Self-consolidation temporary support anchor rod device for three-soft coal seam

Abstract

The utility model discloses a kind of self-consolidation temporary support anchor rod devices for three soft coal seams, it is related to the technical field of support anchor rod for three soft coal seams, including anchor rod main body, outer sleeve and support assembly, the outside of anchor rod main body is provided with external thread, and the upper and lower ends of anchor rod main body are fixed with connecting assembly, the outside of anchor rod main body is equipped with outer sleeve, and the upper side of outer sleeve is integrally fixed with positioning pipe, the outside of outer sleeve is installed with support assembly. The self-consolidation temporary support anchor rod device for three soft coal seams, the setting of connecting assembly is convenient for the mutual splicing of several anchor rod main bodies, the support rod of support assembly can be unfolded under the action of rotary shaft, limiting plate can limit its optimal support angle, and then the contact area with surrounding rock can be enlarged, to avoid the local stress concentration caused by traditional anchor rod point support, while multiple support rods are evenly distributed in annular array shape, can disperse surrounding rock load, improve the global coverage of temporary support.

Description

Technical Field

[0001] This utility model relates to the technical field of support anchor bolts for soft coal seams, specifically a self-consolidating temporary support anchor bolt device for soft coal seams. Background Technology

[0002] Three-soft coal seams refer to coal seams with soft roof, soft floor, and soft coal quality. During their mining, support anchors are required. Support anchors are a reinforcement support method that enhances structural stability and load-bearing capacity by driving anchors into the rock and soil mass. They are widely used in mining, tunnel, and foundation pit engineering projects. By driving anchors into the rock and soil mass, unstable rock and soil masses are connected to stable strata, thereby limiting the deformation and displacement of the rock and soil mass and maintaining the stability of the engineering structure.

[0003] For example, the utility model application with application number 202423028706.7 discloses a mine fault support anchor. Similar support anchors currently have the following shortcomings: although they can provide support, the support anchors generally use point support, which leads to local stress concentration. This makes it difficult to disperse the surrounding rock load and improve the overall coverage of temporary support, resulting in poor support effect. Utility Model Content

[0004] The purpose of this invention is to provide a self-consolidating temporary support anchor bolt device for soft coal seams, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-consolidating temporary support anchor bolt device for soft coal seams, comprising an anchor bolt body, an outer sleeve, and a support assembly. The outer side of the anchor bolt body is provided with external threads, and connecting assemblies are fixed at both the upper and lower ends of the anchor bolt body. The outer sleeve is fitted over the anchor bolt body, and a positioning tube is integrally fixed on the upper side of the outer sleeve. The support assembly is installed on the outside of the outer sleeve, and the support assembly includes a bearing seat, a rotating shaft, a support rod, and a limiting plate. The bearing seat is fixedly connected to the outer sleeve, and the support rod is rotatably installed between the bearing seats through the rotating shaft. A limiting plate is fixed on the upper side of the bearing seat.

[0006] Preferably, the connecting assembly includes an upper connecting pipe and a docking groove, the upper connecting pipe is integrally fixed to the upper end of the anchor rod body, and the docking groove is provided inside the upper connecting pipe.

[0007] Preferably, the connecting assembly further includes a lower connecting pipe and a positioning groove. The lower connecting pipe is integrally fixed to the lower end of the anchor rod body, and positioning grooves are provided in the middle of both the lower connecting pipe and the upper connecting pipe.

[0008] Preferably, a positioning pin extends through the interior of the positioning groove, and the positioning pin has a square cross-section.

[0009] Preferably, the anchor rod body and the lower connecting pipe are both hollow structures, and the dimensions of the lower connecting pipe match those of the docking groove.

[0010] Preferably, the anchor bolt body, outer sleeve, and support assembly are all fitted with an outer protective tube, and locking components are provided on both upper sides of the outer protective tube and the positioning tube.

[0011] Preferably, the locking assembly includes a threaded cylinder and a locking block. The threaded cylinder is embedded in the upper sides of the outer protective tube and the positioning tube, and the locking block is screwed into the internal thread of the threaded cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This utility model is equipped with a connecting component. The anchor rod body and the connecting component adopt a hollow structure, which can be directly used as a grouting channel, allowing the grout to penetrate the soft surrounding rock to form a reinforcement ring. The connecting component facilitates the splicing of several anchor rod bodies. The mating grooves of the lower connecting pipe and the upper connecting pipe of the connecting component are matched with the square positioning pins at the positioning grooves. This not only enables the precise splicing of multiple anchor rod sections to adapt to different support depths, but also prevents rotation at the splice, thereby helping to ensure the overall load-bearing stability.

[0013] This utility model is equipped with a support component. The outer sleeve can be fitted and installed on the outside of the anchor bolt body and locked and fixed by the locking component at the positioning tube. The support rod of the support component can be unfolded under the action of the rotation shaft. The limiting plate can limit its optimal support angle, thereby expanding the contact area with the surrounding rock and avoiding the local stress concentration caused by the traditional anchor bolt point support. At the same time, multiple support rods are evenly distributed in a ring array, which can disperse the surrounding rock load and improve the full coverage of temporary support. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a self-consolidating temporary support anchor bolt device for three soft coal seams according to the present invention; Figure 2 This is a schematic diagram of the main structure of the anchor bolt of the self-consolidating temporary support anchor bolt device for three soft coal seams according to this utility model; Figure 3 This is a schematic diagram of the retracted structure of the support component of a self-consolidating temporary support anchor bolt device for three soft coal seams according to this utility model; Figure 4 This is a schematic diagram of the opening structure of the support component of a self-consolidating temporary support anchor bolt device for soft coal seams according to this utility model.

[0015] In the diagram: 1. Anchor bolt body; 2. External thread; 3. Connecting assembly; 301. Upper connecting pipe; 302. Butt groove; 303. Lower connecting pipe; 304. Positioning groove; 4. Positioning pin; 5. Outer sleeve; 6. Positioning pipe; 7. Support assembly; 701. Shaft seat; 702. Rotary shaft; 703. Support rod; 704. Limiting plate; 8. Outer protective tube; 9. Locking assembly; 901. Threaded cylinder; 902. Locking block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1-2 As shown, a self-consolidating temporary support anchor bolt device for soft coal seams includes an anchor bolt body 1, an outer sleeve 5, and a support assembly 7. The outer side of the anchor bolt body 1 is provided with external threads 2, and connecting assemblies 3 are fixed at both the upper and lower ends of the anchor bolt body 1. The connecting assembly 3 includes an upper connecting pipe 301 and a mating groove 302. The upper connecting pipe 301 is integrally fixed to the upper end of the anchor bolt body 1, and the mating groove 302 is opened inside the upper connecting pipe 301. The connecting assembly 3 also includes a lower connecting pipe 303 and a positioning groove 304. The lower connecting pipe 303 is integrally fixed to the lower end of the anchor bolt body 1, and positioning grooves 304 are opened in the middle of both the lower connecting pipe 303 and the upper connecting pipe 301. The interior of the positioning groove 304 is through-hole. The anchor rod body 1 and the lower connecting pipe 303 are hollow structures, and the dimensions of the lower connecting pipe 303 and the docking groove 302 are matched. The anchor rod body 1 and the connecting component 3 adopt a hollow structure, which can be directly used as a grouting channel, so that the grout can penetrate the soft surrounding rock to form a reinforcement ring. The setting of the connecting component 3 facilitates the splicing of several anchor rod bodies 1. The lower connecting pipe 303 of the connecting component 3 cooperates with the docking groove 302 of the upper connecting pipe 301, and with the square positioning pin 4 at the positioning groove 304, it can not only achieve precise splicing of multiple anchor rods to adapt to different support depths, but also prevent rotation at the splice, thus helping to ensure the overall load-bearing stability.

[0018] like Figure 1 , Figures 3-4As shown, an outer sleeve 5 is fitted around the anchor bolt body 1, and a positioning tube 6 is integrally fixed to the upper side of the outer sleeve 5. A support assembly 7 is installed on the outside of the outer sleeve 5, and the support assembly 7 includes a shaft seat 701, a rotating shaft 702, a support rod 703, and a limiting plate 704. The shaft seat 701 is fixedly connected to the outer sleeve 5, and the support rod 703 is rotatably installed between the shaft seats 701 through the rotating shaft 702. The limiting plate 704 is fixed to the upper side of the shaft seat 701. An outer protective tube 8 is fitted around the anchor bolt body 1, the outer sleeve 5, and the support assembly 7, and locking assemblies 9 are provided on both sides of the upper side of the outer protective tube 8 and the positioning tube 6. The locking assembly 9 includes a threaded cylinder 901 and a locking block 902. The threaded cylinder 901 is embedded in the upper sides of the outer protective tube 8 and the positioning tube 6, and the internal thread of the threaded cylinder 901 is... The threaded connection includes a locking block 902; the outer sleeve 5 can be fitted onto the outside of the anchor bolt body 1 and locked in place by the locking component 9 at the positioning tube 6; the support rod 703 of the support component 7 can be unfolded under the action of the rotating shaft 702; the limiting plate 704 can limit its optimal support angle, thereby expanding the contact area with the surrounding rock and avoiding local stress concentration caused by traditional anchor bolt point support; at the same time, multiple support rods 703 are evenly distributed in a ring array, which can disperse the surrounding rock load and improve the full coverage of temporary support; the outermost outer protective tube 8 can be fitted onto the overall structure, thereby preventing the crushed coal and gangue in the soft coal seam from abrading the anchor bolt body 1 and the external thread 2 during installation and support; it can also ensure that the support component 7 is in a retracted state during installation and support, adapting to the needs of rapid underground tunneling.

[0019] In summary, as Figures 1-4 As shown, the self-consolidating temporary support anchor bolt device for the three soft coal seams can be used by first assembling the anchor bolt body 1 as needed. During assembly, the lower connecting pipe 303 of the connecting component 3 and the docking groove 302 of the upper connecting pipe 301 are matched with the square positioning pin 4 at the positioning groove 304. This not only enables precise splicing of multiple anchor bolt sections to adapt to different support depths, but also prevents rotation at the splice, thus helping to ensure the overall load-bearing stability. Then, the outer sleeve 5 can be fitted and installed on the outside of the anchor bolt body 1 and locked and fixed by the locking component 9 at the positioning pipe 6. Finally, the outer protective pipe 8 is fitted from top to bottom on the outside, and the locking blocks 902 in the threaded cylinders 901 on both sides above the outer protective pipe 8 are rotated to fix it. During installation and support in the soft coal seam, the drill bit is installed below the lowest anchor bolt body 1. At this time, the outermost outer protective pipe 8 can be fitted onto the overall structure, thereby preventing the crushed coal and gangue in the soft coal seam from abrading the anchor bolt body 1 and the external thread 2. It also ensures that the support component 7 is in a retracted state during installation and support, adapting to the needs of rapid underground tunneling. After tunneling is completed, the locking component 9 of the outer protective pipe 8 can be loosened and the outer protective pipe 8 can be pulled upwards. A torsion spring is provided on the outside of the rotary shaft 702. At this time, the support rod 703 of the support component 7 can be supported by the rotary shaft 702. Under the action of the anchor bolt, the limiting plate 704 can limit the optimal support angle, thereby expanding the contact area with the surrounding rock and avoiding the local stress concentration caused by the traditional anchor bolt point support. At the same time, multiple support rods 703 are evenly distributed in a ring array, which can disperse the surrounding rock load and improve the overall coverage of the temporary support. Finally, after removing the outer protective pipe 8, the support plate can be installed. In addition, when in use, the anchor bolt body 1 and the connecting component 3 adopt a hollow structure, which can be directly used as a grouting channel, so that the grout can penetrate the soft surrounding rock to form a reinforcement ring. This completes the use process of the self-consolidating temporary support anchor bolt device for the three soft coal seams.

[0020] 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.

Claims

1. A self-consolidating temporary support anchor bolt device for soft coal seams, comprising an anchor bolt body (1), an outer sleeve (5), and a support assembly (7), characterized in that, The anchor body (1) is provided with an external thread (2) on the outside, and the upper and lower ends of the anchor body (1) are fixed with connecting components (3). The anchor body (1) is fitted with an outer sleeve (5), and a positioning tube (6) is integrally fixed on the upper side of the outer sleeve (5). A support component (7) is installed on the outside of the outer sleeve (5), and the support component (7) includes a bearing seat (701), a rotating shaft (702), a support rod (703), and a limiting plate (704). The bearing seat (701) is fixedly connected to the outer sleeve (5), and the support rod (703) is rotatably installed between the bearing seats (701) through the rotating shaft (702). The limiting plate (704) is fixed on the upper side of the bearing seat (701).

2. The self-consolidating temporary support anchor bolt device for three-soft coal seams according to claim 1, characterized in that, The connecting component (3) includes an upper connecting pipe (301) and a docking groove (302). The upper end of the anchor rod body (1) is integrally fixed with the upper connecting pipe (301), and the upper connecting pipe (301) has a docking groove (302) inside.

3. The self-consolidating temporary support anchor bolt device for soft coal seams according to claim 2, characterized in that, The connecting component (3) also includes a lower connecting pipe (303) and a positioning groove (304). The lower end of the anchor rod body (1) is integrally fixed with the lower connecting pipe (303), and the middle part of the lower connecting pipe (303) and the upper connecting pipe (301) are both provided with positioning grooves (304).

4. The self-consolidating temporary support anchor bolt device for soft coal seams according to claim 3, characterized in that, The positioning groove (304) has a positioning pin (4) running through its interior, and the positioning pin (4) has a square cross-section.

5. A self-consolidating temporary support anchor bolt device for soft coal seams according to claim 3, characterized in that, The anchor rod body (1) and the lower connecting pipe (303) are both hollow structures, and the dimensions of the lower connecting pipe (303) and the docking groove (302) are matched.

6. The self-consolidating temporary support anchor bolt device for soft coal seams according to claim 1, characterized in that, The anchor body (1), outer sleeve (5), and support component (7) are covered with an outer protective tube (8), and locking components (9) are provided on both sides of the upper side of the outer protective tube (8) and the positioning tube (6).

7. A self-consolidating temporary support anchor bolt device for soft coal seams according to claim 6, characterized in that, The locking assembly (9) includes a threaded cylinder (901) and a locking block (902). The threaded cylinder (901) is embedded in the upper sides of the outer protective tube (8) and the positioning tube (6), and the locking block (902) is screwed into the internal thread of the threaded cylinder (901).

Images