Coal mine supporting anchor rod drilling machine

Abstract

The invention belongs to the technical field of mine tunnel supporting, and particularly relates to a coal mine supporting anchor rod drilling machine which comprises a hydraulic oil cylinder arranged on a drill carriage and a jacking mechanism arranged at the top end of the hydraulic oil cylinder. The ejector rod assemblies are distributed on the top plate at equal intervals, and each ejector rod assembly comprises a row of fixed ejector rods which are fixedly arranged in the middle of the top plate; the movable ejector rods are movably mounted on the ejector plate, and the movable ejector rods are arranged on the two sides of each fixed ejector rod correspondingly; the two adjacent edges of the connecting rod structure are rotationally connected, and the two fixed ejector rods are installed in the middles of the two edges, located on the two sides, of the three parallel edges of the connecting rod structure correspondingly; and the hole aligning structure is mounted on the top plate. The ejector rod assembly is directly inserted into the top of the roadway by crossing the meshes, the situation that the reinforcing mesh breaks away from a temporary fixing point due to vibration force during drilling is avoided, and deviation of the reinforcing mesh is effectively relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of mine roadway support; specifically, the present invention relates to a coal mine support bolt drill rig. Background Art

[0002] A bolt drill rig is a device for completing the drilling operation of bolt holes in the coal mine roadway support operation. Its main components include a drill carriage, drill arms arranged on both sides of the drill carriage, and a jacking module installed on the drill carriage. The core function of the jacking module is to improve the stability of the drill carriage by jacking against the top of the roadway during the drilling process, so as to assist the drill carriage to effectively resist the vibration during drilling and improve the drilling effect and accuracy. The current jacking module mainly uses a hydraulic cylinder to push the top plate, so that the top plate directly presses against the top of the roadway. Since the top plate is in a state of surface contact with the top of the roadway, after the steel mesh in the roadway is temporarily fixed, the top plate will press against the steel mesh. At this time, the vibration force generated during the drilling of the drill carriage will be directly applied to the steel mesh, and combined with the pressure of the top plate on the steel mesh, it is very easy to cause the steel mesh to break free from the temporary fixing points and shift. In view of this, the present application provides a coal mine support bolt drill rig. Summary of the Invention

[0003] In view of this, the present invention provides a coal mine support bolt drill rig, which is connected to the top wall of the roadway in a direct insertion manner by passing through the mesh holes of the steel frame mesh, avoiding excessive extrusion or vibration force transmission to the steel mesh, thereby solving or at least alleviating the problem that the steel mesh breaks free from the temporary fixing and shifts due to the extrusion force and vibration force existing in the prior art.

[0004] To achieve the foregoing object, the present invention provides a coal mine support bolt drill rig, including a hydraulic cylinder arranged on a drill carriage and a jacking mechanism arranged at the top end of the hydraulic cylinder. The jacking mechanism includes: a support plate connected to the top end of the hydraulic cylinder to transmit the jacking force; a top plate arranged to be lifted and lowered on the top of the support plate, and an elastic member is arranged between the top plate and the support plate; a top rod assembly evenly distributed on the top plate. The top rod assembly includes: a fixed top rod, a row of which is fixedly arranged in the middle of the top plate; a movable top rod, which is movably installed on the top plate, and one is arranged on both sides of each fixed top rod; a connecting rod structure, in a "day" - shaped structure, with adjacent two sides rotatably connected, and the two fixed top rods are respectively installed in the middle of the two sides of the three parallel sides of the connecting rod structure; an alignment hole structure, installed on the top plate, fixedly connected to the middle of one of the three parallel sides of the connecting rod structure, and capable of moving the connecting rod structure according to the offset amount between the center of the mesh hole of the fixed top rod and the steel mesh so that the movable top rod aligns with the mesh hole; the movable connecting rod passes through the alignment hole structure, and the movable top rod is jacked up by the support plate and inserted into the top of the roadway after the fixed top rod is inserted into the top of the roadway.

[0005] Preferably, the distance between the fixed top rod and the movable top rods on both sides is adapted to the spacing between the centers of the mesh of the steel mesh, and after the fixed top rod and the movable top rod are inserted into the top of the roadway, the roof plate and the steel mesh are separated.

[0006] Preferably, the push rod assembly further includes: a lateral collar, slidably sleeved on the outside of the movable push rod and fixedly connected to one side of the connecting rod structure; a lateral annular groove, disposed within the top plate, wherein the cross-sections of the lateral collar and the lateral annular groove are both cross-shaped; the lateral collar can move in any direction on the horizontal plane within the lateral annular groove, and the lateral collar is always supported by the lateral annular groove.

[0007] Preferably, the hole-connecting structure includes: a central collar, fixedly connected to the middle position of one of the three parallel sides of the connecting rod structure, with an inner diameter larger than the outer diameter of the fixed top rod; an expansion block, one on each side corresponding to the central collar, and the expansion block is radially slidably mounted on the connecting rod structure, with its outer surface being a semi-circular surface, and when expanding, it enters the two opposite corners of the mesh by abutting against the two opposite sides of the mesh in an inclined direction on the horizontal plane; an elastic telescopic rod, the protruding end of which is fixedly connected to the central collar; and a strip plate, the elastic telescopic rod... The fixed end of the rod is fixedly connected to the upper surface of the strip plate; a central fan-shaped groove is provided in the top plate, the strip plate is located in the central fan-shaped groove, and the strip plate can move in any direction on the horizontal plane within the central fan-shaped groove; a wedge block is fixedly provided on both sides of the expansion block, and its inner side is an inclined surface; a top block is provided on the inner side of each wedge block, and the top block is fixedly installed on the fixed end of the elastic telescopic rod, and the top block causes the expansion block to expand by pressing the inclined surface of the expansion block upward.

[0008] Preferably, the hole-connecting structure further includes a stop bar, which is slidably sleeved on the outside of the fixed top rod in the height direction and located at the top of the middle collar. The length of the stop bar is greater than the diagonal distance of the mesh, and the stop bar is set to be parallel to the roadway.

[0009] Preferably, the top of the expansion block extends beyond the stop bar, and the height difference between the top of the expansion block and the top of the stop bar is adapted to the mesh thickness.

[0010] Preferably, the hole-connecting structure further includes: a plug rod, the inner end of which is fixedly connected to the expansion block, and the wedge blocks on both sides of the expansion block are respectively fixed to both sides of the inner end of the plug rod, and the outer end of the plug rod is inserted into the connecting rod structure; a return spring, which is disposed in the connecting rod structure, the inner end of which is connected to the outer end of the plug rod, for providing an inward elastic force to the plug rod.

[0011] Preferably, the upper and lower sides of the central sector groove are respectively provided with a sector-shaped through groove and a strip-shaped through groove, and the elastic telescopic rod can move in any direction along the strip plate on the horizontal plane within the sector-shaped through groove, and the strip-shaped through groove is provided on both sides of the bottom of the central sector groove.

[0012] Preferably, a rubber block is fixedly provided at the bottom of the movable top rod, and a rubber plate is provided on the upper surface of the support plate.

[0013] Preferably, the top ends of both the fixed top rod and the movable top rod are configured as hemispherical structures, and the distance between two adjacent top rod assemblies is an integer multiple of the center distance between two adjacent meshes.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The top rod assembly of this application, through the fixed top rod and the movable top rod passing through the mesh of the steel mesh, directly abuts against the top of the roadway. During the stabilization of the drilling rig, the vibration force of the drilling rig will not be directly applied to the steel mesh, and the steel mesh will not be excessively squeezed. Thus, the problem of the steel mesh breaking away from the temporary fixing point and causing displacement is greatly alleviated.

[0015] 2. The hole-aligning structure of this application adjusts the movement of the movable top rod by using a linkage structure based on the offset between the fixed top rod and the center of the mesh, so that the movable top rod can be better aligned with the mesh, thereby effectively ensuring that the movable top rod can smoothly pass through the mesh and reach the top of the roadway.

[0016] 3. When adjusting the position of the movable push rod in the hole structure and connecting rod structure of this application, the movable push rod is located below the mesh hole, so that the movable push rod can adjust its position before being inserted into the mesh hole. Attached Figure Description

[0017] The disclosure of this invention will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the coal mine support anchor drilling rig in this application; Figure 2 For this application Figure 1 A partial schematic diagram; Figure 3 For this application Figure 2 A schematic diagram of the top plate after it has been cut open; Figure 4 This is a schematic diagram showing the middle side of the three parallel sides of the connecting rod in this application after being cut open; Figure 5 For this application Figure 3 Schematic diagram of the central top slab; Figure 6 For this application Figure 5 Another perspective view of the top plate in the application.

[0018] Reference numerals: 1 - hydraulic cylinder; 2 - support plate; 3 - top plate; 4 - elastic member; 5 - fixed ejector rod; 6 - movable ejector rod; 7 - connecting rod structure; 8 - lateral collar; 9 - lateral annular groove; 10 - middle collar; 11 - expansion block; 12 - elastic telescopic rod; 13 - strip plate; 14 - middle sector groove; 15 - wedge block; 16 - top block; 17 - stop rod; 18 - plug rod; 19 - return spring; 20 - sector through - slot; 21 - strip through - slot; 22 - rubber block; 23 - rubber plate. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figures 1 to 6 shown, this application provides a coal mine support bolt drill, which includes a hydraulic cylinder 1 arranged on a drilling vehicle and a tightening mechanism arranged at the top end of the hydraulic cylinder 1. The tightening mechanism includes: a support plate 2 connected to the top end of the hydraulic cylinder 1 to transmit the tightening force; a top plate 3 arranged to be lifted and lowered on the top of the support plate 2, and an elastic member 4 is arranged between the top plate 3 and the support plate 2; a ejector rod assembly evenly distributed on the top plate 3; The ejector rod assembly includes: a fixed ejector rod 5, a row of which is fixedly arranged in the middle of the top plate 3; a movable ejector rod 6, which is movably installed on the top plate 3, and one is arranged on both sides corresponding to each fixed ejector rod 5; a connecting rod structure 7, in a "day" - shaped structure, with its adjacent two sides rotatably connected, and the two fixed ejector rods 5 are respectively installed in the middle of the two side - located parallel sides of the three parallel sides of the connecting rod structure 7; an alignment structure, installed on the top plate 3, fixedly connected to the middle position of one of the three parallel sides of the connecting rod structure 7, which can move the connecting rod structure 7 according to the offset amount between the center of the fixed ejector rod 5 and the mesh hole center of the wire mesh so that the movable ejector rod 6 is aligned with the mesh hole; the movable connecting rod passes through the alignment structure, and the movable ejector rod 6 is pushed up by the support plate 2 and inserted into the roof of the roadway after the fixed ejector rod 5 is inserted into the roof of the roadway.

[0021] Specifically, in this embodiment, the elastic element 4 is a longitudinal, large-diameter elastic telescopic rod. The support plate 2 supports the top plate 3 through a support spring. After the fixed top rod 5 abuts against the top of the tunnel, the support plate 2 continues to move upward, compressing the support spring. During this process, the hole structure can adjust the position of the movable top rod 6 according to the distance between the fixed top rod 5 and the center of the mesh, so that the movable top rod 6 is aligned with the center of the mesh above it. Afterward, the support plate 2 continues to move upward, pushing the movable top rod 6 upward, so that the movable top rod 6 is inserted into the top of the tunnel.

[0022] The distance between the fixed top rod 5 and the movable top rods 6 on both sides is adapted to the spacing of the mesh center of the steel mesh, and after the fixed top rod 5 and the movable top rod 6 are inserted into the top of the roadway, the roof plate 3 and the steel mesh are separated.

[0023] The coal mine support anchor drilling rig of this application, by setting a fixed top rod 5 and a movable top rod 6 of the top rod assembly, directly inserts them into the top of the roadway after passing through the mesh, and combines the jacking force of the hydraulic cylinder 1 to be applied in the opposite direction to the drilling rig. This not only improves the stability of the drilling rig during drilling operations and improves the anchor drilling effect and accuracy, but also ensures that the supporting force is not directly applied to the steel mesh. During drilling operations, the steel mesh will not be displaced due to vibration breaking free of the temporary fixing point.

[0024] The push rod assembly also includes: a lateral collar 8, which is slidably sleeved on the outside of the movable push rod 6 and fixedly connected to one side of the connecting rod structure 7; a lateral ring groove 9, which is set inside the top plate 3, and the cross sections of the lateral collar 8 and the lateral ring groove 9 are both "+" shaped; the lateral collar 8 can move in any direction on the horizontal plane within the lateral ring groove 9, and the lateral collar 8 is always supported by the lateral ring groove 9.

[0025] In its initial state, the movable top rod 6 is at its lowest position. At this time, the top height of the movable top rod 6 is much smaller than the top height of the fixed top rod 5. This provides a field of vision for the workers on the drilling rig to directly observe the top of the fixed top rod 5, facilitating the adjustment of the drilling rig position so that the fixed top rod 5 can pass through the mesh and be directly inserted into the top of the roadway. Simultaneously, the cooperation between the lateral collar 8 and the lateral groove 9 allows the movable top rod 6 to move in any direction on the horizontal plane to achieve alignment with the mesh.

[0026] The hole structure includes: a central collar 10, fixedly connected to the middle of one of the three parallel sides of the connecting rod structure 7, with an inner diameter larger than the outer diameter of the fixed top rod 5; expansion blocks 11, one on each side of the central collar 10, and the expansion blocks 11 are radially slidably mounted on the connecting rod structure 7, with a semi-circular outer surface, which expands by abutting against the two opposite sides of the mesh in an inclined direction on the horizontal plane and entering the two opposite corners of the mesh; an elastic telescopic rod 12, the protruding end of which is fixedly connected to the central collar 10; and a strip plate 13, which is the fixing point of the elastic telescopic rod 12. The fixed end is fixedly connected to the upper surface of the strip plate 13; the central fan-shaped groove 14 is set in the top plate 3, the strip plate 13 is located in the central fan-shaped groove 14, and the strip plate 13 can move in any direction on the horizontal plane within the central fan-shaped groove 14; a wedge block 15 is fixedly set on both sides of the expansion block 11, and its inner side is an inclined surface; a top block 16 is set on the inner side of the wedge block 15, and the top block 16 is fixedly installed on the fixed end of the elastic telescopic rod 12. The top block 16 causes the expansion block 11 to expand by pressing the inclined surface of the expansion block 11 upward.

[0027] When the fixed top rod 5 passes through the mesh and is inserted into the tunnel, the two expansion blocks 11 are located inside the mesh. As the support plate 2 continues to move upward, the support spring causes the top plate 3 to move upward. At this time, the expansion blocks 11 cannot move upward after contacting the top of the tunnel, thus causing the top plate 3 to move upward relative to the expansion blocks 11. During this process, the top plate 3 compresses the elastic telescopic rod 12 upward and drives the top block 16 to move upward. The inclined surface of the top block 16 cooperates with the inclined surface of the wedge block 15, allowing the top block 16 to push the wedge block 15 outward. The wedge block 15 drives the expansion blocks 11 to move outward. At this time, the two expansion blocks 11 move towards the two opposite inner walls of the mesh.

[0028] If the fixed top rod 5 is eccentric within the mesh, during the expansion of the two expansion blocks 11, the expansion block 11 on the side with a smaller distance from the mesh sidewall will contact the mesh sidewall first. Then, as the top block 16 continues to move upward and push the wedge block 15 outward, the expansion block 11 that first contacted the mesh sidewall cannot continue to move outward. Thus, the reverse force will push the top block 16 on that side to move to the opposite side. Since the top block 16 is fixedly connected to the fixed end of the elastic telescopic rod 12, the top block 16 will drive the elastic telescopic rod 12 to move to the opposite side. At this time, the middle collar 10 can move. During the movement, the middle collar 10 will drive all the movable top rods 6 to adjust their positions below the mesh through the connecting rod structure 7.

[0029] The movable top rod 6 moves in the opposite direction to the fixed top rod 5 relative to the mesh opening. Simultaneously, because adjacent sides of the linkage structure 7 are rotatably connected, the two expansion blocks 11, while abutting the inner wall of the mesh opening, move towards the two corners of the mesh diagonal under the guidance of the mesh wall. During this process, the central collar 10 rotates, and the linkage structure 7 rotates synchronously with it, so that all three parallel sides of the linkage structure 7 are ultimately aligned with the diagonal of the mesh opening.

[0030] By using the two diagonals of the mesh as the ultimate limit positions for controlling the offset of the movable top rod 6, the error caused by the bending of the steel mesh frame at the top of the roadway can be mitigated. Furthermore, the expansion block 11 exhibits greater stability after entering the diagonal. In addition, the area where the mesh is located on the diagonal is the node area connecting the mesh openings; this part has greater strength and toughness and is less prone to deformation by the expansion block 11, resulting in a stronger stabilizing effect on the movable top rod 6.

[0031] The hole structure also includes a stop bar 17, which is slidably sleeved on the outside of the fixed top rod 5 in the height direction and located at the top of the central collar 10. The length of the stop bar 17 is greater than the diagonal distance of the mesh, and the stop bar 17 is set parallel to the roadway. The top of the expansion block 11 extends beyond the stop bar 17, and the height difference between the top of the expansion block 11 and the top of the stop bar 17 is adapted to the mesh thickness.

[0032] The baffle 17 is designed so that after the fixed top rod 5 abuts against the top of the tunnel, it contacts the lower surface of the steel mesh, ensuring that the top of the expansion block 11 is within the thickness range of the mesh opening. This prevents the expansion block 11 from contacting the top of the tunnel, thereby reducing the resistance encountered by the expansion block 11 during its expansion. Simultaneously, since the main bending direction of the steel mesh within the tunnel is the width direction, the baffle 17 is positioned parallel to the tunnel. This effectively ensures that the baffle 17 can simultaneously press the front and rear ends of the central mesh opening of the steel mesh in a horizontal state. On one hand, this greatly mitigates the impact of steel mesh deformation on the effective insertion of the expansion block 11 into the mesh opening; on the other hand, the pressure improves the consistency of the height of the front and rear ends of the mesh opening, allowing the expansion block 11 to more effectively contact the inner wall of the mesh opening.

[0033] The hole-fitting structure also includes: an insertion rod 18, the inner end of which is fixedly connected to the expansion block 11, and wedge-shaped blocks 15 on both sides of the expansion block 11 are respectively fixed to the two sides of the inner end of the insertion rod 18; the outer end of the insertion rod 18 is inserted into the connecting rod structure 7; and a return spring 19, which is disposed in the connecting rod structure 7, the inner end of which is connected to the outer end of the insertion rod 18, and is used to provide an inward elastic force to the insertion rod 18. In the initial state, the return spring 19, through the insertion rod 18, keeps the expansion block 11 always in the innermost position, thereby minimizing the distance between the two expansion blocks 11, so that the two expansion blocks 11 can be inserted into the mesh more effectively.

[0034] The upper and lower sides of the central sector-shaped trough 14 are respectively provided with sector-shaped channels 20 and strip channels 21. The elastic telescopic rod 12 can move in any direction on the horizontal plane along with the strip plate 13 within the sector-shaped channel 20. The strip channels 21 are provided on both sides of the bottom of the central sector-shaped trough 14. The sector-shaped channels provide sufficient space for the movement of the elastic telescopic rod 12. At the same time, the strip channels 21 allow small coal particles that fall into the sector-shaped channel 20 to be effectively detached.

[0035] Specifically, in this embodiment, the movable distance of the elastic telescopic rod 12 in the fan-shaped channel, the movable distance of the central collar 10 in the central fan-shaped groove 14, and the movable distance of the lateral collar 8 in the lateral ring groove 9 can all be adapted to the maximum expansion stroke of the expansion block 11.

[0036] A rubber block 22 is fixedly installed at the bottom of the movable top rod 6, and a rubber plate 23 is installed on the upper surface of the support plate 2. This arrangement ensures that when the bottom of the movable top rod 6 is pushed up by the support plate 2 and its top is inserted into the tunnel, the rubber plate 23 abuts against the bottom of the rubber block 22. Utilizing the high friction property between the rubber plate 23 and the rubber block 22, the stability of the movable top rod 6 on the support plate 2 is improved, thereby enhancing the overall stability of the support plate 2, the top plate 3, and the top rod assembly, effectively improving the stability of the drilling rig.

[0037] Both the fixed top rod 5 and the movable top rod 6 have hemispherical tops, and the distance between two adjacent top rod assemblies is an integer multiple of the center-to-center distance between two adjacent mesh openings. This design improves the stability of the fixed top rod 5 and the movable top rod 6 when inserted into the roadway.

[0038] It should be noted that in this application, after both the fixed top rod 5 and the movable top rod 6 are inserted into the top of the roadway, both the fixed top rod 5 and the movable top rod 6 have strong stability. At this time, the fixed top rod 5 and the movable top rod 6 can effectively stabilize the hole structure and the connecting rod structure 7, so that the whole has strong stability.

[0039] The technical scope of this invention is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the scope of this invention.

Claims

1. A coal mine support anchor drilling rig, comprising a hydraulic cylinder (1) mounted on a drilling rig and a tightening mechanism mounted on the top of the hydraulic cylinder (1), characterized in that, The jacking mechanism includes: A support plate (2), connected to the top end of the hydraulic cylinder (1) to transmit the jacking force; A top plate (3), arranged to be lifted and lowered on the top of the support plate (2), and an elastic member (4) is provided between the top plate (3) and the support plate (2); A thimble assembly evenly distributed on the top plate (3), and the thimble assembly includes: Fixed thimbles (5), fixedly arranged in a row in the middle of the top plate (3); Movable thimbles (6), movably installed on the top plate (3), and one is arranged on both sides corresponding to each of the fixed thimbles (5); A connecting rod structure (7), in a "day" - shaped structure, with its adjacent two sides rotatably connected, and the two fixed thimbles (5) are respectively installed in the middle of the two sides located on both sides of the three parallel sides of the connecting rod structure (7); An alignment hole structure, installed on the top plate (3), fixedly connected to the middle position of one of the three parallel sides of the connecting rod structure (7), and can move the connecting rod structure (7) according to the offset amount between the center of the fixed thimble (5) and the mesh hole center of the steel mesh sheet so that the movable thimble (6) aligns with the mesh hole; The movable connecting rod passes through the alignment hole structure, and after the fixed thimble (5) is inserted into the top of the roadway, the movable thimble (6) is jacked up by the support plate (2) and inserted into the top of the roadway.

2. The coal mine support anchor drilling rig as described in claim 1, characterized in that, The distance between the fixed thimble (5) and the movable thimbles (6) on both sides of it is adapted to the pitch of the mesh hole centers of the steel mesh sheet, and after the fixed thimble (5) and the movable thimbles (6) are inserted into the top of the roadway, the top plate (3) and the steel mesh sheet are in a separated state.

3. The coal mine support anchor drilling rig as described in claim 1, characterized in that, The thimble assembly further includes: A lateral collar (8), slidably sleeved outside the movable thimble (6), and fixedly connected to one of the sides of the connecting rod structure (7); A lateral annular groove (9), arranged in the top plate (3), and the cross - sections of the lateral collar (8) and the lateral annular groove (9) are both in a "plus" shape; The lateral collar (8) can move in any direction on the horizontal plane in the lateral annular groove (9), and the lateral collar (8) is always supported by the lateral annular groove (9).

4. The coal mine support anchor drilling rig as described in claim 1, characterized in that, The alignment hole structure includes: A middle collar (10), fixedly connected to the middle position of one of the three parallel sides of the connecting rod structure (7), and its inner diameter is larger than the outer diameter of the fixed thimble (5); Expansion blocks (11), one is arranged on both sides corresponding to the middle collar (10), and the expansion blocks (11) are radially slidably installed on the connecting rod structure (7), and their outer side surfaces are semi - circular surfaces, and when they expand, they enter into the two diagonals of the mesh hole by abutting against the two opposite sides of the mesh hole in an inclined direction on the horizontal plane; An elastic telescopic rod (12), whose extending end is fixedly connected to the middle collar (10); A strip - shaped plate (13), the fixed end of the elastic telescopic rod (12) is fixedly connected to the upper surface of the strip - shaped plate (13); A central sector groove (14) is provided in the top plate (3), the strip plate (13) is located in the central sector groove (14), and the strip plate (13) can move in any direction on the horizontal plane in the central sector groove (14); A wedge-shaped block (15) is fixedly provided on both sides of the expansion block (11), and its inner side is an inclined surface; A top block (16) is provided on the inner side of each of the wedge blocks (15). The top block (16) is fixedly installed on the fixed end of the elastic telescopic rod (12). The top block (16) causes the expansion block (11) to expand by pressing the inclined surface of the expansion block (11) upward.

5. A coal mine support anchor drilling rig as described in claim 4, characterized in that, The hole structure also includes a stop bar (17), which is slidably sleeved on the outside of the fixed top rod (5) in the height direction and located at the top of the middle collar (10). The length of the stop bar (17) is greater than the diagonal distance of the mesh, and the stop bar (17) is set to be parallel to the roadway.

6. The coal mine support anchor drilling rig as described in claim 5, characterized in that, The top of the expansion block (11) extends beyond the stop bar (17), and the height difference between the top of the expansion block (11) and the top of the stop bar (17) is adapted to the mesh thickness.

7. A coal mine support anchor drilling rig as described in claim 4, characterized in that, The hole structure further includes: The inner end of the insertion rod (18) is fixed to the expansion block (11), and the wedge blocks (15) on both sides of the expansion block (11) are respectively fixed to the two sides of the inner end of the insertion rod (18), and the outer end of the insertion rod (18) is inserted into the connecting rod structure (7). A return spring (19) is provided inside the connecting rod structure (7), with its inner end connected to the outer end of the insertion rod (18), and is used to provide an inward elastic force to the insertion rod (18).

8. The coal mine support anchor drilling rig as described in claim 4, characterized in that, The upper and lower sides of the central fan-shaped groove (14) are respectively provided with a fan-shaped through groove (20) and a strip through groove (21), and the elastic telescopic rod (12) can move in any direction along the strip plate (13) on the horizontal plane within the fan-shaped through groove (20). The strip through groove (21) is provided on both sides of the bottom of the central fan-shaped groove (14).

9. A coal mine support anchor drilling rig as described in claim 1, characterized in that, A rubber block (22) is fixedly installed at the bottom of the movable top rod (6), and a rubber plate (23) is installed on the upper surface of the support plate (2).

10. A coal mine support anchor drilling rig as described in claim 1, characterized in that, The top ends of both the fixed top rod (5) and the movable top rod (6) are configured as hemispherical structures, and the distance between two adjacent top rod components is an integer multiple of the center distance between two adjacent meshes.

Images