Advanced roof control device for anchor net cable of coal roadway

Abstract

The utility model relates to the technical field of coal mine roof control devices, in particular to a coal roadway anchor net cable advanced roof control device which comprises a first vertical beam, a second vertical beam and a third vertical beam which are arranged side by side. The second vertical beam is provided with a cross beam in a rotating structure mode, clamping columns are arranged on the lower end faces of the first vertical beam and the third vertical beam in a fixed structure mode, and limiting plates are arranged on the lower end faces of the clamping columns in a fixed structure mode. Clamping grooves used for being connected with the clamping columns are formed in the two ends of the cross beam, and the first vertical beam, the second vertical beam and the third vertical beam are connected with anchor rods; the rotatable cross beams are arranged on the second vertical beams, so that the adjacent vertical beams are supported; when one vertical beam is unstable, force is transmitted to other vertical beams through the cross beam, the safety accident of top plate collapse is avoided, and the construction safety is enhanced.

Description

Technical Field:

[0001] This application relates to the technical field of coal roof control devices, and particularly to a coal roadway bolt-mesh-cable advanced roof control device. Background Art:

[0002] The bolt-mesh-cable is a technology used for engineering support, mainly composed of cable bolts, rock bolts, plastic meshes and metal trapezoidal beams or W-shaped steel belts used in combination. This technology is mainly used to support the roof of coal mine roadways. By improving the shear and compression resistance of the rock formation, a strengthened bearing arch is formed to resist the deformation of the surrounding rock of the roadway, thereby maintaining the stability of the roadway.

[0003] When the existing bolt-mesh-cable is used for advanced roof control, several metal trapezoidal beams are arranged side by side at intervals, and then the metal trapezoidal beams are fixed to the roadway by using the cooperation of rock bolts, butterfly clips and nuts. If the pressure is too high, there is a high probability that the large nuts will fall off the rock bolts, causing the metal trapezoidal beams in this area to be unable to support the roof, resulting in the collapse of the roof in some areas, posing a greater safety hazard and increasing the risk of safety accidents. Utility Model Content:

[0004] To solve the above technical problems, the present utility model provides a coal roadway bolt-mesh-cable advanced roof control device, and the technical problem to be solved is: when the pressure is too high, the large nuts fall off the rock bolts, resulting in the metal trapezoidal beams being unable to support the roof, causing the collapse of the roof in some areas, posing a greater safety hazard. To solve the above technical problems, the technical solution adopted by the present utility model is:

[0005] A coal roadway bolt-mesh-cable advanced roof control device, comprising:

[0006] First vertical beam, second vertical beam and third vertical beam arranged side by side;

[0007] Cross beam, the cross beam is connected to the second vertical beam in a rotational structure manner;

[0008] Clamping post, the clamping post is arranged on the lower end surfaces of the first vertical beam and the third vertical beam in a fixed structure manner, and a limiting plate is arranged on the lower end surface of the clamping post in a fixed structure manner;

[0009] A clamping slot for connecting the clamping post, the clamping slot is opened at both ends of the cross beam;

[0010] Rock bolt, the rock bolt is connected to the first vertical beam, the second vertical beam and the third vertical beam.

[0011] Further, a hollow shaft through which the rock bolt passes is connected and arranged on the lower end surface of the second vertical beam, and the middle part of the cross beam is connected to the second vertical beam through the hollow shaft.

[0012] Further, the hollow shaft is also provided with a limiting plate, and a through hole through which the rock bolt passes is opened in the middle of the limiting plate; the hollow shaft passes through the cross beam and is connected to the limiting plate in a fixed structure manner.

[0013] Furthermore, embedding grooves are formed on both opposite end faces of the cross beam, and a pull plate is arranged in the embedding groove in a telescopic structure manner; the clamping groove is located on the outer edge of the pull plate.

[0014] Furthermore, a locking bolt is arranged on the pull plate outside the opening of the clamping groove in a threaded engagement manner.

[0015] Furthermore, a handle is arranged on the outer end face of the pull plate.

[0016] Furthermore, butterfly clips and large nuts are arranged on the anchor bolts at the lower parts of the first vertical beam, the second vertical beam and the third vertical beam.

[0017] The beneficial effects of the utility model are as follows: by arranging a rotatable cross beam on the second vertical beam, it plays a supporting role for adjacent vertical beams; when one of the vertical beams becomes unstable, the force is transmitted to other vertical beams through the cross beam, avoiding the occurrence of safety accidents such as roof collapse and enhancing the construction safety.

[0018] By arranging a telescopic pull plate, the length of the cross beam can be adjusted according to the distance between adjacent vertical beams, enhancing the versatility and adaptability of the structure, and the installation is simple and convenient, and the space utilization rate is also improved. Description of the drawings:

[0019] Figure 1 It is a schematic view of the bottom structure of the utility model.

[0020] Figure 2 It is an exploded schematic view of the utility model.

[0021] Figure 3 It is a schematic view of the front structure of the cross beam of the utility model.

[0022] In the figure:

[0023] 1, the first vertical beam; 2, the second vertical beam; 3, the third vertical beam; 4, the cross beam; 5, the clamping column; 6, the clamping groove; 7, the anchor bolt; 8, the hollow shaft; 9, the locking bolt; 10, the limiting plate; 11, the embedding groove; 12, the pull plate; 13, the handle. Specific implementation manners:

[0024] To make the purpose, technical solutions and advantages of the implementation of the utility model clearer, the utility model will now be further described in detail with reference to the drawings and the following embodiments, so that the public can better master the implementation method of the utility model. The specific implementation scheme of the utility model is as follows:

[0025] A gob-side entry anchor-net-cable advanced roof control device, comprising a first vertical beam 1, a second vertical beam 2 and a third vertical beam 3 arranged in parallel; the second vertical beam 2 is provided with a cross beam 4 in a rotating structure manner, and the lower end surfaces of the first vertical beam 1 and the third vertical beam 3 are provided with clamping columns 5 in a fixed structure manner, and the lower end surface of the clamping column 5 is provided with a limiting plate 10 in a fixed structure manner; clamping grooves 6 for connecting the clamping columns 5 are opened at both ends of the cross beam 4, and the first vertical beam 1, the second vertical beam 2 and the third vertical beam 3 are connected to the anchor bolts 7; by arranging a rotatable cross beam 4 on the second vertical beam 2, a supporting effect is exerted on adjacent vertical beams; when one of the vertical beams becomes unstable, the force is transmitted to other vertical beams through the cross beam 4, avoiding the occurrence of safety accidents of roof collapse and enhancing the construction safety.

[0026] It should be noted that a hollow shaft 8 through which the anchor bolt 7 passes is connected and arranged at the lower end surface of the second vertical beam 2; the middle part of the cross beam 4 is connected to the second vertical beam 2 through the hollow shaft 8; the setting of this structure is beneficial to the rotation of the cross beam 4 and can reduce local stress concentration.

[0027] Furthermore, the hollow shaft 8 is also provided with a limiting plate 10, and a through hole through which the anchor bolt 7 passes is opened in the middle of the limiting plate 10; the hollow shaft 8 passes through the cross beam 4 and is connected to the limiting plate 10 in a fixed structure manner; the structure of this limiting plate 10 is convenient for restricting the position of the cross beam 4 and avoiding the cross beam 4 falling off the vertical beam due to external reasons, ensuring the stability of the cross beam 4.

[0028] It should be elaborated that embedding grooves 11 are opened on both opposite end faces of the cross beam 4, and a pull plate 12 is arranged in the embedding grooves 11 in a telescopic structure manner, and the clamping grooves 6 are located at the outer edge of the pull plate 12; by arranging a telescopic pull plate 12, the length of the cross beam 4 can be adjusted according to the distance between the vertical beams, enhancing the versatility and adaptability of this structure, and the installation is simple and convenient, and the space utilization rate is also improved.

[0029] Furthermore, a locking bolt 9 is arranged on the pull plate 12 outside the opening of the clamping groove 6 in a threaded engagement manner, and the locking bolt 9 is used for fixing the clamping groove 6 and the clamping column 5; a handle 13 is arranged on the outer end face of the pull plate 12, and the setting of the handle 13 is convenient for the telescopic movement of the pull plate 12, saving manpower and improving work efficiency.

[0030] It should be elaborated that butterfly clips and large nuts are arranged on the anchor bolts 7 at the lower parts of the first vertical beam 1, the second vertical beam 2 and the third vertical beam 3; the anchor bolts 7 are connected to the first vertical beam 1, the second vertical beam 2 and the third vertical beam 3 through the butterfly clips and the large nuts, and the setting of this structure strengthens the stability of the overall structure.

[0031] The working principle and working process of the present utility model are as follows:

[0032] Fix the first vertical beam 1, the second vertical beam 2 and the third vertical beam 3 on the roof by anchor bolts 7, butterfly clips and big nuts, and rotate the cross beam 4 through the hollow shaft 8; after rotating to the predetermined position, according to the distance between the vertical beams, pull out the pull plate 12 from the embedded groove 11 by the handle 13 for a corresponding length; then loosen the locking bolt 9 on the outer end face of the pull plate 12, align the card slot 6 on the pull plate 12 with the clamping post 5 for clamping, and then tighten the locking bolt 9 to ensure a firm connection between the card slot 6 and the clamping post 5, thus completing the fixation of the cross beam 4.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Although the present utility model is described according to a limited number of embodiments, those skilled in the art in this technical field should understand that other embodiments can be conceived within the scope of the present utility model thus described, benefiting from the above description.

Claims

1. A gob-side entry retaining device with advanced roof control by bolt-net-cable, characterized in that, Including: The first vertical beam (1), the second vertical beam (2) and the third vertical beam (3) arranged in parallel; The cross beam (4), and the cross beam (4) is connected to the second vertical beam (2) in a rotational structure manner; The clamping column (5), and the clamping column (5) is arranged on the lower end faces of the first vertical beam (1) and the third vertical beam (3) in a fixed structure manner, and a limiting plate (10) is arranged on the lower end face of the clamping column (5) in a fixed structure manner; The clamping groove (6) for connecting the clamping column (5), and the clamping groove (6) is opened at both ends of the cross beam (4); The anchor rod (7), and the anchor rod (7) is connected to the first vertical beam (1), the second vertical beam (2) and the third vertical beam (3).

2. The advanced roof control device with anchor net and cable in coal roadway according to claim 1, characterized in that: A hollow shaft (8) through which the anchor rod (7) passes is connected to the lower end face of the second vertical beam (2); The middle part of the cross beam (4) is connected to the second vertical beam (2) through the hollow shaft (8).

3. The advanced roof control device for bolt-net-cable in coal roadway according to claim 2, characterized in that: The hollow shaft (8) is also provided with a limiting plate (10), and a through hole for the anchor rod (7) to pass through is opened in the middle of the limiting plate (10); The hollow shaft (8) passes through the cross beam (4) and is connected to the limiting plate (10) in a fixed structure manner.

4. The advanced roof control device with bolt-net-cable in coal roadway according to claim 1, characterized in that: Chamfered grooves (11) are opened on both opposite end faces of the cross beam (4), and a pull plate (12) is arranged in the chamfered grooves (11) in a telescopic structure manner; The clamping groove (6) is located at the outer edge of the pull plate (12).

5. The advanced roof control device with bolt-net-cable in coal roadway according to claim 4, characterized in that: A locking bolt (9) is arranged on the pull plate (12) outside the opening of the clamping groove (6) in a threaded engagement manner.

6. The advanced roof control device with bolt-net-cable support in coal roadway according to claim 4, characterized in that: A handle (13) is arranged on the outer end face of the pull plate (12).

7. A gob-side entry retaining device with advanced roof control by anchor net and cable according to claim 6, characterized in that: Butterfly clamps and big nuts are arranged on the anchor rods (7) at the lower parts of the first vertical beam (1), the second vertical beam (2) and the third vertical beam (3).

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