A trapezoidal shed for small cross section support of a coal mine tunnel

Abstract

This utility model relates to the field of coal mine roadway support technology, specifically a trapezoidal canopy for small-section support of coal mine roadways, including a top beam, upper canopy legs on both sides of the top beam, and lower canopy legs at the bottom of the upper canopy legs; both ends of the top beam are equipped with first clamps, and a connecting shaft is rotatably connected to the bottom of the top beam. The beneficial effects are: during use, the positions of the top beam, upper canopy legs, and lower canopy legs can be actively adjusted to support the interior of the roadway; when creep occurs in the surrounding rock of the roadway, the top beam, upper canopy legs, and lower canopy legs bear the vertical force of the creeping surrounding rock, while the auxiliary support components support the horizontal force of the creeping surrounding rock, preventing the connection between the top beam and the upper canopy legs from loosening or even falling off due to the horizontal force of the creeping surrounding rock, thus ensuring the overall stability of the support.

Description

Technical Field

[0001] This utility model relates to the field of coal mine roadway support technology, and in particular to a trapezoidal shed for small cross-section support of coal mine roadways. Background Technology

[0002] Trapezoidal supports are a common type of roadway support structure in coal mines. They consist of a top beam, legs, back plate, and connectors, forming a trapezoidal shape that is wider at the bottom than the top. Materials include timber, mining H-beams, U-shaped steel, or reinforced concrete. Timber is suitable for roadways with small cross-sections and short service periods, while metal materials, especially U-shaped steel retractable supports, are suitable for complex conditions such as soft rock. Based on characteristics, they are divided into rigid and retractable types. Rigid supports are suitable for roadways with low surrounding rock pressure, while retractable supports adapt to surrounding rock pressure through component deformation. They are suitable for soft, fractured surrounding rock and trapezoidal cross-section roadways. Installation requires positioning along the centerline to ensure a tight connection between the beams and legs, and a solid backing to guarantee support stability.

[0003] A trapezoidal canopy for small-section support in coal mine roadways, disclosed in Chinese patent CN210460699U, solves the problem of high cost in existing support methods. However, compared with existing technologies and comparative solutions, this trapezoidal canopy still has the following problems in actual use:

[0004] The existing trapezoidal support structure consists of a top beam and legs connected by connectors. The load-bearing capacity is mainly transferred between the beam and legs through these connectors. Only after the surrounding rock in the tunnel undergoes a certain degree of deformation can sufficient load-bearing capacity be generated to support the surrounding rock. It cannot actively support the surrounding rock in the tunnel. At the same time, because the beam and legs are connected by connectors, when the surrounding rock in the tunnel creeps, in addition to the vertical load-bearing capacity, a horizontal force may also be generated at the connection between the beam and legs. This may cause the connection between the beam and legs to loosen or even fall off, affecting the overall stability of the support. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a trapezoidal canopy for small cross-section support of coal mine roadways.

[0006] The purpose of this utility model is achieved through the following technical solution: a trapezoidal canopy for small cross-section support of coal mine roadways, including a top beam, upper canopy legs on both sides of the top beam, and lower canopy legs at the bottom of the upper canopy legs.

[0007] Both ends of the top beam are equipped with first clamps, the bottom of the top beam is rotatably connected to a connecting shaft, the middle of the connecting shaft is equipped with an adjusting column, and both ends of the connecting shaft are fixedly connected to first screws.

[0008] The upper canopy legs include a bent section, and the two ends of the bent section are respectively fixedly connected to a first connecting section and a second connecting section;

[0009] An auxiliary support assembly is provided on the bending section. The auxiliary support assembly includes a second screw, which is threadedly connected to the bending section. One end of the second screw is fixedly connected to a first adjusting head, and the end of the second screw away from the first adjusting head is rotatably connected to a connector. A first support seat is hinged on the connector.

[0010] A second clamp is provided at one end of the lower canopy leg, and a second support seat is hinged to the end of the lower canopy leg away from the second clamp. A third screw is connected to the internal thread of the lower canopy leg, and a second adjusting head is fixedly connected to one end of the third screw.

[0011] Preferably, the first connecting segment is slidably connected to the inside of one end of the top beam, the end of the first connecting segment away from the bending segment is provided with a first screw hole, the inside of the first connecting segment is provided with a first sliding groove, and the first connecting segment is slidably connected to the first connecting plate through the first sliding groove.

[0012] Preferably, the second connecting section has a second screw hole at the end away from the bending section, and a second sliding groove is provided inside the second connecting section. The first connecting section is slidably connected to the second connecting plate through the second sliding groove.

[0013] Preferably, the second connecting section is slidably connected inside the lower canopy leg at the end away from the second support seat.

[0014] Preferably, the second connecting section is threadedly connected to the third screw through the second screw hole.

[0015] Preferably, the end of the third screw furthest from the second adjusting head is rotatably connected to the second connecting plate.

[0016] Preferably, the first connecting segment is threadedly connected to the first screw through the first screw hole, and the end of the first screw away from the connecting shaft is rotatably connected to the first connecting plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The trapezoidal canopy for small-section support in this coal mine roadway can actively adjust the positions of the top beam, upper canopy legs, and lower canopy legs during use to support the interior of the roadway. When creep occurs in the surrounding rock of the roadway, the top beam, upper canopy legs, and lower canopy legs bear the vertical force of creep, while the auxiliary support components support the horizontal force of creep. This prevents the connection between the top beam and the upper canopy legs from loosening or even falling off due to the horizontal force of creep, thus ensuring the overall stability of the support.

[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of the present invention in its working state;

[0022] Figure 2 This is a schematic diagram of the structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the top beam of this utility model;

[0024] Figure 4 This is a schematic diagram of the upper canopy leg of this utility model;

[0025] Figure 5 This is a schematic diagram of the auxiliary support component of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the lower canopy leg of this utility model.

[0027] In the diagram: 1. Top beam; 101. First clamp; 102. Connecting shaft; 103. Adjusting column; 104. First screw; 2. Upper canopy leg; 21. Bending section; 22. First connecting section; 221. First screw hole; 222. First sliding groove; 223. First connecting plate; 23. Second connecting section; 231. Second screw hole; 232. Second sliding groove; 233. Second connecting plate; 24. Auxiliary support assembly; 241. Second screw; 242. First adjusting head; 243. Connecting head; 244. First support seat; 3. Lower canopy leg; 301. Second clamp; 302. Second support seat; 303. Third screw; 304. Second adjusting head. Detailed Implementation

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, in part of which will be obvious from the description or may be learned by practice of the invention.

[0030] like Figure 1 and Figure 2 As shown, a trapezoidal canopy for small cross-section support of coal mine roadways includes a top beam 1, upper canopy legs 2 on both sides of the top beam 1, and lower canopy legs 3 at the bottom of the upper canopy legs 2.

[0031] like Figure 3 As shown, both ends of the top beam 1 are provided with first clamps 101, the bottom of the top beam 1 is rotatably connected to a connecting shaft 102, the middle of the connecting shaft 102 is provided with an adjusting column 103, and both ends of the connecting shaft 102 are fixedly connected with first screws 104.

[0032] like Figure 4 As shown, the upper canopy leg 2 includes a bent section 21, a first connecting section 22, and a second connecting section 23. The two ends of the bent section 21 are respectively fixedly connected to the first connecting section 22 and the second connecting section 23.

[0033] like Figure 4 and Figure 5 As shown, an auxiliary support assembly 24 is provided on the bending section 21. There are multiple auxiliary support assemblies 24, which are symmetrically distributed on both sides of the bending section 21. The auxiliary support assembly 24 includes a second screw 241, a first adjusting head 242, a connecting head 243, and a first support seat 244. The second screw 241 is threadedly connected to the bending section 21. One end of the second screw 241 is fixedly connected to the first adjusting head 242. The end of the second screw 241 away from the first adjusting head 242 is rotatably connected to the connecting head 243. The first support seat 244 is hinged on the connecting head 243. An auxiliary protrusion is provided on the side of the first support seat 244 away from the connecting head 243.

[0034] like Figure 2 and Figure 4As shown, the first connecting section 22 is slidably connected to the interior of one end of the top beam 1. The end of the first connecting section 22 away from the bending section 21 is provided with a first screw hole 221. The first connecting section 22 is threadedly connected to the first screw rod 104 through the first screw hole 221. The interior of the first connecting section 22 is provided with a first sliding groove 222. The first connecting section 22 is slidably connected to the first connecting plate 223 through the first sliding groove 222. The end of the first screw rod 104 away from the connecting shaft 102 is rotatably connected to the first connecting plate 223.

[0035] like Figure 2 and Figure 4 As shown, a second screw hole 231 is provided at the end of the second connecting section 23 away from the bending section 21, and a second sliding groove 232 is provided inside the second connecting section 23. The first connecting section 22 is slidably connected to the second connecting plate 233 through the second sliding groove 232.

[0036] like Figure 2 , Figure 4 and Figure 6 As shown, a second clamp 301 is provided at one end of the lower canopy leg 3, and a second support seat 302 is hinged to the end of the lower canopy leg 3 away from the second clamp 301. A second connecting section 23 is slidably connected to the interior of the end of the lower canopy leg 3 away from the second support seat 302. A third screw 303 is threadedly connected to the interior of the lower canopy leg 3. The second connecting section 23 is threadedly connected to the third screw 303 through a second screw hole 231. A second adjusting head 304 is fixedly connected to one end of the third screw 303, and the end of the third screw 303 away from the second adjusting head 304 is rotatably connected to the second connecting plate 233.

[0037] The work process is as follows:

[0038] S1. When in use, first rotate the adjusting column 103. The adjusting column 103 drives the first screw 104 to rotate through the connecting shaft 102. The first screw 104 drives the first connecting plate 223 to slide in the first connecting section 22, thereby driving the upper canopy leg 2 to move.

[0039] S2. Rotate the second adjusting head 304. The second adjusting head 304 drives the second connecting plate 233 to slide in the second connecting section 23 through the third screw 303, thereby driving the lower canopy leg 3 to move and reduce the distance between the two upper canopy legs 2 and the distance between the upper canopy leg 2 and the lower canopy leg 3.

[0040] S3. After the support is placed in the roadway, the adjusting column 103 is rotated in the opposite direction. The adjusting column 103 drives the first screw 104 to rotate through the connecting shaft 102. The first screw 104 drives the first connecting plate 223 to slide in the first connecting section 22, thereby driving the upper cantilever leg 2 to move and adjust the position of the upper cantilever leg 2 so that the upper cantilever leg 2 supports the angle between the top and side of the roadway.

[0041] S4. Rotate the second adjusting head 304 in the opposite direction. The second adjusting head 304 drives the second connecting plate 233 to slide in the second connecting section 23 through the third screw 303, thereby driving the lower canopy leg 3 to move, so that the top beam 1 supports the top of the roadway and can actively support the interior of the roadway.

[0042] S5. Then, the second screw 241 is rotated by the first adjusting head 242. The second screw 241 drives the first support seat 244 to move through the connecting head 243, so that the first support seat 244 abuts against the angle between the top and the side inside the tunnel.

[0043] S6. When creep occurs in the surrounding rock of the roadway, the top beam 1, the upper support leg 2, and the lower support leg 3 bear the vertical force of creep in the surrounding rock of the roadway, and the auxiliary support component 24 supports the horizontal force of creep in the surrounding rock of the roadway. This prevents the connection between the top beam 1 and the upper support leg 2 from loosening or even falling off due to the horizontal force of creep in the surrounding rock of the roadway, thus ensuring the overall stability of the support.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A trapezoidal canopy for small-section support in coal mine roadways, characterized in that: Includes a top beam (1), with upper canopy legs (2) on both sides of the top beam (1), and lower canopy legs (3) at the bottom of the upper canopy legs (2). The top beam (1) is provided with a first clamp (101) at both ends, and a connecting shaft (102) is rotatably connected to the bottom of the top beam (1). An adjusting column (103) is provided in the middle of the connecting shaft (102), and a first screw (104) is fixedly connected to both ends of the connecting shaft (102). The upper canopy leg (2) includes a bent section (21), and the two ends of the bent section (21) are respectively fixedly connected to a first connecting section (22) and a second connecting section (23); An auxiliary support assembly (24) is provided on the bending section (21). The auxiliary support assembly (24) includes a second screw (241), which is threadedly connected to the bending section (21). One end of the second screw (241) is fixedly connected to a first adjusting head (242), and the other end of the second screw (241) away from the first adjusting head (242) is rotatably connected to a connector (243). A first support seat (244) is hinged on the connector (243). A second clamp (301) is provided at one end of the lower canopy leg (3), and a second support seat (302) is hinged at the end of the lower canopy leg (3) away from the second clamp (301). A third screw (303) is threadedly connected to the inside of the lower canopy leg (3), and a second adjusting head (304) is fixedly connected at one end of the third screw (303).

2. The trapezoidal canopy for small-section support of coal mine roadways according to claim 1, characterized in that: The first connecting segment (22) is slidably connected to the interior of one end of the top beam (1). The first connecting segment (22) is provided with a first screw hole (221) at the end away from the bending segment (21). The first connecting segment (22) is provided with a first sliding groove (222) inside. The first connecting segment (22) is slidably connected to a first connecting plate (223) through the first sliding groove (222).

3. The trapezoidal canopy for small-section support of coal mine roadways according to claim 2, characterized in that: The second connecting section (23) has a second screw hole (231) at one end away from the bending section (21), and a second sliding groove (232) is provided inside the second connecting section (23). The first connecting section (22) is slidably connected to the second connecting plate (233) through the second sliding groove (232).

4. The trapezoidal canopy for small-section support of coal mine roadways according to claim 3, characterized in that: The second connecting segment (23) is slidably connected to the interior of the lower canopy leg (3) at the end away from the second support seat (302).

5. A trapezoidal canopy for small-section support of coal mine roadways according to claim 3, characterized in that: The second connecting segment (23) is threadedly connected to the third screw (303) through the second screw hole (231).

6. A trapezoidal canopy for small-section support of coal mine roadways according to claim 3, characterized in that: The end of the third screw (303) away from the second adjusting head (304) is rotatably connected to the second connecting plate (233).

7. A trapezoidal canopy for small-section support of coal mine roadways according to claim 2, characterized in that: The first connecting segment (22) is threaded to the first screw (104) through the first screw hole (221), and the end of the first screw (104) away from the connecting shaft (102) is rotatably connected to the first connecting plate (223).

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