A multi-section multi-piece adjustable height coal aggregate pier column supporting device for empty roadway

Abstract

The utility model relates to a kind of adjustable height's coal aggregate pier column supporting device of multiple segments and multiple pieces to empty lane, belong to coal mine underground roadway supporting device technical field. Including: at least one long fixed section, at least one short fixed section, fixed opening section, built-in movable section, pin shaft, split pin, bolt and nut;Supporting device is sequentially connected long fixed section, short fixed section, fixed opening section and built-in movable section by pin shaft and split pin from bottom to top. The utility model uses multi-segment multi-piece modular design, assembles by bolt, nut and pin shaft, both ensure the firmness of overall structure, and it is convenient to quickly disassemble, adapt to complex operating environment underground;By increasing and reducing the number of long fixed section and short fixed section, the height of supporting device can be coarsely adjusted.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mine underground roadway support devices, and in particular to a multi-segment, multi-piece, adjustable-height coal aggregate pier support device for underground roadways. Background Technology

[0002] In coal mines, underground working faces are often excavated along the face direction to facilitate ventilation, personnel movement, and material transport. When a coal mine working face passes through an empty roadway, the combined effect of the face's advance support pressure and the roadway's lateral support pressure can easily lead to stress concentration, causing abnormal mine pressure manifestations and seriously affecting production safety.

[0003] Currently, pump-filled support pillars are widely used in mine working faces for crossing empty roadways. Coal aggregate pillars, using coal as the skeleton material, can be directly cut and recycled by the coal mining machine, satisfying support safety and rapid advancement while avoiding resource waste. Moreover, compared to concrete and polymer material pillars, they do not impact the underground environment or coal quality. However, during the construction of coal aggregate pillars, while existing support devices can be fixed with fastening mechanisms and are easy to disassemble, they still suffer from poor stability, inconvenient height adjustment, and lack of flexibility, failing to adapt well to different empty roadway heights, thus causing inconvenience during construction.

[0004] Therefore, it is necessary to design a multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways to solve the above problems. Utility Model Content

[0005] This utility model provides a multi-segment, multi-piece, adjustable-height coal aggregate pier support device for underground tunnels, which adopts the following technical solution: including at least one long fixed segment, at least one short fixed segment, a fixed open segment, an internal movable segment, a pin, a cotter pin, a bolt, and a nut;

[0006] The long fixed section is assembled from two identical long fixed plates by bolts and nuts;

[0007] The short fixed section is assembled from two identical short fixed pieces by bolts and nuts;

[0008] The fixed opening section is assembled from two identical fixed opening plates by bolts and nuts;

[0009] The internal movable section is assembled from two identical internal movable pieces by bolts and nuts;

[0010] The support device is connected from bottom to top to a long fixed section, a short fixed section, a fixed open section, and an internal movable section via pins and cotter pins.

[0011] Furthermore, the long fixing plate includes a connecting plate, multiple stiffening plates, a guard plate, small pads, a side connecting plate, and large pads; multiple large pads are equidistantly arranged on the connecting plate; multiple small pads are equidistantly arranged on the side connecting plate; and multiple stiffening plates are arranged between the side connecting plate and the guard plate.

[0012] Furthermore, the short fixing piece includes multiple reinforcing plates, a second guard plate, a second connecting plate, a second side connecting plate, a small pad, and a large pad; multiple small pads are equidistantly arranged on the second side connecting plate; and multiple large pads are equidistantly arranged on the second connecting plate.

[0013] Furthermore, the fixed opening plate includes an upper connecting plate, an adjusting plate, a third protective plate, a third side connecting plate, a small pad, a fourth stiffening plate, a third connecting plate, and a large pad; the third side connecting plate is provided with multiple small pads at equal intervals; the third connecting plate is provided with multiple large pads at equal intervals.

[0014] Furthermore, the internal movable piece includes a grouting hole, a connecting plate four, a protective plate four, and a side connecting plate four.

[0015] Furthermore, the internal movable section is assembled inside the fixed opening section, and the side connecting plate is installed between the two adjusting plates.

[0016] Furthermore, the long fixed section, the short fixed section, and the fixed open section are each provided with a grouting channel, and coal aggregate slurry is injected into each section by a grouting pump; the grouting hole of the inner movable section is used to inject coal aggregate slurry into the fixed open section and the inner movable section, and the roof is completed by adjusting the inner movable section up and down.

[0017] In summary, this utility model has the following beneficial technical effects:

[0018] 1. It adopts a multi-segment, multi-piece modular design (long fixed segment, short fixed segment, fixed open segment, and internal movable segment), and is assembled with bolts, nuts and pins, which not only ensures the overall structural strength, but also facilitates quick disassembly and assembly, and adapts to the complex downhole working environment.

[0019] 2. By increasing or decreasing the number of long and short fixed sections, the height of the support device can be coarsely adjusted; the coordinated design of the internal movable section and the fixed opening section (the adjustment plate and the side connecting plate are linked) can achieve precise vertical height adjustment, flexibly adapting to the changing needs of different tunnel heights.

[0020] 3. The support device is made of Q235 steel, which combines lightness and high strength, reducing the difficulty of transportation and installation, while meeting the durability requirements for long-term use underground; the diameter range is 0.8-1.5m, which can be flexibly selected according to the tunnel size, and has a wide range of applications.

[0021] 4. The modular design simplifies the construction process and shortens the support time; the roof adjustment function (moving up and down through the internal movable section) and the highly stable structure effectively address the problem of concentrated mine pressure and ensure the safety of underground operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of this utility model;

[0023] Figure 2 This is a three-dimensional structural diagram of the long fixing piece of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the short fixing piece of this utility model;

[0025] Figure 4 This is a three-dimensional structural diagram of the fixed opening piece of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the internal movable piece of this utility model.

[0027] Explanation of reference numerals in the attached diagram: 1. Long fixed section; 2. Short fixed section; 3. Fixed opening section; 4. Internal movable section; 5. Pin; 6. Cotter pin; 7. Bolt; 8. Nut; 11. Connecting plate one; 12. Rib plate one; 13. Guard plate one; 14. Small pad; 15. Rib plate two; 16. Side connecting plate one; 17. Large pad; 21. Rib plate three; 22. Guard plate two; 23. Connecting plate two; 24. Side connecting plate two; 31. Upper connecting plate; 32. Adjusting plate; 33. Guard plate three; 34. Side connecting plate three; 35. Connecting plate three; 36. Rib plate four; 41. Grouting hole; 42. Connecting plate four; 43. Guard plate four; 44. Side connecting plate four. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 2-5 As shown, a specific embodiment of a multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways includes: at least one long fixed section 1, at least one short fixed section 2, a fixed open section 3, an internal movable section 4, a pin 5, a cotter pin 6, a bolt 7, and a nut 8.

[0030] Specifically, it adopts a multi-segment, multi-piece modular design (long fixed segment 1, short fixed segment 2, fixed open segment 3, and internal movable segment 4), and is assembled with bolts 7, nuts 8, pins 5 and cotter pins 6, which not only ensures the overall structural strength, but also facilitates quick assembly and disassembly, adapting to the complex working environment downhole.

[0031] Specifically, the height of the support device can be adjusted over a wide range by increasing or decreasing the number of long fixed sections 1 and short fixed sections 2.

[0032] Specifically, the long fixed section 1 is assembled from two identical long fixed plates using bolts 7 and nuts 8 to form a stable bottom support structure. The long fixed plate includes a connecting plate 11, multiple stiffening plates 12, a protective plate 13, small pads 14, a side connecting plate 16, and large pads 17. Multiple large pads 17 are equidistantly arranged on the connecting plate 11; multiple small pads 14 are equidistantly arranged on the side connecting plate 16; multiple stiffening plates 15 are arranged between the side connecting plate 16 and the protective plate 13. The stiffening plates 12 form a grid reinforcement structure, improving lateral pressure resistance.

[0033] Specifically, the short fixed section 2 is assembled from two identical short fixed plates using bolts 7 and nuts 8, and is used for intermediate height adjustment. The short fixed plate includes multiple stiffening plates 21, guard plates 22, connecting plates 23, side connecting plates 24, small pads 14, and large pads 17; multiple small pads 14 are equidistantly arranged on the side connecting plates 24; multiple large pads 17 are equidistantly arranged on the connecting plates 23. A grid reinforcement structure is formed between the stiffening plates 21 to improve lateral pressure resistance.

[0034] Specifically, the fixed opening section 3 is assembled from two identical fixed opening plates using bolts 7 and nuts 8, forming an adjustable cavity at the top. The fixed opening plate includes an upper connecting plate 31, an adjusting plate 32, a protective plate 33, a side connecting plate 34, small pads 14, stiffening plates 36, a connecting plate 35, and large pads 17. Multiple small pads 14 are equidistantly arranged on the side connecting plate 34; multiple large pads 17 are equidistantly arranged on the connecting plate 35. A grid reinforcement structure is formed between the stiffening plates 36 to improve lateral pressure resistance.

[0035] Specifically, the internal movable section 4 is assembled from two identical internal movable pieces by bolts 7 and nuts 8, and is embedded inside the fixed opening section 3. The internal movable piece includes a grouting hole 41, a connecting plate 42, a protective plate 43, and a side connecting plate 44.

[0036] Specifically, the support device consists of a long fixed section 1, a short fixed section 2, a fixed open section 3, and an internal movable section 4 installed from bottom to top. Each section is hinged by a pin 5 and a cotter pin 6 to form an integral pier structure.

[0037] Specifically, each section expands the load-bearing area through large pads 17, and evenly transfers the load to the tunnel floor; small pads are distributed on connecting plates 11, 23, 35 and 42 to enhance the local rigidity at the splicing of the sheet materials and avoid stress concentration at the bolt 7 connection.

[0038] In other preferred embodiments, such as Figure 1As shown, based on the height of the tunnel, the support device consists of a long fixed section 1, two short fixed sections 2, a fixed open section 3, and an internal movable section 4 installed sequentially from bottom to top. Each section is hinged by a pin 5 and a cotter pin 6 to form an integral pier structure.

[0039] In other preferred embodiments, the internal movable section 4 is fitted inside the fixed opening section 3, and the side connecting plate 44 is installed between the two adjusting plates 32. Adjusting the position of the side connecting plate 44 allows for a small range of height adjustment of the support device.

[0040] Specifically, by moving the internal movable section 4 up and down manually or mechanically, continuous height adjustment within a small range can be achieved, which makes up for the problem of "large interval between gears" in the segmented adjustment of long / short fixed sections. It is especially suitable for scenarios with local undulations in the roof of the empty roadway, ensuring that the top of the support device is completely in contact with the irregular roof, and avoiding support suspension or stress concentration caused by height deviation.

[0041] Specifically, when a slight settlement occurs in the roof of the tunnel, there is no need to disassemble and reassemble. The position of the side connecting plate 44 can be adjusted directly to allow the internal movable section 4 to descend synchronously with the roof, maintaining continuous contact between the top of the pier and the roof. This achieves "adaptive support" for the dynamic deformation of the surrounding rock, avoiding the risk of top voiding or pier breakage caused by the inability to adjust the height of traditional rigid support.

[0042] In other preferred embodiments, the long fixed section 1, the short fixed section 2 and the fixed open section 3 are respectively provided with grouting channels, and coal aggregate slurry is injected into each section by a grouting pump; the grouting hole 41 of the inner movable section 4 is used to inject coal aggregate slurry into the fixed open section 3 and the inner movable section 4, and the top is completed by adjusting the inner movable section 4 up and down.

[0043] Specifically, the independent grouting channels of long fixed section 1, short fixed section 2, and fixed open section 3 can precisely control the grouting volume for different sections, avoiding grout overflow or insufficient filling, ensuring uniform distribution of coal aggregate grout in each section, and forming a continuous and dense rigid support skeleton.

[0044] Specifically, when the internal movable section 4 injects grout into the top through the grouting hole 41, the position of the internal movable section 4 can be adjusted up and down simultaneously, so that the grout can be tightly bonded to the roof of the tunnel in a flowing state, eliminating the voids at the top. This "dynamic filling + position calibration" method of roofing avoids the stress concentration problem caused by the top suspension of traditional support devices, and evenly distributes the top contact stress to the entire pier section.

[0045] Specifically, each independent grouting channel supports a segmented construction mode of "assembling and grouting simultaneously", eliminating the need to wait for the overall assembly to be completed before grouting.

[0046] Specifically, the grouting hole 41 of the inner movable section 4 is linked with the height adjustment function. By finely adjusting the position of the inner movable section 4 during grouting, it can be ensured that the grout fills the top gap layer by layer, avoiding grout segregation or voids caused by excessive height difference in a single grouting, while reducing the time for manual measurement of the top gap.

[0047] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways, characterized in that, include: At least one long fixed section (1), at least one short fixed section (2), a fixed open section (3), an internal movable section (4), a pin (5), a cotter pin (6), a bolt (7), and a nut (8); The long fixed section (1) is assembled from two identical long fixed plates by bolts (7) and nuts (8); The short fixed section (2) is assembled from two identical short fixed pieces by bolts (7) and nuts (8); The fixed opening section (3) is assembled from two identical fixed opening plates by bolts (7) and nuts (8); The internal movable section (4) is assembled from two identical internal movable pieces by bolts (7) and nuts (8); The support device is connected from bottom to top to a long fixed section (1), a short fixed section (2), a fixed open section (3), and an internal movable section (4) via pins (5) and cotter pins (6).

2. The multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways according to claim 1, characterized in that, The long fixing plate includes a connecting plate (11), multiple stiffening plates (12), a guard plate (13), a small pad (14), a side connecting plate (16), and a large pad (17); multiple large pads (17) are provided at equal intervals on the connecting plate (11); multiple small pads (14) are provided at equal intervals on the side connecting plate (16); multiple stiffening plates (15) are provided between the side connecting plate (16) and the guard plate (13).

3. The multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways according to claim 1, characterized in that, The short fixing plate includes multiple stiffening plates three (21), guard plate two (22), connecting plate two (23), side connecting plate two (24), small pads (14) and large pads (17); multiple small pads (14) are provided at equal intervals on the side connecting plate two (24); multiple large pads (17) are provided at equal intervals on the connecting plate two (23).

4. The multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways according to claim 1, characterized in that, The fixed opening plate includes an upper connecting plate (31), an adjusting plate (32), a third guard plate (33), a third side connecting plate (34), a small pad (14), a fourth stiffener plate (36), a third connecting plate (35), and a large pad (17); the third side connecting plate (34) is provided with multiple small pads (14) at equal intervals; the third connecting plate (35) is provided with multiple large pads (17) at equal intervals.

5. A multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways according to claim 4, characterized in that, The internal movable plate includes a grouting hole (41), a connecting plate four (42), a protective plate four (43), and a side connecting plate four (44).

6. The multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways according to claim 5, characterized in that, The inner movable section (4) is assembled inside the fixed opening section (3), and the side connecting plate four (44) is installed between the two adjusting plates (32).

7. A multi-segment, multi-piece, adjustable-height coal aggregate pier support device for empty roadways according to claim 6, characterized in that, The long fixed section (1), the short fixed section (2) and the fixed open section (3) are respectively provided with grouting channels, and coal aggregate slurry is injected into each section by grouting pump; the grouting hole of the inner movable section (4) is used to inject coal aggregate slurry into the fixed open section (3) and the inner movable section (4), and the top is completed by adjusting the inner movable section (4) up and down.

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