Novel anchor cable steel beam

Abstract

The invention relates to the technical field of coal mine safety support, and provides a novel anchor cable steel beam which comprises a pair of first connecting plates, a plurality of anchor cable holes are formed in the first connecting plates in the length direction of the first connecting plates, a plurality of first bending structures are arranged on the first connecting plates in the width direction of the first connecting plates, and the first bending structures are distributed on the two sides of the anchor cable holes; a plurality of second bending structures are continuously arranged on the second connecting plates in the length direction of the second connecting plates, and the second connecting plates and the first connecting plates are connected with each other to define a box girder structure with a rectangular section; due to the existence of the closed box girder section, the flexural capacity of the whole novel anchor cable steel girder is greatly improved compared with traditional channel steel, flat steel, U-shaped steel, I-shaped steel and the like, the virtual material distribution of the bending structure is improved compared with a straight web component, and the flexural capacity of the bending structure is also greatly improved; deformation of the top plate can be effectively reduced, and therefore safe production of a coal mine is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine safety support, in particular to a novel anchor cable steel beam. Background Art

[0002] Coal is an important global energy source and the main energy source of China. With the increasing depletion of shallow resources, many mining projects are gradually expanding to deeper areas. In recent years, underground projects have been extended to deeper areas at a rate of 10 to 25 meters per year; the existing tunnel support system includes anchor rods, anchor cables, and steel belt combined support. However, with the increase in mining depth, under the action of high ground stress and the influence of complex stress fields in deep strata, the stability and support of the tunnel roof face many challenges, and are prone to damage or overall failure, resulting in excessive deformation of the coal rock roof and other problems, which seriously threatens the mining of deep coal resources.

[0003] In this context, the anchor beam support form is increasingly showing its advantages. The anchor beam support structure is a combined support form composed of steel support beams and anchor rods (cables). Commonly used steel support beams include channel steel, flat steel, U-shaped steel, I-beam, etc. Under the action of the anchor preload, the steel support beam and the rock strata within the anchor support range produce a compression zone to form a whole, thereby enhancing the stability of the surrounding rock.

[0004] However, U-shaped steel, I-beam, etc. form linear contact with the surrounding rock when in use, resulting in a small protected surface area, poor support force transmission and diffusion effect, heavy deadweight, and relatively high support cost. Summary of the invention

[0005] The invention provides a novel anchor cable steel beam, which is used to solve the problems of small protective surface area, large deadweight and limited bending bearing capacity of medium-sized steel supporting beams in the prior art.

[0006] The present invention provides a novel anchor cable steel beam, comprising: A pair of first connecting plates, wherein the first connecting plates are provided with a plurality of anchor cable holes along the length direction thereof, and the first connecting plates are provided with a plurality of first bending structures along the width direction thereof, and the first bending structures are distributed on both sides of the anchor cable holes; A pair of second connecting plates, wherein a plurality of second bending structures are continuously arranged on the second connecting plates along the length direction thereof, and the second connecting plates are connected to the first connecting plates to form a box beam structure with a rectangular cross section.

[0007] According to the novel anchor cable steel beam provided by the present invention, at least two first bending structures are provided, and the two first bending structures are symmetrically distributed on both sides of the anchor cable hole.

[0008] According to the novel anchor cable steel beam provided by the present invention, a plurality of the second bending structures are formed on the second connecting plate in a continuous bending shape.

[0009] According to the new anchor cable steel beam provided by the present invention, the second connecting plate is connected to the first connecting plate by welding.

[0010] According to the novel anchor cable steel beam provided by the present invention, the first bending structure is a V-shaped groove or an arc-shaped groove.

[0011] According to the novel anchor cable steel beam provided by the present invention, the second bending structure is a V-shaped groove, an arc-shaped groove or a trapezoidal groove.

[0012] According to the novel anchor cable steel beam provided by the present invention, the height h of the second bending structure is 35-50 mm.

[0013] According to the novel anchor cable steel beam provided by the present invention, the width b of the second bending structure is 70-150 mm.

[0014] According to the new anchor cable steel beam provided by the present invention, the width of the first connecting plate is 340-360 mm.

[0015] According to the new anchor cable steel beam provided by the present invention, the thickness d of the first connecting plate and the second connecting plate are both 3-10 mm.

[0016] A novel anchor steel beam provided by the present invention comprises a pair of first connecting plates and a pair of second connecting plates, wherein the first connecting plate is provided with a plurality of anchor holes along its length direction, and the first connecting plate is provided with a plurality of first bending structures along its width direction, and the first bending structures are distributed on both sides of the anchor holes; the second connecting plate is continuously provided with a plurality of second bending structures along its length direction, and the second connecting plate and the first connecting plate are connected to each other to form a box beam structure with a rectangular cross section; the present invention connects the second connecting plate and the first connecting plate to each other to form a box beam structure with a rectangular cross section, and arranges the first bending structures on both sides of the anchor holes on the first connecting plate, and the second connecting plate is continuously provided with a plurality of second bending structures along its length direction, because the sealing The existence of the closed box girder section greatly improves the bending bearing capacity of the entire new anchor steel beam compared with traditional channel steel, flat steel, U-shaped steel, I-beam, etc., and the second connecting plate improves its own "virtual" material distribution relative to the straight web member by setting a second bending structure, that is, it is equivalent to adding some material distribution effects in the thickness direction relative to the flat plate on the basis of the original flat plate. These "virtual" material distributions increase the effective moment of inertia of the cross-section and greatly improve its bending bearing capacity. When subjected to the squeezing effect of the tunnel roof, the new anchor steel beam can effectively reduce the deformation of the roof by relying on its own high cross-sectional stiffness, thereby effectively ensuring the safe production of the coal mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the overall structure of a new type of anchor cable steel beam provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a first connecting plate provided in an embodiment of the present invention; Figure 3 One of the structural schematic diagrams of the second connecting plate provided in an embodiment of the present invention; Figure 4 A second structural schematic diagram of a second connecting plate provided in an embodiment of the present invention; Figure 5 A third structural schematic diagram of a second connecting plate provided in an embodiment of the present invention; Figure 6 One of the top views of the second connecting plate provided in the embodiment of the present invention; Figure 7 A second top view of the second connecting plate provided in an embodiment of the present invention; Figure 8 A third top view of the second connecting plate provided in an embodiment of the present invention.

[0019] Reference numerals: 1. first connecting plate; 11. anchor cable hole; 12. first bending structure; 2. A second connecting plate; 21. A second bending structure. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] Combine the following Figure 1-Figure 8 A new type of anchor cable steel beam of the present invention is described.

[0023] An embodiment of the present invention provides a new type of anchor steel beam, including: a pair of first connecting plates 1 and a pair of second connecting plates 2, the second connecting plates 2 and the first connecting plates 1 are connected to each other to form a box beam structure with a rectangular cross-section, that is, the ends of the pair of first connecting plates 1 and the pair of second connecting plates 2 are vertically connected to each other, for example, the pair of first connecting plates 1 are arranged in parallel and spaced apart, and the pair of second connecting plates 2 are vertically connected between the pair of first connecting plates 1 and play a supporting and connecting role, thereby forming a box beam structure with a rectangular cross-section.

[0024] Among them, the first connecting plate 1 is provided with multiple anchor holes 11 along its length direction, which is conducive to passing the anchor cable to fix the new anchor steel beam to the external structure; the first connecting plate 1 is provided with multiple first bending structures 12 along its width direction, and the first bending structures 12 are distributed on both sides of the anchor hole 11; the second connecting plate 2 is provided with multiple second bending structures 21 along its length direction.

[0025] With such an arrangement, due to the existence of the closed box beam cross-section, the bending bearing capacity of the entire new anchor cable steel beam is greatly improved compared with traditional channel steel, flat steel, U-shaped steel, I-shaped steel, etc. The multiple first bending structures 12 on the first connecting plate 1 significantly improve the ability of the steel beam to resist bending deformation, and the second bending structure 21 on the second connecting plate 2 also enhances the rigidity of the steel beam. These bending structures increase the "virtual" material distribution, that is, it is equivalent to adding some material distribution effects relative to the thickness direction of the flat plate on the basis of the original flat plate. These "virtual" material distributions increase the effective moment of inertia of the cross-section, especially in the direction perpendicular to the first connecting plate 1, which helps to resist the effect of lateral force; in addition, by arranging multiple anchor cable holes 11 on the first connecting plate 1, it is convenient to install the anchor cable, and multi-point fixation between the steel beam and external structures such as coal body, rock, etc. can be achieved, which helps to evenly disperse the external force, thereby improving the stability and bearing capacity of the entire structure.

[0026] like Figure 1-Figure 2 As shown, in this embodiment, a pair of first connecting plates 1 include a first upper connecting plate and a first lower connecting plate, the first upper connecting plate is arranged in parallel above the first lower connecting plate, a pair of second connecting plates 2 are arranged between the first upper connecting plate and the first lower connecting plate, and play a supporting and connecting role, a pair of second connecting plates 2 include a second left connecting plate and a second right connecting plate, the top ends of the second left connecting plate and the second right connecting plate are respectively vertically connected to the two ends of the first upper connecting plate, and the bottom ends of the second left connecting plate and the second right connecting plate are respectively vertically connected to the two ends of the first lower connecting plate, that is, the second left connecting plate and the second right connecting plate are fixed in the space between the first upper connecting plate and the first lower connecting plate by welding the upper and lower ends, thereby forming a box beam structure with a rectangular cross-section.

[0027] Preferably, the connecting plates are made of high-strength steel, and by setting a bending structure, the "virtual" material distribution is increased compared to the traditional straight plate. It has the characteristics of high rigidity and large surface protection area, which can effectively improve the diffusion range of the anchor cable preload force and the bending bearing capacity of the new anchor cable steel beam, and solve the problem of instability in the plane that is prone to traditional channel steel, flat steel, U-shaped steel, I-beam, etc.

[0028] Optionally, at least two first bending structures 12 are provided, and the two first bending structures 12 are symmetrically distributed on both sides of the anchor hole 11. This symmetrical layout can ensure that the deformation of the steel beam under the action of external force is more uniform, avoid local stress concentration, and thus improve the overall bending resistance; and will not affect the passage of the anchor.

[0029] Specifically, the two first bending structures 12 are symmetrically distributed on both sides of the anchor hole 11. This layout can ensure that the external force is evenly distributed in the width direction, avoiding the problem of local stress concentration. When the external force acts on the steel beam, the first bending structures 12 on both sides will share the load, avoiding the situation where one side is subjected to excessive force. This helps to reduce fatigue damage of the material and extend the service life of the steel beam. In addition, the symmetrical layout of the first bending structures 12 makes inspection and maintenance work more convenient, and potential problems can be more easily discovered and dealt with.

[0030] Preferably, the first bending structures 12 are symmetrically distributed on both sides of the anchor cable hole 11, and a certain distance is maintained between the two to ensure that the anchor cable can smoothly pass through the anchor cable hole 11. This design not only does not affect the installation and use of the anchor cable, but also can cooperate with the use of the existing anchor cable tray to provide additional support and enhance the structural strength around the anchor cable hole 11. The shape and size of the anchor cable hole 11 can be adjusted according to actual needs to accommodate anchor cables of different diameters and types.

[0031] In this embodiment, the first bending structure 12 and the second bending structure 21 increase the "virtual" material distribution of the material, improve the local stiffness, and significantly improve the bending resistance of the area, ensuring that the steel beam is not prone to bending and deformation when subjected to a large external force; the first bending structure 12 and the second bending structure 21 can be pre-processed in the factory to ensure consistency in size and shape, facilitating rapid installation on site. This prefabricated design can improve construction efficiency and reduce the time and cost of on-site processing.

[0032] like Figure 1-Figure 2 As shown, the first bending structure 12 is a V-shaped groove or an arc groove, the openings of which are all facing the same direction, such as the openings facing upward, and the size is determined according to actual needs. In this way, the bending structure helps to increase the "virtual" material distribution of the material and improve the local stiffness. The design of the V-shaped groove can increase the cross-sectional area, while the arc groove can better disperse the stress and reduce the risk of fatigue damage.

[0033] It should be noted that the first bending structure 12 includes but is not limited to a V-shaped groove and an arc-shaped groove, and other shapes that can achieve the above-mentioned effects are within the protection scope.

[0034] Optionally, a plurality of second bending structures 21 are formed on the second connecting plate 2 in a continuous bending shape, such as Figure 3-Figure 5 As shown, the second bending structure 21 includes but is not limited to a wavy V-shaped groove, an arc groove or a trapezoidal groove. For example, the cross-sectional waveform of the second connecting plate 2 is a sine waveform, and the size is determined according to actual needs.

[0035] Optionally, the thickness d of the first connecting plate 1 and the second connecting plate 2 is 3-10 mm, the width of the first connecting plate 1 is 340-360 mm, the height h of the second bending structure is 35-50 mm, and the width b of the second bending structure is 70-150 mm.

[0036] In some embodiments, Figure 6 As shown, the thickness d of the second connecting plate 2 is 5 mm, the second bending structure 21 is a V-shaped groove, the width b of the V-shaped groove is 87.5 mm, the height h is 36 mm, and the included angle is an obtuse angle.

[0037] In some embodiments, Figure 7 As shown, the thickness d of the second connecting plate 2 is 3 mm, the second bending structure 21 is a trapezoidal groove, the bottom width of the trapezoidal groove is 57 mm, the height h is 43 mm, and the bending part is an arc transition.

[0038] In some embodiments, Figure 8As shown, the thickness d of the second connecting plate 2 is 3 mm, the cross section of the second bending structure 21 is a sine wave with an arc groove, and the distance between the wave crest and the wave trough is 75 mm, that is, the length of a complete wave is 150 mm, and the height h is 48 mm.

[0039] The installation process of a new type of anchor steel beam provided in this embodiment is as follows: the first upper connecting plate is arranged in parallel above the first lower connecting plate, and a pair of second connecting plates 2 are arranged between the first upper connecting plate and the first lower connecting plate to play a supporting and connecting role. The top ends of the second left connecting plate and the second right connecting plate are respectively vertically connected to the two ends of the first upper connecting plate, and the bottom ends of the second left connecting plate and the second right connecting plate are respectively vertically connected to the two ends of the first lower connecting plate. The second left connecting plate and the second right connecting plate are fixed in the space between the first upper connecting plate and the first lower connecting plate by welding the upper and lower ends, thereby forming a box beam structure with a rectangular cross-section, and the anchor cable is passed through the anchor cable holes 11 reserved on the first upper connecting plate and the first lower connecting plate, and anchored and installed in conjunction with the anchor cable tray.

[0040] By adjusting the size, position, number and shape of the bending structure of the first connecting plate 1 and the second connecting plate 2, a customized design can be made according to actual engineering needs to meet the application requirements of different scenarios; the first connecting plate 1 and the second connecting plate 2 rely on their own high-strength steel materials and increased "virtual" material distribution to improve the diffusion range of the anchor preload and the bending bearing capacity of the new anchor steel beam, avoiding the instability of traditional channel steel, flat steel, U-shaped steel, I-beam, etc. that are prone to in-plane instability. The second connecting plate 2 improves its own "virtual" material distribution through the corrugated second bending structure 21, and its bending bearing capacity is greatly improved compared to ordinary straight web members. When subjected to the squeezing effect of the tunnel roof, the new anchor steel beam relies on its own high cross-sectional stiffness to effectively reduce the deformation of the roof, thereby effectively ensuring the safe production of the coal mine.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of anchor cable steel beam, characterized in that: include: A pair of first connecting plates (1), wherein the first connecting plates (1) are provided with a plurality of anchor cable holes (11) along their length direction, and the first connecting plates (1) are provided with a plurality of first bending structures (12) along their width direction, and the first bending structures (12) are distributed on both sides of the anchor cable holes (11); A pair of second connecting plates (2), wherein the second connecting plates (2) are provided with a plurality of second bending structures (21) along the length direction thereof, and the second connecting plates (2) and the first connecting plates (1) are connected to each other to form a box beam structure with a rectangular cross section.

2. The new anchor cable steel beam according to claim 1 is characterized in that: At least two of the first bending structures (12) are provided, and the two first bending structures (12) are symmetrically distributed on both sides of the anchor cable hole (11).

3. The new anchor cable steel beam according to claim 1 is characterized in that: A plurality of the second bending structures (21) are formed on the second connecting plate (2) in a continuously bent shape.

4. The new anchor cable steel beam according to claim 1 is characterized in that: The second connecting plate (2) is connected to the first connecting plate (1) by welding.

5. The new anchor cable steel beam according to claim 2 is characterized in that: The first bending structure (12) is a V-shaped groove or an arc-shaped groove.

6. The new anchor cable steel beam according to claim 3 is characterized in that: The second bending structure (21) is a V-shaped groove, an arc-shaped groove or a trapezoidal groove.

7. The new anchor cable steel beam according to claim 6 is characterized in that: The height h of the second bending structure (21) is 35-50 mm.

8. The new anchor cable steel beam according to claim 6 is characterized in that: The width b of the second bending structure (21) is 70-150 mm.

9. The new anchor cable steel beam according to claim 1 is characterized in that: The width of the first connecting plate (1) is 340-360 mm.

10. The new anchor cable steel beam according to claim 1 is characterized in that: The thickness d of the first connecting plate (1) and the second connecting plate (2) are both 3-10 mm.

Images