A device for preventing sidewall collapse at the tunnel face

Abstract

This utility model relates to the field of tunneling technology, specifically to a tunneling face anti-sparging device. It includes a top beam lug mounted on the front beam of the machine-mounted support top beam. A main protective frame is located below the top beam lug, rotatably connected to the inner wall of the top beam lug. A hydraulic cylinder is rotatably connected to the inner wall of the top beam lug, with its output end rotatably connected to the inner wall of the main protective frame. Secondary protective frames are rotatably connected to both sides of the main protective frame. An extension component is provided on the inner wall of the secondary protective frames to expand the overall protection area. This utility model, by installing the top beam lug on the front beam of the machine-mounted support top beam, uses the hydraulic cylinder to rotate the main and secondary protective frames, placing them in a protective posture. Then, the secondary protective frames are rotated and positioned using a positioning component. Finally, a flexible protective net is installed on the main and secondary protective frames, thereby achieving effective full-section protection of the tunneling face and reducing the occurrence of sparging injuries.

Description

Technical Field

[0001] This utility model relates to the field of tunneling technology, and in particular to a device for preventing slab collapse at the face of a tunneling working face. Background Technology

[0002] Coal mine tunneling is a core preliminary process in coal mining, aiming to excavate a passage from the surface to the underground coal seam, laying the foundation for subsequent coal mining, ventilation, transportation, and personnel and equipment access. It is mainly divided into two categories: rock tunneling (crossing rock strata) and coal tunneling (advancing along the coal seam). During the operation, the tunneling route is first determined through geological exploration, and then equipment such as roadheaders and tunneling drills are used to break the rock or coal seam. At the same time, scraper conveyors and belt conveyors are used to remove gangue and coal blocks in a timely manner.

[0003] In daily work, it has been found that the existing temporary support and machine-mounted support of excavators can only protect the roof and not the face. The current full-section protection measures have a low safety factor. Due to the limitations of the operation process, workers need to frequently enter the face area that is not effectively protected to carry out work, and are directly exposed to the dangerous environment of the face spalling, which leads to face spalling accidents that not only cause casualties, but also affect the progress of the operation. Utility Model Content

[0004] The purpose of this invention is to address the problem in existing technologies where workers frequently need to enter the unprotected face area to carry out their work, directly exposing themselves to the dangerous environment of coal face spalling, which can lead to injuries and fatalities, as well as affect the progress of the work. Therefore, this invention proposes a face spalling prevention device for tunneling faces.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a face-end anti-sparging device for tunneling faces, comprising a top beam lug mounted on the front beam of the machine-mounted support top beam, a main protective frame disposed below the top beam lug, the main protective frame being rotatably connected to the inner wall of the top beam lug, a hydraulic cylinder being rotatably connected to the inner wall of the top beam lug, the output end of the hydraulic cylinder being rotatably connected to the inner wall of the main protective frame, and auxiliary protective frames being rotatably connected to both sides of the main protective frame, the inner wall of the auxiliary protective frames being provided with extension components for expanding the overall protection area. A positioning component is provided between the secondary protective frame and the main protective frame for positioning after the secondary protective frame is rotated and unfolded. A flexible protective net is provided on one side of the main and secondary protective frames. In use, by opening the hydraulic cylinder, the main protective frame can be rotated to form a protective state. At the same time, the secondary protective frame is rotated. After being positioned by the positioning component, the extension component can be opened as needed to extend the protective area. Then, the flexible protective net can be tied to the main and secondary protective frames with wire to achieve the protective operation.

[0006] Preferably, the expansion assembly includes an expansion frame that is slidably connected to the inner wall of the secondary protective frame. A threaded sleeve is fixedly connected to the surface of the secondary protective frame, and a screw is threadedly connected to the inner wall of the threaded sleeve. A positioning hole is formed on the surface of the expansion frame. The screw penetrates the secondary protective frame and is inserted into the inner wall of the positioning hole. Through the above components, when the expansion frame is unfolded, the screw can be rotated in the threaded sleeve, and the screw can be inserted into the positioning hole to achieve positioning.

[0007] Preferably, there are two positioning holes, which facilitates positioning during unfolding and folding.

[0008] Preferably, the positioning component includes a first insertion hole and a second insertion hole formed on the surfaces of the secondary protective frame and the main protective frame. A pin is inserted into the inner wall of the first insertion hole, and the pin is inserted into the inner wall of the second insertion hole. Through the above components, when the secondary protective frame is rotated and unfolded, the pin can be pushed in the first insertion hole to insert the pin into the second insertion hole, thereby completing the positioning.

[0009] Preferably, the inner wall of the secondary protective frame is threaded with a screw rod II, and the surface of the pin has two positioning holes II. The screw rod II is inserted into the inner wall of the positioning holes II. Through the above-mentioned components, the screw rod II can be rotated, and the screw rod II is inserted into the positioning holes II at the corresponding positions on the surface of the pin, thereby positioning the pin.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] 1. In this utility model, by installing the top beam ear seat on the front beam of the machine-mounted support top beam, the hydraulic cylinder drives the main protective frame and the secondary protective frame to rotate, so that they are in a protective posture. Then, the secondary protective frame is rotated and positioned by the positioning component. Finally, the flexible protective net is installed on the main protective frame and the secondary protective frame, thereby achieving effective protection of the entire cross section of the tunneling face and reducing the occurrence of accidents caused by sidewall slab injuries.

[0012] 2. In this utility model, by setting an extension component, the protective space can be stored and expanded by moving the extension frame in the secondary protective frame. Then, the screw and the positioning hole can be used to realize the positioning operation.

[0013] 3. In this utility model, the device is used simultaneously with the top temporary support, eliminating the need for equipment removal, personnel entry, and opening of the protective net support rods required by traditional full-section protection, thus shortening the protection time by 30%.

[0014] 4. In this utility model, the protective process is driven by a hydraulic system to improve the quality and strength of the protection. Attached Figure Description

[0015] Figure 1This utility model provides a three-dimensional structural diagram of a face-mounted anti-spar fracturing device for tunneling operations;

[0016] Figure 2 This utility model provides a partial structural schematic diagram of a face-mounted anti-slab-fracture device for tunneling operations;

[0017] Figure 3 This utility model provides an exploded structural diagram of the extended component of a face-mounted anti-spar fracturing device.

[0018] Figure 4 This utility model presents an exploded structural diagram of the positioning component of a face-mounted anti-slope device for tunneling faces.

[0019] Legend:

[0020] 1. Top beam ear seat; 2. Main protective frame; 3. Secondary protective frame; 4. Extension assembly; 41. Extension frame; 42. Threaded sleeve; 43. Screw one; 44. Positioning hole one; 5. Flexible protective net; 6. Hydraulic cylinder; 7. Positioning assembly; 71. Pin; 72. Screw two; 73. Positioning hole two; 74. Insertion hole one; 75. Insertion hole two. Detailed Implementation

[0021] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a face-mounted anti-slope protection device for tunneling faces, including a top beam lug 1 installed on the front beam of the machine-mounted support top beam, a main protective frame 2 provided below the top beam lug 1, the main protective frame 2 being rotatably connected to the inner wall of the top beam lug 1, a hydraulic cylinder 6 being rotatably connected to the inner wall of the top beam lug 1, the output end of the hydraulic cylinder 6 being rotatably connected to the inner wall of the main protective frame 2, a secondary protective frame 3 being rotatably connected to both sides of the main protective frame 2, an extension component 4 being provided on the inner wall of the secondary protective frame 3 for expanding the overall protection area, a positioning component 7 being provided between the secondary protective frame 3 and the main protective frame 2 for positioning after the secondary protective frame 3 is rotated and unfolded, and a flexible protective net 5 being provided on one side of the main protective frame 2 and the secondary protective frame 3.

[0022] In this implementation plan: When in use, the hydraulic cylinder 6 is opened, which drives the main protective frame 2 to rotate and form a protective state. At the same time, the secondary protective frame 3 is rotated. After being positioned by the positioning component 7, the extension component 4 can be opened as needed to extend the protective area. Then, the flexible protective net 5 can be tied to the main protective frame 2 and the secondary protective frame 3 with wire to achieve the protective operation.

[0023] Specifically, the extension component 4 includes an extension frame 41 that is slidably connected to the inner wall of the secondary protective frame 3. A threaded sleeve 42 is fixedly connected to the surface of the secondary protective frame 3. A screw 43 is threadedly connected to the inner wall of the threaded sleeve 42. A positioning hole 44 is opened on the surface of the extension frame 41. The screw 43 passes through the secondary protective frame 3 and is inserted into the inner wall of the positioning hole 44. There are two positioning holes 44 to facilitate positioning during unfolding and storage.

[0024] In this implementation scheme: when the extension frame 41 is unfolded, the screw 43 can be rotated in the threaded sleeve 42, and the screw 43 can be inserted into the positioning hole 44 at the corresponding position to achieve positioning.

[0025] Specifically, the positioning component 7 includes a first insertion hole 74 and a second insertion hole 75 on the surfaces of the secondary protective frame 3 and the main protective frame 2. A pin 71 is inserted into the inner wall of the first insertion hole 74, and the pin 71 is inserted into the inner wall of the second insertion hole 75. A screw 72 is threadedly connected to the inner wall of the secondary protective frame 3. Two positioning holes 73 are opened on the surface of the pin 71, and the screw 72 is inserted into the inner wall of the positioning hole 73.

[0026] In this implementation plan: when the secondary protective frame 3 is rotated and unfolded, the pin 71 can be pushed in the first insertion hole 74 to insert the pin 71 into the second insertion hole 75 to complete the positioning. At the same time, the second screw 72 can be rotated and inserted into the positioning hole 73 at the corresponding position on the surface of the pin 71 to position the pin 71.

[0027] Working principle: During use, the top beam lug 1 can be installed on the front beam of the airborne support top beam. For protection, hydraulic cylinder 6 is opened, extending and rotating the main protective frame 2 and the auxiliary protective frame 3 until the main protective frame 2 is perpendicular to the top beam lug 1. Then, the auxiliary protective frame 3 can be rotated to unfold it. After unfolding, the pin 71 can be inserted into the insertion hole 75, and then the screw 72 can be rotated to insert into the positioning hole 73 corresponding to the position on the surface of the pin 71. Positioning can be performed in the middle. When expansion is required, first rotate screw 43. Screw 43 will be freed from the restraint of positioning hole 44 on the surface of expansion frame 41. Then, pull expansion frame 41 to move in secondary protective frame 3. After expansion, rotate screw 43 again. Screw 43 will be inserted into the positioning hole 44 on the surface of expansion frame 41 at the corresponding position. Then, the flexible protective net 5 can be tied to the main protective frame 2, secondary protective frame 3 and expansion frame 41 with wire. It is not limited to wire tying, but can be used to cooperate with the protective operation.

Claims

1. A face-side anti-slope device for tunneling faces, comprising a top beam lug (1) installed on the front beam of the machine-mounted support top beam, characterized in that: A main protective frame (2) is provided below the top beam ear seat (1). The main protective frame (2) is rotatably connected to the inner wall of the top beam ear seat (1). A hydraulic cylinder (6) is rotatably connected to the inner wall of the top beam ear seat (1). The output end of the hydraulic cylinder (6) is rotatably connected to the inner wall of the main protective frame (2). A secondary protective frame (3) is rotatably connected to both sides of the main protective frame (2). An extension component (4) is provided on the inner wall of the secondary protective frame (3) to expand the overall protection area. A positioning component (7) is provided between the secondary protective frame (3) and the main protective frame (2) to position the secondary protective frame (3) after it is rotated and unfolded. A flexible protective net (5) is provided on one side of the main protective frame (2) and the secondary protective frame (3).

2. The anti-sparging device at the tunnel face according to claim 1, characterized in that: The extension component (4) includes an extension frame (41) that is slidably connected to the inner wall of the sub-protective frame (3). A threaded sleeve (42) is fixedly connected to the surface of the sub-protective frame (3). A screw (43) is threadedly connected to the inner wall of the threaded sleeve (42). A positioning hole (44) is opened on the surface of the extension frame (41). The screw (43) passes through the sub-protective frame (3) and is inserted into the inner wall of the positioning hole (44).

3. The anti-sparging device at the tunnel face according to claim 2, characterized in that: There are two positioning holes (44).

4. The anti-sparging device at the tunnel face according to claim 1, characterized in that: The positioning component (7) includes a first socket (74) and a second socket (75) formed on the surfaces of the secondary protective frame (3) and the main protective frame (2). A pin (71) is inserted into the inner wall of the first socket (74), and the pin (71) is inserted into the inner wall of the second socket (75).

5. A face-cutting anti-sparging device according to claim 4, characterized in that: The inner wall of the secondary protective frame (3) is threaded with a screw rod (72), and the surface of the pin (71) has two positioning holes (73), and the screw rod (72) is inserted into the inner wall of the positioning holes (73).

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