Roof support for coal-pillar-free roof-cutting roadway-forming dynamic pressure affected zone of coal mine

Abstract

The utility model relates to the technical field of roof supports, and discloses a coal mine coal-pillar-free roof-cutting roadway-forming dynamic pressure affected zone roof support which comprises a flexible roof, a plurality of abutting rods and a supporting assembly, the abutting rods are arranged on the inner side of the roof, each abutting rod is of an arc-shaped structure, and the abutting rods are connected through a plurality of connecting rods in a penetrating mode. Adjusting assemblies capable of adjusting the camber of the abutting rods and the camber of the top plate are arranged between the ends of the abutting rods and comprise threaded rods arranged on the inner sides of the ends of the abutting rods, the threaded rods are arranged in the opposite directions of threads of the threaded rods and provided with threaded cylinders in a threaded fit mode, and reinforcing assemblies capable of assisting the abutting rods in improving the supporting strength are arranged on the inner sides of the abutting rods. The end of the abutting rod is connected with the supporting assembly and matched with the supporting assembly to form a channel, and a protection assembly is arranged outside the channel. Compared with the prior art, the device has the advantages that stable supporting is facilitated, the top plate is prevented from sinking, and adjustment is facilitated according to a roadway.

Description

Technical Field

[0001] This utility model relates to the field of roof support technology, specifically to a roof support for the dynamic pressure-affected zone of coal mine roof cutting and roadway formation without coal pillars. Background Technology

[0002] In coal mine production, after the coal seam is mined out, the pillarless method is often used to ensure the continuity and safety of mine operations. This involves leaving sufficient width between the strong shaft walls to maintain and support the overlying strata, preventing them from collapsing and causing safety hazards. However, the pillarless method also has some problems during construction. For example, it can easily lead to roof subsidence, affecting production safety; in addition, the supports are mostly fixed and not easy to adjust. Utility Model Content

[0003] The technical problem this invention aims to solve is that roof subsidence affects production safety, and the support structure is not easily adjustable according to the roadway.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a roof support for the dynamic pressure influence zone of coal mine pillarless roof cutting and roadway formation, including a flexible roof, a plurality of abutment rods and a support assembly disposed on the inner side of the roof, wherein the abutment rods are arc-shaped structures, and the abutment rods are connected through a plurality of connecting rods. An adjustment assembly is provided between the ends of the abutment rods to adjust the abutment rods and the arch of the roof. The adjustment assembly includes threaded rods disposed on the inner side of the ends of the abutment rods, and a threaded cylinder is provided with the threaded rods arranged in the opposite direction and through threaded engagement. A reinforcing assembly is provided on the inner side of the abutment rods to assist the abutment rods in improving the support strength. The ends of the abutment rods are connected to the support assembly and cooperate with the support assembly to form a channel, and a protective assembly is provided outside the channel.

[0005] Furthermore, the outer wall of the threaded cylinder is provided with anti-slip features.

[0006] Furthermore, the reinforcing component includes a connecting cylinder rotatably disposed in the middle of the threaded cylinder, and telescopic rods that are positioned by locking bolts are respectively hinged on both sides of the abutment rod, with the other end of the telescopic rods being hinged to the connecting cylinder.

[0007] Furthermore, the support assembly includes a base rod connected to the ground, a first pull rope between the end of the base rod and the end of the abutment rod, a first extension rod at the bottom end of the middle connecting cylinder, a second extension rod extending upward from the base rod, and a second pull rope between the second extension rod and the first extension rod.

[0008] Furthermore, the protective component includes a protective netting covering the outside of the channel.

[0009] The advantages of this utility model compared with the prior art are as follows:

[0010] 1. By adjusting the settings of the components, the arch can be adjusted by connecting the top plate to the abutment rod, making it suitable for tunnels of different widths and improving its practicality;

[0011] 2. By strengthening the component settings, it is easier to provide support for the inner side of the top plate, which facilitates the distribution of pressure on the top plate and improves the stability of the support for the top plate;

[0012] 3. The installation of external protective components in the passageway facilitates the protection of the passageway, preventing falling stones and other objects from causing personal injury and improving the safety of the passageway. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a roof support for the dynamic pressure-affected zone of a coal mine without coal pillars during roof cutting and roadway construction, according to this utility model.

[0014] Figure 2 This is a schematic diagram of the frame structure of a roof support for the dynamic pressure-affected zone of coal mine roof cutting and roadway formation without coal pillars, according to this utility model.

[0015] Figure 3 This is a schematic diagram of a half-section structure of a roof support for a coal mine without coal pillars in the dynamic pressure influence zone of roof cutting and roadway construction.

[0016] Figure 4 This is a cross-sectional structural diagram of a roof support for a coal mine roadway without coal pillars in the dynamic pressure influence zone.

[0017] As shown in the figure: 1. Abutment rod, 2. Support assembly, 3. Adjustment assembly, 4. Threaded rod, 5. Connecting rod, 6. Threaded cylinder, 7. Reinforcing assembly, 8. Connecting cylinder, 9. Telescopic rod, 10. Base rod, 11. First pull rope, 12. Second pull rope, 13. Protective net, 14. First extension rod, 15. Second extension rod. Detailed Implementation

[0018] 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.

[0019] Combined with appendix Figure 1 Appendix Figure 2 and attached Figure 4A roof support for the dynamic pressure-affected zone of coal mine roof cutting without coal pillars includes a flexible roof, several abutment rods 1 and a support assembly 2 disposed on the inner side of the roof. The abutment rods 1 have an arc-shaped structure and are connected by several connecting rods 5. An adjustment assembly 3 is provided between the ends of the abutment rods 1 to adjust the abutment rods 1 and the arch of the roof. The adjustment assembly 3 includes threaded rods 4 disposed on the inner side of the ends of the abutment rods 1. A threaded cylinder 6 is provided with the threads reversed relative to the threaded rods 4 and is threadedly engaged. The outer wall of the threaded cylinder 6 is provided with anti-slip properties.

[0020] When adjustments are needed based on the arch of the tunnel:

[0021] First, loosen the locking bolts to position the telescopic rod 9.

[0022] Then, rotate the threaded cylinder 6. Due to the reverse setting of the threaded rod 4, the threaded rods 4 on both sides drive the ends of the abutment rod 1 to move closer or further away from each other, thereby adjusting the arch of the abutment rod 1 and the roof plate, so that it can cooperate with the roadway. The connection between the roof plate and the roadway can be strengthened by the anchor bolts on the roof plate.

[0023] Combined with appendix Figure 3 and attached Figure 4 The support assembly 2 includes a base rod 10 connected to the ground, a first pull rope 11 between the base rod 10 and the end of the abutment rod 1, the first pull rope 11 being inclined outward in a downward direction, a first extension rod 14 at the bottom of the middle connecting cylinder 8, a second extension rod 15 at the top of the base rod 10, and a second pull rope 12 between the second extension rod 15 and the first extension rod 14.

[0024] Based on the tension structure, when the top plate is subjected to downward pressure, the top plate drives the first extension rod 14 downward through the adjustment component 3. Since the second extension rod 15 is connected to the bottom plate, the first extension rod 14 is transmitted to the bottom plate through the second pull rope 12 and the second extension rod 15. When the frame composed of the adjustment component 3, the first pull rope 11 and the abutment rod 1 cannot move or rotate, the entire frame can only maintain balance.

[0025] Combined with appendix Figure 2 and attached Figure 3 The inner side of the abutment rod 1 is provided with a reinforcing component 7 that can help improve the support strength of the abutment rod 1. The reinforcing component 7 includes a connecting cylinder 8 rotatably disposed in the middle of the threaded cylinder 6. The two sides of the abutment rod 1 are respectively hinged with telescopic rods 9 positioned by locking bolts. The other end of the telescopic rods 9 is hinged to the connecting cylinder 8.

[0026] The connecting cylinder 8 is designed to prevent the threaded cylinder 6 from interfering with the camber adjustment of the abutment rod 1. After the adjustment component 3 is adjusted, the telescopic rod 9 is positioned by the locking bolt, which facilitates auxiliary support for the middle part of the abutment rod 1.

[0027] Combined with appendix Figure 1 The end of the abutment rod 1 is connected to the support component 2 and cooperates with the support component 2 to form a channel. A protective component is provided outside the channel, including a protective net 13 covering the outside of the channel.

[0028] The installation of protective netting 13 facilitates the protection of the passageway, preventing falling rocks from directly entering the passageway and causing injury to personnel.

[0029] 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.

[0030] 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.

[0031] 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 roof support for the dynamic pressure-affected zone of coal mine roof cutting without coal pillars, comprising a flexible roof, a plurality of abutment rods (1) disposed on the inner side of the roof, and a support assembly (2), characterized in that: The abutment rod (1) has an arc-shaped structure. The abutment rod (1) is connected through several connecting rods (5). An adjustment component (3) is provided between the ends of the abutment rod (1) to adjust the arch of the top plate. The adjustment component (3) includes threaded rods (4) located on the inner side of the ends of the abutment rod (1). A threaded cylinder (6) is provided with the threaded rods (4) in the opposite direction and through threaded engagement. A reinforcing component (7) is provided on the inner side of the abutment rod (1) to help improve the support strength of the abutment rod (1). The ends of the abutment rod (1) are connected to the support component (2) and cooperate with the support component (2) to form a channel. A protective component is provided outside the channel.

2. The roof support for coal mine pillarless roof cutting and roadway formation in the dynamic pressure influence zone according to claim 1, characterized in that: The threaded cylinder (6) has an anti-slip feature on its outer wall.

3. The roof support for coal mine pillarless roof cutting and roadway formation in the dynamic pressure influence zone according to claim 1, characterized in that: The reinforcing component (7) includes a connecting cylinder (8) rotatably disposed in the middle of the threaded cylinder (6), and telescopic rods (9) that are positioned by locking bolts are respectively hinged on both sides of the abutment rod (1), and the other end of the telescopic rods (9) is hinged to the connecting cylinder (8).

4. The roof support for coal mine pillarless roof cutting and roadway formation in the dynamic pressure influence zone according to claim 1, characterized in that: The support assembly (2) includes a base rod (10) connected to the ground, a first pull rope (11) between the end of the base rod (10) and the end of the abutment rod (1), a first extension rod (14) at the bottom of the middle connecting cylinder (8), a second extension rod (15) at the bottom rod (10) and a second pull rope (12) between the second extension rod (15) and the first extension rod (14).

5. The roof support for coal mine pillarless roof cutting and roadway formation in the dynamic pressure influence zone according to claim 1, characterized in that: The protective components include a protective net (13) covering the outside of the passage.

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