject the paste into the filling space.

[0019] The beneficial effects of the present invention are as follows: the present invention symmetrically fixes the L-shaped support plate at the rear of the hydraulic support body, and clamps the L-shaped support plate to the mounting seat on the left side wall of the sealing adjustment box through an elastic clamping mechanism, thereby realizing the detachable and convenient installation of the hydraulic support body and its rear sealing structure, thereby making the rear sealing structure easy to disassemble and assemble for regular maintenance and inspection, and easy to use. The L-shaped sealing plate is slidably connected on both sides of the first slide, and the L-shaped sealing plate is driven by the first ejection mechanism to press the upper and lower edges of the sealing barrier cloth against the top and bottom ends of the mining tunnel respectively, thereby realizing relative sealing of the upper and lower parts of the mining tunnel. At the same time, the sealing side plates are slidably connected on both sides of the second slide, and the sealing side plates are driven by the second ejection mechanism to press the front and rear edges of the sealing barrier cloth against the front and rear inner walls of the mining tunnel respectively, thereby realizing relative sealing of the front and rear sides of the mining tunnel, forming a full-dimensional seal of the filling space to a certain extent, which can effectively prevent the filling paste from leaking, so as to ensure the paste filling quality in the mining tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the rear sealing structure of the paste-filled hydraulic support of the present invention in a mining tunnel;

[0021] Figure 2 is a front cross-sectional view of the sealing adjustment box and the sealing barrier cloth of the present invention;

[0022] Figure 3 The present invention Figure 2 A magnified view of point A in the figure;

[0023] Figure 4 is a top sectional view of the sealing adjustment box of the present invention;

[0024] Figure 5 1 is a side sectional view of the sealing barrier cloth of the present invention.

[0025] Among them: 1. Hydraulic support body; 2. L-shaped support plate; 3. Mounting seat; 4. Sealing adjustment box; 5. First support plate; 6. Second support plate; 7. First slide plate; 8. Second slide plate; 9. L-shaped sealing plate; 10. Sealing barrier cloth; 11. Sealing side plate; 12. Injection pipe; 13. First elastic sealing pad; 14. Second elastic sealing pad; 15. First sliding sleeve; 16. First positioning bolt; 17. First positioning hole; 18. Second Sliding sleeve; 19. Second positioning bolt; 20. Second positioning hole; 21. Vertical cavity; 22. First motor; 23. First bidirectional screw rod; 24. First threaded plate; 25. Push plate; 26. Longitudinal cavity; 27. Second motor; 28. Second bidirectional screw rod; 29. Second threaded plate; 30. Driven bevel gear; 31. Active bevel gear; 32. Support frame; 33. Spring latch; 34. Socket; 35. Blocking piece; 36. Limit spring. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] With the continuous development of my country's coal mining technology, the green coal mining technology of "high efficiency and safety, high recovery rate and environmental coordination" has attracted much attention. According to the analysis of the distribution of mines in my country, the "three-down" coal pressure is relatively common in coal mines. According to the statistical results of key state-owned coal mines, the national coal pressure volume is about 13.79 billion tons, of which 8.76 billion tons are under buildings, and the coal pressure under villages accounts for 60% of the coal pressure under buildings. Backfill mining technology is an effective means to achieve "three-down" coal mining.

[0028] As an effective means of actively protecting mine ecology, backfill mining technology can solve the problem of gangue accumulation in mining areas and reduce surface subsidence. Among them, paste filling is effective in alleviating the problem of "three downs and one up" coal pressure. It not only processes waste, but also replaces high-quality coal resources, and has certain economic and ecological benefits.

[0029] With the rapid development of the coal mining industry, the "three-down" coal pressure problem has become very serious. In order to solve this problem, more and more new filling coal mining supports have been developed and put into use. The sealing problem of the rear filling area of the paste filling support is the main problem affecting the filling efficiency.

[0030] There are currently a variety of baffle structures to solve the sealing problem of the filling area, but most of them use upper and lower baffle structures to seal the filling area, which is not only complex in structure but also cannot achieve good sealing of the filling area.

[0031] Example 1

[0032] according to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown, this embodiment provides a paste-filled hydraulic support rear sealing structure, including a hydraulic support body 1 arranged in a mining tunnel (belonging to the existing technology and will not be described in detail) and L-shaped support plates 2 symmetrically fixed to the upper and lower sides of the rear of the hydraulic support body 1 by bolts. The right ends of the L-shaped support plates 2 on both sides are clamped and fixed with mounting seats 3 by elastic clamping mechanisms, and the right ends of the two groups of mounting seats 3 are jointly fixed with a group of square sealing adjustment boxes 4 by bolts. By symmetrically fixing the L-shaped support plates 2 at the rear of the hydraulic support body 1 and clamping and fixing the L-shaped support plates 2 to the mounting seats 3 on the left side wall of the sealing adjustment box 4 by an elastic clamping mechanism, the hydraulic support body 1 and its rear sealing structure can be detachably and conveniently installed, thereby making the rear sealing structure easy to disassemble and assemble;

[0033] A first support plate 5 is provided on the upper and lower sides of the sealing adjustment box 4, and the two groups of first support plates 5 are driven by the first ejection mechanism inside the sealing adjustment box 4 and displaced in opposite directions. A second support plate 6 is provided on the right side of the sealing adjustment box 4 and is symmetrically distributed front and back, and the two groups of second support plates 6 are driven by the second ejection mechanism inside the sealing adjustment box 4 and displaced in opposite directions. The opposite ends of the two groups of first support plates 5 are fixed with a first slide plate 7 by bolts, and the opposite ends of the two groups of second support plates 6 are fixed with a second slide plate 8 by bolts. The front and rear sides of the first slide plate 7 are slidably connected with an L-shaped sealing plate 9, and the side of the L-shaped sealing plate 9 away from the first slide plate 7 is fixedly bonded with a sealing barrier cloth 10 for sealing the filling area of the mining tunnel. The second slide plate 8 is slidably provided with a sealing side plate 11 on the upper and lower sides, and the sealing side plate 11 is adapted to the position of the L-shaped sealing plate 9. The edge of the partition cloth 10 extends to the left and covers the outer periphery of the L-shaped sealing plate 9 and the sealing side plate 11. The L-shaped sealing plate 9 and the sealing side plate 11 achieve the sealing of the filling area by pressing the edge of the sealing barrier cloth 10 against the inner wall of the mining tunnel. An injection pipe 12 is fixed on the upper L-shaped sealing plate 9 for connecting the external pipeline and pouring the paste into the sealed filling area. The L-shaped sealing plate 9 is slidably connected on both sides of the first slide 7, and the L-shaped sealing plate 9 is driven by the first ejection mechanism to press the upper and lower edges of the sealing barrier cloth 10 against the top and bottom of the mining tunnel respectively, thereby achieving relative sealing of the upper and lower parts of the mining tunnel. At the same time, the sealing side plates 11 are slidably connected on both sides of the second slide 8, and the sealing side plates 11 are driven by the second ejection mechanism to press the front and rear edges of the sealing barrier cloth 10 against the front and rear inner walls of the mining tunnel respectively, thereby achieving relative sealing of the front and rear sides of the mining tunnel.

[0034] The upper surface of the L-shaped sealing plate 9 located above and the lower surface of the L-shaped sealing plate 9 located below are both bonded with a first elastic sealing pad 13, and the front side wall of the sealing side plate 11 located on the front side and the rear side wall of the sealing side plate 11 located on the rear side are both bonded with a second elastic sealing pad 14. The first elastic sealing pad 13 and the second elastic sealing pad 14 are both designed in a wavy shape to adapt to the uneven inner wall of the mining tunnel and further improve the sealing effect.

[0035] The left side wall of the L-shaped sealing plate 9 is fixed with a first sleeve 15 by bolts, and the first sleeve 15 is sleeved on the outside of the first slide 7. A first positioning bolt 16 is threaded through the left side wall of the first sleeve 15. The left side wall of the first slide 7 is provided with first positioning holes 17 distributed at equal intervals, and the first positioning holes 17 are adapted to the first positioning bolts 16. By screwing the first positioning bolts 16 into the first positioning holes 17, the positioning between the first slide 7 and the first sleeve 15 is achieved, which facilitates the sliding adjustment and fixing of the first slide 7 and the first sleeve 15.

[0036] The side wall of the sealing side plate 11 close to the second slide 8 is fixed with a second sleeve 18 by bolts, and the second sleeve 18 is sleeved on the outside of the second slide 8. The second sleeve 18 is threaded with a second positioning bolt 19 on the side away from the sealing side plate 11. The side wall of the second slide 8 away from the sealing side plate 11 is provided with second positioning holes 20 distributed at equal intervals, and the second positioning holes 20 are adapted to the second positioning bolts 19. By screwing the second positioning bolts 19 into the second positioning holes 20, the positioning between the second slide 8 and the second sleeve 18 is achieved, which facilitates the sliding adjustment and fixation of the second slide 8 and the second sleeve 18.

[0037] A vertical cavity 21 is provided on the left side inside the sealing adjustment box 4, and the first ejection mechanism includes a first motor 22, a first bidirectional screw rod 23 and a first threaded plate 24, wherein the first motor 22 is fixed to the left side wall of the sealing adjustment box 4 by bolts, and the first bidirectional screw rod 23 is rotatably connected to the inside of the vertical cavity 21 through a bearing and driven to rotate by the first motor 22, and the first threaded plate 24 is provided with two groups, and the two groups of first threaded plates 24 are respectively threaded on both sides of the first bidirectional screw rod 23 and the threaded connection directions are opposite, and push plates 25 are symmetrically fixed to the side walls on the opposite sides of the two groups of first threaded plates 24, and the end of the push plate 25 away from the first threaded plate 24 slides through to the outside of the sealing adjustment box 4 and is fixedly connected to the first support plate 5, and the first bidirectional screw rod 23 is driven to rotate by the first motor 22, so that the first threaded plates 24 threaded on both sides of the first bidirectional screw rod 23 are displaced toward or in opposite directions, thereby driving the first support plate 5 to move through the push plate 25.

[0038] A longitudinal cavity 26 is provided on the right side inside the sealing adjustment box 4, and the second ejection mechanism includes a second motor 27, a second bidirectional screw rod 28 and a second threaded plate 29, wherein the second motor 27 is fixed to the right side wall of the sealing adjustment box 4 by bolts, and the second bidirectional screw rod 28 is rotatably connected to the inside of the longitudinal cavity 26 through a bearing and driven to rotate by the second motor 27. There are two groups of second threaded plates 29, and the two groups of second threaded plates 29 are respectively threadedly sleeved on both sides of the second bidirectional screw rod 28 and the threaded connection directions are opposite. The right end of the second threaded plate 29 slides through the outside of the sealing adjustment box 4 and is fixedly connected to the second support plate 6 by bolts. The second bidirectional screw rod 28 is driven to rotate by the second motor 27, so that the second threaded plates 29 threadedly sleeved on both sides of the second bidirectional screw rod 28 are displaced toward or in opposite directions, thereby driving the second support plate 6 to displace toward or in opposite directions.

[0039] A driven bevel gear 30 is fixedly sleeved at the middle position of the first bidirectional screw rod 23 and the second bidirectional screw rod 28. The first motor 22 passes through the vertical cavity 21 through a bearing and is fixed with a driving bevel gear 31 that meshes with the driven bevel gear 30. The output end of the second motor 27 passes through the longitudinal cavity 26 through a bearing and is fixed with a driving bevel gear 31 that meshes with the driven bevel gear 30. The first motor 22 and the second motor 27 respectively drive the driving bevel gear 31 at their output ends to rotate, and the driving bevel gear 31 drives the driven bevel gear 30 meshed with it to rotate, thereby driving the first bidirectional screw rod 23 and the second bidirectional screw rod 28 to rotate respectively.

[0040] The elastic snap-fit mechanism includes a support frame 32 and a spring latch 33, wherein the support frame 32 is provided with two groups and is fixed to the side walls of the opposite sides of the two groups of mounting seats 3 by bolts, and the spring latch 33 is provided with two groups and slides through the two groups of support frames 32 respectively. The opposite ends of the two groups of spring latches 33 slide through the inside of the mounting seat 3, and a socket 34 is provided on one side of the L-shaped support plate 2 located inside the mounting seat 3, and the socket 34 is adapted to the spring latch 33. The L-shaped support plate 2 and the mounting seat 3 are snapped and fixed by inserting the spring latch 33 into the socket 34.

[0041] A pull ring is welded and fixed to one end of the spring latch 33 located outside the support frame 32, which is convenient for the user to pull the spring latch 33. A blocking piece 35 is fixedly sleeved on one side of the spring latch 33 located inside the support frame 32. A limiting spring 36 is connected between the inner wall of the support frame 32 on the side away from the mounting seat 3 and the blocking piece 35, and the limiting spring 36 is sleeved on the outside of the spring latch 33. The limiting spring 36 provides an elastic ejection force for the blocking piece 35, so that the spring latch 33 can automatically rebound into the socket 34.

[0042] Example 2

[0043] This embodiment provides a method for sealing a rear sealing structure of a hydraulic support by filling the sealing structure with a paste, comprising the following steps:

[0044] Step 1: The hydraulic support body 1 is located in the mining tunnel to be filled, with its rear facing the area to be filled in the mining tunnel. When the mining tunnel needs to be sealed to fill the paste, the mounting base 3 and the L-shaped support plate 2 are first clamped and fixed using an elastic clamping mechanism to achieve quick installation of the sealing adjustment box 4 at the rear of the hydraulic support body 1 (i.e., the installation of the rear sealing structure is completed). When disassembling, the clamping and fixing of the mounting base 3 and the L-shaped support plate 2 by the elastic clamping mechanism is released;

[0045] Step 2: Then, the L-shaped sealing plates 9 slidably connected on both sides of the first slide plate 7 are slid and adjusted to the opposite side, so that the front and rear groups of L-shaped sealing plates 9 are unfolded until they are adapted to the width of the mining tunnel, and then the first ejection mechanism is used to drive the two groups of first support plates 5 to move in opposite directions, wherein the upper first support plate 5 moves upward, and the lower first support plate 5 moves downward, so as to use the two groups of first slide plates 7 to respectively drive the upper and lower L-shaped sealing plates 9 to be ejected upward and downward, until the upper and lower edges of the sealing barrier cloth 10 are respectively pressed against the top and bottom ends of the mining tunnel, thereby achieving relative sealing of the upper and lower parts of the mining tunnel;

[0046] Step 3: Then slide the sealing side plates 11 slidably connected on both sides of the second slide plate 8 to the opposite side, so that the upper and lower sets of sealing side plates 11 are unfolded until they contact the upper and lower sets of L-shaped sealing plates 9, that is, they are adapted to the height of the mining tunnel. Then, the second ejection mechanism is used to drive the two sets of second support plates 6 to move in opposite directions, wherein the front second support plate 6 moves forward and the rear second support plate 6 moves backward, so as to use the two sets of second slide plates 8 to respectively drive the front and rear sealing side plates 11 to be ejected forward and backward until the front and rear edges of the sealing barrier cloth 10 are respectively pressed against the front and rear inner walls of the mining tunnel, thereby achieving relative sealing of the front and rear sides of the mining tunnel and forming a relatively sealed filling space. Finally, the filling space is injected with paste using the injection pipe 12 until the paste filling work of the entire mining tunnel is completed.

[0047] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A paste-filled hydraulic support rear sealing structure, comprising a hydraulic support body (1), characterized in that: An L-shaped support plate (2) is symmetrically fixed to the rear of the hydraulic support body (1); one end of the L-shaped support plate (2) away from the hydraulic support body (1) is fixed with a mounting seat (3) by means of an elastic clamping mechanism; two sets of mounting seats (3) are fixed with a sealing adjustment box (4) at one end away from the L-shaped support plate (2); the sealing adjustment box (4) is provided with a first support plate (5) driven to move by a first ejection mechanism on both upper and lower sides; and a second support plate (6) driven to move by a second ejection mechanism is symmetrically provided on one side of the sealing adjustment box (4) away from the hydraulic support body (1). The first support plate (5) is fixed with a first slide plate (7) at one end away from the hydraulic support body (1), and the two groups of second support plates (6) are fixed with a second slide plate (8) at the opposite end. The front and rear sides of the first slide plate (7) are both slidably connected with L-shaped sealing plates (9), and the side of the L-shaped sealing plate (9) away from the first slide plate (7) is fixedly bonded with a sealing barrier cloth (10). The upper and lower sides of the second slide plate (8) are both slidably provided with sealing side plates (11) that are adapted to the position of the L-shaped sealing plate (9), and a material injection pipe (12) is fixed on the upper L-shaped sealing plate (9).

2. The paste-filled hydraulic support rear sealing structure according to claim 1, characterized in that: The two groups of L-shaped sealing plates (9) distributed symmetrically in front and back are commonly fixed with a first elastic sealing rubber pad (13) on the outer wall of a side away from the first slide plate (7), and the two groups of sealing side plates (11) distributed symmetrically in top and bottom are commonly fixed with a second elastic sealing rubber pad (14) on the outer wall of a side away from the second slide plate (8).

3. The paste-filled hydraulic support rear sealing structure according to claim 1, characterized in that: A first sliding sleeve (15) is fixed on the side of the L-shaped sealing plate (9) close to the first slide plate (7) and is sleeved on the outside of the first slide plate (7); a first positioning bolt (16) is threadedly passed through the side of the first sliding sleeve (15) away from the L-shaped sealing plate (9); and first positioning holes (17) adapted to the first positioning bolt (16) are equidistantly provided on the first slide plate (7).

4. The paste-filled hydraulic support rear sealing structure according to claim 1, characterized in that: A second sliding sleeve (18) is fixed on the side of the sealing side plate (11) close to the second slide plate (8) and is sleeved on the outside of the second slide plate (8); a second positioning bolt (19) is threadedly passed through the side of the second sliding sleeve (18) away from the sealing side plate (11); and second positioning holes (20) adapted to the second positioning bolt (19) are equidistantly provided on the second slide plate (8).

5. The paste-filled hydraulic support rear sealing structure according to claim 1, characterized in that: The sealing adjustment box (4) is provided with a vertical cavity (21) and a longitudinal cavity (26). The first ejection mechanism comprises a first bidirectional screw (23) rotatably connected to the vertical cavity (21) and driven to rotate by a first motor (22), and a first threaded plate (24) threaded on both sides of the first bidirectional screw (23). A first push plate (25) that slides through the sealing adjustment box (4) is symmetrically fixed between the first threaded plate (24) and the first support plate (5).

6. The paste-filled hydraulic support rear sealing structure according to claim 5, characterized in that: The second ejection mechanism comprises a second bidirectional screw (28) rotatably connected to the interior of the longitudinal cavity (26) and driven to rotate by a second motor (27), and a second threaded plate (29) threadedly sleeved on both sides of the second bidirectional screw (28); the second threaded plate (29) slides through one end close to the second support plate (6) to the outside of the sealing adjustment box (4) and is fixedly connected to the second support plate (6).

7. The paste-filled hydraulic support rear sealing structure according to claim 6, characterized in that: A driven bevel gear (30) is fixedly sleeved on the first bidirectional screw rod (23) and the second bidirectional screw rod (28); the output ends of the first motor (22) and the second motor (27) respectively penetrate into the vertical cavity (21) and the longitudinal cavity (26) through bearings and are fixed with a driving bevel gear (31) meshing with the driven bevel gear (30).

8. The paste-filled hydraulic support rear sealing structure according to claim 1, characterized in that: The elastic clamping mechanism comprises a support frame (32) fixed to opposite sides of the two groups of mounting seats (3) and a spring latch (33) slidingly passing through the support frame (32); one end of the spring latch (33) close to the mounting seat (3) slides through the interior of the mounting seat (3); and a socket (34) adapted to the spring latch (33) is provided on one side of the L-shaped support plate (2) located inside the mounting seat (3).

9. The paste-filled hydraulic support rear sealing structure according to claim 8, characterized in that: A pull ring is fixed to one end of the spring latch (33) located outside the support frame (32), a blocking piece (35) is fixedly sleeved on one side of the spring latch (33) located inside the support frame (32), and a limit spring (36) sleeved on the outside of the spring latch (33) is connected between the inner wall of the support frame (32) away from the mounting seat (3) and the blocking piece (35).

10. A sealing method for a paste-filled hydraulic support rear sealing structure as claimed in claim 1, characterized in that: The following steps are involved: Step 1: First, use the elastic clamping mechanism to clamp and fix the mounting seat (3) and the L-shaped support plate (2) to achieve quick installation of the sealing adjustment box (4) at the rear of the hydraulic support body (1); Step 2: Then, the L-shaped sealing plates (9) on the front and rear sides are slid and adjusted to the front and rear sides respectively and unfolded, and then the first ejection mechanism is used to drive the two sets of first support plates (5) to respectively drive the L-shaped sealing plates (9) on the upper and lower sides to be ejected upward and downward respectively until the sealing barrier cloth (10) is stretched open, and the upper and lower edges of the sealing barrier cloth (10) are respectively pressed against the top and bottom ends of the mining tunnel; Step 3: The upper and lower sealing side plates (11) are then slid and adjusted upward and downward and unfolded, and then the second ejection mechanism is used to drive the front and rear sealing side plates (11) to be ejected forward and backward respectively, until the front and rear edges of the sealing barrier cloth (10) are pressed against the front and rear inner walls of the mining tunnel, forming a relatively sealed filling space and achieving sealing of the filling space. Finally, the filling space is injected with paste using the injection pipe (12).

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