Supporting device for coal mine roadway tunneling

Abstract

The utility model relates to a coal mine roadway tunneling supporting device. The coal mine roadway tunneling supporting device comprises a mounting seat, a plurality of rotating mechanisms, a plurality of arc-shaped supporting plates and a supporting frame, the plurality of rotating mechanisms are respectively mounted on the mounting seat and are arranged at intervals; the multiple arc-shaped supporting plates are connected with the multiple rotating mechanisms in a one-to-one correspondence mode, and the rotating mechanisms can rotate the arc-shaped supporting plates so that the arc-shaped supporting plates can abut against the top of the coal mine tunnel; therefore, the arc-shaped supporting plates make full contact with the top of the irregular coal mine tunnel, and the stability and safety of the coal mine tunnel are enhanced.

Description

Technical Field

[0001] The utility model relates to the field of coal mine excavation support equipment, in particular to a coal mine tunnel excavation support device. Background Art

[0002] Coal mines are areas where humans mine coal resources in coal-rich mining areas. In the process of coal mining, people generally choose to dig tunnels underground to mine coal. During the mining process, coal slag or rock blocks will fall from the top of the hole after mining. At this time, it is usually necessary to mark the tunnel support points on the top of the hole, and a coal mine excavation support device is needed to support the tunnel support points.

[0003] The existing authorized public number is CN221568528U, which discloses a coal mine excavation support device, including a U-shaped plate, the bottom surfaces of both sides of the U-shaped plate are provided with connecting plates, the top surface of each connecting plate is provided with a groove, each of the grooves is provided with a connecting block via a first telescopic rod, the top surface of each connecting plate is connected to the bottom end of the U-shaped plate, the top surface of the U-shaped plate is provided with an arc-shaped support plate, and the bottom surface of each connecting plate is provided with a roller. The utility model has a simple structure and is easy to use. Through the cooperation of the first telescopic rod and the U-shaped plate, the height of the arc-shaped support plate can be adjusted, and the arc-shaped support plate can be brought into contact with the top of the tunnel for support, thereby meeting the use requirements of tunnels of different heights. The rolling of the device can drive the device to move, and thus can provide support at different positions, thereby bringing convenience to use.

[0004] However, the top of the actual coal mine tunnel is an irregular plane or curved surface, and the curved support plate cannot fully contact the top of the tunnel. Poor contact between the two may cause local uneven force, easily causing local collapse of the roof, affecting the stability of the tunnel and threatening personnel safety and production operations. Utility Model Content

[0005] Based on this, the purpose of the present utility model is to provide a coal mine tunnel excavation support device, which can fully contact with the irregular tunnel top and is safer.

[0006] The purpose of this utility model is achieved by the following scheme:

[0007] A coal mine tunnel excavation support device, comprising:

[0008] Mounting seat;

[0009] A plurality of rotating mechanisms are respectively mounted on the mounting base and spaced apart from each other;

[0010] A plurality of arc-shaped support plates, each of which is connected to a plurality of rotating mechanisms in a one-to-one correspondence, wherein the rotating mechanisms are capable of rotating the arc-shaped support plates so that the arc-shaped support plates abut against the top of the coal mine tunnel;

[0011] The support frame is installed on the mounting base.

[0012] In one embodiment, a stabilizing cavity is defined inside the mounting seat, and the mounting seat is provided with a plurality of mounting through holes respectively connected to the stabilizing cavity; a plurality of buffer cylinders are disposed in the stabilizing cavity;

[0013] The rotating mechanism includes a rotating seat and a first connecting rod. The rotating seat is installed on the arc-shaped support plate. One end of the first connecting rod is rotatably connected to the rotating seat. The other end of the first connecting rod passes through one of the mounting through holes and is plugged into one of the buffer cylinders. An elastic element is provided in the buffer cylinder. The elastic element is used to reduce the shaking of the arc-shaped support plate caused by the shaking of the mounting seat.

[0014] In one embodiment, the support frame includes a first support rod and a second support rod;

[0015] A groove is formed at one end of the second support rod, in which a lifting seat and a first push rod mechanism are placed. The first support rod is inserted into the groove and connected to one end of the lifting seat, and the other end of the lifting seat is connected to the output end of the first push rod mechanism. The first push rod mechanism can drive the lifting seat to move up and down.

[0016] In one embodiment, the coal mine tunnel excavation support device further includes a sliding base, one end of the sliding base is connected to the support frame, and the other end of the sliding base is provided with a pulley for contacting the ground.

[0017] In one embodiment, a liftable support mechanism is provided on the sliding base;

[0018] The liftable support mechanism includes a telescopic cylinder, a second connecting rod, a support seat and a stop bolt;

[0019] The telescopic cylinder is installed on the side wall of the sliding base. Both ends of the telescopic cylinder are open. The second connecting rod is inserted into the telescopic cylinder and connected to the support seat. A threaded hole is opened on the side wall of the telescopic cylinder. The stop bolt is screwed to the threaded hole. The support seat can abut against the ground and force the pulley to leave the ground.

[0020] In one embodiment, the coal mine tunnel support device further includes two protective side plates;

[0021] A second push rod mechanism is provided on both opposite sides of the mounting frame, and a translation seat is provided at the output end of the two second push rod mechanisms. The two protective side plates are respectively installed on the two translation seats belonging to different second push rod mechanisms. The second push rod mechanism is used to drive the translation seat to move so that the protective side plates abut against the side walls of the coal mine tunnel.

[0022] In one embodiment, a lighting mechanism is provided at the bottom of the mounting base.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Multiple rotatable curved plates are in contact with the top of the roadway at the same time, and each curved plate can independently make full contact with the contact area;

[0025] 2. The liftable buffer seat can achieve different heights of fit on the one hand, and can also buffer the shaking caused by the device being touched on the other hand, avoiding affecting the roadway and causing sand leakage;

[0026] 3. The entire device is supported by a liftable support frame, which is folded up when moving and lowered to the ground when support is needed, so that the pulley is suspended in the air to prevent the pulley from sliding and causing the device to shift;

[0027] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a coal mine tunnel excavation support device provided in this application;

[0029] Figure 2 for Figure 1 A partial cross-sectional view of a support frame in a coal mine tunnel excavation support device is provided;

[0030] Figure 3 for Figure 1 A partial cross-sectional view of a protective side plate, a second push rod mechanism, and a translation seat in a coal mine tunnel excavation support device is provided;

[0031] Figure 4 for Figure 1 A schematic diagram of the structure of a sliding base and a liftable support mechanism in a coal mine tunnel excavation support device is provided;

[0032] Figure 5 for Figure 4 A schematic structural diagram of a coal mine tunnel excavation support device from another perspective is provided;

[0033] In the figure, 1. mounting seat; 11. stabilizing chamber; 12. buffer cylinder; 2. rotating mechanism; 21. rotating seat; 22. first connecting rod; 3. arc-shaped support plate; 4. support frame; 41. first support rod; 42. second support rod; 43. lifting seat; 44. first push rod mechanism; 45. second push rod mechanism; 46. translation seat; 5. sliding base; 51. pulley; 52. liftable support mechanism; 53. telescopic cylinder; 54. second connecting rod; 55. support seat; 56. stop bolt; 6. protective side plate; 7. lighting mechanism. DETAILED DESCRIPTION

[0034] To facilitate understanding of the utility model, the following description will be more fully described with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the utility model.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "parallel," "first," "second," "third," and similar expressions used herein are for illustrative purposes only.

[0036] See Figure 1 , which shows a coal mine tunnel excavation support device provided by the utility model, the device includes a mounting seat 1, multiple rotating mechanisms 2, multiple arc-shaped support plates 3 and a support frame 4;

[0037] The mounting base 1 has an arched structure, and multiple rotating mechanisms 2 are respectively installed on the top of the arched door of the mounting base 1, and the multiple rotating mechanisms 2 are arranged at intervals from each other. The multiple arc-shaped support plates 3 are independent of each other, and the multiple rotating mechanisms 2 are respectively connected to the multiple support plates one by one; wherein the rotating mechanisms 2 can rotate the arc-shaped support plates 3 so that the arc-shaped support plates 3 are in contact with the top of the coal mine tunnel; a support frame 4 is also installed at the bottom of the mounting base 1, and the support frame 4 is used to abut against the ground to support the entire mounting base 1.

[0038] The working principle of the coal mine tunnel excavation support device provided by the utility model is:

[0039] When the coal mine tunnel excavation support device is in operation, the mounting base 1 is first placed in a suitable position within the tunnel. Multiple rotation mechanisms 2 are mounted on the mounting base 1 and connected to the curved support plates 3 in a one-to-one correspondence. When support is needed at the tunnel roof, the rotation mechanisms 2 are operated to rotate the curved support plates 3. During rotation, the curved support plates 3 gradually approach and adhere to the tunnel roof until they are in close contact with it, thereby transmitting pressure from the tunnel roof to the support system formed by the mounting base 1 and the support frame 4.

[0040] The beneficial effects of the coal mine tunnel excavation support device provided by the utility model are:

[0041] During coal mine tunneling, faced with complex and ever-changing roof conditions, whether it's the varying curvatures of the tunnel's arch or localized unevenness, the rotating mechanism 2 can precisely adjust the angle of the curved support plate 3, ensuring seamless connection with the roof. This precise support effectively avoids uneven localized force on the roof caused by support gaps or angle deviations, greatly improving the effectiveness of the support. Furthermore, compared to traditional fixed-angle support devices, this device can quickly adapt to roof morphology changes during different tunneling stages, eliminating the need for cumbersome equipment adjustments or replacements. This significantly improves operational efficiency and reduces construction delays.

[0042] Specifically, if Figure 2 As shown, a stabilizing cavity 11 is provided inside the mounting base 1, and a plurality of mounting through holes are provided in the mounting base 1 and are respectively connected to the stabilizing cavity 11; a plurality of buffer cylinders 12 are placed in the stabilizing cavity 11;

[0043] The rotating mechanism 2 includes a rotating seat 21 and a first connecting rod 22. The rotating seat 21 is installed on the arc-shaped support plate 3. One end of the first connecting rod 22 is rotatably connected to the rotating seat 21. The other end of the first connecting rod 22 passes through one of the mounting through holes and is plugged into one of the buffer tubes 12. An elastic element is provided in the buffer tube 12. The elastic element is used to reduce the shaking of the arc-shaped support plate 3 caused by the shaking of the mounting seat 1.

[0044] Specifically, when the mounting seat 1 shakes due to blasting operations, geological changes or other factors during the excavation of the coal mine tunnel, the first connecting rod 22 in the rotating mechanism 2 will have a tendency to displace. Since one end of the first connecting rod 22 is rotatably connected to the rotating seat 21 and the other end is plugged into the buffer cylinder 12 in the stabilizing chamber 11, the elastic element will produce resistance and buffering force to the displacement of the first connecting rod 22, thereby suppressing the displacement tendency of the first connecting rod 22. For example, when the mounting seat 1 shakes in a certain direction, causing the mounting seat 1 to transmit an interference force to the first connecting rod 22, when the interference force is transmitted to the buffer cylinder 12, the elastic element will be compressed, and the reaction force generated by it will prevent the interference force from continuing to be transmitted; in this way, the elastic element effectively weakens the impact of the shaking of the mounting seat 1 on the arc support plate 3, so that the arc support plate 3 can maintain a relatively stable state, thereby continuously and stably supporting the top of the tunnel. Preferably, the elastic element can be a mechanical element with good elasticity and compressibility, such as a spring, a bellows, an elastic rubber pad, etc.

[0045] It is understood that the rotation mechanism 2 can also be a worm gear mechanism, with a worm gear mounted on the mounting base 1, connecting the curved support plate 3 to the worm gear. By controlling the rotation of the worm gear, the curved support plate 3 can be precisely rotated to fit the tunnel roof. Alternatively, it can be a gear transmission mechanism, with a driving gear driven by a motor or manually, and a driven gear connected to the curved support plate 3. Preferably, the rotation mechanism 2 can be controlled by a motor to further reduce manual operation and improve the accuracy of adjusting the curved support plate 3.

[0046] In one embodiment, Figure 2 As shown, the support frame 4 includes a first support rod 41 and a second support rod 42;

[0047] A groove is formed at one end of the second support rod 42, in which a lifting seat 43 and a first push rod mechanism 44 are housed. The first support rod 41 is inserted into the groove and connected to one end of the lifting seat 43. The other end of the lifting seat 43 is connected to the output end of the first push rod mechanism 44. The first push rod mechanism 44 can drive the lifting seat 43 to move up and down. Preferably, the first push rod mechanism 44 can be an electric push rod, a hydraulic push rod, or an air piston push rod.

[0048] Specifically, when the first push rod mechanism 44 extends, its output end pushes the lifting seat 43 upward along the groove. Since the first support rod 41 is connected to the lifting seat 43, the first support rod 41 slides upward in the groove, thereby increasing the overall height of the support frame 4. Conversely, when the first push rod mechanism 44 contracts, the lifting seat 43 descends, driving the first support rod 41 downward, thereby lowering the height of the support frame 4. During this process, the first support rod 41 and the second support rod 42 always cooperate with each other, forming a stable support frame 4 structure through their mutual connection and mechanical transmission. This allows the support frame 4 to flexibly adapt to the height changes of different coal mine roadways and the dynamic changes in the roof height during excavation, ensuring that the curved support plate 3 fits tightly against the roadway roof and maintains effective support.

[0049] It is understood that the support frame 4 may also be a screw-type support frame 4, which is primarily composed of two rods and a screw. One of the rods has an internal thread, and the screw is threadedly connected to the rod. The other rod has a hole for the screw to pass through. When the screw is rotated, the rod with the internal thread moves along the axial direction of the screw, thereby achieving height adjustment. For example, by installing a handwheel or a motor drive device at one end of the screw, the screw can be rotated manually or automatically to change the distance between the two rods, thereby achieving the purpose of adjusting the height of the support frame 4.

[0050] In one embodiment, Figure 3 As shown, the coal mine tunnel support device also includes two protective side plates 6;

[0051] Second push rod mechanisms 45 are provided on opposite sides of the mounting frame. The output ends of the two second push rod mechanisms 45 are each provided with a translation seat 46. The two protective side panels 6 are respectively mounted on two translation seats 46 attached to different second push rod mechanisms 45. The second push rod mechanisms 45 are used to drive the translation seats 46 to move, so that the protective side panels 6 abut the side walls of the coal mine tunnel. Preferably, the second push rod mechanisms 45 may be electric push rods, hydraulic push rods, or air piston push rods.

[0052] Specifically, during support work, the extension and retraction of the second push rod mechanism 45 directly drives the horizontal movement of the translation seat 46. As the translation seat 46 moves, the protective side panels 6 connected to the translation seat 46 also move horizontally, gradually approaching and ultimately tightly contacting the side walls of the coal mine roadway. This effectively prevents rock collapse and spalling from the roadway sidewalls, which could harm workers and equipment, and provides a lateral safety barrier for the construction area.

[0053] In one embodiment, Figure 4 As shown, the coal mine tunnel excavation support device also includes a sliding base 5, one end of which is connected to the support frame 4. The other end of the sliding base 5 is provided with a pulley 51, which is used to abut the ground. Specifically, the pulley 51 enables the support device to be quickly and flexibly moved to a designated position on the tunnel surface, reducing the time and labor required to move the device and improving the overall efficiency of coal mine tunnel excavation.

[0054] Preferably, if Figure 4 、 Figure 5 As shown, the sliding base 5 is provided with a liftable support mechanism 52;

[0055] The liftable support mechanism 52 includes a telescopic cylinder 53, a second connecting rod 54, a support base 55 and a stop bolt 56;

[0056] The telescopic cylinder 53 is installed on the side wall of the sliding base 5. Both ends of the telescopic cylinder 53 are open. The second connecting rod 54 is inserted into the telescopic cylinder 53 and connected to the support seat 55. A threaded hole is provided on the side wall of the telescopic cylinder 53. The stop bolt 56 is screwed into the threaded hole. The support seat 55 can abut against the ground and force the pulley 51 to leave the ground.

[0057] Specifically, when the support device needs to be moved, the support base 55 is lifted off the ground, and the pulley 51 abuts the ground, allowing the support device to slide on the ground, reducing the time and labor required to move the device. To stabilize the support device in a specific position, the stop bolt 56 is rotated to release the restraint on the second connecting rod 54. The support base 55 is then pushed downward. Because the second connecting rod 54 is inserted into the telescopic cylinder 53 and connected to the support base 55, the support base 55 moves downward along the axial direction of the telescopic cylinder 53 until it firmly abuts the ground. At this point, the pulley 51 and the support base 55 jointly bear the weight of the entire device. Subsequently, the support base 55 is manually moved to bear the weight of the entire device. While the support base 55 is in contact with the ground and bearing the weight of the entire device, the pulley 51 lifts off the ground, shifting the device's support point from the pulley 51 to the support base 55. At this point, the stop bolt 56 is rotated in the opposite direction to tighten it against the second connecting rod 54, thereby locking the support base 55 in place and preventing it from moving accidentally.

[0058] Since the pulley 51 is prone to sliding during the support process, causing the device to misalign, using the support seat 55 instead of the pulley 51 can effectively prevent the device from being displaced or shaken due to factors such as roof pressure and external vibration, ensuring that the arc-shaped support plate 3 continuously and stably supports the tunnel roof. To adapt to different working conditions, the support seat 55 can be adjusted in height within a certain range through the cooperation of the telescopic cylinder 53 and the second connecting rod 54 to adapt to the unevenness of the tunnel floor, ensuring that the support seat 55 can fully contact the ground and provide uniform and stable support force, further enhancing the practicality and reliability of the entire support device in the complex coal mine tunnel environment.

[0059] It can be understood that the lifting support mechanism can also be a scissor-type mechanism, which consists of multiple groups of crossed connecting rods (shaped like scissors, connecting the fixed platform and the movable platform above and below respectively. The connecting rods are connected by a rotating shaft at the intersection point so that the connecting rods can rotate freely. When the movable platform is pushed by a power source such as a hydraulic cylinder, an electric push rod or a screw rod, the angle between the connecting rods will change. For example, when the power source is extended, the connecting rod angle gradually increases and the movable platform rises; conversely, the connecting rod angle decreases and the movable platform descends. This structure utilizes the stability principle of the triangle and can maintain good stability during the lifting process.

[0060] Preferably, Figure 2 As shown, a lighting mechanism 7 is also provided at the bottom of the mounting base 1 of the coal mine tunnel support device. Specifically, the lighting mechanism 7 can provide sufficient light in the dim environment of the coal mine tunnel, assisting operators to clearly observe the surrounding conditions and ensure accurate installation and safe operation of the support device.

[0061] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A coal mine tunnel excavation support device, characterized in that: include: Mounting seat (1); A plurality of rotating mechanisms (2), wherein the plurality of rotating mechanisms (2) are respectively mounted on the mounting seat (1) and are spaced apart from each other; A plurality of arc-shaped support plates (3), wherein the plurality of arc-shaped support plates (3) are connected to the plurality of rotating mechanisms (2) in a one-to-one correspondence, and the rotating mechanisms (2) are capable of rotating the arc-shaped support plates (3) so that the arc-shaped support plates (3) abut against the top of the coal mine tunnel; A support frame (4), wherein the support frame (4) is mounted on the mounting seat (1).

2. The coal mine tunnel excavation support device according to claim 1, characterized in that: A stabilizing cavity (11) is provided inside the mounting seat (1), and a plurality of mounting through holes are provided on the mounting seat (1) and are respectively connected to the stabilizing cavity (11); a plurality of buffer cylinders (12) are accommodated in the stabilizing cavity (11); The rotating mechanism (2) includes a rotating seat (21) and a first connecting rod (22), wherein the rotating seat (21) is mounted on the arc-shaped support plate (3), one end of the first connecting rod (22) is rotatably connected to the rotating seat (21), and the other end of the first connecting rod (22) passes through one of the mounting through holes and is plugged into one of the buffer cylinders (12), wherein an elastic element is provided in the buffer cylinder (12), and the elastic element is used to reduce the shaking of the arc-shaped support plate (3) caused by the shaking of the mounting seat (1).

3. The coal mine tunnel excavation support device according to claim 1, characterized in that: The support frame (4) comprises a first support rod (41) and a second support rod (42); A groove is formed at one end of the second support rod (42), and a lifting seat (43) and a first push rod mechanism (44) are arranged in the groove. The first support rod (41) is inserted into the groove and connected to one end of the lifting seat (43). The other end of the lifting seat (43) is connected to the output end of the first push rod mechanism (44). The first push rod mechanism (44) can drive the lifting seat (43) to move up and down.

4. The coal mine tunnel excavation support device according to claim 1, characterized in that: The coal mine tunnel excavation support device further comprises a sliding base (5), one end of the sliding base (5) is connected to the support frame (4), and the other end of the sliding base (5) is provided with a pulley (51), and the pulley (51) is used to abut against the ground.

5. The coal mine tunnel excavation support device according to claim 4, characterized in that: The sliding base (5) is provided with a liftable support mechanism (52); The liftable support mechanism (52) comprises a telescopic cylinder (53), a second connecting rod (54), a support seat (55) and a stop bolt (56); The telescopic cylinder (53) is mounted on the side wall of the sliding base (5), and both ends of the telescopic cylinder (53) are open. The second connecting rod (54) is plugged into the telescopic cylinder (53) and connected to the support seat (55). A threaded hole is provided on the side wall of the telescopic cylinder (53), and the stop bolt (56) is screwed to the threaded hole. The support seat (55) can abut against the ground and force the pulley (51) to leave the ground.

6. The coal mine tunnel excavation support device according to claim 1, characterized in that: The coal mine tunnel support device further comprises two protective side plates (6); A second push rod mechanism (45) is provided on opposite sides of the mounting frame, and a translation seat (46) is provided at the output end of each of the two second push rod mechanisms (45). The two protective side plates (6) are respectively installed on the two translation seats (46) belonging to different second push rod mechanisms (45). The second push rod mechanism (45) is used to drive the translation seat (46) to move so that the protective side plates (6) abut against the side wall of the coal mine tunnel.

7. The coal mine tunnel excavation support device according to any one of claims 1 to 6, characterized in that: The bottom of the mounting seat (1) is provided with a lighting mechanism (7).

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