Underground coal mine supporting anchor rod structure

Abstract

The utility model relates to the technical field of coal mining, in particular to a coal mine underground supporting anchor rod structure which comprises a hollow anchor rod, a plugging assembly, a plurality of reinforcing assemblies, a plurality of supporting rods and a plurality of supporting rods. The reinforcing assembly comprises a conical cover movably arranged on the outer side of the hollow anchor rod in a sleeving mode, and a plurality of positioning strips are fixedly installed on the surface of the outer side of the conical cover at equal angles. The hollow anchor rod is inserted into the hole which is drilled in advance, then concrete is poured into the hole from the interior of the hollow anchor rod, the contact face between the hollow anchor rod and the hole is increased, the hollow anchor rod is fixed through the reinforcing assembly, and then the hollow anchor rod is rotated to enable the conical block to push the conical cover to be unfolded. Meanwhile, the influence of gravel in the hole on fixing of the hollow anchor rod is avoided, the firmness of the hollow anchor rod after being embedded is improved, and the hollow anchor rod is prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to an underground support anchor structure for a coal mine. Background Art

[0002] Anchor support refers to a reinforcement support method used in surface engineering projects such as slopes and deep rock foundation pits, as well as underground chambers such as tunnels and stopes. Rods are made of metal, wood, polymer or other materials and driven into pre-drilled holes in the surface rock or the rock around the chamber. The special structure of the head and rod body and the tail support plate are used, or the bonding effect is relied upon to combine the surrounding rock with the stable rock mass, thereby producing a suspension effect, a composite beam effect, and a reinforcement effect to achieve the purpose of support.

[0003] Publication number: CN221503338U, discloses "a coal mine support anchor fixing structure, wherein a motor is provided at the top of the anchor, a connecting rod is provided at the output end of the motor, a first gear and a second gear are provided on the outer surface of the connecting rod, a first clamping block is provided on the outer surface of the first gear, a first clamping slot is defined at one end of the first clamping block, a second clamping block is provided on the outer surface of the second gear, a second clamping slot is provided at one end of the second clamping block, a first movable block and a first spring are provided within the first mounting slot, and a second movable block and a second spring are provided within the second mounting slot."

[0004] There are still certain disadvantages in use. The anchor rod is fixed by inserting multiple blocks into pre-drilled holes, and the inside of the holes is mostly rock. When multiple blocks with the same extension distance are pressed against the inner wall of the hole, the contact area between the anchor rod and the hole is small, and the anchor rod is not firmly fixed. In addition, when there is gravel at a block inside the hole, the gravel presses against one block, which will cause the remaining blocks moving synchronously to be blocked, and it is not convenient to extend to the position against the hole, which easily leads to loose fixation. Utility Model Content

[0005] The purpose of the utility model is to provide a support anchor structure for an underground coal mine to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A coal mine underground support anchor structure, comprising:

[0008] A hollow anchor rod, wherein the outer surface of the hollow anchor rod is provided with a thread groove;

[0009] A plugging assembly is movably arranged at one end of the outer side of the hollow anchor rod;

[0010] Multiple reinforcement components are movably mounted on the outside of the hollow anchor rod. The reinforcement components include a conical cover movably mounted on the outside of the hollow anchor rod. Multiple positioning strips are fixedly installed at equal angles on the outer surface of the conical cover. A conical block is movably mounted on the outside of the conical cover on the outside of the hollow anchor rod.

[0011] Furthermore, a plurality of casting holes are equidistantly provided on the outer surface of the hollow anchor rod above the conical cover, and a hollow block is fixedly mounted on the surface of one end of the hollow anchor rod.

[0012] Furthermore, the inner surface of the conical block is fixedly provided with a thread, and the conical block is screwed together with the thread groove through the thread.

[0013] Furthermore, the blocking component includes:

[0014] The pad is movably sleeved on one end of the outer surface of the hollow anchor rod;

[0015] The conical rubber sleeve is movable and is arranged on the outer surface of the hollow anchor rod at one side of the pad.

[0016] Preferably, a nut is movably sleeved on the outer surface of the hollow anchor rod on the other side of the pad, and the nut is screwed into the thread groove.

[0017] Furthermore, a plurality of fixing plates are fixedly installed at equal intervals on the inner surface of the conical cover, and a plurality of guide plates are fixedly installed at equal intervals on the surface of one end of the conical cover.

[0018] Preferably, a plurality of expansion grooves are provided on the outer surface of the conical cover at equal angles, the outer surface of the conical block is movably fitted with the inner surface of the conical cover, and the lower end of the conical block is movably fitted with the upper end of the fixing plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. Apply a release agent to the outside of the hollow anchor rod so that after the concrete is poured between the hole and the hollow anchor rod, the hollow anchor rod can be separated from the concrete and rotated, thereby increasing the contact surface between the hollow anchor rod and the hole by pouring concrete into the hole. When the hollow anchor rod rotates, it drives the conical block to move and expand the conical cover so that the conical cover can resist the solidified concrete and further resist the concrete. At the same time, it also avoids the influence of gravel in the hole on the fixation of the hollow anchor rod, increases the firmness of the hollow anchor rod after burial, and prevents the hollow anchor rod from falling off.

[0021] 2. The fixing piece and the inner wall of the cone cover are stuck on the outside of the cone block to limit the position of the cone cover. The positioning strip is stuck inside the concrete to prevent the cone cover from rotating and improve its firmness. The guide piece plays a guiding role, allowing the cone cover to be inserted into the pre-drilled hole more smoothly to avoid gravel getting stuck in the cone cover.

[0022] 3. Tighten the nut to fix the pad at the hole entrance. After the hollow anchor is installed, move the conical rubber sleeve and insert it into the hole to block the space between the hole entrance and the hollow anchor to prevent concrete from flowing out of the hole entrance. Pump the concrete into the hollow anchor through the external pump body and discharge it into the hole from multiple casting holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the overall split structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the overall vertical cross-sectional structure of the utility model;

[0026] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0027] In the figure: 1. Hollow anchor rod; 101. Threaded groove; 102. Casting hole; 103. Hollow block; 2. Sealing assembly; 201. Pad; 202. Nut; 203. Conical rubber sleeve; 3. Reinforcement assembly; 301. Conical cover; 302. Expansion groove; 303. Positioning strip; 304. Guide plate; 305. Fixing plate; 306. Conical block; 307. Thread. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-4 In an embodiment of the utility model, a coal mine underground support anchor structure includes a hollow anchor 1, a threaded groove 101 is opened on the outer surface of the hollow anchor 1, a sealing component 2 is movably arranged at one end of the outer side of the hollow anchor 1, and multiple reinforcement components 3 are movably sleeved on the outer side of the hollow anchor 1. The reinforcement component 3 includes a conical cover 301 movably sleeved on the outer side of the hollow anchor 1, and multiple positioning bars 303 are fixedly installed at equal angles on the outer surface of the conical cover 301. A conical block 306 is movably sleeved on the outer side of the conical cover 301.

[0030] Specifically, the hole opening is sealed by the blocking component 2 to prevent the concrete from flowing out of the hole opening, and the reinforcement component 3 is unfolded to resist the concrete, thereby increasing the firmness of the hollow anchor rod 1. Example

[0031] like Figure 2 and Figure 3 As shown, in this embodiment, a plurality of casting holes 102 are equidistantly provided on the outer surface of the hollow anchor rod 1 above the conical cover 301, and a hollow block 103 is fixedly installed on the surface of one end of the hollow anchor rod 1; a thread 307 is fixedly provided on the inner surface of the conical block 306, and the conical block 306 is screwed together with the thread groove 101 through the thread 307.

[0032] In this embodiment, the hollow block 103 makes it easier for external tools to clamp and fix, and it is easy to twist the hollow anchor rod 1. A release agent is applied to the outside of the hollow anchor rod 1, so that after the concrete is poured between the hole and the hollow anchor rod 1, the hollow anchor rod 1 can be separated from the concrete and rotated. Therefore, by inserting the hollow anchor rod 1 into the pre-drilled hole, and then pouring concrete from the inside of the hollow anchor rod 1 into the hole, the contact surface between the hollow anchor rod 1 and the hole is increased. When installing the conical cover 301, it is installed to the specified position by screwing the thread 307 with the thread groove 101, and then the conical cover 301 and the hollow anchor rod 1 are fixed by welding. When the hollow anchor rod 1 rotates, the conical block 306 is driven to move, and the conical cover 301 is expanded, so that the conical cover 301 is against the solidified concrete, further against the concrete, and at the same time, the influence of gravel in the hole on the fixation of the hollow anchor rod 1 is avoided, the firmness of the hollow anchor rod 1 after burial is increased, and the hollow anchor rod 1 is prevented from falling off.

[0033] like Figure 2-4 As shown, in this embodiment, a plurality of fixing plates 305 are fixedly installed at equal distances on the inner surface of the conical cover 301, and a plurality of guide plates 304 are fixedly installed at equal distances on the surface of one end of the conical cover 301; a plurality of expansion grooves 302 are opened at equal angles on the outer surface of the conical cover 301, the outer surface of the conical block 306 is movably fitted with the inner surface of the conical cover 301, and the lower end of the conical block 306 is movably fitted with the upper end of the fixing plate 305.

[0034] During specific implementation, the fixing piece 305 and the inner wall of the conical cover 301 are stuck on the outside of the conical block 306 to limit the position of the conical cover 301. The positioning bar 303 is stuck inside the concrete to prevent the conical cover 301 from rotating and improve its firmness. The guide piece 304 plays a guiding role, allowing the conical cover 301 to be inserted into the pre-drilled hole more smoothly to prevent gravel from getting stuck in the conical cover 301. Example

[0035] On the basis of the first embodiment, in order to solve the problem that the concrete easily flows out from the pre-opened holes during pouring of the concrete.

[0036] like Figure 1-3As shown, in this embodiment, the sealing assembly 2 includes: a pad 201 movably mounted on one end of the outer surface of the hollow anchor rod 1, and a conical rubber sleeve 203 movably mounted on the outer surface of the hollow anchor rod 1 on one side of the pad 201; the outer surface of the hollow anchor rod 1 is located on the other side of the pad 201 and is movably mounted with a nut 202, and the nut 202 is screwed together with the thread groove 101.

[0037] During specific implementation, the nut 202 is screwed to fix the pad 201 at the hole mouth. After the hollow anchor rod 1 is installed, the conical rubber sleeve 203 is moved to be inserted into the hole to block the space between the hole mouth and the hollow anchor rod 1 to prevent concrete from flowing out of the hole mouth. The concrete is pumped into the hollow anchor rod 1 through an external pump body and discharged into the hole from multiple casting holes 102.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0039] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A support anchor structure for an underground coal mine, characterized in that: include: A hollow anchor rod (1), wherein a thread groove (101) is provided on the outer surface of the hollow anchor rod (1); A plugging assembly (2) is movably arranged at one end outside the hollow anchor rod (1); A plurality of reinforcement components (3) are movably mounted on the outside of the hollow anchor rod (1), wherein the reinforcement components (3) include a conical cover (301) movably mounted on the outside of the hollow anchor rod (1), a plurality of positioning strips (303) are fixedly mounted at equal angles on the outer surface of the conical cover (301), and a conical block (306) is movably mounted on the outside of the conical cover (301) on the outside of the hollow anchor rod (1).

2. The coal mine underground support anchor structure according to claim 1, characterized in that: The outer surface of the hollow anchor rod (1) is provided with a plurality of casting holes (102) at equal intervals above the conical cover (301), and a hollow block (103) is fixedly mounted on one end surface of the hollow anchor rod (1).

3. The coal mine underground support anchor structure according to claim 1, characterized in that: The inner surface of the conical block (306) is fixedly provided with a thread (307), and the conical block (306) is screwed and connected to the thread groove (101) via the thread (307).

4. The underground coal mine support anchor structure according to claim 1, characterized in that: The blocking component (2) comprises: A backing plate (201) is movably sleeved on one end of the outer surface of the hollow anchor rod (1); A conical rubber sleeve (203) is movably mounted on the outer surface of the hollow anchor rod (1) and located on one side of the pad (201).

5. The underground coal mine support anchor structure according to claim 4, characterized in that: The outer surface of the hollow anchor rod (1) is located on the other side of the backing plate (201) and is movably sleeved with a nut (202), and the nut (202) is screwed and connected to the thread groove (101).

6. The underground coal mine support anchor structure according to claim 1, characterized in that: A plurality of fixing plates (305) are fixedly installed at equal intervals on the inner surface of the conical cover (301), and a plurality of guide plates (304) are fixedly installed at equal intervals on one end surface of the conical cover (301).

7. The underground coal mine support anchor structure according to claim 6, characterized in that: The outer surface of the conical cover (301) is provided with a plurality of expansion grooves (302) at equal angles, the outer surface of the conical block (306) is movably fitted with the inner surface of the conical cover (301), and the lower end of the conical block (306) is movably fitted with the upper end of the fixing plate (305).

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