Safety support device for coal mine

Abstract

The utility model relates to coal mine safety supporting device for carrying out continuous support to steel wire net on roadway inner wall, including steel arch and support mechanism, steel arch quantity is several, several steel arches are arranged along the interval of roadway trend, and each steel arch is tightly supported steel wire net on roadway inner wall, be provided with several support mechanisms between adjacent two steel arches, and it is convenient to carry out even support to steel wire net at steel arch interval, and each support mechanism includes telescopic link and jacks up the block of setting on telescopic link, and telescopic link length is adjustable, and adapts certain interval's steel arch, and telescopic link is connected between adjacent two steel arches, and jacks up the block is rotatably connected with telescopic link, and jacks up the block is tightly jacked up steel wire net upwards, and effectively supports steel wire net. The utility model supports steel wire net by steel arch, and also supports steel wire net at steel arch interval through support mechanism, so it can carry out the continuity support to steel wire net, and ensure the supporting effect of steel wire net.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a safety support device for coal mines. Background Technology

[0002] Coal mine roadways are passages excavated for mining hoisting, transportation, ventilation, drainage, and power supply. Because a large number of roadways need to be excavated underground, roadway support is particularly important. This ensures the smooth flow of the roadways and the stability of the surrounding rock, which is beneficial to coal mine production and construction.

[0003] The anchor-mesh support technology used in roadways involves installing wire mesh around the roadway and securing it to the surrounding rock walls with anchor bolts to increase roadway stability and prevent collapses and roof falls. However, the connection area between a single anchor bolt and the wire mesh is small and its strength is low, making it difficult for the anchor bolt alone to effectively support a large area of ​​the wire mesh.

[0004] To this end, several steel arch frames were also constructed in the tunnel. These steel arch frames were arranged at intervals along the tunnel direction. The steel arch frames were arched and tightly attached to the inner wall of the tunnel. The steel arch frames were used to control the deformation of the surrounding rock. At the same time, the steel arch frames pushed the wire mesh tightly to all sides, making it close to the inner wall of the tunnel, and further supporting the wire mesh.

[0005] However, it should be noted that the wire mesh is only fixed and tightened at the steel arch frame. Because there are gaps between the steel arch frames, the wire mesh between the two steel arch frames lacks direct support, making it difficult to form continuous support for the wire mesh. The wire mesh is prone to sagging or loosening under the action of gravity or surrounding rock pressure, making it difficult to restrain the gravel and increasing the risk of gravel falling. Summary of the Invention

[0006] This utility model addresses the problem of conventional steel arch frames being unable to continuously support wire mesh, providing a coal mine safety support device. As needed, a certain number of support mechanisms are installed between two adjacent steel arch frames. These support mechanisms support the wire mesh at intervals, increasing the continuity and stability of the wire mesh support. This allows for large-area, uniform support of the wire mesh, ensuring its effective support.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A coal mine safety support device is used to continuously support the wire mesh on the inner wall of the roadway. It includes a steel arch frame and a support mechanism. The number of steel arch frames is several, and the steel arch frames are arranged at intervals along the roadway. Each steel arch frame tightly supports the wire mesh on the inner wall of the roadway.

[0009] Several support mechanisms are provided between two adjacent steel arch frames to facilitate uniform support of the wire mesh at the intervals of the steel arch frames. Each support mechanism includes a telescopic rod and a top support block sleeved on the telescopic rod. The length of the telescopic rod is adjustable to fit steel arch frames at certain intervals. The telescopic rod is snapped between two adjacent steel arch frames. The top support block is rotatably connected to the telescopic rod and pushes the wire mesh upward to effectively support the wire mesh.

[0010] Furthermore, the steel arch frame is an arched structure formed by bending I-beams, and several supporting mechanisms are arranged at intervals along the bending direction of the steel arch frame. The wire mesh between two steel arch frames is supported over the largest possible area.

[0011] Furthermore, the telescopic rod includes an internally threaded cylinder and an externally threaded rod. The internally threaded cylinder is internally threaded to the externally threaded rod, and one end of the externally threaded rod extends out of the internally threaded cylinder. A prism-shaped turning block is provided on the extended end of the externally threaded rod to facilitate turning the externally threaded rod with a wrench.

[0012] Furthermore, the end of the internally threaded cylinder is prismatic, and a right mounting block is inserted into the end of the internally threaded cylinder. The right mounting block is snapped onto a steel arch frame. The beginning of the externally threaded rod is inserted into a left mounting block, and the left mounting block is snapped onto another steel arch frame. This facilitates the snap-fit ​​installation of the telescopic rod and the steel arch frame.

[0013] Furthermore, both the left and right mounting blocks are equipped with mounting bolts, which, when tightened, press firmly against the steel arch frame. This helps to keep the mounting blocks fixed in place.

[0014] Furthermore, the telescopic rod is tightly supported between the left and right mounting blocks, and one end of the internally threaded cylinder is threaded with an anti-loosening bolt. After the anti-loosening bolt is tightened, it presses firmly against the rotating block. This improves the anti-loosening performance of the telescopic rod and prevents it from easily loosening.

[0015] Furthermore, the top support block is sleeved on the internal threaded cylinder and rotatably connected to the internal threaded cylinder. There are multiple top support blocks, and the cross-section of the top support block is cam-shaped, which effectively adapts to the uneven environment of the inner wall of the tunnel. The top support block is hollow inside and a support plate is provided inside the top support block, which reduces weight while improving its structural strength.

[0016] Furthermore, a limiting bolt is provided on the top support block, with one end of the limiting bolt extending into the top support block and pressing tightly against the internal threaded cylinder. This helps to restrict the rotation of the top support block and ensures that the top support block is in a tightened position.

[0017] The beneficial effects of this utility model through the above technical solution are:

[0018] This utility model utilizes several steel arch frames to support the wire mesh. For the wire mesh in the interval areas of the steel arch frames, a certain number of support mechanisms are used to support it. This allows for continuous support of the wire mesh, minimizing the suspension of the wire mesh and ensuring that the wire mesh can be tightly attached to the inner wall of the tunnel, thus guaranteeing the support function of the wire mesh.

[0019] The support mechanism of this utility model includes a telescopic rod that is engaged between two steel arch frames and can be engaged at any position on the steel arch frames. After the telescopic rod is engaged and fixed, the top support block can be tamped to make it deflect upward, causing the top support block to press tightly against the wire mesh, reducing the suspended area, thereby achieving more reliable tunnel stability and safety. Attached Figure Description

[0020] Figure 1 This is a side view of the coal mine safety support device of this utility model. Only one support mechanism is shown in the figure. The enlarged view of point A in the figure is the side view of the top support block.

[0021] Figure 2 This is a schematic diagram of the support mechanism of the coal mine safety support device of this utility model.

[0022] Figure 3 This is a cross-sectional view of the support mechanism of the coal mine safety support device of this utility model.

[0023] Figure 4 This utility model relates to a coal mine safety support device. Figure 3 Schematic diagram of the middle left mounting block.

[0024] Figure 5 This utility model relates to a coal mine safety support device. Figure 3 Schematic diagram of the right-center mounting block.

[0025] Figure 6 This is a top view of the coal mine safety support device of this utility model. Only one support mechanism is shown in the figure.

[0026] The attached diagram is labeled as follows: 1 steel arch frame, 2 support mechanism, 3 telescopic rod, 31 internal threaded cylinder, 32 external threaded rod, 4 top support block, 41 support plate, 5 turning block, 6 right mounting block, 61 hexagonal hole, 7 slot, 8 left mounting block, 81 round hole, 9 mounting bolt, 10 limit bolt, 11 anti-loosening bolt. Detailed Implementation

[0027] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0028] like Figures 1-6As shown, a coal mine safety support device is used to continuously support the wire mesh on the inner wall of the roadway. The safety support device includes a steel arch frame 1 and a support mechanism 2. There are several steel arch frames 1, which are arranged at intervals along the roadway. The steel arch frame 1 is an arch structure formed by bending I-beams. Each steel arch frame 1 is close to the inner wall of the roadway and supports the wire mesh on the inner wall of the roadway.

[0029] In order to support the wire mesh at the intervals of the steel arch frame 1, several support mechanisms 2 are set between two adjacent steel arch frames 1. The support mechanisms 2 are arranged at intervals along the bending direction of the steel arch frame 1. Since the steel arch frame 1 is bent into an arch shape and matches the cross-section of the roadway, the support mechanisms 2 are arranged at intervals along the edge of the cross-section of the roadway. The specific number of support mechanisms 2 is selected according to actual needs.

[0030] In this embodiment, each support mechanism 2 includes a telescopic rod 3 and a top support block 4 sleeved on the telescopic rod 3. The length of the telescopic rod 3 is adjustable to accommodate steel arch frames 1 at certain intervals. Here, the telescopic rod 3 includes an internally threaded cylinder 31 and an externally threaded rod 32. The internally threaded cylinder 31 is internally threaded to the externally threaded rod 32, and one end of the externally threaded rod 32 extends out of the internally threaded cylinder 31. The length of the internally threaded cylinder 31 is close to the distance between two adjacent steel arch frames 1.

[0031] The length of the telescopic rod 3 can be adjusted by turning the internal threaded cylinder 31 or the external threaded rod 32. Specifically, a hexagonal prism-shaped turning block 5 is provided on the protruding end of the external threaded rod 32. By using a wrench in conjunction with the turning block 5, the external threaded rod 32 can be easily turned to tighten or loosen it.

[0032] During installation, the telescopic rod 3 is snapped between two adjacent steel arch frames 1. Specifically, the end of the internal threaded cylinder 31 is hexagonal prism-shaped, and a right mounting block 6 is inserted into the end of the internal threaded cylinder 31. A hexagonal hole 61 is opened on the right mounting block 6. The cross-section of the hexagonal hole 61 is hexagonal, and the end of the internal threaded cylinder 31 can be inserted into the hexagonal hole 61.

[0033] The right mounting block 6 is snapped onto a steel arch frame 1. A curved groove 7 is provided on the right mounting block 6. The right mounting block 6 can be snapped and fixed inside the steel arch frame 1 through the groove 7, and its position can be adjusted arbitrarily along the bending direction of the steel arch frame 1. In other words, the right mounting block 6 can also slide on the steel arch frame 1 and adjust its installation position through the groove 7.

[0034] The first end of the externally threaded rod 32 is inserted into a left mounting block 8. A circular hole 81 adapted to the externally threaded rod 32 is provided on the left mounting block 8, and the first end of the externally threaded rod 32 can be inserted into the circular hole 81. The left mounting block 8 is snapped onto another steel arch frame 1. The left mounting block 8 and the right mounting block 6 have the same structure. The left mounting block 8 also has the same slot 7, which can snap the left mounting block 8 onto the steel arch frame 1 and allow it to slide along the steel arch frame 1.

[0035] To ensure the fixed installation position of the entire support mechanism 2, mounting bolts 9 are provided on both the left mounting block 8 and the right mounting block 6. After the mounting bolts 9 are tightened, one end of the mounting bolt 9 extends into the slot 7 and presses tightly against the steel arch frame 1, thereby preventing the left mounting block 8 and the right mounting block 6 from loosening and avoiding the mounting blocks from moving.

[0036] In this embodiment, the top support block 4 is rotatably connected to the telescopic rod 3, that is, the top support block 4 is sleeved on the internal threaded cylinder 31 and rotatably connected to the internal threaded cylinder 31, and the top support block 4 can rotate relative to the internal threaded cylinder 31. After the top support block 4 rotates, it pushes the wire mesh upward and tightens it, which can provide stable support for the wire mesh.

[0037] Because the inner wall of the tunnel is uneven, multiple support blocks 4 are used to provide good support for the wire mesh. That is, multiple support blocks 4 are installed on the internal threaded cylinder 31. The cross-section of the support block 4 is cam-shaped. In this way, the support blocks 4 can be rotated flexibly according to the condition of the inner wall of the tunnel, so that each support block 4 can tighten the wire mesh and ensure the comprehensive support of the wire mesh.

[0038] The top support block 4 is hollow inside, reducing its weight and facilitating rotation. A support plate 41, which is convex in shape, is installed inside the top support block 4 to improve its structural strength and provide good support. At least one limiting bolt 10 is provided on each top support block 4, with one end extending into the top support block 4 and abutting against the internal threaded cylinder 31. Tightening the limiting bolt 10 restricts the top support block 4, preventing it from rotating easily.

[0039] The principle of this utility model is as follows: Several support mechanisms 2 are manufactured, and a certain number of support mechanisms 2 are installed between every two adjacent steel arch frames 1. During installation: First, the left mounting block 8 and the right mounting block 6 are respectively snapped into the corresponding positions of the two adjacent steel arch frames 1. In the initial state, the telescopic rod 3 is at its shortest length, and the top support block 4 has already been fitted onto the telescopic rod 3.

[0040] Insert one end of the internally threaded cylinder 31 into the right mounting block 6. At this time, the internally threaded cylinder 31 cannot rotate. Use a wrench to turn the externally threaded rod 32 to extend it until it is inserted into the left mounting block 8 and the screw block 5 is tightly pressed against the left mounting block 8. This ensures that the telescopic rod 3 extends and presses against the left mounting block 8 and the right mounting block 6. The telescopic rod 3 is then tightly supported between the left mounting block 8 and the right mounting block 6. Tighten the mounting bolts 9 on the mounting blocks to ensure that the mounting blocks are fixed in position.

[0041] To prevent the telescopic rod 3 from loosening, at least two anti-loosening bolts 11 are threadedly connected to one end of the internal threaded cylinder 31. The two anti-loosening bolts 11 are evenly distributed around the circumference of the internal threaded cylinder 31, and the axial direction of the anti-loosening bolts 11 is consistent with the axial direction of the internal threaded cylinder 31. Tightening the anti-loosening bolts 11 causes them to extend, and after being tightened, they press against the rotating block 5, which restricts the rotation of the external threaded rod 32 and fixes the telescopic rod 3.

[0042] With the telescopic rod 3 fixed, the top support block 4 on the telescopic rod 3 is manually struck one by one with a tool to make it rotate upward and fit tightly with the wire mesh. Then, the limit bolt 10 on the top support block 4 is tightened to ensure that the current rotation posture of the top support block 4 is fixed, thus tightening the wire mesh.

[0043] Following the above procedure, the installation of support mechanism 2 is repeated. Support mechanism 2 is an auxiliary support method. Through support mechanism 2, the wire mesh between two adjacent steel arch frames 1 can be continuously supported, avoiding the wire mesh from being suspended, ensuring the support effect of the wire mesh, reducing the risk of falling gravel, and effectively improving the safety of roadway support.

[0044] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A coal mine safety support device for continuously supporting wire mesh on the inner wall of a roadway, characterized in that, It includes a steel arch frame (1) and a support mechanism (2). The number of steel arch frames (1) is several, and the several steel arch frames (1) are arranged at intervals along the direction of the roadway. Each steel arch frame (1) tightly supports the wire mesh on the inner wall of the roadway. Several support mechanisms (2) are provided between two adjacent steel arch frames (1). Each support mechanism (2) includes a telescopic rod (3) and a top support block (4) sleeved on the telescopic rod (3). The telescopic rod (3) is adjustable in length and is engaged between two adjacent steel arch frames (1). The top support block (4) is rotatably connected to the telescopic rod (3) and pushes the wire mesh upward.

2. The coal mine safety support device according to claim 1, characterized in that, The steel arch frame (1) is an arch structure formed by bending I-beams, and several of the supporting mechanisms (2) are arranged at intervals along the bending direction of the steel arch frame (1).

3. The coal mine safety support device according to claim 1, characterized in that, The telescopic rod (3) includes an internal threaded cylinder (31) and an external threaded rod (32). The internal threaded cylinder (31) is internally threaded to the external threaded rod (32). One end of the external threaded rod (32) extends out of the internal threaded cylinder (31). A prism-shaped rotating block (5) is provided on the extended end of the external threaded rod (32).

4. The coal mine safety support device according to claim 3, characterized in that, The end of the internal threaded cylinder (31) is prismatic, and a right mounting block (6) is inserted into the end of the internal threaded cylinder (31). The right mounting block (6) is snapped onto a steel arch frame (1). The beginning of the external threaded rod (32) is inserted into a left mounting block (8), and the left mounting block (8) is snapped onto another steel arch frame (1).

5. The coal mine safety support device according to claim 4, characterized in that, Both the left mounting block (8) and the right mounting block (6) are provided with mounting bolts (9), and the mounting bolts (9) are tightened and pressed against the steel arch frame (1).

6. The coal mine safety support device according to claim 4, characterized in that, The telescopic rod (3) is tightly supported between the left mounting block (8) and the right mounting block (6). One end of the internal threaded cylinder (31) is also threaded with an anti-loosening bolt (11). After the anti-loosening bolt (11) is tightened, it presses against the rotating block (5).

7. The coal mine safety support device according to claim 3, characterized in that, The top support block (4) is sleeved on the internal threaded cylinder (31) and rotatably connected to the internal threaded cylinder (31). There are multiple top support blocks (4). The cross section of the top support block (4) is cam-shaped. The top support block (4) is hollow inside. A support plate (41) is provided inside the top support block (4).

8. The coal mine safety support device according to claim 7, characterized in that, The top support block (4) is provided with a limiting bolt (10), one end of which extends into the top support block (4) and abuts against the internal threaded cylinder (31).

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