Coal pillar reinforcing device based on energy gathering control

Abstract

The utility model belongs to the technical field of coal pillar reinforcing, and particularly relates to a coal pillar reinforcing device based on energy gathering control, which comprises a main anchor rod, an auxiliary anchor rod and a base, the reinforcing seat is spirally installed at the bottom of the auxiliary anchor rod through an adapter shaft above the reinforcing seat, ejector rods are distributed above the reinforcing seat in the circumferential direction and used for abutting against the base to enable the base to form energy-gathered reinforcement on the surface layer of the coal pillar, a side link is arranged above the reinforcing seat, a rotating block connected with a coal seam is arranged above the side link, and the rotating block is connected with the coal seam. And a clamping groove which is spirally connected with the outer side of the bottom of the side link is formed in the upper end of the adapter shaft. According to the utility model, the looseness of the inner structure of the coal pillar can be effectively delayed, the maintenance and reinforcement treatment is facilitated, and the multi-time paste injection operation can be carried out during the reuse period so as to form an energy-gathered reinforcement effect on the inner structure of the coal pillar.

Description

Technical Field

[0001] This utility model belongs to the field of coal pillar reinforcement technology, and in particular relates to a coal pillar reinforcement device based on energy focusing control. Background Technology

[0002] A coal pillar is a portion of the ore body that is temporarily or permanently excluded from mining during underground coal mining for the sake of convenience and safety. It is a coal body deliberately preserved during the coal mining process to ensure coal production and safety.

[0003] Currently, the reinforcement of coal pillars mostly adopts the anchor bolt mechanism to reinforce and support the surrounding rock inside and outside the coal pillar, thereby reducing the deformation of the coal pillar;

[0004] However, in the actual application of anchor bolts, it has been found that the coal seam will generate a certain amount of vibration during mining, which will cause the internal structure of the coal seam to loosen, resulting in gaps between the coal seam and the anchor bolt. This not only affects the reinforcement effect, but also makes it impossible to detect and repair the loosened area in time.

[0005] To address the aforementioned issues, this application proposes a coal pillar reinforcement device based on energy focusing control. Utility Model Content

[0006] The purpose of this invention is to provide a coal pillar reinforcement device based on energy-concentrating control, which solves the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model is a coal pillar reinforcement device based on energy-concentrating control, including a main anchor rod, a secondary anchor rod, and a base; a reinforcing seat, which is spirally installed at the bottom of the secondary anchor rod via an upper adapter shaft; top rods are distributed circumferentially above the reinforcing seat to tighten the base and form energy-concentrating reinforcement on the surface of the coal pillar; a connecting rod is provided above the reinforcing seat, and a rotating block connected to the coal seam is provided above the connecting rod to apply support force to the reinforcing seat and the adapter shaft; a groove is opened inside the upper end of the adapter shaft to spirally connect to the outer side of the bottom of the connecting rod; an injection hole is opened inside the secondary anchor rod and extends through the top of the main anchor rod, used to install the connecting rod and to provide a grout injection channel during reinforcement operations; a protruding locking post is provided at the bottom of the connecting rod for connecting to an external active rotating shaft; the rotation of the connecting rod is used to drive the rotating block to rotate and separate from the coal seam.

[0009] Furthermore, a ring frame is provided on the outer side of the reinforcing seat near the upper end, and a pad for pressing against the ring frame is provided on the outer side of the upper end of the reinforcing seat.

[0010] Furthermore, the ring frame and the reinforcing seat are rotatably connected, so that the top rod can still be aligned with the positioning hole under the base when the reinforcing seat rotates.

[0011] Furthermore, the slot has a double-hole structure, with the upper layer being an internal thread structure and the lower layer being an enlarged smooth hole structure.

[0012] Furthermore, a rubber pad is provided near the upper end of the connecting rod to seal the gap between the connecting rod and the filling hole.

[0013] Furthermore, the upper end of the secondary anchor rod is provided with a sealing ring to seal the gap between the secondary anchor rod and the main anchor rod.

[0014] Furthermore, the rotation of the rotating block is used to cut the coal seam on the side to facilitate separation for paste injection, thereby forming a function that allows for multiple paste injections.

[0015] This utility model has the following beneficial effects:

[0016] This utility model, through the combination of the reinforcing seat, connecting rod, and auxiliary anchor rod, can transfer the supporting force after the top rotating block is connected to the top rod during support operations, thereby forming an energy-concentrating reinforcement on the base, which strengthens the surface structure of the coal seam, thus preventing the loosening of the coal seam directly after internal loosening, delaying the aggravation of loosening, and facilitating maintenance by the staff.

[0017] This utility model, through the combination of a reinforcing seat and a connecting rod, allows the reinforcing seat to be removed during maintenance work, enabling the locking column to connect with the active rotating shaft. This causes the rotating block to rotate and detach from the coal seam and grouting structure, allowing for direct grout injection through the injection hole. Under air pressure, the grout is dispersed into the gaps within the coal seam, re-energizing to reinforce the internal structure of the coal seam. This grout injection method can be performed multiple times, achieving stable support for the coal pillar and improving the safety of mine operations.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall appearance and combined structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0022] Figure 3This is a schematic diagram of the structure of the reinforced part connected to the secondary anchor rod in this utility model.

[0023] Figure 4 This is a schematic diagram of the connection structure between the connecting rod, the secondary anchor rod, and the main anchor rod of this utility model;

[0024] The attached diagram lists the components represented by each number as follows:

[0025] In the diagram: 1. Main anchor bolt; 2. Secondary anchor bolt; 3. Base; 4. Reinforcing seat; 5. Ring frame; 6. Top rod; 7. Connecting rod; 8. Adapter shaft; 9. Filling hole; 10. Gasket; 11. Positioning hole; 12. Locking post; 13. Locking groove; 14. Rotating block; 15. Rubber gasket; 16. Sealing ring. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Please see Figure 1-4 As shown, this utility model is a coal pillar reinforcement device based on energy focusing control, including a main anchor 1, a secondary anchor 2, and a base 3;

[0029] The reinforcing seat 4 is spirally installed at the bottom of the auxiliary anchor rod 2 via the upper adapter shaft 8. The upper reinforcing seat 4 has circumferentially distributed top rods 6, which are used to tighten the base 3 to form an energy-concentrating reinforcement on the surface of the coal pillar. The reinforcing seat 4 is provided with a connecting rod 7 above it, and a rotating block 14 connected to the coal seam is provided above the connecting rod 7 to apply support force to the reinforcing seat 4 and the adapter shaft 8. The upper end of the adapter shaft 8 has a groove 13 that is spirally connected to the outer side of the bottom of the connecting rod 7.

[0030] The injection hole 9 is located inside the secondary anchor 2 and extends through the top of the main anchor 1. It is used to install the connecting rod 7 and to provide an injection channel during reinforcement operations. The bottom of the connecting rod 7 has a protruding locking post 12 for connecting to the external active rotating shaft. The rotation of the connecting rod 7 is used to drive the rotating block 14 to rotate and separate from the coal seam.

[0031] This embodiment provides a support structure for energy-concentrating and reinforcing coal pillars. The rotating block 14 is connected to the coal seam and the counter-tension support force is directly transmitted to the top rod 6 through the connecting rod 7. This supports the base 3 to form an energy-concentrating support for the surface coal pillar. In addition, the rotating block 14 can be removed by grinding and separating the coal seam. The rotating block 14 and the connecting rod 7 can then be removed and injected with paste through the injection hole 9. The injection hole 9 is then sealed by the rotating block 14 to form a cycle. This allows for multiple injections of paste to reinforce the loose structure inside the coal pillar.

[0032] Among them, the reinforcing seat 4 is a stepped shaft structure with a smaller upper part and a larger lower part. A ring frame 5 is provided on the outer side of the upper shaft body, and a pad 10 for pressing against the ring frame 5 is provided on the outer side of the upper end of the reinforcing seat 4.

[0033] The ring frame 5 and the reinforcing seat 4 are rotatably connected, which allows the top rod 6 to be moved at any time to keep it aligned with the positioning hole 11 below the base 3 when the reinforcing seat 4 rotates, so as to tighten and reinforce it.

[0034] Among them, the slot 13 has a double-layer hole structure. The upper layer is an internal thread structure, which is used to connect with the thread on the outer side of the bottom of the connecting rod 7, while the lower layer is an enlarged smooth hole structure to prevent affecting the helical connection between the upper spiral groove and the external thread of the connecting rod 7.

[0035] Among them, a rubber pad 15 is provided near the upper end of the connecting rod 7 to seal the gap between the connecting rod 7 and the injection hole 9, so as to prevent the slag in the coal pillar from entering the interior and causing jamming.

[0036] The upper end of the secondary anchor rod 2 is provided with a sealing ring 16, which is used to seal the gap between the secondary anchor rod 2 and the main anchor rod 1 to prevent backflow during grout injection.

[0037] The rotation of the rotating block 14 is used to cut the coal seam on the side to facilitate separation for paste injection, thereby forming a function that allows for multiple paste injections.

[0038] It is understandable that this utility model can effectively delay the loosening of the internal structure of the coal pillar, facilitate maintenance and reinforcement, and allow for multiple injection operations during use to achieve an energy-concentrating reinforcement effect on the internal structure of the coal pillar.

[0039] A specific application of the operation process in this embodiment is as follows: After the main anchor 1 and the secondary anchor 2 are installed to the coal pillar, the connecting rod 7 is first inserted into the filling hole 9 and the adapter shaft 8 is screwed into the lower end of the secondary anchor 2. At this time, the rotating block 14 is exposed at the top of the main anchor 1 and connected to the coal seam. The top rod 6 is inserted into the positioning hole 11 under the drive of the reinforcing seat 4. In this way, the supporting force of the rotating block 14 can be transferred to the top rod 6, thereby forming a top force on the base 3 to further reinforce the coal pillar, so that the coal pillar can accumulate energy. This can prevent the gap from widening and aggravating when loosening, so as to buy time for maintenance and reinforcement. In addition, during the reinforcement operation. First, remove the reinforcing seat 4, then connect the active rotating shaft to the locking column 12, so that the connecting rod 7 drives the rotating block 14 to rotate and detach from the coal pillar. Then, inject paste directly through the injection hole 9, and under the subsequent pressure, the paste is dispersed in the gaps in the coal pillar to aggregate the internal structure of the coal pillar and form an energy-gathering effect. Finally, repeat the installation of the connecting rod 7 and the reinforcing seat 4 to restore normal support performance.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A coal pillar reinforcement device based on focused energy control, comprising a main anchor bolt (1), a secondary anchor bolt (2), and a base (3), characterized in that: The reinforcing seat (4) is spirally installed on the bottom of the auxiliary anchor rod (2) via the upper adapter shaft (8). The reinforcing seat (4) has top rods (6) distributed circumferentially above it, which are used to press the base (3) to form an energy-concentrating reinforcement on the surface of the coal pillar. The reinforcing seat (4) is provided with a connecting rod (7) above it, and a rotating block (14) connected to the coal seam is provided above the connecting rod (7) to apply support force to the reinforcing seat (4) and the adapter shaft (8). The upper end of the adapter shaft (8) has a slot (13) that is spirally connected to the outer side of the bottom of the connecting rod (7). The injection hole (9) is located inside the secondary anchor rod (2) and extends through the top of the main anchor rod (1). It is used to install the connecting rod (7) and to provide a grouting channel during reinforcement operations. The bottom of the connecting rod (7) is provided with a protruding locking post (12) for connecting to the external active rotating shaft. The rotation of the connecting rod (7) is used to drive the rotating block (14) to rotate and separate from the coal seam.

2. The coal pillar reinforcement device based on energy-focusing control according to claim 1, characterized in that: A ring frame (5) is provided on the outer side of the reinforcing seat (4) near the upper end, and a pad (10) is provided on the outer side of the upper end of the reinforcing seat (4) to press against the ring frame (5).

3. The coal pillar reinforcement device based on energy-focusing control according to claim 2, characterized in that: The ring frame (5) and the reinforcing seat (4) are rotatably connected so that the top rod (6) can still be aligned with the positioning hole (11) below the base (3) when the reinforcing seat (4) rotates.

4. The coal pillar reinforcement device based on energy-focusing control according to claim 1, characterized in that: The slot (13) has a double-hole structure, with the upper layer being an internal thread structure and the lower layer being an enlarged smooth hole structure.

5. The coal pillar reinforcement device based on energy-focusing control according to claim 1, characterized in that: A rubber pad (15) is provided near the upper end of the connecting rod (7) to seal the gap between the connecting rod (7) and the filling hole (9).

6. The coal pillar reinforcement device based on energy-focusing control according to claim 1, characterized in that: The upper end of the secondary anchor rod (2) is provided with a sealing ring (16) for sealing the gap between the secondary anchor rod (2) and the main anchor rod (1).

7. The coal pillar reinforcement device based on energy-focusing control according to claim 1, characterized in that: The rotation of the rotating block (14) is used to cut the coal seam on the side to facilitate separation for paste injection, thereby forming a function that can be injected multiple times.

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