Supporting assembly for isostatic support

Abstract

The application provides a supporting combination device capable of supporting in equal pressure, which comprises an anchoring assembly, a metal box and an elastic tensioning assembly arranged in the metal box, the metal box is horizontally suspended below a rock stratum roof, the anchoring assembly comprises a plurality of anchor ropes symmetrically distributed on both sides of the metal box, one end of the anchor rope is plug-inly arranged in the metal box, the other end of the anchor rope penetrates through the rock stratum roof and is anchored to the top rock stratum, the elastic tensioning assembly comprises a mounting pipe fixedly arranged in the metal box and an elastic piece arranged in the mounting pipe, the mounting pipe is filled with a high cohesive force liquid covering the elastic piece, and the end of the anchor rope penetrating into the metal box on the same side is connected with the end of the mounting pipe protruding from the elastic piece on the same side. By adopting the scheme, the supporting force of the anchor ropes on both sides is always the same during the deformation of the surrounding rock, which is beneficial to realize the equal pressure supporting and improve the control effect on the surrounding rock, and the high cohesive force liquid increases the rigidity of the elastic piece and reduces the deformation of the elastic piece under the action of the tension.

Description

Technical Field

[0001] This invention relates to the field of anchor cable support technology, and more specifically, to a support assembly capable of equal pressure support. Background Technology

[0002] High breaking strength anchor cable support plays a crucial role in ensuring the safety of roadways (tunnels) and maintaining the stability of the surrounding rock. By anchoring the anchor cable into the surrounding rock, the mechanical state of the surrounding rock is changed, forming an integral and stable rock zone around the roadway. The anchor cable and the surrounding rock work together to maintain the stability of the roadway.

[0003] However, over time, the roof of the tunnel will subside, causing the anchor cables to fail in supporting the fractured surrounding rock. Severe roof subsidence can even lead to anchor cable retraction or breakage, creating safety hazards for the tunnel and workers. This risk is even higher when the anchor cable support is under unequal pressure. Currently, with the increasing breaking strength of anchor cables and the improvement of corresponding resin anchoring technology, enhancing the ductility of anchor cables in the face of roof subsidence has become a weak point in anchor cable support. Addressing this issue often requires additional anchor cables and reinforced supports, significantly increasing support costs without eliminating safety hazards. Summary of the Invention

[0004] This invention provides a support assembly that can provide equal pressure support, thereby improving the ductility of anchor cables and the support effect of the support assembly in the prior art.

[0005] To achieve the above objectives, the present invention provides a support assembly capable of equal pressure support. The support assembly capable of equal pressure support includes an anchoring component, a metal box, and an elastic tensioning component disposed within the metal box. The metal box is horizontally suspended below the top of the rock stratum. The anchoring component includes multiple anchor cables symmetrically distributed on both sides of the metal box. One end of the anchor cable is insertably inserted into the metal box, and the other end of the anchor cable passes through the top of the rock stratum and is anchored to the top rock stratum. The elastic tensioning component includes an installation tube fixedly disposed inside the metal box and an elastic element inserted through the installation tube. The installation tube is filled with a high-cohesion liquid covering the elastic element. The end of the anchor cable on the same side that enters the metal box is connected to the end of the elastic element protruding from the installation tube on the same side.

[0006] Furthermore, the support assembly capable of equal pressure support also includes a jacking component movably installed inside a metal box. The jacking component and the inner wall of the metal box cavity are mutually restrictive. The two ends of the elastic element protrude from the mounting tube and are respectively connected to a jacking component. The ends of multiple anchor cables located on the same side that pass into the metal box are all connected to the jacking component on the same side.

[0007] Furthermore, there are multiple elastic tensioning components, which extend along the length of the metal box and are spaced apart along the width of the metal box. The area between any two adjacent elastic tensioning components forms a penetration area for threading anchor cables, and the same end of the multiple elastic components is connected to the support component on the same side.

[0008] Furthermore, the supporting assembly includes a baffle plate movably disposed inside the metal box and limited to the inner wall of the metal box, and the anchoring assembly includes a lock fixedly sleeved on the anchor cable. One end of the elastic element protruding from the mounting tube is connected to the surface of the baffle plate. The lock is fixedly sleeved on the outer periphery of the portion of the anchor cable that penetrates into the metal box. The lock is movably inserted into the insertion area and limited to the outer walls of the two mounting tubes. The surfaces of the lock and the baffle plate abut against each other.

[0009] Furthermore, the support assembly also includes a support seat, which is disposed between the baffle and the lock. One end of the anchor cable, which enters the metal box, passes through the baffle, the support seat, and the lock in sequence and is fixedly connected to the lock located in the penetration area.

[0010] Furthermore, the anchor cable extends in an "L" shape and includes an interconnected main body and a tail end. The end of the main body passes through the top of the rock stratum and is fixed to the top rock stratum, while the tail end passes into a metal box and connects with an elastic element inside the metal box.

[0011] Furthermore, the anchoring assembly also includes an anchor rod, the two ends of which are connected to the top of the rock stratum and the metal box, respectively, so as to horizontally suspend the metal box, the elastic tensioning assembly located inside the metal box, and the tail end of the cable inserted inside the metal box below the top of the rock stratum.

[0012] Furthermore, one end of the anchor rod has an external thread, and the anchoring assembly also includes a fastening nut. The threaded end of the anchor rod passes through the top of the metal box and is installed inside the metal box. The fastening nut and the anchor rod are threaded together and cooperate with the stop of the top wall of the cavity of the metal box.

[0013] Furthermore, the installation tube has a grouting hole for injecting a highly cohesive liquid into the installation tube.

[0014] Furthermore, pre-drilled holes for inserting anchor cables are symmetrically arranged on the two side walls along the length of the metal box, and the radial dimension of the pre-drilled holes is larger than the radial dimension of the anchor cables.

[0015] The present invention provides a support assembly capable of equal pressure support, comprising an anchoring component, a metal box, and an elastic tensioning component disposed within the metal box. The metal box is horizontally suspended below the top of the rock stratum. The anchoring component comprises multiple anchor cables symmetrically distributed on both sides of the metal box. One end of each anchor cable is insertably inserted into the metal box, and the other end of each anchor cable passes through the top of the rock stratum and is anchored to the top rock stratum. The elastic tensioning component comprises an installation tube fixedly disposed inside the metal box and an elastic element inserted through the installation tube. The installation tube is filled with a high-cohesion liquid covering the elastic element. The ends of the anchor cables on the same side that penetrate into the metal box are connected to the protruding end of the installation tube of the elastic element on the same side.

[0016] This scheme increases the stiffness of the elastic element and reduces its deformation under tension by filling the installation pipe with a high-cohesion liquid. Specifically, during rock deformation and roof subsidence, the metal box and the elastic tensioning assembly inside the metal box descend together with the roof. Since one end of the anchor cable is fixedly inserted into the top rock layer, the end of the anchor cable inserted into the metal box is gradually pulled out of the metal box as the roof and the metal box descend. The elastic element and the high-cohesion liquid filling the installation pipe are simultaneously tensioned, which helps increase the ductility and support effect of the anchor cable, avoids the situation where the elastic element is easily broken and the anchor cable is easily dislodged, and reduces safety hazards to the roadway and operators. On the other hand, the anchor cables on both sides are elastically connected to both ends of the elastic tensioning assembly. During the deformation of the surrounding rock, the support force of the anchor cables on both sides remains the same, which is conducive to achieving isobaric support and improving the control effect on the surrounding rock. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of the support assembly capable of equal pressure support provided in an embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 A schematic diagram of the internal structure of the metal box;

[0020] Figure 3 It shows Figure 1 A schematic diagram of the structure of the metal box;

[0021] Figure 4 It shows Figure 1 A schematic diagram showing the connection between the elastic tensioning component and the support component;

[0022] Figure 5 It shows Figure 1 A schematic diagram of the structure of the elastic tensioning component.

[0023] The above figures include the following reference numerals:

[0024] 11. Anchor cable; 111. Main body of the cable; 112. Tail end of the cable; 12. Anchor bolt; 13. Locking device; 14. Fastening nut;

[0025] 20. Metal box; 21. Pre-drilled holes;

[0026] 30. Elastic tensioning assembly; 31. Mounting pipe; 311. Grouting hole; 32. Elastic element;

[0027] 40. Support assembly; 41. Baffle plate; 42. Support base. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 5 As shown, an embodiment of the present invention provides a support assembly capable of equal pressure support. The support assembly capable of equal pressure support includes an anchoring component, a metal box 20, and an elastic tensioning component 30 disposed within the metal box 20. The metal box 20 is horizontally suspended below the top of the rock stratum. The anchoring component includes a plurality of anchor cables 11 symmetrically distributed on both sides of the metal box 20. One end of the anchor cable 11 is insertably inserted into the metal box 20, and the other end of the anchor cable 11 passes through the top of the rock stratum and is anchored to the top rock stratum. The elastic tensioning component 30 includes an installation tube 31 fixedly disposed inside the metal box 20 and an elastic element 32 inserted within the installation tube 31. The installation tube 31 is filled with a high-cohesion liquid covering the elastic element 32. One end of the anchor cable 11 located on the same side, which enters the metal box 20, is connected to the protruding end of the installation tube 31 of the elastic element 32 on the same side.

[0030] In this embodiment, the filling of the installation pipe 31 with a high-cohesion liquid increases the stiffness of the elastic element 32 and reduces its deformation under tension. Specifically, when the surrounding rock deforms and the roof of the rock stratum sinks, the metal box 20 and the elastic tensioning component 30 installed inside the metal box 20 will descend together with the roof of the rock stratum. Since one end of the anchor cable 11 is fixedly inserted into the top rock stratum, the end of the anchor cable 11 inserted into the metal box 20 will gradually be pulled out of the metal box 20 as the roof of the rock stratum and the metal box 20 descend. The elastic element 32 and the high-cohesion liquid filled inside the installation pipe 31 are simultaneously tensioned, which helps to increase the ductility and support effect of the anchor cable 11, avoids the situation where the elastic element 32 is easily broken and the anchor cable 11 is easily dislodged, and reduces the safety hazards to the roadway and operators. On the other hand, the anchor cables 11 on both sides are elastically connected to both ends of the elastic tensioning component 30. During the deformation of the surrounding rock, the support force of the anchor cables 11 on both sides is always the same, which is conducive to achieving equal pressure support and improving the control effect on the surrounding rock.

[0031] Preferably, the mounting tube in this embodiment is made of a material with high strength and oxidation resistance to avoid corrosion by highly cohesive liquids, and the elastic element 32 is a spring.

[0032] like Figure 2 and Figure 4 As shown, the isobaric support assembly also includes a movably mounted support component 40 within the metal box 20. The support component 40 and the inner wall of the metal box 20 are mutually restrictive. The two ends of the elastic element 32 protrude from the mounting tube 31 and are respectively connected to a support component 40. The ends of multiple anchor cables 11 on the same side that penetrate into the metal box 20 are all connected to the support component 40 on the same side. This arrangement facilitates the synchronous movement of multiple anchor cables 11 on the same side, allowing the elastic tensioning component 30 to simultaneously tension multiple anchor cables 11 on both sides. It also avoids the situation where the end of the anchor cable 11 penetrating into the metal box 20 is difficult to directly connect to one end of the elastic element 32, or where the connection between the two is prone to breakage, thus ensuring the reliability of the connection and tensioning of the anchor cables 11 by the elastic tensioning component 30.

[0033] Specifically, there are multiple elastic tensioning components 30, which extend along the length of the metal box 20 and are spaced apart along the width of the metal box 20. The area between any two adjacent elastic tensioning components 30 forms a penetration area for the anchor cable 11. The same end of the multiple elastic elements 32 is connected to the support component 40 on the same side. This arrangement further improves the connection and tensioning effect of the anchor cable 11 through the multiple elastic tensioning components 30, and further improves the ductility and support effect of the anchor cable 11.

[0034] Furthermore, the supporting assembly 40 includes a baffle 41 movably disposed within the metal box 20 and limited to the inner wall of the metal box 20. The anchoring assembly also includes a lock 13 fixedly sleeved on the anchor cable 11. One end of the elastic element 32 protruding from the mounting tube 31 is connected to the surface of the baffle 41. The lock 13 is fixedly sleeved on the outer periphery of the portion of the anchor cable 11 that penetrates into the metal box 20. The lock 13 is movably inserted into the insertion area and limited to the outer walls of the two mounting tubes 31. The surfaces of the lock 13 and the baffle 41 abut against each other.

[0035] In this embodiment, there are two elastic tensioning components 30 and two anchor cables 11. The two anchor cables 11 are symmetrically arranged on both sides of the metal box 20 along its length. The ends of the two anchor cables 11 that penetrate into the metal box 20 pass through the corresponding side baffles 41 and enter the penetration area from both sides of the penetration area. The movement of the ends of the anchor cables 11 is restricted by the lock 13. The lock 13 is matched with the inner wall of the penetration area, that is, the penetration area can guide and limit the movement of the lock 13. The contact surface between the baffles 41 and the lock 13 and the connection surface between the baffles 41 and the end of the elastic member 32 are on the same plane. The connection position between the lock 13 and the baffles 41 is located between the end of the two elastic members 32 on the same side and the connection position of the baffles 41. When the surrounding rock deforms and the top of the rock stratum sinks, the end of the anchor cable 11 that penetrates into the metal box 20 will gradually be pulled out of the metal box 20 as the top of the rock stratum and the metal box 20 descend. The two anchor cables 11 and the two locking devices 13 fixedly sleeved on the two anchor cables 11 will move away from each other. During the movement, the two locking devices 13 will push the baffles 41 on both sides away from each other and simultaneously tension the two ends of the elastic elements 32. This arrangement helps to reduce the length occupied by the elastic tensioning components 30 and the anchor cables 11 in the metal box 20. At the same time, the baffles 41 and locking devices 13 achieve indirect tensioning of the elastic elements 32 when the anchor cables 11 move, ensuring the connection and tensioning effect of multiple elastic tensioning components 30 on multiple anchor cables 11 on the same side.

[0036] It is understood that the number and arrangement of anchor cables 11, elastic tensioning components 30, etc. in this embodiment can be adjusted according to actual conditions, and the number of elastic tensioning components 30 is preferably 2 to 6. In this embodiment, the metal box 20 has an opening at the bottom to facilitate the installation of other components. The lock 13 is movably locked in the through area between two elastic tensioning components 30, and the baffle 41 is movably locked in the metal box 20.

[0037] like Figure 2 and Figure 4As shown, the support assembly 40 also includes a support seat 42, which is disposed between the baffle 41 and the lock 13. One end of the anchor cable 11, which enters the metal box 20, passes sequentially through the baffle 41, the support seat 42, and the lock 13, and is fixedly connected to the lock 13 located in the penetration area. This arrangement helps to increase the distance between the lock 13 and the baffle 41, facilitating the deep installation of the anchor cable 11 within the metal box 20. At the same time, the support seat 42 also helps to adjust the force area applied by the lock 13 to the baffle 41, so as to avoid the situation where the force of the lock 13 pushing the baffle 41 is too concentrated, which may cause the baffle 41 to be easily damaged.

[0038] like Figure 1 and Figure 2 As shown, the anchor cable 11 extends in an "L" shape. The anchor cable 11 includes a main body 111 and a tail end 112 connected to each other. The end of the main body 111 passes through the top of the rock stratum and is fixed to the top rock layer. The tail end 112 passes into the metal box 20 and connects to the elastic element 32 inside the metal box 20. The anchor cable 11 can be bent according to actual conditions. In this embodiment, the main body 111 extends vertically, and the tail end 112 is bent horizontally. This arrangement facilitates the connection between the anchor cables 11 on both sides and the metal box 20 and ensures the effect of isobaric support.

[0039] Specifically, the anchoring assembly also includes an anchor rod 12, with both ends of the anchor rod 12 connected to the top of the rock stratum and the metal box 20, respectively, to horizontally suspend the metal box 20, the elastic tensioning assembly 30 located inside the metal box 20, and the cable tail end 112 passing through the metal box 20 below the top of the rock stratum. This arrangement facilitates the hoisting and fixing of the metal box 20. In this embodiment, the anchor rod 12 extends vertically and connects to the center of the metal box 20 to ensure the reliability of the horizontal suspension of the metal box 20, while also saving tunnel space, facilitating installation, and providing good stability.

[0040] like Figure 2 As shown, one end of the anchor rod 12 has an external thread. The anchoring assembly also includes a fastening nut 14. The threaded end of the anchor rod 12 passes through the top of the metal box 20 and is inserted inside the metal box 20. The fastening nut 14 is threadedly connected to the anchor rod 12 and engages with the stop on the top wall of the cavity of the metal box 20. This arrangement allows the fastening nut 14 to stop the downward movement of the metal box 20 along the axial direction of the anchor rod 12, facilitating the suspension of the stop on the metal box 20.

[0041] like Figure 5As shown, the installation tube 31 has a grouting hole 311, which is used to inject a high-viscosity liquid into the installation tube 31. This design facilitates the injection of the high-viscosity liquid by the operator. The operator can install the elastic element 32 into the installation tube 31 and then fill the installation tube 31 with the high-viscosity liquid through the grouting hole 311, avoiding the situation where the elastic element 32 is difficult to install after filling.

[0042] Preferably, such as Figures 1 to 3 As shown, pre-drilled holes 21 for threading anchor cables 11 are symmetrically arranged on the two side walls along the length of the metal box 20. The radial dimension of the pre-drilled holes 21 is larger than the radial dimension of the anchor cables 11. This arrangement facilitates the insertion and exit of the anchor cables 11 on one side of the metal box 20. The top of the metal box 20 also has anchor bolt mounting holes for threading anchor bolts 12.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A support assembly capable of equal pressure support, characterized in that, The pressure-equalizing support assembly includes an anchoring component, a metal box (20), and an elastic tensioning component (30) disposed within the metal box (20). The metal box (20) is horizontally suspended below the top of the rock stratum. The anchoring component includes multiple anchor cables (11) symmetrically distributed on both sides of the metal box (20). One end of each anchor cable (11) is insertably inserted into the metal box (20), and the other end of each anchor cable (11) passes through the top of the rock stratum and anchors. Fixed to the top rock layer, the elastic tensioning assembly (30) includes an installation tube (31) fixedly disposed inside the metal box (20) and an elastic element (32) passing through the installation tube (31). The installation tube (31) is filled with a high-cohesion liquid covering the elastic element (32). One end of the anchor cable (11) located on the same side, which passes through the metal box (20), is connected to the end of the elastic element (32) on the same side that protrudes from the installation tube (31).

2. The support assembly capable of equal pressure support according to claim 1, characterized in that, The pressure-equalizing support assembly further includes a support component (40) movably disposed within the metal box (20). The support component (40) and the inner wall of the cavity of the metal box (20) are mutually limiting and matched. The two ends of the elastic element (32) protrude from the mounting tube (31) and are respectively connected to one of the support components (40). One end of the multiple anchor cables (11) located on the same side that enter the metal box (20) is connected to the support component (40) on the same side.

3. The support assembly device capable of equal pressure support according to claim 2, characterized in that, There are multiple elastic tensioning components (30), which extend along the length direction of the metal box (20) and are spaced apart along the width direction of the metal box (20). The area between any two adjacent elastic tensioning components (30) forms a penetration area for the anchor cable (11). The same end of the multiple elastic elements (32) is connected to the support component (40) on the same side.

4. The support assembly capable of equal pressure support according to claim 3, characterized in that, The supporting assembly (40) includes a baffle (41) movably disposed within the metal box (20) and limited to the inner wall of the metal box (20). The anchoring assembly also includes a lock (13) fixedly sleeved on the anchor cable (11). One end of the elastic element (32) protruding from the mounting tube (31) is connected to the surface of the baffle (41). The lock (13) is fixedly sleeved on the outer periphery of the portion of the anchor cable (11) that penetrates into the metal box (20). The lock (13) is movably inserted into the insertion area and limited to the outer walls of the two mounting tubes (31). The surfaces of the lock (13) and the baffle (41) abut against each other.

5. The support assembly capable of equal pressure support according to claim 4, characterized in that, The support assembly (40) also includes a support seat (42), which is disposed between the baffle (41) and the lock (13). One end of the anchor cable (11) that enters the metal box (20) passes through the baffle (41), the support seat (42) and the lock (13) in sequence and is fixedly connected to the lock (13) located in the penetration area.

6. The support assembly capable of equal pressure support according to claim 1, characterized in that, The anchor cable (11) extends in an "L" shape. The anchor cable (11) includes a cable body (111) and a cable tail end (112) that are connected to each other. The end of the cable body (111) passes through the top plate of the rock stratum and is fixed to the top rock stratum. The cable tail end (112) passes into the metal box (20) and is connected to the elastic element (32) inside the metal box (20).

7. The support assembly capable of equal pressure support according to claim 6, characterized in that, The anchoring assembly also includes an anchor rod (12), the two ends of which are connected to the top of the rock stratum and the metal box (20) respectively, so as to horizontally suspend the metal box (20), the elastic tensioning assembly (30) located in the metal box (20), and the cable tail end (112) passing through the metal box (20) below the top of the rock stratum.

8. The support assembly capable of equal pressure support according to claim 7, characterized in that, One end of the anchor rod (12) has an external thread, and the anchoring assembly also includes a fastening nut (14). The threaded end of the anchor rod (12) passes through the top of the metal box (20) and is installed inside the metal box (20). The fastening nut (14) and the anchor rod (12) are threadedly connected and cooperate with the stop of the cavity top wall of the metal box (20).

9. The support assembly capable of equal pressure support according to claim 1, characterized in that, The mounting tube (31) has a grouting hole (311) for injecting a high-cohesion liquid into the mounting tube (31).

10. The support assembly capable of equal pressure support according to claim 1, characterized in that, The metal box (20) has two side walls symmetrically provided with pre-drilled holes (21) for threading the anchor cable (11), and the radial dimension of the pre-drilled holes (21) is larger than the radial dimension of the anchor cable (11).

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