Temporary support mesh fixing device for coal rock tunneling roadway

Abstract

The utility model relates to the technical field of coal mining production, in particular to a temporary supporting mesh fixing device for a coal rock tunneling roadway, and aims to solve the problems that when mesh fixing is performed on a rock wall of the coal rock tunneling roadway at present, due to the adoption of a traditional anchor rod mesh supporting mode, rapid tunneling is generally difficult to realize, and the overall efficiency of mining production is finally influenced. The device comprises a fixed steel pipe capable of being inserted into a drill hole and a telescopic pull rod coaxial with the steel pipe and capable of rotating, one end of the telescopic pull rod is driven by a handle, the other end of the telescopic pull rod can stretch out and clamp a hole wall, and the front end of the steel pipe fixes a supporting tray and presses a mesh. The supporting tray at the front end of the device compresses the mesh, rapid temporary supporting is achieved, after supporting is completed, the device can be conveniently disassembled and repeatedly used only by loosening the handle and retracting the telescopic pull rod, and the problems that a traditional method is low in efficiency, consumes a large number of materials and cannot be repeatedly used are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of coal mining production technology, specifically to a temporary support mesh fixing device for coal and rock tunneling roadways. Background Technology

[0002] During coal mine roadway excavation, to prevent rock spalling (local fracturing) in front of and on both sides of the roadway, temporary support is usually required after the excavation face is completed. Traditional temporary support mainly uses anchor bolt and mesh support to passively support the surrounding rock. This method is difficult to quickly meet the requirements of excavation operations. At the same time, existing anchor bolt and mesh support relies heavily on manual operation, which is labor-intensive and inefficient. Furthermore, since the fixing devices are mostly disposable, the material consumption is high, which is not conducive to resource conservation and cost control. Therefore, a simple, quick-to-install, and reusable temporary support mesh fixing device is needed to improve construction efficiency and reduce costs. Utility Model Content

[0003] This utility model provides a temporary support mesh fixing device for coal and rock tunneling roadways to solve the problems mentioned above.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A temporary support mesh fixing device for coal and rock tunneling includes a support tray, a fixed steel pipe vertically fixed to the side of the support tray, a telescopic rod movably installed through the fixed steel pipe, a second locking nut threadedly connected to one end of the telescopic rod extending out of the support tray, a first locking nut rotatably installed on one side of the second locking nut, and a front connecting piece movably connected to the other end of the telescopic rod.

[0006] Furthermore, a handle is fixedly connected to the circumferential side of the support tray, and the first locking nut is also fixedly connected to a handle.

[0007] This utility model has the following beneficial effects:

[0008] This utility model provides a temporary support mesh fixing device for coal and rock tunnels, including a fixed steel pipe that can be inserted into a borehole and a telescopic rod that is coaxial with and rotatable with the steel pipe. One end of the telescopic rod is driven by a handle, and the other end can extend and clamp the borehole wall. A support tray is fixed at the front end of the steel pipe and presses the mesh. In use, after inserting the device into the borehole, rotating the handle causes the telescopic rod to extend and be fixed to the borehole wall. The support tray at the front end of the device presses the mesh, achieving rapid temporary support. After the support is completed, simply release the handle to retract the telescopic rod, and the device can be easily disassembled and reused. This effectively solves the problems of low efficiency, high material consumption, and non-reusability of traditional methods. It also solves the problem that when fixing mesh on the rock wall of coal and rock tunnels, the traditional anchor bolt mesh support method is often difficult to achieve rapid tunneling, ultimately affecting the overall efficiency of mining production.

[0009] This utility model device has the advantages of simple structure, quick operation, and reusability. It can not only quickly tighten and fix the mesh, effectively preventing sharding and falling, but also save materials and reduce support costs due to the detachable and recyclable components, significantly improving tunneling efficiency. Compared with the existing technology, this device uses a standardized anchor bolt hole diameter matching design, which has strong adaptability; the manual crank operation does not require an additional power source; and the disc tightens the mesh to achieve rapid fixation, effectively solving the problems of low efficiency, high material consumption, and non-reusability of traditional methods. Attached Figure Description

[0010] Figure 1 This is a top view of the overall structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the overall structure of this utility model in its working state.

[0012] The meanings of the reference numerals in the attached figures are as follows:

[0013] 1. Supporting tray; 2. Fixing steel pipe; 3. Telescopic pull rod; 4. First locking nut; 5. Second locking nut; 6. Handle; 7. Front connecting piece; 8. Handle. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1-2 As shown, a temporary support mesh fixing device for coal and rock tunneling includes a support tray 1. A fixed steel pipe 2 is vertically fixed to the side of the support tray 1. A telescopic rod 3 is movably installed through the fixed steel pipe 2. One end of the telescopic rod 3 extending out of the support tray 1 is threadedly connected to a second locking nut 5. A first locking nut 4 is rotatably installed on one side of the second locking nut 5. The other end of the telescopic rod 3 is also movably connected to a front connecting piece 7.

[0016] A handle 6 is fixedly connected to the circumferential side of the support tray 1, and the first locking nut 4 is also fixedly connected to a handle 8.

[0017] The fixed steel pipe 2 is a φ30mm round steel pipe with an inner diameter of φ25mm. One end is connected to a circular support tray 1, which is a steel disc with a diameter of φ300mm and a thickness of 8mm. A φ10mm thick steel handle 6 is welded to the top of the disc for manual gripping. The telescopic rod 3 is a φ18mm round steel rod that can slide freely inside the fixed steel pipe 2. One end of the rod passes through the center of the support tray 1 and extends to the outside of the tray. A φ22mm first locking nut 4 and a φ18mm second locking nut 5 are threaded onto the exposed part of the telescopic rod 3. The telescopic rod 3 can be fixed or released by adjusting the tightness or looseness of these two nuts to adjust the telescopic length of the device. A front connecting piece 7 is connected to the front end of the telescopic rod 3. The front connecting piece 7 is used to attach to the roof or sidewall of the roadway to enhance the stability of the device. The total length of the telescopic rod 3 and the fixed steel pipe 2 is about 500mm. The support range can be adjusted according to actual needs to adapt to different roadway excavation distance requirements.

[0018] In practical application, the following steps are involved in the drilling preparation: After the tunneling face has been excavated to its designated position, anchor bolt holes with a diameter of approximately 34mm are drilled into the roof or coal seams on both sides of the roadway according to the support requirements. The specific diameter depends on the support parameters and the anchor bolt diameter. The drilling depth depends on the mesh size, rock strata conditions, and design. Insertion device: The fixing device is inserted longitudinally into the pre-drilled anchor hole, ensuring that the fixing steel pipe 2 is tightly attached to the hole wall. At this time, the telescopic rod 3 is in the retracted state. Fixing the mesh: The steel mesh to be supported is placed in front of the drill hole, so that the mesh is attached to the coal and rock surface. The support tray 1 is located on the front side of the mesh. The handle 6 is rotated along the direction of the fixing steel pipe 2, causing the telescopic rod 3 to rotate around the axis and extend outward. The head of the telescopic rod 3 abuts against the inner side of the hole wall to form a clamp. At the same time, the support tray 1 presses the steel mesh tightly against the roadway wall, achieving a secure fixation of the mesh. Monitoring and Adjustment: Support personnel can observe the position of the mesh and the device, and fine-tune the angle of handle 6 to achieve the appropriate tightening force for the telescopic rod 3 and the support tray 1, ensuring that the mesh is flat, fixed, and without loosening. Disassembly and Reuse: After the permanent support of the roadway, such as bolt and cable support or shotcrete support, simply rotate handle 8 in the opposite direction to retract the telescopic rod 3 into the fixed sleeve. Then, the device, along with the disc 1, can be removed from the borehole. Because the device has a slender shape when the telescopic rod 3 is retracted, the disassembly process is quick and unobstructed. The removed device can be used in the next construction cycle, demonstrating its reusability and resource conservation advantages. Through the above steps, support personnel can quickly complete the temporary fixation of the mesh in confined spaces without risking roof damage. The entire process is simple, safe, and efficient; therefore, the device has excellent practicality.

Claims

1. A temporary support mesh fixing device for coal and rock tunnels, characterized in that: Includes a support tray (1), a fixed steel pipe (2) is vertically fixed to the side of the support tray (1), a telescopic rod (3) is movably installed through the fixed steel pipe (2), a second locking nut (5) is threadedly connected to one end of the telescopic rod (3) extending out of the support tray (1), a first locking nut (4) is rotatably installed on one side of the second locking nut (5), and a front connecting piece (7) is movably connected to the other end of the telescopic rod (3).

2. The coal rock tunneling roadway temporary support mesh fixing device according to claim 1, characterized in that: The support tray (1) is fixedly connected to a handle (6) on its circumference, and the first locking nut (4) is also fixedly connected to a handle (8).

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