Automatically extendable lateral end-paste filling hydraulic support

Abstract

The utility model provides a kind of can be automated lateral extension end head paste filling hydraulic support, and the support includes hydraulic support main body, lateral extension subassembly and bottom sealing assembly, and hydraulic support main body includes base, and two lifting hydraulic cylinders are fixed in parallel on base, and the piston rod top end of two lifting hydraulic cylinders is rigidly connected with roof beam;Lateral extension subassembly includes fixed side guard plate fixed to the rear end of base and two up-down displacement hydraulic cylinders, and the piston rod top end of two up-down displacement hydraulic cylinders is rigidly connected with up-down displacement side guard plate arranged in parallel with fixed side guard plate, and two horizontal displacement hydraulic cylinders are installed on fixed side guard plate, and the piston rod top end of two horizontal displacement hydraulic cylinders is connected with horizontal displacement side guard plate;Bottom sealing assembly includes vertical displacement hydraulic cylinder and rubber pad installed in the bottom of horizontal displacement side guard plate.The application adopts multi-direction adjustable side guard plate to form continuous sealing surface, and the automatic plugging of end head transverse gap can be realized.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic support equipment for filling, specifically to an automated laterally extendable end-filling hydraulic support, which is particularly suitable for end-filling operations in coal mining faces of different widths and can achieve automatic sealing of roadway ends. Background Technology

[0002] Traditional filling processes in narrow working spaces at the upper end generally employ a combination of hydraulic supports for filling paste at the end and manual construction. Specifically, after the hydraulic supports for filling paste at the end complete the initial sealing, the lateral gaps are then sealed manually using wooden molds and straw mats. However, this technical solution has the following drawbacks: (1) the manual sealing process is time-consuming; (2) the elevated and inclined working face poses a safety hazard. This traditional method has low overall filling efficiency and a high material waste rate, seriously hindering the development of safe and efficient mining technology under complex geological conditions.

[0003] Furthermore, traditional end-filling hydraulic supports have limited functionality. Based on their structural design, they can be divided into fixed end-filling supports and adjustable end-filling supports. A typical example of a fixed end-filling support is the end-filling support for coal mine paste filling (CN222615387U) invented by Shandong Kangge Energy Technology Co., Ltd. Its structural characteristics include fixed side plate positions that cannot be dynamically adjusted. It is simple in structure and low in cost, suitable for conventional working faces with stable geological conditions and small variations in roadway dimensions; however, its adaptability is poor, and it cannot cope with surrounding rock deformation or complex spatial structures. Adjustable end-filling supports are characterized by side plates that can be automatically or manually adjusted via hydraulic or mechanical mechanisms. However, the current design functions of related end-filling supports are relatively limited, allowing only single-degree-of-freedom adjustment and only vertical displacement. For example, the hydraulic support for the end of the roadway in the paste filling working face (CN115506844A) invented by Shandong Kangge Energy Technology Co., Ltd. relies on the vertical displacement of the side plate for protection. It has the disadvantage of small protection area and inability to effectively seal the side of the roadway end. This disadvantage is particularly obvious when the end working face is irregular. Utility Model Content

[0004] To address the technical problems of existing fixed end supports having poor adaptability and being unable to cope with surrounding rock deformation or complex spatial structures, while adjustable end supports rely solely on the vertical displacement of the side plates for protection, resulting in a small protection area and an inability to effectively seal the end in the horizontal displacement direction, this utility model provides an automated laterally extendable end-filling grease hydraulic support.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An automated lateral extension end-filling hydraulic support for paste filling includes a hydraulic support body, a lateral extension component, and a bottom sealing component. The hydraulic support body includes a base, on which two lifting hydraulic cylinders are fixed in parallel. The piston rods of the two lifting hydraulic cylinders are rigidly connected to a top beam. The lateral extension component includes a fixed side guard plate fixed to the rear end of the base, and two vertical displacement hydraulic cylinders fixed in parallel to the rear of the base. The piston rods of the two vertical displacement hydraulic cylinders are rigidly connected to the vertical displacement side guard plates, which are arranged parallel to the fixed side guard plate. Two horizontal displacement hydraulic cylinders are fixedly installed on the fixed side guard plate, and the piston rods of the two horizontal displacement hydraulic cylinders are fixedly connected to the horizontal displacement side guard plates via connecting brackets. The horizontal displacement side guard plates are elastic plates. The bottom sealing component includes a vertical displacement hydraulic cylinder mounted on a connecting bracket at the lower part of the horizontal displacement side guard plate, and a rubber pad fixed to the bottom end of the horizontal displacement side guard plate. The piston rod of the vertical displacement hydraulic cylinder is configured opposite to the rubber pad to apply pressure.

[0007] Furthermore, the base is provided with a mounting seat that is fixed to the bottom of the cylinder body of the lifting hydraulic cylinder, and the bottom surface of the base is provided with an array of anti-slip grooves.

[0008] Furthermore, the horizontal displacement side guard plate is a rubber plate, and the horizontal displacement side guard plate is provided with a pressure threshold. The pressure threshold is configured to trigger the horizontal displacement hydraulic cylinder to lock when the side contact pressure with the end working surface reaches a preset value.

[0009] Compared with the prior art, the hydraulic support for automated lateral extension end filling of paste provided by this utility model has the following advantages:

[0010] 1. By arranging the hydraulic support for filling, the hydraulic support can effectively support the working face at various heights by adjusting the height of the piston rod of the lifting hydraulic cylinder when it is working.

[0011] 2. A vertical displacement hydraulic cylinder is installed on the base. The piston rod of the vertical displacement hydraulic cylinder is rigidly connected to the vertical displacement side guard plate. When the hydraulic support starts working, the vertical position of the vertical displacement side guard plate can be precisely controlled by controlling the extension and retraction of the piston rod of the vertical displacement hydraulic cylinder. This adjustment mechanism allows the vertical displacement side guard plate to dynamically cooperate with the adjacent fixed side guard plate, automatically adapting the sealing gap according to the height of different end working surfaces, effectively improving the sealing performance of the end area. This structure innovatively achieves a height-adaptive sealing effect, ensuring the safety and stability of the working surface.

[0012] 3. A horizontal displacement hydraulic cylinder is installed on the fixed side guard plate. The piston rod of the horizontal displacement hydraulic cylinder is fixedly connected to the horizontal displacement side guard plate through a connecting bracket. When the hydraulic support starts working, by controlling the extension and retraction of the piston rod of the horizontal displacement hydraulic cylinder, the horizontal movement position of the horizontal displacement side guard plate can be precisely controlled, so that it forms a dynamic sealing fit with the vertically adjustable up-and-down displacement side guard plate, which can effectively seal the end in the horizontal displacement direction. This multi-directional adjustment mechanism can be precisely adapted according to the actual size (including height and width) of the end working surface. Through the synergistic effect of the displacement components in each direction, a complete sealing interface is constructed, significantly improving the sealing reliability and equipment adaptability under complex working conditions.

[0013] 4. By installing a vertical displacement hydraulic cylinder on the connecting bracket at the lower part of the horizontal displacement side guard plate, and fixing a rubber pad at the bottom of the horizontal displacement side guard plate, after the horizontal displacement side guard plate and the upper and lower displacement side guard plates are adjusted to perform preliminary sealing of the end working surface, pressure can be applied to the rubber pad through the piston rod of the vertical displacement hydraulic cylinder. Under the action of the piston rod of the vertical displacement hydraulic cylinder, the rubber pad forms an elastic sealing layer, which reduces the leakage rate of the filling material and completes the sealing work of the bottom of the horizontal displacement side guard plate, thereby completing the complete sealing of the end working surface.

[0014] 5. Lifting hydraulic cylinders, vertical displacement hydraulic cylinders, horizontal displacement hydraulic cylinders, and vertical displacement hydraulic cylinders can be integrated and controlled through existing hydraulic systems. The time required for a single adjustment is short, and the efficiency is greatly improved compared to manual operation. Attached Figure Description

[0015] Figure 1 This is a first-view structural diagram of the hydraulic support for automatically extending lateral end paste filling provided by this utility model.

[0016] Figure 2 This is a second-view structural diagram of the hydraulic support for automatically extending the end of the paste filling device provided by this utility model.

[0017] In the diagram, 1. Base; 2. Lifting hydraulic cylinder; 3. Top beam; 4. Fixed side guard plate; 5. Vertical displacement hydraulic cylinder; 6. Vertical displacement side guard plate; 7. Horizontal displacement hydraulic cylinder; 8. Connecting bracket; 9. Horizontal displacement side guard plate; 10. Vertical displacement hydraulic cylinder; 11. Rubber pad. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0019] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please refer to Figure 1 and Figure 2As shown, this utility model provides an automated laterally extendable end-filling hydraulic support for paste filling, including a hydraulic support body, a lateral extension component, and a bottom sealing component. The hydraulic support body includes a base 1, on which two lifting hydraulic cylinders 2 are fixed in parallel. The piston rods of the two lifting hydraulic cylinders 2 are rigidly connected to a top beam 3, thereby dynamically adjusting the height of the top beam 3 to adapt to the end working surface, providing rapid and effective support for the end working surface and improving work efficiency. The lateral extension component includes a fixed side guard fixedly disposed at the rear end of the base 1. The system includes a plate 4 and two vertical displacement hydraulic cylinders 5 fixed parallel to each other at the rear of the base 1. The piston rods of the two vertical displacement hydraulic cylinders 5 are rigidly connected to vertical displacement side guard plates 6. These side guard plates 6 are arranged parallel to the fixed side guard plate 4. The fixed side guard plate 4 can directly and effectively seal the filling fluid during operation. Under the coordinated action of the two vertical displacement hydraulic cylinders 5, the vertical displacement side guard plates 6 can be precisely adjusted in the vertical direction, ultimately achieving a dynamic sealing connection between their working face and the upper surface of the tunnel end. This function can adapt to different height differences. At the tunnel end, it can also provide a reliable sealing effect, providing strong support for improving work efficiency and ensuring project safety, while significantly reducing the need for manual operation; two horizontal displacement hydraulic cylinders 7 are fixedly installed on the fixed side guard plate 4. The piston rod tops of the two horizontal displacement hydraulic cylinders 7 are fixedly connected to the horizontal displacement side guard plate 9 through the connecting bracket 8. The horizontal displacement side guard plate 9 is an elastic plate, so under the synergistic action of the two horizontal displacement hydraulic cylinders 7, the horizontal displacement of the horizontal displacement side guard plate 9 can be adjusted to adapt to the sealing requirements of different widths of the end, effectively reducing labor costs and improving work efficiency; the bottom sealing assembly includes a vertical displacement hydraulic cylinder 10 installed on the connecting bracket 8 at the lower part of the horizontal displacement side guard plate 9, and a rubber pad 11 fixed at the bottom end of the horizontal displacement side guard plate 9. The piston rod of the vertical displacement hydraulic cylinder 10 is arranged opposite to the rubber pad 11 to apply pressure. Thus, the vertical displacement hydraulic cylinder 10 can apply pressure to the rubber pad 11 through its piston rod to enhance the bottom seal, achieve the effect of sealing the bottom end of the horizontal displacement side guard plate 9, thereby enhancing the overall stability and sealing effect of the hydraulic support and improving work efficiency.

[0022] As a specific embodiment, the base 1 is provided with a mounting seat fixed to the bottom of the cylinder of the lifting hydraulic cylinder 2, and the bottom surface of the base 1 is provided with an anti-slip groove array. Thus, during the grouting process, the vertical component of the lateral pressure of the grout can be borne by the lifting hydraulic cylinder 2, while the horizontal component can be dispersed to the bottom surface of the roadway through the anti-slip groove array on the bottom surface of the base 1.

[0023] As a specific embodiment, the horizontal displacement side guard plate 9 is a rubber plate, and the horizontal displacement side guard plate 9 is provided with a pressure threshold. The pressure threshold is configured to trigger the horizontal displacement hydraulic cylinder 7 to lock when the side contact pressure with the end working surface reaches a preset value, thereby better preventing the horizontal displacement side guard plate 9 from overload deformation.

[0024] The working principle of the automated lateral extension end-filling hydraulic support provided by this utility model is as follows: First, the base 1 is fixed. By controlling the piston rod of the lifting hydraulic cylinder 2 to rise and fall, the top beam 3 is raised and lowered to form support on the upper surface of the end working surface. At this time, the filling hydraulic support has effectively supported the upper surface of the end working surface. Then, the piston rod of the vertical displacement hydraulic cylinder 5 is controlled to rise and fall, thereby controlling the vertical displacement side guard plate 6 to rise and fall, completing contact and sealing with the upper surface of the end working surface. Through the cooperation of the vertical displacement side guard plate 6 and the fixed side guard plate 4, the upper and lower surfaces of the end working surface are sealed. Then, the piston rod of the horizontal displacement hydraulic cylinder 7 is controlled to move horizontally, thereby controlling the horizontal displacement side guard plate 9 to contact and seal with the side of the end working surface. Through the cooperation of the horizontal displacement side guard plate 9, the fixed side guard plate 4, and the vertical displacement side guard plate 6, the left and right surfaces of the end working surface can be effectively sealed. Finally, by controlling the piston rod of the vertical displacement hydraulic cylinder 10 to apply pressure perpendicular to the ground to the rubber pad 11, the bottom end of the horizontal displacement side guard plate 9 is fixed and sealed, thereby completing the sealing work of the four surfaces of the entire end working surface.

[0025] This utility model also provides a method for grout blocking in roadways using an automated laterally extending end-filling hydraulic support for paste filling. The method employs the aforementioned automated laterally extending end-filling hydraulic support for paste filling, and includes the following steps:

[0026] S1. Hydraulic support retraction and positioning:

[0027] The vertical displacement hydraulic cylinder 5 and the horizontal displacement hydraulic cylinder 7 are controlled to be in a fully retracted state, so that the lateral extension assembly forms a folded structure.

[0028] S2. Temporary support establishment:

[0029] The piston rod of the lifting hydraulic cylinder 2 is extended until the top beam 3 abuts against the roof of the roadway and reaches the preset support pressure threshold.

[0030] S3, Continuous sealing molding:

[0031] The piston rods of the vertical displacement hydraulic cylinder 5 and the horizontal displacement hydraulic cylinder 7 are extended synchronously, so that the vertical displacement side guard plate 6 extends in the vertical direction and the horizontal displacement side guard plate 9 extends in the horizontal direction, forming a continuous sealing surface with the fixed side guard plate 4.

[0032] The piston rod of the vertical displacement hydraulic cylinder 10 is controlled to press down the rubber pad 11, causing the rubber pad 11 to compress and deform, forming an interference fit with the bottom surface of the tunnel.

[0033] S4, Stress-coordinated load bearing:

[0034] During the grouting process, the lateral pressure of the grout is transmitted to the lifting hydraulic cylinder 2 and the base 1 through the continuous sealing surface. The vertical component is borne by the lifting hydraulic cylinder 2, and the horizontal component is dispersed to the bottom surface of the tunnel through the anti-slip groove array on the bottom surface of the base 1.

[0035] S5, Dynamic recovery of hydraulic support:

[0036] After the slurry has solidified, perform the shrinkage operation in the following order:

[0037] S51, the piston rod of the vertical displacement hydraulic cylinder 10 retracts first to release the interference fit;

[0038] S52. The piston rod of the horizontal displacement hydraulic cylinder 7 retracts in stages, pausing for a period of time after each retraction to eliminate structural stress.

[0039] S53, the piston rods of the vertical displacement hydraulic cylinder 5 and the lifting hydraulic cylinder 2 retract synchronously to the initial state.

[0040] To better understand the automated laterally extendable end-filling hydraulic support and roadway grout-blocking method provided by this utility model, the following will be illustrated through specific implementation examples:

[0041] Implementation Case 1:

[0042] Application scenarios:

[0043] In a coal mine working face with soft rock, the surrounding rock has low strength and is easily deformable, causing the roadway cross-section to continuously converge after excavation. Significant roof subsidence and inward squeezing of the sidewalls are observed at the end area, placing extremely high demands on the active adaptability and sealing reliability of the end supports. Traditional rigid supports often suffer from significant grout leakage under these conditions due to inadequate roof contact and sealing failure.

[0044] Implementation steps:

[0045] Stent placement and initial support:

[0046] The hydraulic support, in its retracted and folded state, is transported to the end work area and positioned. The lifting hydraulic cylinder 2 is activated, causing the top beam 3 to contact the roadway roof. The hydraulic system continuously monitors the support pressure and automatically compensates for the roof's subsidence by raising it, maintaining constant support resistance and effectively controlling further roof deformation.

[0047] Adaptive sealing surface construction:

[0048] Roof sealing: Two vertical displacement hydraulic cylinders 5 are synchronously controlled to extend, driving the vertical displacement side guard plates 6 to move upward and tightly fit against the uneven roadway roof due to deformation, forming a dynamic seal in the vertical direction. This process continues until the contact pressure reaches the system set value.

[0049] Side sealing: Simultaneously, two horizontal displacement hydraulic cylinders 7 are controlled to work in tandem, pushing the horizontal displacement side guard plate 9 to unfold towards the side of the roadway. The horizontal displacement side guard plate 9 is made of rubber, which can trigger hydraulic locking when the contact pressure reaches a preset threshold, ensuring a tight fit with the internal roadway while avoiding equipment damage or further destruction of the surrounding rock due to excessive compression.

[0050] Bottom closed-loop seal: After the horizontal displacement side guard plate 9 is in place, the piston rod of the vertical displacement hydraulic cylinder 10 presses down the rubber pad 11. The rubber pad 11 is compressed and deformed, filling the uneven areas of the bottom plate, thus achieving a closed-loop seal at the bottom and preventing slurry from leaking from the gaps in the bottom plate.

[0051] Filling load and stability control:

[0052] During the paste filling process, the lateral pressure generated by the filling material on the sealing surface is transmitted to the entire support structure. The vertical component is borne by the locked lifting hydraulic cylinder 2; the horizontal component is effectively transmitted to the tunnel floor through the friction generated by the anti-slip groove array at the bottom of the base 1, ensuring the anti-slip stability of the support under soft floor conditions.

[0053] Sequential recycling:

[0054] After the filling paste has fully cured, the stent should be retrieved strictly according to the established sequence:

[0055] First, retract the vertical displacement hydraulic cylinder 10 to release the pressure on the rubber pad 11 and loosen the bottom seal.

[0056] Secondly, the two horizontal displacement hydraulic cylinders 7 are slowly contracted in stages, so that the horizontal displacement side guard plate 9 gradually separates from the roadway and releases the accumulated stress.

[0057] Finally, the vertical displacement hydraulic cylinder 5 and the lifting hydraulic cylinder 2 are retracted simultaneously to restore the support to the transport state.

[0058] Implementation results:

[0059] In this soft rock tunnel application, the hydraulic support successfully achieved effective sealing of the deformed end, with no visible leakage during the filling process. Its adaptive adjustment capability overcame the influence of surrounding rock deformation, forming a stable and reliable closed space, providing key technical equipment for efficient filling under soft rock conditions.

[0060] Implementation Case 2:

[0061] Application scenarios:

[0062] The working face of a certain mine is located in a rectangular roadway with an dip angle of 8 degrees and a cross-section of 2.4m (width) × 3m (height). The roadway has a certain slope, and traditional supports are prone to slippage under inclined conditions, and inadequate lateral sealing can easily lead to slurry leakage. In addition, the roadway has relatively regular dimensions but narrow space, which places high demands on the positioning accuracy, anti-slip performance, and rapid sealing capability of the supports.

[0063] Implementation steps:

[0064] Bracket positioning and anti-slip positioning:

[0065] The hydraulic support is transported to the end area of ​​the inclined roadway in a retracted and folded state. The anti-slip groove array on the bottom surface of the base 1 enhances the friction between it and the inclined base plate. After initial positioning, the angle of the top beam 3 is finely adjusted by the lifting hydraulic cylinder 2 to make it initially fit with the inclined base plate, preventing the support from sliding under slope conditions.

[0066] Rapid support and sealing surface construction:

[0067] Roof support and vertical sealing: Control the extension of the lifting hydraulic cylinder 2 so that the top beam 3 is in close contact with the inclined roof and reaches the preset support pressure to establish stable support. Then control the action of the vertical displacement hydraulic cylinder 5 to drive the vertical displacement side guard plate 6 to extend along the slope of the roadway, closely fit the roof, and form a continuous seal on the roof side.

[0068] Lateral sealing: Two horizontal displacement hydraulic cylinders 7 are synchronously controlled to extend in coordination, pushing the horizontal displacement side guard plate 9 to unfold towards the side wall of the roadway. Since the roadway width is 2.4m, the horizontal displacement side guard plate 9 can accurately adapt to the roadway width under hydraulic drive, and automatically lock when the contact pressure reaches the set threshold, achieving effective sealing of the side wall.

[0069] Bottom sealing enhancement: After the horizontal displacement side guard plate 9 is in place, the piston rod of the vertical displacement hydraulic cylinder 10 applies downward pressure to the rubber pad 11, so that it forms a compression seal on the inclined bottom plate to prevent the slurry from seeping down the slope of the bottom plate.

[0070] Filling load and anti-slip control:

[0071] During the filling process, the lateral pressure generated by the paste slurry on the sealing surface is transmitted to the base 1 through the support structure. The vertical component of the force is borne by the lifting hydraulic cylinder 2, while the horizontal component is effectively resisted by the friction between the anti-slip groove array at the bottom of the base 1 and the inclined base plate, ensuring the overall stability of the support under an 8-degree inclination angle.

[0072] Organized recycling and relocation:

[0073] After the filling paste has cured, perform the recycling operation in sequence:

[0074] First, retract the vertical displacement hydraulic cylinder 10 to release the bottom seal;

[0075] The two horizontal displacement hydraulic cylinders 7 are contracted in stages, so that the horizontal displacement side guard plate 9 gradually detaches from the roadway side.

[0076] The hydraulic cylinders 5 for vertical displacement and 2 for lifting are retracted simultaneously to restore the support to its folded transport state, making it easy to move to the next work point.

[0077] Implementation results:

[0078] In a rectangular roadway with an 8-degree dip and a cross-section of 2.4m × 3m, this hydraulic support demonstrated excellent adaptability, anti-slip performance, and sealing effect. Its multi-directional adjustable structure achieved complete sealing of the inclined roadway end, with no leakage during the filling process and smooth support recovery, effectively supporting efficient and safe mining operations.

[0079] Compared with the prior art, the hydraulic support for automated lateral extension end filling of paste provided by this utility model has the following advantages:

[0080] 1. By arranging the hydraulic support for filling, the hydraulic support can effectively support the working face at various heights by adjusting the height of the piston rod of the lifting hydraulic cylinder when it is working.

[0081] 2. A vertical displacement hydraulic cylinder is installed on the base. The piston rod of the vertical displacement hydraulic cylinder is rigidly connected to the vertical displacement side guard plate. When the hydraulic support starts working, the vertical position of the vertical displacement side guard plate can be precisely controlled by controlling the extension and retraction of the piston rod of the vertical displacement hydraulic cylinder. This adjustment mechanism allows the vertical displacement side guard plate to dynamically cooperate with the adjacent fixed side guard plate, automatically adapting the sealing gap according to the height of different end working surfaces, effectively improving the sealing performance of the end area. This structure innovatively achieves a height-adaptive sealing effect, ensuring the safety and stability of the working surface.

[0082] 3. A horizontal displacement hydraulic cylinder is installed on the fixed side guard plate. The piston rod of the horizontal displacement hydraulic cylinder is fixedly connected to the horizontal displacement side guard plate through a connecting bracket. When the hydraulic support starts working, by controlling the extension and retraction of the piston rod of the horizontal displacement hydraulic cylinder, the horizontal movement position of the horizontal displacement side guard plate can be precisely controlled, so that it forms a dynamic sealing fit with the vertically adjustable up-and-down displacement side guard plate, which can effectively seal the end in the horizontal displacement direction. This multi-directional adjustment mechanism can be precisely adapted according to the actual size (including height and width) of the end working surface. Through the synergistic effect of the displacement components in each direction, a complete sealing interface is constructed, significantly improving the sealing reliability and equipment adaptability under complex working conditions.

[0083] 4. By installing a vertical displacement hydraulic cylinder on the connecting bracket at the lower part of the horizontal displacement side guard plate, and fixing a rubber pad at the bottom of the horizontal displacement side guard plate, after the horizontal displacement side guard plate and the upper and lower displacement side guard plates have been adjusted to perform preliminary sealing of the end working surface, pressure can be applied to the rubber pad through the piston rod of the vertical displacement hydraulic cylinder. Under the action of the piston rod of the vertical displacement hydraulic cylinder, the rubber pad forms an elastic sealing layer, which reduces the leakage rate of the filling material and completes the sealing work of the bottom of the horizontal displacement side guard plate, thereby completing the complete sealing of the end working surface.

[0084] 5. Lifting hydraulic cylinders, vertical displacement hydraulic cylinders, horizontal displacement hydraulic cylinders, and vertical displacement hydraulic cylinders can be integrated and controlled through existing hydraulic systems. The time required for a single adjustment is short, and the efficiency is greatly improved compared to manual operation.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. Hydraulic support with automated lateral propagation of the end-paste filling, characterized in that, The system includes a hydraulic support body, a lateral extension assembly, and a bottom sealing assembly. The hydraulic support body includes a base with two lifting hydraulic cylinders fixed side-by-side on it. The piston rods of the two lifting hydraulic cylinders are rigidly connected to a top beam. The lateral extension assembly includes a fixed side guard plate fixed to the rear end of the base, and two vertical displacement hydraulic cylinders fixed side-by-side to the rear of the base. The piston rods of the two vertical displacement hydraulic cylinders are rigidly connected to the vertical displacement side guard plates, which are arranged parallel to the fixed side guard plate. Two horizontal displacement hydraulic cylinders are fixedly mounted on the fixed side guard plate, and the piston rods of the two horizontal displacement hydraulic cylinders are fixedly connected to the horizontal displacement side guard plates via connecting brackets. The horizontal displacement side guard plates are elastic plates. The bottom sealing assembly includes a vertical displacement hydraulic cylinder mounted on a connecting bracket at the lower part of the horizontal displacement side guard plate, and a rubber pad fixed to the bottom end of the horizontal displacement side guard plate. The piston rod of the vertical displacement hydraulic cylinder moves towards the rubber pad, applying pressure to the rubber pad.

2. The automatically laterally expandable end-plug paste-filled hydraulic support according to claim 1, characterized in that, The base is provided with a mounting seat that is fixed to the bottom of the cylinder of the lifting hydraulic cylinder, and the bottom surface of the base is provided with an array of anti-slip grooves.

3. The self-automatable, laterally extendable end-plug paste-filled hydraulic support according to claim 1, wherein, The horizontal displacement side guard plate is a rubber plate, and the horizontal displacement side guard plate is provided with a pressure threshold. The pressure threshold is configured to trigger the horizontal displacement hydraulic cylinder to lock when the side contact pressure with the end working surface reaches a preset value.

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