An assembled arch support structure and assembly method for mine tunnels

Abstract

The present invention discloses an assembled arch support structure for a mine tunnel, which is characterized in that: it includes a steel arch and an invert arch. The steel arch includes multiple segments of steel arch segments. There are joints between adjacent steel arch segments and between the steel arch segments and the invert arch, and joint connectors are provided at the joints; the joint connectors include a trough-shaped part and a plug plate; the plug plate is vertically fixed in the middle of the trough-shaped part and inserted into the joint; the trough-shaped part includes a middle bottom part and side parts on both sides; the middle bottom part is located on the inner circle of the adjacent steel arch segments; the side parts are in a straight state in the first state and are located on both sides of the steel arch segments; at least one side part is bent inward in the second state to form a bent locking part, which is locked and fixed with the steel arch segments. The present invention can effectively enhance the stability of the joints, cooperate with the mechanized assembly construction of the arch, reduce the on-site construction processes, improve the construction safety, and shorten the construction period.

Description

Technical Field

[0001] The present invention belongs to the field of mine tunnel support construction, and particularly relates to an assembled arch support structure for mine tunnels and an assembly method thereof. Background Art

[0002] In recent years, with the continuous development of the economy and the continuous application of high and new technologies, tunnel and underground engineering in China has developed rapidly unprecedentedly. As one of the main support schemes for mine tunnels, the problems of the strength and construction efficiency of steel arch support have become increasingly prominent year by year, restricting the further development of underground engineering construction.

[0003] Currently, the arch support still adopts the traditional manual installation method, and the joints are connected by welding or bolts. There are disadvantages such as high labor intensity, low construction efficiency, and poor safety. In order to meet the various requirements of the development of underground engineering construction and adapt to the trend of mechanized construction, the mechanized assembly construction of the arch is a major development trend, and further optimization research in this regard is urgently needed. Summary of the Invention

[0004] In view of at least one of the above defects or improvement requirements in the prior art, the present invention provides an assembled arch support structure for mine tunnels, which can effectively strengthen the joint stability, cooperate with the mechanized assembly construction of the arch, reduce the on-site construction procedures, improve the construction safety, and shorten the construction period.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an assembled arch support structure for mine tunnels, characterized in that:

[0006] It includes a steel arch and an invert arch. The steel arch includes multiple steel arch segments. There are joints between adjacent steel arch segments and between the steel arch segments and the invert arch. A joint connecting member is provided at the joint.

[0007] The joint connecting member includes a trough-shaped part and an insertion plate;

[0008] The insertion plate is vertically fixed in the middle of the trough-shaped part and inserted into the joint;

[0009] The trough-shaped part includes a middle bottom part and side parts on both sides;

[0010] The middle bottom part is located inside the adjacent steel arch segments;

[0011] The side parts are in a straight state in the first state and are located on both sides of the steel arch segment; at least one side of the side parts is bent inward in the second state to form a bent locking part, which is locked and fixed with the steel arch segment.

[0012] In one preferred embodiment, in the joint, the insertion plate and the steel arch frame segments on both sides are in interference fit.

[0013] In one preferred embodiment, both of the side portions on both sides have bent locking portions in the second state.

[0014] In one preferred embodiment, the steel arch frame segment is an I-beam.

[0015] In one preferred embodiment, the trough-shaped portion is a channel steel, and the bent locking portion locks the I-beam flange of the steel arch frame segment.

[0016] In one preferred embodiment, the steel arch frame segment is a circular ring steel pipe.

[0017] In one preferred embodiment, the trough-shaped portion is a channel steel, and the bent locking portion hoop-bands the circular ring steel pipe of the steel arch frame segment.

[0018] In one preferred embodiment, the range where the trough-shaped portion hoop-bands the circular ring steel pipe of the steel arch frame segment is greater than 180°.

[0019] In one preferred embodiment, the invert arch at the lower part has the same structure as the steel arch frame segment.

[0020] To achieve the above object, according to another aspect of the present invention, there is also provided an assembling method for the assembled arch support structure for a mine tunnel as described above, which is characterized by including the following steps:

[0021] S1. Perform a force analysis according to the size of the tunnel, and determine the type, size and number of segments of the steel arch frame;

[0022] S2. Use the robotic arm on the mobile platform to erect the steel arch frame segments, bring two adjacent steel arch frame segments close to each other, reserve a joint, and use the robotic arm to wedge the insertion plate of the joint connector into the interference joint;

[0023] S3. Then use the robotic arm to bend the side portions of the joint connector inward towards the steel arch frame segment to form bent locking portions to lock and fix the steel arch frame segment, so that the two steel arch frame segments can be firmly connected at the joint.

[0024] The above preferred technical features can be combined with each other as long as they do not conflict with each other.

[0025] Generally speaking, compared with the prior art, the above technical solutions conceived by the present invention have the following beneficial effects:

[0026] 1. The assembled arch support structure for mine tunnels of the present invention can effectively enhance the stability of joints, cooperate with the mechanized assembly construction of arch frames, reduce on-site construction processes, improve construction safety, and shorten the construction period.

[0027] 2. The assembled arch support structure for mine tunnels of the present invention adopts an assembled structure form. A steel arch frame is divided into 4 to 8 segments, and the joint connectors that can be buckled at the joints are used for connection, replacing welding or bolts. The installation is simple and has high safety, improving efficiency and saving time, reducing dependence on labor, and being more conducive to realizing mechanized automatic installation.

[0028] 3. In the current steel arch support structures in mine tunnels, manual installation and fixation are mostly used at the joints. Whether it is welding or bolt connection, they both have the disadvantages of poor safety performance and low construction efficiency. The present invention can effectively solve these problems. By adopting an assembled steel arch frame and connecting the joint connectors that can be buckled for each segment of the arch frame, the human factor is reduced, construction safety and efficiency are improved, and it has broad application prospects.

[0029] 4. The assembled arch support structure for mine tunnels of the present invention can effectively solve the problems such as the cumbersome installation and low efficiency of steel arch frames in mine tunnels, and the low safety performance at the joints. Cooperating with mechanized construction, it reduces the occurrence of safety accidents and has significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the overall structural schematic diagram of the assembled arch support structure for mine tunnels according to the embodiment of the present invention;

[0031] Figure 2 is the schematic diagram of the joint seam of two segments of the steel arch frame of the assembled arch support structure for mine tunnels according to the embodiment of the present invention before connection;

[0032] Figure 3 is the three-dimensional schematic diagram of the joint connector of the assembled arch support structure for mine tunnels according to the embodiment of the present invention;

[0033] Figure 4 is the axonometric view of the joint connector of the assembled arch support structure for mine tunnels according to the embodiment of the present invention in the first state;

[0034] Figure 5 is the schematic diagram of two segments of the steel arch frame of the assembled arch support structure for mine tunnels according to the embodiment of the present invention in the first state;

[0035] Figure 6 is the schematic axonometric view of the joint connector of the assembled arch support structure for mine tunnels according to the embodiment of the present invention in the second state. DETAILED DESCRIPTION OF THE INVENTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be further described in detail below with reference to the specific embodiments.

[0037] As a preferred embodiment of the present invention, as Figures 1-6 shown, the present invention provides an assembled arch support structure for a mine tunnel, including a steel arch and an invert 4, as Figures 1-2 shown, the steel arch includes multiple steel arch segments 1, and there are joints 2 between adjacent steel arch segments 1 and between the steel arch segments 1 and the invert 4, and joint connectors 3 are provided at the joints 2.

[0038] As Figure 3 shown, the joint connector 3 includes a channel-shaped part 31 and a plug plate 32; the plug plate 32 is vertically fixed in the middle of the channel-shaped part 31 and is inserted into the joint 2. The channel-shaped part 31 includes a middle bottom part 311 and side edge parts 312 on both sides; the middle bottom part 311 is located inside the inner circle of the adjacent steel arch segments 1.

[0039] As Figures 4-5 shown, the side edge parts 312 are in a straight state in the first state and are located on both sides of the steel arch segments 1.

[0040] As Figure 6 shown, at least one side of the side edge parts 312 is bent inward in the second state to form a bent locking part 313, which is locked and fixed with the steel arch segments 1.

[0041] In one of the preferred embodiments, in the joint 2, the plug plate 32 and the steel arch segments 1 on both sides are in an interference fit.

[0042] In one of the preferred embodiments, both side edge parts 312 on both sides have bent locking parts 313 in the second state.

[0043] In one of the preferred embodiments, the steel arch segments 1 are I-beams.

[0044] In one of the preferred embodiments, the channel-shaped part 31 is a channel steel, and the bent locking part 313 locks the I-beam flanges of the steel arch segments 1.

[0045] In one of the preferred embodiments, the steel arch segments 1 are circular steel pipes.

[0046] In one preferred embodiment, the trough-shaped part 31 is a channel steel, and the bent locking part 313 clamps the circular steel pipe of the steel arch frame segment 1.

[0047] In one preferred embodiment, the range where the trough-shaped part 31 clamps the circular steel pipe of the steel arch frame segment 1 is greater than 180°.

[0048] In one preferred embodiment, the inverted arch 4 at the lower part has the same structure as the steel arch frame segment 1.

[0049] The present invention also provides an assembly method for the assembled arch support structure for mine tunnels as described above, including the following steps:

[0050] S1. Conduct a force analysis according to the size of the tunnel, determine the type, size and number of segments of the steel arch frame; generally, I-beams can be selected, or channel steels or circular steel pipes can also be selected, and the steel arch frame ring segments are prefabricated by a factory.

[0051] S2. Generally, the arch frame can be divided into 4 to 8 segments. Use the robotic arm on the mobile platform to erect the steel arch frame segment 1, bring two adjacent steel arch frame segments 1 close to each other, reserve the joint 2, and use the robotic arm to wedge the insertion plate 32 of the joint connector 3 into the interference joint 2.

[0052] S3. Then use the robotic arm to bend the side part 312 of the joint connector 3 inward towards the steel arch frame segment 1 to form a bent locking part 313 to lock and fix the steel arch frame segment 1, so that the two steel arch frame segments can be firmly connected at the joint 2.

[0053] Preferably, it further includes step S4. At some soft ground layers, grouting reinforcement measures for the initial support can also be coordinated, and grouting reinforcement is carried out in weak sections to further enhance the integrity and stability of a set of steel frames.

[0054] Among them, the joint connector 3 is a prefabricated product, and its shape and size should be adapted to those of the steel arch frame, and it is required to wrap the periphery of the arch frame.

[0055] In summary, compared with the prior art, the solution of the present invention has the following remarkable advantages:

[0056] Generally speaking, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0057] 1. The assembled arch support structure for mine tunnels of the present invention can effectively enhance the joint stability, cooperate with the mechanized assembly construction of the arch frame, reduce the on-site construction procedures, improve the construction safety, and shorten the construction period.

[0058] 2. The assembled arch support structure for mine tunnels of the present invention adopts an assembled structure form. A steel arch is divided into 4 to 8 segments, and joint connectors that can be buckled are used for connection at the joints, replacing welding or bolts. The installation is simple and highly safe, improving efficiency and saving time, reducing the dependence on labor, and being more conducive to realizing mechanized automatic installation.

[0059] 3. At present, for the steel arch support structure in mine tunnels, manual installation and fixation are mostly carried out at the joints. Whether it is welding or bolt connection, both have the disadvantages of poor safety performance and low construction efficiency. The present invention can effectively solve these problems. By adopting an assembled steel arch and connecting the joint connectors that can be buckled for each segment of the arch, the human factor is reduced, and the construction safety and efficiency are improved, with broad application prospects.

[0060] 4. The assembled arch support structure for mine tunnels of the present invention can effectively solve problems such as the cumbersome and inefficient installation of steel arches in mine tunnels and the low safety performance at the joints. Cooperating with mechanized construction, it reduces the occurrence of safety accidents and has significant economic benefits.

[0061] It can be understood that the embodiments of the system described above are merely illustrative. The units described as separate components may or may not be physically separated, and may be located in one place or distributed to different network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0062] In addition, those skilled in the art should understand that in the application documents of the embodiments of the present invention, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0063] In the description of the embodiments of the present invention, a large number of specific details are set forth. However, it should be understood that the embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure the understanding of this description. Similarly, it should be understood that, in order to streamline the disclosure of the present invention and assist in understanding one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof.

[0064] However, the disclosed methods should not be construed as reflecting an intention that the claimed embodiments of the present invention require more features than are expressly recited in each claim. Rather, as the claims reflect, the inventive aspects lie in less than all of the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into that detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled arch support structure for a mine tunnel, characterized in that: It includes a steel arch and an invert arch (4). The steel arch includes multiple steel arch segments (1). There are joints (2) between adjacent steel arch segments (1) and between the steel arch segments (1) and the invert arch (4). A joint connector (3) is provided at the joint (2). The joint connector (3) is a prefabricated product, and its shape and size are adapted to those of the steel arch; The joint connector (3) includes a trough-shaped part (31) and a plug plate (32); The plug plate (32) is vertically fixed in the middle of the trough-shaped part (31) and inserted into the joint (2); In the joint (2), the plug plate (32) has an interference fit with the steel arch segments (1) on both sides; The trough-shaped part (31) includes a middle bottom part (311) and side parts (312) on both sides; The middle bottom part (311) is located inside the inner circle of adjacent steel arch segments (1); The side parts (312) are in a straight state in the first state and are located on both sides of the steel arch segment (1). The side parts (312) on both sides are bent inward in the second state to form a bent locking part (313) and are locked and fixed with the steel arch segment (1).

2. The assembled arch support structure for a mine tunnel according to claim 1, characterized in that: The steel arch segment (1) is an I-beam.

3. The assembled arch support structure for a mine tunnel according to claim 2, characterized in that: The trough-shaped part (31) is a channel steel, and the bent locking part (313) locks the I-beam flange of the steel arch segment (1).

4. The assembled arch support structure for a mine tunnel according to claim 1, characterized in that: The steel arch segment (1) is a circular steel pipe.

5. The assembled arch support structure for a mine tunnel according to claim 4, characterized in that: The trough-shaped part (31) is a channel steel, and the bent locking part (313) clamps the circular steel pipe of the steel arch segment (1).

6. The assembled arch support structure for a mine tunnel according to claim 5, characterized in that: The range where the trough-shaped part (31) clamps the circular steel pipe of the steel arch segment (1) is greater than 180°.

7. The assembled arch support structure for a mine tunnel according to claim 1, characterized in that: The lower invert arch (4) has the same structure as the steel arch segment (1).

8. An assembling method for an assembled arch support structure for a mine tunnel according to any one of claims 1-7, characterized in that, It includes the following steps: S1. Conduct a force analysis according to the size of the tunnel to determine the type, size, and number of segments of the steel arch; S2. Use the robotic arm on the mobile platform to erect the steel arch segment (1), bring two adjacent steel arch segments (1) closer to each other, reserve the joint (2), and use the robotic arm to wedge the plug plate (32) of the joint connector (3) into the interference joint (2); S3. Then, use the robotic arm to bend the side part (312) of the joint connector (3) inward towards the steel arch frame segment (1) to form a bent locking part (313) for locking and fixing the steel arch frame segment (1), so that the two steel arch frame segments can be firmly connected at the joint (2).

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