Hollow grouting mine anchor cable special grouting plug

Abstract

The utility model discloses a hollow grouting mine anchor cable special grout stopper, including fixed bolt seat, the fixed bolt seat outside is equipped with sealing structure, is used for realizing the sealing of different aperture drilling, the fixed bolt seat below is equipped with locking structure, is used for locking fixed bolt seat. The utility model belongs to the technical field of mine equipment, and specifically refers to a kind of hollow grouting mine anchor cable special grout stopper, effectively solve the problem that grout stopper grout effect is poor, installation and disassembly are inconvenient, poor adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of mining equipment technology, specifically referring to a special grout-stopping plug for hollow grouting mining anchor cables. Background Technology

[0002] Rock bolt and cable support has become one of the main support methods for underground coal mine roadways. Underground coal mine roadways commonly present complex geological conditions such as weak surrounding rock, fault fracture zones, and high stress with large deformations, posing significant challenges to roadway control. Using ordinary rock bolts for support is relatively ineffective. However, using hollow grouting rock bolts and cables for full anchoring support can reinforce fractured surrounding rock, integrating anchoring and grouting. This alters the loose structure of the surrounding rock, improves adhesion and internal friction angle, seals fissures, and prevents water erosion, significantly increasing rock mass strength. Grouting reinforcement provides a reliable foundation for the rock bolts and cables, allowing them to effectively anchor the soft, fractured surrounding rock.

[0003] To improve the anchoring effect, the grouting pressure is often increased by 5 to 10 MPa. This method can not only fill the anchor hole, but also allow the grout to penetrate into the fractures more widely under the grouting pressure in areas with developed fractures. This makes it more effective in improving the surrounding rock structure and reinforcing fractured and broken areas.

[0004] When grouting and reinforcing rock masses, grout stoppers need to be installed to prevent grout from overflowing from the grouting holes and causing pressure loss. However, existing anchor cable-specific grout stoppers are integrated and fitted between the anchor cable and the borehole, resulting in poor grout stopping effect and easy grout leakage, which affects grouting quality and support effect. Moreover, they have poor adaptability and cannot meet the construction requirements of different hole diameters and different grouting pressures. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model proposes a special grout-stopping plug for hollow grouting mine anchor cables, which effectively solves the problems of poor grout-stopping effect, inconvenient installation and disassembly, and poor adaptability of grout-stopping plugs.

[0006] The technical solution adopted by this utility model is as follows: The utility model proposes a special grout stopper for hollow grouting mine anchor cables, including a fixing bolt seat, a sealing structure on the outside of the fixing bolt seat for sealing boreholes of different diameters, and a locking structure below the fixing bolt seat for locking the fixing bolt seat.

[0007] Preferably, the sealing structure includes a limiting groove recessed on the outside of the fixing bolt seat, an airbag is provided on the outside of the limiting groove, an expansion cavity is provided inside the airbag, an air injection valve is fixedly connected above the airbag and communicates with the expansion cavity, and a sealing ring is provided on the outside of the airbag.

[0008] To achieve a better locking effect, the locking structure includes a thrust washer that is pressed down below the fixing bolt seat, and a locking nut is pressed down below the thrust washer.

[0009] To achieve a seal more quickly, the sealing ring is made of highly elastic rubber sealing material.

[0010] Furthermore, the airbag is made of high-strength wear-resistant rubber material, and the fixing bolt seat and locking nut are made of high-carbon steel metal material.

[0011] To achieve a sealing effect, the airbag is placed between the fixing bolt seat and the sealing ring. The airbag expands and compresses to achieve a seal between the airbag and the fixing bolt seat and between the airbag and the sealing ring.

[0012] The beneficial effects of this utility model using the above structure are as follows: The hollow grouting anchor cable special grout stopper proposed in this solution expands the airbag by injecting gas pressure into the expansion chamber inside the airbag, causing the sealing ring to fit tightly against the borehole wall, thereby improving the grout stopping effect; the high-strength wear-resistant material of the airbag improves the service life and overall strength of the grout stopper, and can adapt to different construction environments and pressure requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a hollow grouting anchor cable special for mining proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the hollow grouting anchor cable special grout stopper proposed in this utility model from another perspective.

[0015] Figure 3 This is a cross-sectional structural diagram of a hollow grouting anchor cable special for mining, as proposed in this utility model.

[0016] Figure 4 This is another cross-sectional structural schematic diagram of a hollow grouting anchor cable special for mining proposed in this utility model.

[0017] The components are: 1. Fixed bolt seat; 2. Sealing structure; 3. Locking structure; 5. Limiting groove; 6. Airbag; 7. Expansion chamber; 8. Injection valve; 9. Sealing ring; 10. Thrust washer; 11. Locking nut.

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1 and Figure 3 As shown, the present invention proposes a special grout-stopping plug for hollow grouting mine anchor cables, including a fixing bolt seat 1, a sealing structure 2 on the outside of the fixing bolt seat 1 for sealing boreholes of different diameters, and a locking structure 3 below the fixing bolt seat 1 for locking the fixing bolt seat 1.

[0021] like Figure 1 , Figure 3 and Figure 4 As shown, the sealing structure 2 includes a limiting groove 5 recessed on the outside of the fixing bolt seat 1. An airbag 6 is wrapped around the outside of the limiting groove 5. The airbag 6 is made of high-strength wear-resistant rubber material. An expansion chamber 7 is opened inside the airbag 6. An air injection valve 8 is fixedly connected to the top of the airbag 6 and communicates with the expansion chamber 7. A sealing ring 9 is wrapped around the outside of the airbag 6. The sealing ring 9 is made of high-elasticity rubber sealing material. The airbag 6 is placed between the fixing bolt seat 1 and the sealing ring 9. The airbag 6 expands and squeezes to achieve a seal between the airbag 6 and the fixing bolt seat 1 and between the airbag 6 and the sealing ring 9.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the locking structure 3 includes a thrust washer 10 pressed down below the fixing bolt seat 1, and a locking nut 11 pressed down below the thrust washer 10. The fixing bolt seat 1 and the locking nut 11 are made of high carbon steel.

[0023] In practical use, first screw the locking nut 11 onto the top of the mining anchor rod, then place the thrust washer 10 on top of the mining anchor rod and onto the locking nut 11. Then, screw the fixing bolt seat 1 onto the top of the mining anchor rod, pressing it against the thrust washer 10. Then, screw the locking nut 11 upwards, thereby pressing the thrust washer 10 against the fixing bolt seat 1 to achieve locking and fixing. Then, insert the mining anchor into the borehole. At this time, the outer sealing ring 9 of the airbag 6 is inserted into the borehole along with the mining anchor. Then, use an air pump and air valve connected to the air injection valve 8 to pump air into the expansion chamber 7 inside the airbag 6 through the air injection valve 8. At this time, the expansion chamber 7 is inflated and expanded. The expansion of the airbag 6 pushes the sealing ring 9 outward to press against the inner wall of the borehole, thereby achieving sealing and improving the practicality of various hole diameters. The above is the entire process of using the hollow grouting mining anchor special grout stopper.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A special grout-stopping plug for hollow grouting mine anchor cables, comprising a fixing bolt seat (1), characterized in that: It also includes a sealing structure (2) provided on the outside of the fixing bolt seat (1) for sealing holes of different diameters, and a locking structure (3) provided below the fixing bolt seat (1) for locking the fixing bolt seat (1). The sealing structure (2) includes a limiting groove (5) recessed on the outside of the fixing bolt seat (1), an airbag (6) is provided on the outside of the limiting groove (5), an expansion chamber (7) is provided inside the airbag (6), an air injection valve (8) is fixedly connected above the airbag (6) and communicates with the expansion chamber (7), and a sealing ring (9) is provided on the outside of the airbag (6).

2. The grout-stopping plug for hollow grouting mine anchor cables according to claim 1, characterized in that: The locking structure (3) includes a thrust washer (10) pressed under the fixed bolt seat (1), and a locking nut (11) pressed under the thrust washer (10).

3. The grout-stopping plug for hollow grouting mine anchor cables according to claim 1, characterized in that: The sealing ring (9) is made of high-elasticity rubber sealing material.

4. A special grout-stopping plug for hollow grouting mine anchor cables according to claim 1, characterized in that: The airbag (6) is made of high-strength wear-resistant rubber material, and the fixing bolt seat (1) and locking nut (11) are made of high-carbon steel metal material.

5. A special grout-stopping plug for hollow grouting mine anchor cables according to claim 4, characterized in that: The airbag (6) is positioned between the fixing bolt seat (1) and the sealing ring (9). The airbag (6) expands and compresses to achieve a seal between the airbag (6) and the fixing bolt seat (1) and between the airbag (6) and the sealing ring (9).

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