Guniting device for coal roadway tunneling

Abstract

The utility model relates to the technical field of coal roadways, in particular to a coal roadway tunneling guniting device, and solves the problems that in the prior art, when coal roadway tunneling guniting is carried out, sprayed dust cannot be controlled, so that a large amount of dust is pervaded in a roadway, the working environment is influenced, and the working efficiency is influenced. And the body health of workers is also influenced. A coal roadway tunneling guniting device comprises a frame body, one side of the inner side of the frame body is fixedly connected with a guniting pipe, one side of the top of the frame body is fixedly connected with a top frame, the lower portion of the inner side of the top frame is elastically connected with a cover frame, one side of the top frame is fixedly connected with a side plate, and one side of the side plate is fixedly connected with a driving motor through a bolt. According to the mode provided by the utility model, coal sprayed out of the guniting pipe is blocked through the cover frame, the coal is prevented from flying all around, the generation of dust is greatly reduced, meanwhile, the cover frame shakes, the coal dust attached to the cover frame can be shaken off, and very high practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal tunnels, in particular to a coal tunnel excavation spraying device. Background Art

[0002] Coal tunnels are essential passageways in the coal mining process, serving multiple functions, including coal transportation, equipment transport, and ventilation. They collectively refer to the shafts, tunnels, and brush chambers excavated for underground coal mining. Based on the relationship between the long axis of the tunnel and the horizontal plane, coal tunnels can be categorized as vertical, horizontal, and inclined. Based on their service scope and purpose, they can be divided into development tunnels, preparation tunnels, and mining tunnels. Development tunnels are used to create new or expand existing stages or levels, laying the foundation for a complete mine production system; preparation tunnels serve one or more sections or subsections of the mining area; and mining tunnels, including vertical and blind shafts, form and serve the mining face. Vertical shafts provide direct access to the surface and are used for coal hoisting and personnel lifting; blind shafts, which lack direct access to the surface, serve as connections between upper and lower levels, such as inclined shafts, blind inclines, and uphill and downhill operations. Inclined shafts have direct access to the surface and are used for coal hoisting and ventilation. Blind inclined shafts are used to connect adjacent levels. Uphill inclined shafts serve a mining area and are used to mine coal seams above their mining level. Downhill inclined shafts are excavated downward from transport tunnels to serve a mining area, such as adits, stone gates, coal gates, and adit tunnels. Adit tunnels have direct access to the surface and are used for coal transportation and ventilation. Stone gates are perpendicular or oblique to the direction of the coal seam. Coal gates are excavated within the coal seam and are perpendicular or oblique to the direction of the coal seam. Adit tunnels are excavated along the direction of the coal seam. Characteristics of coal seam tunnel construction: Coal seam tunnels are generally excavated along the coal seam or within the rock strata near the coal seam. They are vulnerable to gas threats, have poor tunnel stability, and are difficult to maintain. Therefore, during construction, it is necessary to strengthen gas inspections, implement appropriate measures to prevent gas accidents, and pay special attention to water exploration and drainage. Tunnel excavation and support: Tunnel excavation requires scientific planning that comprehensively considers local terrain conditions and external conditions. During excavation, timely tunnel support operations are necessary to ensure tunnel stability. Common support techniques include bolting. Tunnel orientation and location selection: Due to the large folds and various faults in coal seams, proper tunnel orientation is essential during construction to ensure proper tunnel positioning and avoid ineffective advance.

[0003] Shotcrete injection during coal tunneling is a critical engineering measure designed to improve the stability and safety of coal tunnels. Shotcrete forms a slurry film on the tunnel surface, effectively preventing the release of coal dust, improving the working environment, and safeguarding miners' health. Shotcrete fills tunnel voids, strengthens the compactness of the surrounding rock, and increases its bearing capacity, thereby enhancing the overall stability of the tunnel. The shotcrete layer effectively isolates air, reducing the possibility of spontaneous combustion of coal while preventing fires and explosions caused by coal dust accumulation. Shotcrete primarily uses raw materials such as cement, sand, gravel, and water. Sometimes, additives such as accelerators are added to enhance the strength and setting speed of the shotcrete. The appropriate material mix is ​​determined based on the specific conditions and design requirements of the tunnel, including tunnel cleaning, support inspection, measurement and initial design, and preparation of the shotcrete plan. Furthermore, the equipment, materials, and tools required for shotcrete injection must be prepared. Raw materials such as cement, sand, gravel, and water are added to a mixing barrel in a specific proportion and stirred until a uniform mixture is achieved. According to actual needs, additives such as accelerators can also be added, and the mixed slurry is sprayed onto the roadway surface through a spraying machine. During the spraying process, it is necessary to control parameters such as spraying thickness, uniformity and spraying speed to ensure the quality of the spraying layer.

[0004] When coal tunnel excavation is carried out, a large amount of grouting will be produced, most of which is dust slurry. The control of grouting is extremely important. However, we consider that when coal tunnel excavation is carried out, there is a lack of control over the sprayed dust, which will cause a large amount of dust to spread in the tunnel, thereby affecting the working environment and the health of the workers, which is extremely inconvenient. Therefore, a coal tunnel excavation grouting device is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a coal tunnel excavation spraying device, which solves the problem in the prior art that when performing coal tunnel excavation spraying, there is a lack of control over the sprayed dust, which causes a large amount of dust to spread in the tunnel, thereby affecting the working environment and the health of the workers.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A coal tunnel excavation spraying device includes a frame, an inner side of the frame is fixedly connected to a spraying pipe, and the top side of the frame is fixedly connected to a top frame, and the inner lower part of the top frame is elastically connected to a cover frame, one side of the top frame is fixedly connected to a side plate, and one side of the side plate is fixedly connected to a drive motor by bolts, and the other side of the side plate is rotatably connected to a rotating rod, one end of the rotating rod is sleeved with a cam, and the other end of the rotating rod passes through the side plate and is transmission-connected to the output shaft of the drive motor, and the cam is located at the top of the cover frame.

[0008] Preferably, a push plate slidably connected to the frame is provided on one side of the bottom of the cover frame, and a hydraulic cylinder is fixedly connected to one side of the outer wall of the frame by bolts, and one end of the hydraulic cylinder passes through the side wall of the frame and is fixedly connected to one side of the push plate.

[0009] Preferably, sliding blocks are fixedly connected to both sides of the cover frame, and both sliding blocks are slidably connected to the inner wall of the top frame through the sliding groove.

[0010] Preferably, the tops of the two sliding blocks are elastically connected to the inner tops of the two sliding slots respectively through compression springs.

[0011] Preferably, both sides of the top of the cover frame are fixedly connected to both sides of the inner side of the top frame through telescopic rods, and one end of the rotating rod passes through the side plate through the bearing sleeve.

[0012] Preferably, a slider is fixedly connected to one side of the bottom of the push plate, and the slider is slidably connected to the inner bottom of the frame through a slide rail.

[0013] The utility model has the following beneficial effects:

[0014] First, the shotcrete pipe is connected to the shotcrete equipment, and then the shotcrete work is carried out. At this time, the shotcrete coal will be transported to the cover frame and then fall from the cover frame to prevent the coal from scattering. The driving motor is started to drive the rotating rod to rotate, so that the cam will move the cover frame to make the cover frame shake, which can shake off the coal dust attached to the cover frame and avoid a large amount of dust accumulation on the cover frame. Compared with the prior art, when performing coal tunnel excavation and shotcreting, there is a lack of control over the sprayed dust, which will cause a large amount of dust to spread in the tunnel, thereby affecting the working environment and the health of the workers. The method proposed in the utility model blocks the coal sprayed from the shotcrete pipe through the cover frame to prevent the coal from scattering and greatly reduce the generation of dust. At the same time, the cover frame shakes to shake off the coal dust attached to the cover frame, which is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the overall main structure of the utility model;

[0017] Figure 2 This is a side view structural diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the cover frame structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the top frame structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the utility model when viewed from above.

[0021] In the figure: 1. frame; 2. spraying pipe; 3. push plate; 4. slider; 5. slide rail; 6. cover frame; 7. top frame; 8. side plate; 9. drive motor; 10. cam; 11. rotating rod; 12. telescopic rod; 13. sliding block; 14. sliding groove; 15. extrusion spring; 16. hydraulic cylinder. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Reference Figure 1-5 A coal tunnel excavation spraying device includes a frame 1, an inner side of the frame 1 is fixedly connected to a spraying pipe 2, the spraying pipe 2 is responsible for accurately spraying the slurry onto the surface of the coal tunnel to ensure the continuity and uniformity of the spraying operation, and a top frame 7 is fixedly connected to the top side of the frame 1, the top frame 7 serves as a supporting structure of a cover frame 6, ensuring that the cover frame 6 can be stably suspended in an appropriate position, and the inner lower part of the top frame 7 is elastically connected to the cover frame 6. This elastic connection design enables the cover frame 6 to vibrate when pushed by the cam 10, which helps to shake off the attached coal and dust. A side plate 8 is fixedly connected to one side of the top frame 7, and the side plate 8 is a driving motor 9 and The rotating rod 11 provides installation space and ensures the stability of the entire drive system. One side of the side plate 8 is fixedly connected to the drive motor 9 by bolts, and the other side of the side plate 8 is rotatably connected to the rotating rod 11. One end of the rotating rod 11 is sleeved with a cam 10. The rotating rod 11 serves as a medium for power transmission, transmitting the rotational force of the drive motor 9 to the cam 10, and the other end of the rotating rod 11 passes through the side plate 8 and is connected to the output shaft of the drive motor 9. The cam 10 is located at the top of the cover frame 6. This layout enables the cam 10 to directly act on the top of the cover frame 6, producing the best shaking effect, effectively shaking off the coal and dust on the cover frame 6.

[0024] Furthermore, a push plate 3 is provided on one side of the bottom of the cover frame 6 and is slidably connected to the frame body 1, and a hydraulic cylinder 16 is fixedly connected to one side of the outer wall of the frame body 1 by bolts, and one end of the hydraulic cylinder 16 passes through the side wall of the frame body 1 and is fixedly connected to one side of the push plate 3. The hydraulic cylinder 16 is used to drive the push plate 3 to move, so as to push out the coal at the bottom of the cover frame 6 for the subsequent use of the cover frame 6.

[0025] Furthermore, sliding blocks 13 are fixedly connected to both sides of the cover frame 6, and the two sliding blocks 13 are slidably connected to the inner wall of the top frame 7 through the sliding groove 14. The sliding blocks 13 slide in the sliding groove 14, thereby enhancing the stability of the cover frame 6 during movement.

[0026] Furthermore, the tops of the two sliding blocks 13 are elastically connected to the inner tops of the two sliding slots 14 respectively through the compression springs 15 .

[0027] Furthermore, both sides of the top of the cover frame 6 are fixedly connected to the inner sides of the top frame 7 through a telescopic rod 12, and one end of the rotating rod 11 passes through the side plate 8 through the bearing sleeve. The telescopic rod 12 can improve the stability of the cover frame 6.

[0028] Furthermore, a slider 4 is fixedly connected to one side of the bottom of the push plate 3, and the slider 4 is slidably connected to the inner bottom of the frame 1 through a slide rail 5. The slider 4 slides in the slide rail 5, thereby improving the stability of the push plate 3 during movement.

[0029] In summary:

[0030] In the practical application of the coal tunnel excavation shotcreting device of the present invention, its operation process is carefully designed to optimize work efficiency and minimize environmental pollution. First, ensure that the shotcrete pipe 2 is reliably connected to the high-performance shotcrete equipment. This step is the basis for the smooth progress of the shotcrete operation. After the connection is completed, the shotcrete system is started. At this time, the special shotcrete pipe 2 begins to spray the evenly mixed slurry at high pressure to the designated coal tunnel surface. This process not only strengthens the tunnel wall, but also effectively controls the shedding and scattering of coal. As the shotcrete work proceeds, the coal fragments and the accompanying dust are guided into the special cover frame 6 structure under the combined action of gravity and shotcrete pressure. The design of the cover frame prevents the dust from spreading to the surrounding environment, significantly reduces the dust concentration at the construction site, and improves The working environment is improved and the health of workers is protected. In order to further improve the dust removal effect and maintain the efficient operation of the cover frame 6, the device integrates an innovative automatic cleaning mechanism. Specifically, the driving motor 9 drives the rotating rod 11 to rotate, and then drives the cam 10 to rotate. The cam 10 has a unique contour design. During rotation, it periodically contacts the cover frame 6 and applies a slight pushing force, causing the cover frame 6 to shake regularly. This ingenious mechanical action can effectively shake off the coal particles and dust attached to the inner wall of the cover frame 6, preventing them from accumulating into blocks and affecting the permeability and collection efficiency of the cover frame 6. Regularly performing this operation ensures that the cover frame 6 always maintains a good working condition, extends the service life of the equipment, and also reduces the safety risks and additional labor costs caused by manual cleaning.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal tunnel excavation shotcreting device, comprising a frame (1), characterized in that: The inner side of the frame (1) is fixedly connected to a spraying pipe (2), and the top side of the frame (1) is fixedly connected to a top frame (7), and the inner lower part of the top frame (7) is elastically connected to a cover frame (6), one side of the top frame (7) is fixedly connected to a side plate (8), and one side of the side plate (8) is fixedly connected to a drive motor (9) by bolts, and the other side of the side plate (8) is rotatably connected to a rotating rod (11), one end of the rotating rod (11) is sleeved with a cam (10), and the other end of the rotating rod (11) passes through the side plate (8) and is transmission-connected to the output shaft of the drive motor (9), and the cam (10) is located at the top of the cover frame (6).

2. A coal tunnel excavation shotcreting device according to claim 1, characterized in that: A push plate (3) is provided on one side of the bottom of the cover frame (6) and is slidably connected to the frame body (1), and a hydraulic cylinder (16) is fixedly connected to one side of the outer wall of the frame body (1) by bolts, and one end of the hydraulic cylinder (16) passes through the side wall of the frame body (1) and is fixedly connected to one side of the push plate (3).

3. A coal tunnel excavation shotcreting device according to claim 1, characterized in that: Both sides of the cover frame (6) are fixedly connected with sliding blocks (13), and the two sliding blocks (13) are slidably connected to the inner wall of the top frame (7) through sliding grooves (14).

4. A coal tunnel excavation shotcreting device according to claim 3, characterized in that: The tops of the two sliding blocks (13) are elastically connected to the inner tops of the two sliding grooves (14) respectively through compression springs (15).

5. A coal tunnel excavation shotcreting device according to claim 1, characterized in that: Both sides of the top of the cover frame (6) are fixedly connected to both sides of the inner side of the top frame (7) through telescopic rods (12), and one end of the rotating rod (11) passes through the side plate (8) through the bearing sleeve.

6. A coal tunnel excavation shotcreting device according to claim 2, characterized in that: A slider (4) is fixedly connected to one side of the bottom of the push plate (3), and the slider (4) is slidably connected to the inner bottom of the frame (1) via a slide rail (5).

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