Coal seam roadway shed anchor cooperative supporting device

Abstract

The present application relates to the technical fields of coal mine roadway supporting, and discloses a coal seam roadway shed-anchor collaborative supporting device, which comprises an arch foot, a positioning steel, a supporting frame, a rotating plate, a second internal thread hole and an angle locking assembly. No matter at which angle the rotating plate swings in the rotating groove, the reliable locking can be realized by independently adjusting the two threaded rods, and the stepless adjustment of the anchoring rod setting angle is realized. The bidirectional diagonal locking mode is used, so that when the rotating plate is subjected to the tension, shear force and bending moment transmitted by the anchoring rod body, no matter how the load direction changes, at least one threaded rod provides resistance from the opposite direction, effectively preventing the rotating plate from rotating and displacing under stress. When the threaded rod is screwed, the arrangement fully transmits the abutting torque generated by the threaded rod on the rotating plate to the entire rotating plate, and the locking effect is better than the scheme in which the abutting points are concentrated near the rotating center.

Description

Technical Field

[0001] This invention relates to the field of coal mine roadway support technology, specifically a coal seam roadway shed-anchor combined support device. Background Technology

[0002] After excavation of tunnels in weak surrounding rock within coal seam roadways, it is necessary to immediately erect scaffolding for initial support. However, the arch feet of the steel arch frame are the weakest link in the entire structure, and are prone to sinking or converging inward due to high surrounding rock pressure.

[0003] The function of the anchor bolt body is to drive it diagonally downward into the rock layer from near the arch foot after the steel arch frame is erected. The end of the anchor bolt body is fixed on the arch foot, like a "nail" to firmly lock the foot of the steel arch frame to the surrounding rock, thereby effectively controlling the deformation and settlement of the steel arch frame and ensuring the stability of the entire support structure.

[0004] In traditional construction, the connection between the anchor bolt body and the steel arch frame mainly relies on welding or binding inside the tunnel. This method is of uncontrollable quality and poses safety hazards in tunnels with high gas levels where open flames are prohibited. Therefore, a construction method of prefabrication outside the tunnel and assembly inside the tunnel is adopted. Connectors are used to allow the anchor bolt body to be adjusted in two planes to adapt to different installation directions.

[0005] In the prior art, the connector uses two opposing arc-shaped clamps to hold the support end of the anchor bolt body. Relying on the clamping of the arc-shaped clamps, the anchor bolt body is very easy to slide along the plate surface, leading to support failure and low support stability. Summary of the Invention

[0006] The purpose of this invention is to provide a coal seam roadway support device with combined anchor and roof support to solve the problems mentioned in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a coal seam roadway arch-anchor combined support device, comprising an arch foot erected on the inner wall of the coal seam roadway and made of H-beams, and further comprising: Positioning steel is installed at a predetermined position on the arch foot; The support frame is set on the positioning steel and has a rotating groove on it. The rotating groove is a symmetrical fan shape in the shape of a bow. The top of the rotating groove is inclined towards the wall side. The rotating plate, when swinging within the rotating groove, always has its two ends in contact with the inner walls of the two arc-shaped ends of the rotating groove, and the maximum deflection angle is limited by the rotating groove. The main body of the anchor rod is installed through the rotating plate. The second internal threaded hole is located in the middle of the rotating plate, extends through the thickness direction of the rotating plate, and is used to pass through and fix the anchor rod body; An angle locking assembly, mounted on a positioning steel, is used to abut against the rotating plate from two opposite directions, with the abutment points located above and below the rotation center of the rotating plate, respectively; the rotating plate is fixed after it rotates to a preset angle.

[0008] Furthermore, the mounting side of the positioning steel is inserted into the arch foot, and the supporting side extends to the outside of the arch foot. The mounting side is provided with at least two sets of through holes; the arch foot is provided with at least two sets of first internal threaded holes. It also includes a first bolt for passing through a set of first internally threaded holes and a set of said through holes arranged coaxially.

[0009] Furthermore, the support frame includes: A limiting frame is fixed to the side of the positioning steel support, and the rotating groove is located inside the limiting frame; A ring plate is fixed on the side of the limiting frame away from the arch foot. The ring plate is provided with an inner ring surface, and the rotating groove is partially blocked on the side of the ring plate near the inner ring surface. The ring plate and the rotating groove together form a limiting groove; the two ends of the rotating plate are symmetrically provided with notches, which are slidably inserted into the outer surface of the ring plate near the inner ring surface.

[0010] Furthermore, the angle locking assembly includes a fourth threaded rod and a fifth threaded rod; The top of the limiting frame is provided with a fourth internal threaded hole on the side away from the wall; the fifth threaded rod passes through one of the through holes and the fourth internal threaded hole and then abuts against the top left side of the rotating plate; The top of the limiting frame is provided with a sixth internal threaded hole on the side near the wall; the fourth threaded rod passes through one of the through holes and the sixth internal threaded hole and abuts against the bottom right side of the rotating plate.

[0011] Furthermore, the support end of the anchor rod body is provided with a first external thread for threaded connection with the second internal thread hole, and its anchoring end is used to be inserted into the wall at an angle downward.

[0012] Furthermore, the limiting frame has a vertically opening at its center, the installation opening penetrates the ring plate, and the installation opening communicates with the rotating groove. The top of the rotating groove is located between the installation opening and the wall, and the bottom of the rotating groove is located on the side of the installation opening away from the wall.

[0013] Furthermore, it also includes: An anchoring agent baffle, sleeved on the main body of the anchor rod, is located between the rotating plate and the wall and is used to seal the anchoring agent at the grouting hole; The third internal threaded hole is provided on the side of the positioning steel near the wall; The third threaded rod passes through the third internal threaded hole and points towards the wall, and is used to abut against the anchoring agent baffle, so that the anchoring agent baffle is tightly attached to the wall.

[0014] Furthermore, the anchoring agent baffle is provided with a second through hole, through which the main body of the anchor rod passes.

[0015] Furthermore, the anchoring agent baffle is provided with an insertion interface, the width of which is equal to the diameter of the support end; there are two anchoring agent baffles, which are fitted together and their insertion interfaces cover each other, and the third threaded rod abuts against one of the anchoring agent baffles away from the wall.

[0016] Furthermore, the diameter of the anchoring end of the anchor bolt body is smaller than the diameter of the support end.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention allows for reliable locking of the rotating plate regardless of its angle of movement within the rotating groove, achieved by independently adjusting two threaded rods, thus enabling stepless adjustment of the anchor bolt installation angle. The bidirectional diagonal locking method ensures that when the rotating plate is subjected to tension, shear, and bending moments transmitted from the anchor bolt body, at least one threaded rod provides resistance from the opposite direction, effectively preventing rotational displacement of the rotating plate under load. Furthermore, this arrangement ensures that the contact torque generated by the threaded rods on the rotating plate is fully transmitted to the entire rotating plate when tightening the threaded rods, resulting in a locking effect superior to designs where the contact point is concentrated near the rotation center. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the wall after installation in one embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a plan view according to an embodiment of the present invention; Figure 4 This is a schematic diagram showing the position of the inner annular surface in one embodiment of the present invention; Figure 5 This is an isometric view of the completed installation in one embodiment of the present invention; Figure 6 This is a schematic diagram showing the position of the fourth internal threaded hole in one embodiment of the present invention; Figure 7 This is an isometric view of another embodiment of the present invention; Figure 8 This is a schematic diagram of the support frame structure in another embodiment of the present invention; Figure 9 An isometric view of the support frame in another embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the anchoring agent baffle in another embodiment of the present invention.

[0019] In the diagram: 1. Arch foot; 2. Positioning steel; 3. Support frame; 4. Rotating groove; 5. Rotating plate; 6. Anchor bolt body; 7. Second internal threaded hole; 8. Angle locking assembly; 9. First bolt; 10. Limiting frame; 11. Ring plate; 12. Inner ring surface; 13. Notch groove; 14. Fourth threaded rod; 15. Fifth threaded rod; 16. Fourth internal threaded hole; 18. Sixth internal threaded hole; 19. Mounting port; 20. Anchoring agent baffle; 21. Third internal threaded hole; 22. Third threaded rod; 23. Insertion interface; 24. Through hole one; 25. Through hole two; 101. First internal threaded hole. Detailed Implementation

[0020] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] See Figures 1-10 The present invention provides a technical solution: a coal seam roadway arch-anchor combined support device, comprising an arch foot 1 erected on the inner wall of the coal seam roadway and made of H-beams, and further comprising: Positioning steel 2 is installed at a predetermined position on the arch foot 1; The support frame 3 is set on the positioning steel 2, and a rotating groove 4 is provided on it. The rotating groove 4 is a symmetrical fan shape in the shape of a bow. The top of the rotating groove 4 is inclined towards the wall side. The rotating plate 5, when swinging within the rotating groove 4, always has its two ends in contact with the inner walls of the two arc-shaped ends of the rotating groove 4, and the maximum deflection angle is limited by the rotating groove 4. The anchor rod body 6 is installed through the rotating plate 5. The second internal threaded hole 7 is located in the middle of the rotating plate 5, and extends through the thickness direction of the rotating plate 5, for passing through and fixing the anchor rod body 6; Angle locking assembly 8 is installed on positioning steel 2 and is used to abut against rotating plate 5 from two opposite directions, with the abutment points located above and below the rotation center of rotating plate 5, respectively; after rotating plate 5 rotates to a preset angle, rotating plate 5 is fixed.

[0022] After the arch foot is installed, grouting holes are drilled on the wall near the arch foot; alternatively, grouting holes can be drilled first, and then arch foot 1 can be installed, depending on the actual construction needs. Arch foot 1 is made of H-beams.

[0023] In one embodiment, the mounting side of the positioning steel 2 is inserted into the arch foot 1, and the supporting side extends to the outside of the arch foot 1. The mounting side is provided with at least two sets of through holes 24; the arch foot 1 is provided with at least two sets of first internal threaded holes 101. It also includes a first bolt 9 for passing through a set of first internally threaded holes 101 and a set of through holes 24 arranged coaxially.

[0024] When drilling, Figure 1 A grouting hole is fixed on one side of the arch foot 1. A positioning steel 2 is inserted into the arch foot 1 near the grouting hole. The mounting side of the positioning steel is located inside the arch foot, and the other side of the positioning steel is the support side extending to the outside of the arch foot. A first bolt 9 is used to pass through several first internal threaded holes 101 and the through hole 24 that are coaxially arranged on both sides of the arch foot 1. At this time, the through hole 24 is located between the first internal threaded holes 101 on both sides. The first bolt 9 is threadedly connected and fixed to the first internal threaded holes 101. At this time, the rotating plate 5 is always confined in the rotating groove 4.

[0025] During installation, insert the anchor rod body 6 into the second internal threaded hole 7 in the middle of the rotating plate 5, and then fit the anchoring agent baffle 20 and the anchor head from the anchoring end. The anchoring agent baffle 20 is located between the anti-slip nut and the wall. Then install the corresponding anchor head to prevent the anchor head from being unable to pass through the second internal threaded hole 7. Continue to insert the anchor rod body 6 into the wall, while adjusting the angle of the rotating plate 5 in the rotating groove 4 so that the rotating plate 5 is perpendicular to the anchor rod body 6, ensuring that the anchor rod body 6 is smoothly inserted into the wall. Continue until the first external thread aligns with the second internal threaded hole 7. At this point, it is necessary to rotate and insert the anchor rod body 6 until it is fully inserted. The anchor head is a commonly used accessory in the existing technology of anchor bolt body 6.

[0026] In one embodiment, the support frame 3 includes: The limiting frame 10 is fixed to the support side of the positioning steel 2, and the rotating groove 4 is located inside the limiting frame 10; The ring plate 11 is fixed on the side of the limiting frame 10 away from the arch foot 1. The ring plate 11 is provided with an inner ring surface 12. The side of the ring plate 11 near the inner ring surface 12 partially blocks the rotating groove 4. The ring plate 11 and the rotating groove 4 together form a limiting groove; the two ends of the rotating plate 5 are symmetrically provided with notch grooves 13, and the notch grooves 13 are slidably inserted into the outer surface of the ring plate 11 on the side near the inner ring surface 12.

[0027] By setting the ring plate 11 and the rotating groove 4 to form a limiting groove, and setting the notch groove 13 at both ends of the rotating plate 5, the rotating plate 5 is restricted from leaving the rotating groove 4, so as to prevent the rotating plate 5 from falling off during use and improve the stability of use.

[0028] In one embodiment, the angle locking assembly 8 includes a fourth threaded rod 14 and a fifth threaded rod 15; The top of the limiting frame 10 is provided with a fourth internal threaded hole 16 on the side away from the wall; the fifth threaded rod 15 passes through one of the through holes 24 and the fourth internal threaded hole 16 and then abuts against the top left side of the rotating plate 5. The top of the limiting frame 10 is provided with a sixth internal threaded hole 18 near the wall; the fourth threaded rod 14 passes through one of the through holes 24 and the sixth internal threaded hole 18 and then abuts against the bottom right side of the rotating plate 5.

[0029] This is the design. Figures 2-6 After the position of the positioning plate 5 is determined, the fourth threaded rod 14 and the fifth threaded rod 15 are rotated inward using a tool. The fourth threaded rod 14 and the fifth threaded rod 15 abut against each other diagonally from above and below the rotation center of the rotating plate 5, and from the left and right sides, respectively, with a lever arm between the abutment point and the rotation center. This bidirectional diagonal locking method ensures that when the rotating plate 5 is subjected to tension, shear force, and bending moment transmitted from the anchor rod body 6, regardless of the change in load direction, at least one threaded rod provides resistance from the opposite direction, effectively preventing the rotating plate 5 from rotating under load. When tightening the threaded rods, this arrangement ensures that the abutment torque generated by the threaded rods on the rotating plate 5 is fully transmitted to the entire rotating plate 5, and the locking effect is better than the scheme where the abutment point is concentrated near the rotation center. Compared with the existing technology that only relies on arc-shaped clamps to hold the anchor rod, this invention locks the rotating plate 5 through mechanical abutment, preventing the anchor rod from sliding along the plate surface, making the connection more reliable.

[0030] No matter what angle the rotating plate 5 swings within the rotating groove 4, it can be reliably locked by independently adjusting the two threaded rods, thus achieving stepless adjustment of the anchor bolt installation angle.

[0031] In one embodiment, Figure 1 The support end of the anchor body 6 is provided with a first external thread for threaded connection with the second internal thread hole 7, and its anchoring end is used to be inserted into the wall at an angle downward.

[0032] In one embodiment, Figure 8 The limiting frame 10 has a vertically opening 19 at its center. The installation opening 19 passes through the ring plate 11 and is connected to the rotating groove 4. The top of the rotating groove 4 is located between the installation opening 19 and the wall, and the bottom of the rotating groove 4 is located on the side of the installation opening 19 away from the wall.

[0033] This is the design. Figure 3Under the constraint of the rotating groove 4, the rotating plate 5 rotates slightly around the rotating center. When viewed from a perspective perpendicular to the limiting frame 10, the top fan-shaped groove is located to the upper right of the rotating center, and the bottom fan-shaped groove is located to the lower left of the rotating center, so that the tilting direction of the rotating plate 5 is adapted to the tilting angle of the anchor body 6.

[0034] In one embodiment, it also includes: An anchoring agent baffle 20 is fitted onto the anchor rod body 6 and located between the rotating plate 5 and the wall to seal the anchoring agent at the grouting hole; The third internal threaded hole 21 is provided on the side of the positioning steel 2 near the wall; The third threaded rod 22 passes through the third internal threaded hole 21 and points towards the wall, and is used to abut against the anchoring agent baffle 20, so that the anchoring agent baffle 20 is tightly attached to the wall.

[0035] in, Figure 7 The anchoring agent baffle 20 is a common component in the prior art. As long as it is used to block the anchoring agent at the grouting hole, it will generally remain on the anchor rod body 6 after installation. The third threaded rod 22 abuts against the anchoring agent baffle 20, so that the anchoring agent baffle 20 is tightly attached to the wall.

[0036] In one embodiment, Figure 9 The anchoring agent baffle 20 is provided with a second through hole 25, and the anchor rod body 6 passes through the second through hole 25.

[0037] In one embodiment, Figure 10 The anchoring agent baffle 20 is provided with an insertion interface 23. The width of the insertion interface 23 is equal to the diameter of the support end. There are two anchoring agent baffles 20, which are fitted together and their insertion interfaces 23 cover each other. The third threaded rod 22 abuts against one of the anchoring agent baffles 20 away from the wall.

[0038] If the widest part of the anchoring end of the anchor bolt body 6 is larger than the diameter of the support end, the anchoring agent baffle 20 will not be able to fit into the anchor bolt body 6 from the anchoring end. To address this, an insertion interface 29 can be provided on the anchoring agent baffle 20. The width of the insertion interface is equal to the diameter of the support end. After the anchoring agent baffle 20 is inserted into the support end through the insertion interface 23, another anchoring agent baffle 20 with an insertion interface 23 is placed against the outer surface of the previous anchoring agent baffle 20. The two anchoring agent baffles 20 mutually cover each other's insertion interfaces 23. The third threaded rod 22 must abut against the anchoring agent baffle 20 furthest from the wall, ensuring that the anchoring agent baffle 20 is tightly against the wall.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0040] It should be noted that if the embodiments of the invention involve directional indicators (such as up and down), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. Additionally, if the embodiments of the invention involve descriptions such as "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, "several" refers to two or more.

[0042] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the invention.

Claims

1. A coal seam roadway arch-anchor combined support device, comprising an arch foot (1) erected on the inner wall of the coal seam roadway and made of H-beams, characterized in that, Also includes: Positioning steel (2) is installed at a preset position on the arch foot (1); The support frame (3) is set on the positioning steel (2) and has a rotating groove (4) on it. The rotating groove (4) is a symmetrical fan shape in the shape of a bow. The top of the rotating groove (4) is inclined towards the wall. When the rotating plate (5) swings within the first internal threaded hole groove (4), both ends are always in contact with the inner wall of the two arc-shaped ends of the rotating groove (4). The maximum deflection angle is limited by the rotating groove (4). The anchor rod body (6) is installed through the rotating plate (5). The second internal threaded hole (7) is located in the middle of the rotating plate (5), and extends through the thickness direction of the rotating plate (5) to pass through and fix the anchor body (6). An angle locking assembly (8) is installed on the positioning steel (2) to abut against the rotating plate (5) from two opposite directions, with the abutment points located above and below the rotation center of the rotating plate (5) respectively; the rotating plate (5) is fixed after it rotates to a preset angle.

2. The coal seam roadway shed-anchor coordinated support device according to claim 1, characterized in that, The mounting side of the positioning steel (2) is inserted into the arch foot (1), and the supporting side extends to the outside of the arch foot (1). The mounting side is provided with at least two sets of through holes (24); the arch foot (1) is provided with at least two sets of first internal threaded holes (101). It also includes a first bolt (9) for passing through a set of first internally threaded holes (101) and a set of through holes (24) arranged coaxially.

3. The coal seam roadway shed-anchor coordinated support device according to claim 2, characterized in that, The support frame (3) includes: The limiting frame (10) is fixed on the support side of the positioning steel (2), and the rotating groove (4) is located inside the limiting frame (10); A ring plate (11) is fixed on the side of the limiting frame (10) away from the arch foot (1). The ring plate (11) is provided with an inner ring surface (12). The ring plate (11) partially blocks the rotating groove (4) on the side near the inner ring surface (12). The ring plate (11) and the rotating groove (4) together form a limiting groove; the two ends of the rotating plate (5) are symmetrically provided with notch grooves (13), and the notch grooves (13) are slidably inserted into the outer surface of the ring plate (11) near the inner ring surface (12).

4. The coal seam roadway shed-anchor coordinated support device according to claim 3, characterized in that, The angle locking assembly (8) includes a fourth threaded rod (14) and a fifth threaded rod (15). The top of the limiting frame (10) is provided with a fourth internal threaded hole (16) on the side away from the wall; the fifth threaded rod (15) passes through one of the through holes (24) and the fourth internal threaded hole (16) and then abuts against the top left side of the rotating plate (5); The top of the limiting frame (10) is provided with a sixth internal threaded hole (18) near the wall; the fourth threaded rod (14) passes through one of the through holes (24) and the sixth internal threaded hole (18) and then abuts against the bottom right side of the rotating plate (5).

5. The coal seam roadway shed-anchor coordinated support device according to claim 1, characterized in that, The anchor body (6) has a first external thread at its support end for threaded connection with the second internal thread hole (7), and its anchoring end is used to be inserted into the wall at an angle downward.

6. The coal seam roadway shed-anchor coordinated support device according to claim 4, characterized in that, The limiting frame (10) has a vertically opened installation port (19) at its center. The installation port (19) passes through the ring plate (11) and is connected to the rotating groove (4). The top of the rotating groove (4) is located between the installation port (19) and the wall, and the bottom of the rotating groove (4) is located on the side of the installation port (19) away from the wall.

7. The coal seam roadway shed-anchor coordinated support device according to claim 1 or 4, characterized in that, Also includes: An anchoring agent baffle (20) is fitted onto the anchor rod body (6) and located between the rotating plate (5) and the wall to seal the anchoring agent at the grouting hole; The third internal threaded hole (21) is provided on the side of the positioning steel (2) near the wall; The third threaded rod (22) passes through the third internal threaded hole (21) and points towards the wall, and is used to abut against the anchoring agent baffle (20) so that the anchoring agent baffle (20) is tightly attached to the wall.

8. The coal seam roadway shed-anchor coordinated support device according to claim 7, characterized in that, The anchoring agent baffle (20) is provided with a through hole two (25), and the anchor rod body (6) passes through the through hole two (25).

9. The coal seam roadway shed-anchor coordinated support device according to claim 7, characterized in that, The anchoring agent baffle (20) is provided with an insertion interface (23), the width of which is equal to the diameter of the support end; there are two anchoring agent baffles (20), which are fitted together and their insertion interfaces (23) cover each other; the third threaded rod (22) abuts against one of the anchoring agent baffles (20) away from the wall.

10. The coal seam roadway shed-anchor coordinated support device according to claim 5, characterized in that, The diameter of the anchoring end of the anchor body (6) is smaller than the diameter of the support end.

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