Gob blocking device and hydraulic support

Abstract

The application relates to the technical field of hydraulic supports, in particular to a gangue blocking device and a hydraulic support. The gangue blocking device is used for plugging an ear shaft hole, the ear shaft hole comprises a first port and a second port which are communicated; the gangue blocking device comprises: a limiting piece arranged at the second port; a plugging piece which can be inserted into the ear shaft hole in the direction from the first port to the second port; the plugging piece comprises: a connecting seat; a first sealing plate arranged at one end of the connecting seat and capable of being embedded into the ear shaft hole; a baffle arranged at the connecting seat and spaced apart from the first sealing plate; the baffle can pass through the limiting piece in the direction from the first port to the second port at a first angle and can be clamped against the limiting piece at a second angle to prevent the plugging piece from moving in the direction of the first port. The gangue blocking device is simple in structure, convenient to disassemble and assemble and difficult to damage.

Description

Technical Field

[0001] This application relates to the field of hydraulic support technology, and more specifically, to a rock-blocking device and a hydraulic support. Background Technology

[0002] Hydraulic supports are crucial support devices in coal mining equipment. Hydraulic supports typically include a pull-back chute mechanism, so pull-back chute trunnions are provided on both the left and right sides of the hydraulic support for installing this mechanism. During operation, once the pull-back chute mechanism is installed on one side of the hydraulic support, the pull-back chute hole on the other side needs to be plugged to prevent coal, gangue, and other debris from entering the base and causing problems when reversing the installation of the pull-back chute mechanism.

[0003] In related technologies, the rock-blocking device used for pulling back the trunnion hole generally consists of multiple parts such as a plug, a stop pin seat, and a stop pin. The entire rock-blocking device has a complex structure, high cost, and complicated disassembly and assembly; at the same time, the plug is exposed on the outside of the base, and during operation, it is prone to squeezing and scraping against the pull-back jack of the adjacent support when the support is moved, which can easily cause damage. Utility Model Content

[0004] In view of this, in order to solve the problems of complex disassembly and assembly of the rock-blocking device in the related technology, and the easy occurrence of squeezing and scratching, this application aims to provide a rock-blocking device with a simple structure, convenient disassembly and assembly and able to avoid damage, as well as a hydraulic support equipped with the rock-blocking device.

[0005] A first aspect of this application provides a blocking device for sealing a trunnion hole, the trunnion hole including a first port and a second port communicating with each other; the blocking device includes: a limiting member disposed at the second port; a blocking member capable of being inserted into the trunnion hole in a direction from the first port to the second port; the blocking member includes: a connecting seat; a first sealing plate disposed at one end of the connecting seat and capable of being embedded in the trunnion hole; a baffle disposed at the connecting seat and spaced apart from the first sealing plate; the baffle can pass through the limiting member in a direction from the first port to the second port at a first angle, and can abut against the limiting member at a second angle to prevent the blocking member from moving towards the first port.

[0006] In the above technical solution, the entire installation process of the rock-blocking device requires no complicated tools or cumbersome steps, making installation and disassembly more convenient and quick, thus greatly improving work efficiency. Simultaneously, the first sealing plate is embedded in the trunnion hole during sealing, which avoids squeezing and scratching, thereby preventing damage.

[0007] In some technical solutions, the sealing component may optionally include a second sealing plate, which is disposed on the connecting seat and located between the first sealing plate and the baffle, and the second sealing plate can be embedded in the trunnion hole.

[0008] In the above technical solution, on the one hand, the second sealing plate cooperates with the first sealing plate to form a multi-layered sealing structure, which can further enhance the sealing effect; on the other hand, the second sealing plate can provide support for the first sealing plate and the baffle, making the sealing component more stable in the trunnion hole and reducing the shaking or displacement of the sealing component caused by external force.

[0009] In some technical solutions, the second sealing plate can optionally engage with the limiting member to prevent the sealing member from continuing to move toward the second port.

[0010] In this way, no matter what direction the impact or vibration occurs during operation, the sealing component can remain in place and will not move, thus avoiding loosening or falling off.

[0011] In some technical solutions, the limiting member is optionally a limiting block, which has a limiting hole; wherein the baffle can pass through the limiting hole at a first angle and engage with the limiting block at a second angle.

[0012] In the above technical solution, the movement of the baffle is restricted by the cooperation between the limiting hole on the limiting block and the baffle. The structure is simple and easy to assemble and disassemble.

[0013] In some technical solutions, optionally, the limiting block covers a portion of the second port to form a limiting protrusion; the limiting protrusion and the second port together define a limiting hole; the baffle is provided with a notch on its side, and the shape of the notch corresponds to that of the limiting protrusion.

[0014] In practical applications, the entire process of sealing the trunnion hole does not require complicated operations or the use of special tools, and is easy to install and remove.

[0015] In some technical solutions, the limiting member may optionally include at least two limiting blocks, which are disposed on opposite sides of the second port.

[0016] Multiple limit blocks can limit the baffle from different positions, thereby helping to improve the reliability of the limit.

[0017] In some technical solutions, optionally, the first sealing plate is provided with a first assembly hole on the side opposite to the baffle for assembling a rotating tool to drive the sealing component to rotate.

[0018] In this way, during installation, operators can use various rotating tools to drive the sealing component to rotate, thus effectively reducing the difficulty of rotation.

[0019] In some technical solutions, the connecting seat may optionally be provided with a second mounting hole, and the first mounting hole and the second mounting hole are connected to form a channel for assembling the rotary tool.

[0020] In the above technical solution, the long channel can provide a longer support distance for the rotating tool. Compared to a single mounting hole, this long channel can make the rotating tool more stable during rotation.

[0021] In some technical solutions, optionally, the inner diameter of the first mounting hole is smaller than the inner diameter of the second mounting hole.

[0022] In practical applications, the first mounting hole can block most large debris, preventing it from entering the channel. This allows the rotary tool to operate smoothly within the channel.

[0023] A second aspect of this application provides a hydraulic support, including a rock-blocking device as provided in any of the foregoing technical solutions. Thus, the hydraulic support possesses all the beneficial effects of any of the foregoing technical solutions, which will not be elaborated further here.

[0024] Additional aspects and advantages of the technical solutions of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of a rock-blocking device in related technologies; Figure 2 This is the second schematic diagram of the structure of the rock-blocking device in the related technology; Figure 3 This is the third structural schematic diagram of a rock-blocking device in related technologies; Figure 4 This is a schematic diagram of the sealing component of the waste rock blocking device provided in the embodiments of this application; Figure 5 This is one of the structural schematic diagrams of the hydraulic support provided in the embodiments of this application; Figure 6 This is a second schematic diagram of the structure of the hydraulic support provided in the embodiments of this application; Figure 7 This is the third schematic diagram of the hydraulic support provided in the embodiments of this application.

[0026] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1' Plug; 2' Baffle 1; 3' Square slot hole.

[0027] Figures 4 to 7 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100. Grit-blocking device; 110. Limiting component; 112. Limiting block; 113. Limiting protrusion; 114. Limiting hole; 120. Sealing component; 121. Connecting seat; 122. First sealing plate; 123. Second sealing plate; 124. Baffle; 125. Notch; 126. First assembly hole; 127. Second assembly hole; 128. Channel; 200 Hydraulic support; 210 Trunnion hole; 212 First port; 214 Second port; 220 Base; 221 Side plate; 222 Rib plate. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0029] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] Currently, hydraulic supports for top coal caving are generally equipped with a pull-back chute device. Therefore, pull-back chute trunnions are provided on both the left and right sides of the hydraulic support for installing the pull-back chute device. In actual operation, after the pull-back chute device is installed on one side of the hydraulic support, the pull-back chute hole on the other side needs to be plugged to prevent coal, gangue, and other debris from entering the base and to avoid problems with the pull-back chute device not being able to be installed on the other side later.

[0031] To solve the above problems, in related technologies, refer to Figure 1 , Figure 2 and Figure 3 A square slot 3' is made in the base cover plate of the hydraulic support. The baffle 2' restricts the movement of the plug 1' outward from the base, and the outer end of the plug 1' restricts its movement inward from the base. The sealing structure has the following shortcomings: 1. Holes need to be drilled in the front cover of the base, which not only increases manufacturing costs, but also makes the disassembly and assembly of the entire structure complicated.

[0032] 2. The outer end of the plug 1' is exposed on the outside of the base, and it is easy to be squeezed and scraped by the pull-back sliding device of the adjacent bracket when the bracket is moved, which can easily cause damage.

[0033] In view of this, the embodiments of this application provide a simple, easy-to-assemble and disassemble, and damage-avoiding truncated rock blocking device. The truncated rock blocking device includes a limiting member and a sealing member. The limiting member is disposed at one end of the truncated shaft hole. The sealing member can be inserted into the truncated shaft hole along its axial direction; the sealing member includes a connecting seat, a first sealing plate, and a baffle; the first sealing plate is disposed at one end of the connecting seat and can be embedded in the truncated shaft hole to seal it; the baffle is disposed on the connecting seat and spaced apart from the first sealing plate; wherein, the baffle can pass through the limiting member at a first angle and can abut against the limiting member at a second angle. The truncated rock blocking device does not require opening a hole in the front cover plate of the base, thereby reducing the manufacturing cost of the hydraulic support. In practical applications, it is only necessary to fix the limiting member to the end of the hydraulic support's truncated shaft hole located inside the base. When sealing is required, the sealing member only needs to be adjusted to the first angle, at which point the baffle can smoothly pass through the truncated shaft hole. The sealing member is inserted along the axial direction of the truncated shaft hole, so that the first sealing plate is embedded in the truncated shaft hole. Next, rotate the sealing component to adjust the baffle to the second angle, causing the baffle to engage with the limiting component. At this point, the position of the sealing component within the trunnion hole is limited by the limiting component, preventing it from loosening or falling off due to vibration or external force during the operation of the hydraulic support, thus completing the sealing of the trunnion hole. The entire installation process requires no complicated tools or tedious steps, greatly improving work efficiency.

[0034] The rock-blocking device provided in this application embodiment can be used in hydraulic supports or other equipment that requires sealing of connection holes, such as mining cars, tunneling machines, etc.

[0035] The following is combined Figures 4 to 7 The rock-blocking device and hydraulic support machine provided in this application will be described in detail through specific embodiments and application scenarios.

[0036] Reference Figure 4 , Figure 5 and Figure 7 In some embodiments, this application provides a blocking device 100 for blocking the trunnion hole 210. The blocking device 100 includes a limiting member 110 and a blocking member 120.

[0037] The trunnion hole 210 includes a first port 212 and a second port 214. A limiting member 110 is disposed at the second port 214 of the trunnion hole 210. A sealing member 120 can be inserted into the trunnion hole 210 in the direction from the first port 212 to the second port 214. The sealing member 120 includes a connecting seat 121, a first sealing plate 122, and a baffle 124. The first sealing plate 122 is disposed at one end of the connecting seat 121 and can be embedded in the trunnion hole 210. The baffle 124 is disposed on the connecting seat 121 and spaced apart from the first sealing plate 122. The baffle 124 can pass through the limiting member 110 in the direction from the first port 212 to the second port 214 at a first angle and can abut against the limiting member 110 at a second angle to prevent the sealing member 120 from moving towards the first port 212.

[0038] Specifically, the limiting member 110 is disposed at the second port 214 of the trunnion hole 210 to provide positioning for the sealing member 120, so as to ensure that the sealing member 120 can be stably positioned in the required position and to ensure the sealing effect.

[0039] The sealing component 120 consists of a connecting seat 121, a first sealing plate 122, and a baffle 124.

[0040] The connecting seat 121 serves as the connecting base for the various components of the sealing member 120, and is used to connect and fix the first sealing plate 122 and the baffle 124, thereby making these components a whole.

[0041] The first sealing plate 122 can fit against the inner wall of the trunnion hole 210. When the sealing member 120 is inserted into the trunnion hole 210, the first sealing plate 122 enters the trunnion hole 210 and is embedded therein, forming a barrier, thereby preventing coal, gangue and other debris from entering from the first port 212 of the trunnion hole 210.

[0042] The baffle 124 can perform different functions at different angles. At the first angle, the baffle 124 can pass through the limiting member 110; while when rotated to the second angle, the baffle 124 can engage with the limiting member to prevent the sealing member 120 from moving towards the first port 212, thereby fixing the sealing member 120. In this way, the operator can fix and remove the sealing member 120 with a simple rotation action, making the installation and removal of the sealing member 120 more convenient and quick, thus helping to improve work efficiency.

[0043] Reference Figure 4 , Figure 6 and Figure 7In practical applications, the limiting member 110 is simply fixed to one end of the trunnion hole 210. When sealing is required, the sealing member 120 is adjusted to the first angle, at which point the baffle 124 can smoothly pass through the trunnion hole 210. The sealing member 120 is inserted along the axial direction of the trunnion hole 210, so that the first sealing plate 122 is embedded in the trunnion hole 210. Then, the sealing member 120 is rotated, and the baffle 124 is adjusted to the second angle, so that the baffle 124 abuts against the limiting member 110. At this time, the position of the sealing member 120 in the trunnion hole 210 is limited by the limiting member 110, thus completing the sealing of the trunnion hole 210. The entire installation process does not require complicated tools or cumbersome steps, and installation and disassembly are more convenient and quick, thereby greatly improving work efficiency. At the same time, when sealing, the first sealing plate 122 is embedded in the trunnion hole 210, which can avoid squeezing and scratching, thus preventing damage.

[0044] In some embodiments, the sealing member 120 further includes a second sealing plate 123. The second sealing plate 123 is disposed between the first sealing plate 122 and the baffle 124 and can be embedded in the trunnion hole 210.

[0045] The second sealing plate 123 is similar to the first sealing plate 122 and can also be embedded in the trunnion hole 210. On the one hand, it cooperates with the first sealing plate 122 to form a multi-layered sealing structure, which can further enhance the sealing effect. On the other hand, the second sealing plate 123 can provide support for the first sealing plate 122 and the baffle 124, making the sealing component 120 more stable in the trunnion hole 210 and reducing the shaking or displacement of the sealing component 120 caused by external forces.

[0046] In some embodiments, the second sealing plate 123 can engage with the limiting member 110 to prevent the sealing member 120 from continuing to move toward the second port 214.

[0047] During the insertion of the sealing member 120 into the trunnion hole 210, the second sealing plate 123 and the limiting member 110 cooperate to ensure that the sealing member 120 has reached the predetermined insertion depth when they engage. This prevents the sealing member 120 from being inserted too deeply and ensures that it is accurately installed in the intended position. Simultaneously, after installation, the baffle 124 and the second sealing plate 123 are located on both sides of the limiting member 110 and engage with it, thus restricting the movement of the sealing member 120 in two opposite directions and enhancing its fixation in the trunnion hole 210. In this way, regardless of the direction of impact or vibration during operation, the sealing member 120 remains in place and does not move, preventing loosening or detachment.

[0048] In some embodiments, the limiting member 110 is a limiting block 112, and the limiting block 112 is provided with a limiting hole 114. The baffle 124 can pass through the limiting hole 114 at a first angle and engage with the limiting block 112 at a second angle.

[0049] In the above embodiment, the limiting member 110 is designed as a limiting block 112. The limiting block 112 can have a regular geometric shape, such as a cuboid, cube, or cylinder, to facilitate positioning and installation. For example, the limiting block 112 is installed on a fixing structure around the second port 214 of the trunnion hole 210.

[0050] A limiting hole 114 is provided on the limiting block 112. Its size and shape need to be designed according to the baffle 124 so that the baffle 124 can pass smoothly at the first angle. At the same time, after the baffle 124 passes through the limiting hole 114, it can be engaged with the limiting block 112 at the second angle. The movement of the baffle 124 is restricted only by the cooperation between the limiting hole 114 on the limiting block 112 and the baffle 124. The structure is simple and easy to assemble and disassemble.

[0051] It is understandable that the projected dimensions of the baffle 124 are different at the first angle and the second angle, meaning that the baffle 124 has an asymmetrical shape. For example, the baffle 124 is a flat, elongated component (such as a rectangle or ellipse) with a first side and a second side. Its cross-sectional dimensions vary in different directions. At the first angle, when moving along the direction from the first port 212 to the second port 214, the projected dimension of the baffle 124 is small, allowing it to easily pass through the limiting member 110. However, when the baffle 124 rotates to the second angle, its projected dimension increases, exceeding the size of the limiting hole 114, making it impossible to retract, thus achieving engagement with the limiting block 112. Alternatively, the baffle 124 may also be provided with protrusions, grooves, or bevels for cooperating with the limiting member 110.

[0052] In the above embodiment, the limiting block 112 covers a portion of the second port 124, forming a limiting protrusion 113. The limiting protrusion 113 and the second port 124 together define a limiting hole 114. The baffle 124 is provided with a notch 125 on its side, and the notch 125 and the limiting protrusion 113 are provided with corresponding shapes.

[0053] The limiting block 112 forms a limiting protrusion 113 on the covering portion of the second port 124. The limiting protrusion 113 and the second port 124 together define the limiting hole 114. The baffle 124 has a notch 125 on its side, which cooperates with the limiting protrusion 113. In this way, at the first angle, the notch of the baffle 124 is directly opposite the limiting protrusion 113. At this time, the notch 125 provides space for the baffle 124 to pass through the limiting member 110, so that it can pass through the limiting member 110 smoothly. After the baffle 124 passes through the limiting member 110, it rotates to the second angle. At this time, the positional relationship between the notch 125 and the limiting protrusion 113 changes, so that the baffle 124 can no longer pass through the limiting hole 114, thereby achieving the limitation of the baffle 124.

[0054] In practical applications, the operator only needs to adjust the baffle 124 to the first angle, so that the notch 125 is aligned with the limiting protrusion 113, and then insert it into the limiting member 110. After insertion, the operator only needs to rotate the baffle 124 to the second angle to complete the fixation. If disassembly is required, the operator only needs to rotate the baffle 124 back to the first angle, so that the notch 125 is aligned with the limiting protrusion 113 again, and then the sealing member 120 can be easily removed from the trunnion hole 210. The entire process requires no complicated operations or special tools, and disassembly and assembly are convenient.

[0055] In some embodiments, the limiting member 110 includes at least two limiting blocks 112, which are disposed on opposite sides of the second port 214.

[0056] Specifically, each limiting block 112 forms a limiting protrusion 113 by covering a portion of the second port 214, and these limiting protrusions 113 together with the second port 214 define a limiting hole 114. Compared to a single limiting block 112, the arrangement of multiple limiting blocks 112 can limit the baffle 124 from different positions, thereby helping to improve the reliability of the limiting.

[0057] Reference Figure 4 and Figure 7 In some embodiments, in order to facilitate the rotation of the sealing member 120, the first sealing plate 122 is provided with a first mounting hole 126 on the side opposite to the baffle 124. The first mounting hole 126 is used to mount a rotating tool to drive the sealing member 120 to rotate.

[0058] In practical applications, the first mounting hole 126 provides a connection point for rotating tools. This allows operators to drive the sealing component 120 to rotate using various rotating tools during installation, effectively reducing the difficulty of rotation. Examples include drill bits or screwdriver handles.

[0059] In the above embodiment, the connecting seat 121 is provided with a second mounting hole 127, which is connected to the first mounting hole 126 to form a channel 128 for assembling a rotary tool.

[0060] This allows for a longer support distance for the rotating tool. Compared to a single mounting hole, this longer channel makes the rotating tool more stable during rotation.

[0061] In some embodiments, the inner diameter of the first mounting hole 126 is smaller than the inner diameter of the second mounting hole 127.

[0062] In actual operation, there may be some larger debris, such as chips and small stones, in the surrounding area. When these debris attempts to enter the channel 128, the smaller inner diameter of the first mounting hole 126 can block most of the larger debris, preventing it from entering the channel 128. In this way, the rotary tool can operate smoothly in the channel 128.

[0063] In some embodiments, the sealing element 120 is manufactured by welding, casting, or integral molding. In this embodiment, the sealing element 120 is manufactured by integral molding. Integral molding allows the sealing element to be manufactured in a single operation, reducing multiple processes and assembly steps, thereby helping to reduce costs.

[0064] Reference Figures 4 to 7 In some embodiments, this application also provides a hydraulic support 200, including the rock-blocking device 100 provided in any of the above embodiments. Thus, the hydraulic support 200 possesses all the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0065] In the above embodiment, the hydraulic support 200 includes a base 220. The base 220 is provided with a side plate 221 and a stiffening plate 222. The side plate 221 and the stiffening plate 222 are spaced apart. The side plate 221 has a first through hole, and the stiffening plate 222 has a second through hole. The first and second through holes together form a trunnion hole 210. A limiting member 110 is disposed on the side of the stiffening plate 222 opposite to the side plate 221.

[0066] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0067] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A device for preventing waste rock spillage, characterized in that, For sealing the trunnion hole, the trunnion hole includes a first port and a second port that are connected; the slag-blocking device includes: A limiting element is provided at the second port; A sealing member, capable of being inserted into the trunnion hole along a direction from the first port to the second port; the sealing member includes: Connector; The first sealing plate is disposed at one end of the connecting seat and can be embedded in the trunnion hole; A baffle is disposed on the connecting seat and spaced apart from the first sealing plate; the baffle can pass through the limiting member at a first angle along the direction from the first port to the second port, and can engage with the limiting member at a second angle to prevent the sealing member from moving toward the first port.

2. The waste rock blocking device according to claim 1, characterized in that, The sealing component also includes: The second sealing plate is disposed on the connecting seat and located between the first sealing plate and the baffle. The second sealing plate can be embedded in the trunnion hole.

3. The waste rock blocking device according to claim 2, characterized in that, The second sealing plate can engage with the limiting member to prevent the sealing member from moving further toward the second port.

4. The waste rock blocking device according to any one of claims 1 to 3, characterized in that, The limiting component is a limiting block, and the limiting block is provided with a limiting hole; The baffle can pass through the limiting hole at the first angle and engage with the limiting block at the second angle.

5. The waste rock blocking device according to claim 4, characterized in that, The limiting block covers a portion of the second port, forming a limiting protrusion; the limiting protrusion and the second port together define the limiting hole; The baffle is provided with a notch on its side, and the shape of the notch corresponds to that of the limiting protrusion.

6. The waste rock blocking device according to claim 5, characterized in that, The limiting component includes at least two limiting blocks, which are disposed on opposite sides of the second port.

7. The waste rock blocking device according to any one of claims 1 to 3, characterized in that, The first sealing plate has a first mounting hole on the side opposite to the baffle. The first mounting hole is used to mount a rotating tool to drive the sealing component to rotate.

8. The waste rock blocking device according to claim 7, characterized in that, The connecting seat is provided with a second mounting hole, and the first mounting hole and the second mounting hole are connected to form a channel for assembling the rotary tool.

9. The waste rock blocking device according to claim 8, characterized in that, The inner diameter of the first assembly hole is smaller than the inner diameter of the second assembly hole.

10. A hydraulic support, characterized in that, Includes the rock-blocking device as described in any one of claims 1 to 9.

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