Mechanical supporting device for mining
By designing a flexible strut, a detachable strut, an adjustable support structure and a mechanical support device for reusable anchors, the difficulty in adjusting the strut and lack of support structure in the prior art are solved in the prior art. The problem of anchors not being reusable has achieved higher bearing capacity and stability, as well as better flexibility and economy.
Patent Information
- Application Number
- CN202411849326.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-02-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The brackets of existing mining support devices are inconvenient to adjust, the pin lacks support structure, which reduces load-bearing performance, and the anchors cannot be reused.
A mechanical support device including a bendable flexible top rod, a detachable bracket, an adjustable support structure and a reusable anchor are designed. The top rod can be bent into an arched structure according to the cross-section of the mine, the bracket forms a height-adjustable structure through a detachable support unit, and the anchors achieve stable positioning and reuse through the drive assembly.
The bearing capacity and stability of the support device are improved, more stable support for the top of the mine is achieved, and the flexibility and economy of the equipment are improved through an adjustable and reusable design.
Smart Images
Figure CN119435058A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of mine support, and in particular to a mechanical support device used in mine mining. Background Art
[0002] In order to prevent the surrounding rock from deformation and damage during mining, the tunnel needs to be supported by supporting devices after tunnel excavation.
[0003] Existing supports mostly use a support frame composed of disposable top rods and supports, which are fixedly connected to the circumference of the tunnel, and then adjacent support frames are connected by a protective net to prevent falling objects from the top of the tunnel from causing personal injury. Since the tunnel may have a drop during the excavation process, and the existing supports are mostly formed at one time, it is inconvenient to adjust according to the actual excavation depth, and the top rod supports the top of the tunnel through its own structure, has no supporting structure, and reduces the load-bearing performance. In addition, the anchor cannot be reused. Summary of the invention
[0004] 1. Technical Problems Solved
[0005] The technical problem to be solved by the present invention is that the support frame is inconvenient to adjust according to the actual excavation depth, the top rod has no supporting structure, and the load-bearing performance is reduced; and the anchor cannot be reused.
[0006] 2. Technical Solution
[0007] In order to solve the above technical problems, the technical solution provided by the present invention is: a mechanical support device for mining, including a top rod, the top rod is a flexible structure that can be bent into an arch shape, and both ends of the top rod are detachably connected with a support frame, the support frame includes a plurality of support units, and the adjacent support units are detachably connected at the head and tail, and the support units are rotatably connected with connecting ears, and the connecting ears are provided with two groups. The bottom end of the support unit is detachably connected with a mounting seat, and the two sides of the top rod are respectively connected with anchors that can penetrate into the base, and the inner side of the top rod is connected with an adjustable support structure.
[0008] Furthermore, the support unit includes a connecting rod, a connecting groove is provided at the bottom end of the connecting rod, a plurality of limiting grooves are circumferentially connected to the connecting groove, an extension rod is connected to the top end of the connecting rod and cooperates with the connecting groove, a cavity is connected between the extension rod and the connecting rod, a plurality of accommodating grooves are circumferentially connected to the top end of the cavity, limiting beads are provided in the accommodating grooves, the limiting beads cooperate with the limiting grooves, a movable plate is slidably connected in the cavity, a spring is connected between the movable plate and the bottom wall of the cavity, a driving rod is connected to the other side of the movable plate, and the driving rod can drive the limiting beads to extend the extension rod outward, first driving the movable plate to slide down the cavity At this time, the spring is compressed and stored, and the movable plate drives the driving rod to slide down, so that the driving rod cannot limit the limiting bead; the connecting groove on the adjacent connecting rod is aligned with the extension rod to make it match, and the connecting rod drives the limiting bead to retract into the accommodating groove, and the length of the accommodating groove is not less than the diameter of the limiting bead. Until the connecting groove and the extension rod are matched, the movable plate is released, and the movable plate drives the driving rod upward under the resetting action of the spring. Since the distance between the outer wall of the guide block and the outer wall of the driving rod is less than the radius of the limiting bead, the driving rod drives the limiting bead to move along the accommodating groove toward the limiting groove until the circumferential outer wall of the driving rod abuts against the limiting bead, and the limiting bead extends out of the accommodating groove and cooperates with the limiting groove for limiting.
[0009] Furthermore, a guide block is connected to the middle part of the top wall of the cavity, and the guide block is arranged at the junction of the limit grooves. The driving rod is relatively connected with a guide groove, and the guide groove and the guide block are slidably matched. The setting of the guide block is convenient for guiding the driving rod, and the guide block can space the accommodating grooves to avoid chaotic stacking of the limit beads and affect the subsequent driving rod to drive and limit them.
[0010] Furthermore, through holes are respectively connected on both sides of the cavity, and a protruding rod is relatively connected on the movable plate. The protruding rod slides through the through hole and extends out of the connecting rod. By pressing the protruding rod, the protruding rod drives the movable plate to slide downward along the through hole, thereby realizing the disassembly of the support unit.
[0011] Furthermore, the area of the mounting seat is larger than the cross-sectional area of the support unit, and a counterweight block is connected inside the mounting seat to increase the contact area of the device, to evenly distribute the pressure, and to improve the stability of the support frame.
[0012] The cam is connected to the support frame by the groove of the groove, and the groove is connected to the groove of the groove to prevent the groove from sliding into the groove and sliding into the groove to move the groove in the axial direction of the anchor rod.
[0013] Furthermore, the driving assembly includes a threaded rod rotatably connected to the middle part of the anchor rod, the threaded rod is connected to the sliding sleeve by thread penetration, the other end of the threaded rod is rotatably penetrated through the limiting plate and is connected to a driving block inside the limiting plate, the limiting plate is provided with a countersunk hole that cooperates with the driving block, and the driving block is provided with a cross groove, and the driving block and the threaded rod are driven to rotate by the tool cooperating with the cross groove, and the threaded rod drives the sliding sleeve to move axially along the anchor rod by cooperating with the thread penetration of the sliding sleeve.
[0014] Furthermore, the through hole is chamfered on one side of the free end of the anchor claw, and the hinge center on the sliding sleeve is located on the side of the fixed column close to the center of the anchor rod. As the sliding sleeve moves, the sliding sleeve drives the anchor claw through the hinge with the anchor claw. Since the hinge center on the sliding sleeve is located on the side of the fixed column close to the center of the anchor rod, and the driving groove on the anchor claw cooperates with the fixed column, the anchor claw expands outward, and the chamfered setting makes it easy to avoid the expansion of the anchor claw and avoid interference with it.
[0015] Furthermore, the supporting structure includes a T-bar, a first slide cylinder is connected to the middle part of the push rod, and second slide cylinders are hinged on both sides of the push rod. The free ends of the T-bar are slidably matched with the first slide cylinder and the second slide cylinder respectively, and the first slide cylinder and the second slide cylinder are respectively connected with positioning components that can position the position of the T-bar. The coordinated arrangement of the T-bar, the first slide cylinder, the second slide cylinder and the positioning component facilitates the adjustment of the length and width of the push rod after bending through the positioning component, facilitates the stable support of the inner side of the push rod, and helps to improve the supporting bearing capacity of the push rod.
[0016] Furthermore, the positioning assembly includes a plurality of flaps connected to the free end of the first slide cylinder or the second slide cylinder, and a gap is provided between adjacent flaps, the gap is a triangular structure, the outer periphery of the flap is connected with an external thread, the flap is connected with a threaded barrel through the external thread, the threaded barrel is threadedly matched with the external thread, the thickness of the flap gradually thickens in the direction away from the threaded barrel, by rotating the threaded barrel, the threaded barrel is threadedly matched with the flap, so that the flap shrinks inward, the gap between the flaps becomes smaller, and the inner wall of the flap and the free end of the T-bar are limited by friction, and an anti-slip layer can also be added to the inner wall of the flap to increase the static friction between the flap and the T-bar.
[0017] 3. Beneficial Effects
[0018] The advantages of the present invention compared with the prior art are:
[0019] The top rod can be bent into an adaptive arch structure according to the cross-section of the mine, so that it has a larger bearing capacity and provides more stable support for the top of the mine; the setting of the anchor facilitates the stable positioning of the top rod and the top of the base, and can be disassembled and reused; the setting of the support structure facilitates the adjustment of the bending curvature of the top rod and realizes the internal support of the top rod; the detachable connection of several support units facilitates the formation of a height-adjustable support frame as needed; and the setting of the connecting ears facilitates the hanging of protective nets between adjacent support frames, which is convenient for blocking falling objects and avoiding injuries to workers; the setting of the mounting seat facilitates the support frame to avoid settlement of the frame due to small contact area at the bottom and excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of a mechanical support device for mining according to the present invention.
[0021] Figure 2 It is a schematic diagram of the side section structure of a mechanical support device for mining according to the present invention.
[0022] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of A.
[0023] Figure 4 It is a schematic diagram of the main cross-sectional structure of a mechanical support device for mining according to the present invention.
[0024] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of B.
[0025] Figure 6 It is a schematic diagram of a half-section structure of a mechanical support device for mining according to the present invention.
[0026] Figure 7yes Figure 6 Schematic diagram of the enlarged structure of C in the figure.
[0027] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional structure of the middle anchor.
[0028] As shown in the figure: 1. push rod, 2. support frame, 3. connecting ear, 4. mounting seat, 5. connecting rod, 6. connecting groove, 7. limiting groove, 8. extension rod, 9. accommodating groove, 10. limiting bead, 11. movable plate, 12. spring, 13. driving rod, 14. guide block, 15. through hole, 16. protruding rod, 17. anchor rod, 18. limiting plate, 19. through hole, 20. anchor claw, 21. sliding sleeve, 22. driving groove, 23. fixing column, 24. threaded rod, 25. T-bar, 26. first slide cylinder, 27. second slide cylinder, 28. flap, 29. gap, 30. threaded cylinder. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0030] Embodiment 1
[0031] Combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A mechanical support device for mining, comprising a mandrel 1, the mandrel 1 being a flexible structure that can be bent into an arch shape, the two ends of the mandrel 1 being detachably connected with a support frame 2, the support frame 2 comprising a plurality of support units, the adjacent support units being detachably connected head to tail, the support unit comprising a connecting rod 5, the bottom end of the connecting rod 5 being provided with a connecting groove 6, the connecting groove 6 being circumferentially connected with a plurality of limit grooves 7, the top end of the connecting rod 5 being connected with an extension rod 8 that matches the connecting groove 6, the extension rod 8 and the connecting rod 5 being connected with a cavity, the top end of the cavity A plurality of accommodating grooves 9 are connected in the circumferential direction, and a limiting bead 10 is arranged in the accommodating groove 9, and the limiting bead 10 cooperates with the limiting groove 7. A movable plate 11 is slidably connected in the cavity, and through holes 15 are respectively connected on both sides of the cavity. A convex rod 16 is relatively connected on the movable plate 11, and the convex rod 16 slides through the through hole 15 and extends out of the connecting rod 5. A spring 12 is connected between the movable plate 11 and the bottom wall of the cavity, and a driving rod 13 is connected on the other side of the movable plate 11, and the driving rod 13 can drive the limiting bead 10 to extend outward to form an extension rod 8;
[0032] The arrangement of the top rod in the above structure makes it easy to bend the top rod into an arch structure based on the large bearing capacity of the arch so as to support the top of the mine. The arrangement of the support frame makes it easy to flexibly disassemble and assemble the support unit according to the height of the mine so as to provide stable support for the top rod.
[0033] Combined with Figure 4 A guide block 14 is connected to the middle of the top wall of the cavity, and the guide block 14 is arranged at the junction of the limiting groove 7. A guide groove is relatively connected to the driving rod 13, and the guide groove is slidably matched with the guide block 14;
[0034] The coordinated arrangement of the guide block and the guide groove in the above structure prevents the limiting beads from mixing and interlacing at the intersection of the accommodating grooves, thereby affecting the subsequent driving of the limiting beads by the driving rod.
[0035] Combined with Figure 1 , the bottom end of the support unit is detachably connected to a mounting seat 4, the area of the mounting seat 4 is larger than the cross-sectional area of the support unit, and a counterweight block is connected inside the mounting seat 4;
[0036] The arrangement of the mounting seat 4 in the above structure facilitates the support frame 2 to be supported, thereby preventing the support frame 2 from sinking due to a small bottom contact area and excessive pressure.
[0037] Combined with Figure 6 and Figure 8 , the two sides of the top rod 1 are respectively connected with anchors that can penetrate into the substrate, the anchors include mounting holes connected to the two sides of the top rod 1, the mounting holes are penetrated with anchor rods 17, one end of the anchor rod 17 is connected with a limit plate 18, the anchor rod 17 is hollow, the anchor rod 17 is uniformly arranged in an array in the circumferential direction, the through hole 19 is provided with an anchor claw 20 that matches the through hole 19, the through hole 19 is chamfered at one side of the free end of the anchor claw 20, one end of the anchor claw 20 is hinged with a sliding sleeve 21, and the sliding sleeve 21 is connected with a A driving assembly drives the sleeve 21 to move axially along the anchor rod 17, and the driving assembly includes a threaded rod 24 rotatably connected to the middle part of the anchor rod 17, and the threaded rod 24 penetrates the sleeve 21 through a thread, and the other end of the threaded rod 24 rotates to penetrate the limit plate 18 and is connected to a driving block in the limit plate 18, a driving groove 22 is connected to the middle part of the anchor claw 20, and a fixing column 23 is connected to the through hole 19, and the fixing column 23 cooperates with the driving groove 22, and the hinge center on the sleeve 21 is located on the side of the fixing column 23 close to the center of the anchor rod 17.
[0038] The coordinated arrangement of the anchor in the above structure facilitates the stable connection between the middle portion of the top rod and the base, which can help improve the coordination between the top rod and the base, while also increasing the pull-out resistance of the anchor, and can be disassembled and reused.
[0039] Embodiment 2
[0040] Based on the first embodiment, combined with the attached Figure 1 The support units are rotatably connected with connecting ears 3, and there are two groups of connecting ears 3.
[0041] The arrangement of the connecting ears 3 in the above structure makes it easy to hang a protective net between adjacent support frames 2, thereby blocking falling objects and avoiding injuries to workers.
[0042] Embodiment 3
[0043] Based on the second embodiment, combined with the attached Figure 6 and Figure 7 An adjustable supporting structure is connected to the inner side of the push rod 1, and the supporting structure includes a T-bar 25. A first slide 26 is connected to the middle part of the push rod 1, and second slides 27 are hinged on both sides of the push rod 1. The free ends of the T-bar 25 are respectively slidably matched with the first slide 26 and the second slide 27. The first slide 26 and the second slide 27 are respectively connected with positioning components that can position the T-bar 25. The positioning component includes a plurality of flaps 28 connected to the free ends of the first slide 26 or the second slide 27, and a gap 29 is provided between adjacent flaps 28. The gap 29 is a triangular structure. The outer periphery of the flap 28 is connected with an external thread, and the flap 28 is connected with a threaded barrel 30 through the external thread. The threaded barrel 30 is threadedly matched with the external thread, and the thickness of the flap 28 gradually thickens in the direction away from the threaded barrel 30.
[0044] The coordinated arrangement of the supporting structure in the above structure facilitates the internal stabilization of the bent arch structure of the top rod, thereby further improving the bearing capacity of the top rod.
[0045] The specific usage is as follows:
[0046] The top rod 1 can be bent into an adaptive arch structure according to the mine cross section, so that it has a larger bearing capacity, which is convenient for providing more stable support for the mine top;
[0047] The setting of the anchor is convenient for stably positioning the top rod 1 and the top of the substrate. The end of the anchor rod 17 extending into the substrate is a conical structure, which is convenient for the anchor rod 17 to be inserted into the substrate until the limit plate 18 abuts against the inner side of the top rod 1, and then the slide sleeve 21 is driven to move axially along the anchor rod 17 by starting the driving component. The limit plate 18 is provided with a countersunk hole that cooperates with the driving block, and the driving block is provided with a cross groove. The tool cooperates with the cross groove to drive the driving block and the threaded rod 24 to rotate. The threaded rod 24 drives the slide sleeve 21 to move axially along the anchor rod 17 by cooperating with the thread penetration of the slide sleeve 21. As the slide sleeve The movement of the anchor claw 21, the sleeve 21 drives the anchor claw 20 by being hinged with the anchor claw 20. Since the hinge center on the sleeve 21 is located on the side of the fixing column 23 close to the center of the anchor rod 17, and the driving groove 22 on the anchor claw 20 cooperates with the fixing column 23, the anchor claw 20 expands outward, thereby limiting the top plate between the base and the limiting plate 18, and the chamfered setting is convenient for avoiding the expansion of the anchor claw 20 to avoid interference therewith; if disassembly is required, the threaded rod 24 is driven in the reverse direction, and the threaded rod 24 drives the sleeve 21 to move in the reverse direction, thereby realizing the resetting of the anchor claw 20.
[0048] The support structure is provided to facilitate adjustment of the curvature of the push rod 1, and the T-shaped rod 25, the first slide cylinder 26, the second slide cylinder 27 and the positioning assembly are provided to facilitate adjustment of the length and width of the push rod 1 after bending through the positioning assembly, so as to facilitate stable support of the inner side of the push rod 1, thereby assisting in improving the support bearing capacity of the push rod 1;
[0049] The detachable connection of several supporting units facilitates the formation of a height-adjustable support frame 2 as required. First, the movable plate 11 is driven to slide down along the cavity. At this time, the spring 12 is compressed and stored, and the movable plate 11 drives the driving rod 13 to slide down, so that the driving rod 13 cannot limit the limiting bead 10; the connecting groove 6 on the adjacent connecting rod 5 is aligned with the extension rod 8 to make it match, and the connecting rod 5 drives the limiting bead 10 to retract into the accommodating groove 9. The length of the accommodating groove 9 is not less than the diameter of the limiting bead 10. The setting of the guide block 14 facilitates the guidance of the driving rod 13, and the guide block 14 can accommodate The grooves 9 are spaced to prevent the limiting beads 10 from being stacked in a disorderly manner and affecting the subsequent driving and limiting of the limiting beads 10 by the driving rod 13, until the connecting groove 6 cooperates with the extension rod 8, the movable plate 11 is released, and the movable plate 11 drives the driving rod 13 upward under the reset action of the spring 12. Since the distance between the outer wall of the guide block 14 and the outer wall of the driving rod 13 is smaller than the radius of the limiting beads 10, the driving rod 13 drives the limiting beads 10 to move along the accommodating groove 9 toward the limiting groove 7, until the circumferential outer wall of the driving rod 13 abuts against the limiting beads 10, and the limiting beads 10 extend out of the accommodating groove 9 and cooperate with the limiting groove 7 for limiting;
[0050] If disassembly is required, the protruding rod 16 can be pressed, and the protruding rod 16 drives the movable plate 11 to slide downward along the through hole 15. The movable plate 11 drives the driving rod 13 downward, so that the limiting bead 10 is no longer circumferentially limited by the driving rod 13, thereby realizing the disassembly of the support unit.
[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
[0053] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.
Claims
1. A mechanical support device for mining, comprising a mandrel (1), characterized in that: The top rod (1) is a flexible structure that can be bent into an arch shape. Both ends of the top rod (1) are detachably connected to a support frame (2). The support frame (2) includes a plurality of support units. The adjacent support units are detachably connected at the head and tail. The support units are rotatably connected to connecting ears (3). The connecting ears (3) have two groups. The bottom end of the support unit is detachably connected to a mounting seat (4). Anchors that can penetrate into a base are respectively connected to both sides of the top rod (1). An adjustable support structure is connected to the inner side of the top rod (1).
2. A mechanical support device for mining according to claim 1, characterized in that: The support unit comprises a connecting rod (5), a connecting groove (6) is provided at the bottom end of the connecting rod (5), a plurality of limiting grooves (7) are circumferentially connected to the connecting groove (6), an extension rod (8) matched with the connecting groove (6) is connected to the top end of the connecting rod (5), a cavity is connected between the extension rod (8) and the connecting rod (5), a plurality of accommodating grooves (9) are circumferentially connected to the top end of the cavity, a limiting bead (10) is provided in the accommodating groove (9), the limiting bead (10) is matched with the limiting groove (7), a movable plate (11) is slidably connected in the cavity, a spring (12) is connected between the movable plate (11) and the bottom wall of the cavity, a driving rod (13) is connected to the other side of the movable plate (11), and the driving rod (13) can drive the limiting bead (10) to extend the extension rod (8) outward.
3. A mechanical support device for mining according to claim 2, characterized in that: A guide block (14) is connected to the middle of the top wall of the cavity. The guide block (14) is arranged at the junction of the limiting grooves (7). A guide groove is relatively connected to the driving rod (13). The guide groove and the guide block (14) are slidably matched.
4. A mechanical support device for mining according to claim 3, characterized in that: Through holes (15) are respectively connected to both sides of the cavity, and a convex rod (16) is relatively connected to the movable plate (11). The convex rod (16) slides through the through hole (15) and extends out of the connecting rod (5).
5. A mechanical support device for mining according to claim 1, characterized in that: The area of the mounting seat (4) is larger than the cross-sectional area of the support unit, and a counterweight block is connected inside the mounting seat (4).
6. A mechanical support device for mining according to claim 1, characterized in that: The anchor member comprises mounting holes connected to both sides of the top rod (1), wherein an anchor rod (17) is provided through the mounting holes, and a limit plate (18) is connected to one end of the anchor rod (17), and the anchor rod (17) is hollow inside. The anchor rod (17) is provided with a plurality of through holes (19) in a circumferentially uniform array, and an anchor claw (20) cooperating with the through hole (19) is provided in the through hole (19), and a sliding sleeve (21) is hingedly provided at one end of the anchor claw (20), and a driving assembly capable of driving the sliding sleeve (21) to move axially along the anchor rod (17) is connected to the sliding sleeve (21), and a driving groove (22) is connected to the middle of the anchor claw (20), and a fixing column (23) is connected to the through hole (19), and the fixing column (23) cooperates with the driving groove (22).
7. A mechanical support device for mining according to claim 6, characterized in that: The driving assembly comprises a threaded rod (24) rotatably connected to the middle part of the anchor rod (17); the threaded rod (24) penetrates the connecting sleeve (21) via a thread; the other end of the threaded rod (24) rotatably penetrates the limit plate (18) and is connected to a driving block inside the limit plate (18).
8. A mechanical support device for mining according to claim 7, characterized in that: The through hole (19) is chamfered at one side of the free end of the anchor claw (20), and the hinge center on the sliding sleeve (21) is located on the side of the fixing column (23) close to the center of the anchor rod (17).
9. A mechanical support device for mining according to claim 1, characterized in that: The support structure comprises a T-shaped rod (25), a first slide cylinder (26) is connected to the middle of the push rod (1), and second slide cylinders (27) are hingedly provided on both sides of the push rod (1), and each free end of the T-shaped rod (25) is slidably matched with the first slide cylinder (26) and the second slide cylinder (27), and the first slide cylinder (26) and the second slide cylinder (27) are respectively connected with positioning components that can position the T-shaped rod (25).
10. A mechanical support device for mining according to claim 9, characterized in that: The positioning assembly includes a plurality of clips (28) connected to the free end of the first slide cylinder (26) or the second slide cylinder (27), and a gap (29) is provided between adjacent clips (28). The gap (29) is a triangular structure. The outer periphery of the clips (28) is connected with an external thread. The clips (28) are connected with a threaded barrel (30) through the external thread. The threaded barrel (30) is threadedly matched with the external thread. The thickness of the clips (28) gradually increases in a direction away from the threaded barrel (30).