Energy absorbing column leg structure for mining

Abstract

The embodiment of the present application provides a kind of mine energy-absorbing column leg structure, relate to mine anti-scour support technical field, the energy-absorbing column leg structure includes support box and supporting component;Supporting component is set in support box along vertical direction, the top of supporting component is connected with the receiving surface of support box top, the bottom of supporting component is connected with the inner bottom surface of support box;The middle layer of supporting component along vertical direction is collapse compression interlayer, the upper end and the lower end of collapse compression interlayer along vertical direction are respectively honeycomb buffer layer;Pre-folding wall body is provided on collapse compression interlayer along horizontal direction.The embodiment of the present application is applicable to the occasion of mine underground support.

Description

Technical Field

[0001] The embodiments of the present invention belong to the technical field of energy-absorbing column leg structures for mining, and particularly relate to an energy-absorbing column leg structure for mining. Background Art

[0002] The energy absorption structure on the existing mine anti-impact ground pressure support usually adopts the compression of cross-shaped energy absorption plates to absorb the energy of impact ground pressure. This energy absorption structure is relatively simple, which makes the anti-impact ground pressure support insufficient in impact resistance and cannot achieve good support capacity. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to address the deficiencies in the above-mentioned technologies and to propose an energy-absorbing column leg structure for mining, aiming to solve the energy absorption problem of existing mining supports.

[0004] An embodiment of the present invention provides an energy-absorbing column leg structure for mining, which includes a support box and a support assembly; the support assembly is arranged in the support box along the vertical direction, the top of the support assembly is connected to the receiving surface of the top of the support box, and the bottom of the support assembly is connected to the inner bottom surface of the support box; the middle layer of the support assembly along the vertical direction is a collapse compression interlayer, and the upper and lower ends of the collapse compression interlayer in the vertical direction of the support assembly are honeycomb buffer layers respectively; a pre-folded wall body is provided on the collapse compression interlayer.

[0005] In some embodiments, the collapsed compression interlayer and the honeycomb buffer layer are respectively hollow sealed structures; the inner cavity of the collapsed compression interlayer is connected to the inner cavity of the honeycomb buffer layer at its lower end to form a closed space, which is filled with gas.

[0006] In some embodiments, the cross-section of the collapsed compressed interlayer is a hexagonal structure, and the hexagonal structure is symmetrical along its centerline; the inner angle a between the left and right sides of the hexagonal structure is 100° to 150°.

[0007] In some embodiments, a collapsible inner support component is provided in the collapsible compression interlayer; the collapsible inner support component is symmetrical along the horizontal midline of the collapsible compression interlayer.

[0008] In some embodiments, the collapsed inner support component includes an oblique support, a transverse support and an intermediate transverse main support; the transverse support is arranged at the upper and lower ends of the collapsed compression interlayer along the horizontal direction, one end of the transverse support is fixedly connected to the left side wall of the collapsed compression interlayer, and the other end of the transverse support is fixedly connected to the right side wall of the collapsed compression interlayer; the intermediate transverse main support is arranged at the middle position of the collapsed compression interlayer along the horizontal direction, one end of the intermediate transverse main support is fixedly connected to the left side wall of the collapsed compression interlayer, and the other end of the intermediate transverse main support is fixedly connected to the right side wall of the collapsed compression interlayer; multiple oblique supports are respectively arranged on the upper and lower sides of the intermediate transverse main support, and the oblique supports on the same side are parallel to each other; one end of the oblique support is fixedly connected to the inner wall of the collapsed compression interlayer, and the other end of the oblique support is fixedly connected to the intermediate transverse main support.

[0009] In some embodiments, the distance between two adjacent collapsed inner support components is 19-21 mm.

[0010] In some embodiments, the honeycomb buffer layer includes an energy absorbing box and honeycomb ribs; the honeycomb ribs are fixedly disposed in the energy absorbing box to form a honeycomb structure; the projection of each cell of the honeycomb structure in the energy absorbing box along the vertical direction is a hexagonal structure.

[0011] In some embodiments, the energy absorption box and the honeycomb ribs have the same height; the hexagonal structure is a regular hexagonal structure; the side length L1 of the regular hexagonal structure is 15-30 mm; and the height h2 of the regular hexagonal structure is 50-150 mm.

[0012] In some embodiments, the collapsed inner support component is symmetrical along the horizontal centerline of the collapsed compression interlayer; and the honeycomb buffer layers at the upper and lower ends of the collapsed compression interlayer are symmetrical about the collapsed compression interlayer.

[0013] In some embodiments, the entire material of the collapse compression interlayer and the honeycomb buffer layer is Q235 steel; and the support box is a quadrangular pyramid structure.

[0014] The energy-absorbing column leg structure for mining provided by the embodiment of the present invention is subjected to impact ground pressure during use. When it is impacted from above the tunnel, the pre-folded wall of the collapsed compression interlayer collapses along the fold to absorb energy. This is the first-level support. When entering the second-level support, energy is absorbed through the plastic deformation of the upper and lower honeycomb buffer layers during the collapse process, thereby improving the impact resistance of the anti-impact support. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a three-dimensional diagram of an anti-collision support according to an embodiment of the present invention;

[0018] Figure 2 This is a front view of the anti-collision support according to an embodiment of the present invention;

[0019] Figure 3 This is a side view of an anti-collision support according to an embodiment of the present invention;

[0020] Figure 4 This is a top view of the anti-collision support according to an embodiment of the present invention;

[0021] Figure 5 This is a top view of the energy-absorbing column leg structure for mining according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the energy-absorbing column legs for mining according to an embodiment of the present invention;

[0023] Figure 7 This is a front view of the energy-absorbing column leg structure for mining according to an embodiment of the present invention;

[0024] Figure 8 For the embodiment of the present invention Figure 7 Cross-sectional view along direction BB;

[0025] Figure 9 For the embodiment of the present invention Figure 7 Cross-sectional view along CC direction;

[0026] Figure 10 This is a schematic diagram of a honeycomb suction structure according to an embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of the collapsed compression sandwich structure according to an embodiment of the present invention.

[0028] In the figure: 1. Energy-absorbing column leg structure for mining; 2. Pillar; 3. Support beam; 10. Support box; 20. Support assembly; 4. Honeycomb buffer layer; 41. First energy-absorbing box; 42. Second energy-absorbing box; 43. Honeycomb rib; 5. Collapse compression interlayer; 51. Interlayer plate; 6. Collapse inner support component; 61. Oblique support; 62. Horizontal support; 63. Middle horizontal main support. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention.

[0030] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0032] In the description of the embodiments of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0034] As shown in Figure 1 and Figure 4 As shown, an embodiment of the present invention is applied to an anti-impact ground pressure support for a coal mine tunnel. The anti-impact ground pressure support for a coal mine tunnel includes an energy-absorbing column leg structure 1, a support 2 arranged on the energy-absorbing column leg structure 1, and a supporting beam 3 connecting the support 2.

[0035] See Figure 5As shown, the energy-absorbing column leg structure 1 for mining provided in an embodiment of the present invention is a multi-stage energy-absorbing column leg structure for mining, which is applied to the bottom of anti-impact ground pressure supports (abbreviated as anti-impact supports) in coal mine tunnels to bear pressure. The energy-absorbing column leg structure 1 includes a support box 10 and a support assembly 20; wherein, the support assembly 20 forms a multi-stage energy-absorbing structure. The support assembly 20 is vertically arranged within the support box 10, and the top of the support assembly 20 is connected to the receiving surface at the top of the support box 10, while the bottom of the support assembly 20 is connected to the inner bottom surface of the support box 10 to form a support buffer structure. Specifically, the support assembly 20 includes a middle layer collapse compression interlayer 5 along the vertical direction, and the support assembly 20 has honeycomb buffer layers 4 at the upper and lower ends of the collapse compression interlayer 5 along the vertical direction. That is, the honeycomb buffer layers 4 are symmetrically arranged at the upper and lower ends of the collapse compression interlayer 5.

[0036] The energy-absorbing column leg structure for mining provided by the embodiment of the present invention is subjected to impact ground pressure during use. When it is impacted from above the tunnel, the pre-folded wall of the collapsed compression interlayer collapses along the fold to absorb energy. This is the first-level support. When entering the second-level support, energy is absorbed through the plastic deformation of the upper and lower honeycomb buffer layers during the collapse process, thereby improving the impact resistance of the anti-impact support.

[0037] In some embodiments, the support assembly 20 is an integrated structure. The height of the support box 10 should be the same as the height of the entire structure, and the inclination angle of the support box 10 to the ground is 45°, with a range of 30°-60°.

[0038] The collapse and compression interlayer 5 includes pre-folded walls 51 and 52, which form a pre-set curved structure. A crease is formed on the inner side of the intersection of the pre-folded walls 51 and 52. When impacted, the pre-folded walls 51 and 52 collapse toward the interior of the collapse and compression interlayer 5 to provide pre-energy absorption support, achieving first-level protection. The pre-folded walls 51 and 52 each form a sandwich structure with a closed cavity. This cavity can be pre-injected with pressurized gas (e.g., air at a pressure of 1.0 to 1.2 times atmospheric pressure) to enhance the collapse resistance of the pre-folded walls 51 and 52.

[0039] As shown in Figure 5 to Figure 9 As shown, in some embodiments, the collapse compression interlayer 5 has a hexagonal structure in a vertical cross-section, and the hexagonal structure is symmetrical along its midline. The inner angle a between the left and right sides of the hexagonal structure (i.e., the angle formed by the pre-folded walls 51 and 52) is 100° to 150°, preferably 120°. This angle design enables the collapse compression interlayer 5 to provide better energy absorption and protection during the primary support process, and the force is more reasonable. The inner angle a between the left and right sides of the hexagonal structure is the bending angle of the pre-folded wall of the collapse compression interlayer 5.

[0040] The initial value of the wall thickness of the single wall body of the collapse compression interlayer 5 is B3=8 mm, and the value range is 6-10 mm. The initial value of the cavity height inside the collapse compression interlayer 5 is h3=86.60 mm, and the value range is 80-120 mm.

[0041] Further, the collapse compression interlayer 5 is provided with a collapse inner support component 6 for providing support force against impact load. The mine energy absorption column leg structure provided by the embodiment of the present application can, when the impact ground pressure acts, collapse and absorb energy along the fold line of the pre-folded wall body of the collapse compression interlayer when impacted from above the roadway, and the collapse inner support component in the interlayer also provides support force against impact load.

[0042] As shown in FIGS. 5 to Figure 9 In some embodiments, the collapse inner support component 6 includes diagonal supports 61, transverse supports 62, and intermediate transverse main supports 63. The transverse supports 62 are respectively arranged at the upper end and the lower end of the collapse compression interlayer 5 in the horizontal direction. Specifically, one end of the transverse support 62 is fixedly connected to the left side wall in the collapse compression interlayer 5, and the other end of the transverse support 62 is fixedly connected to the right side wall in the collapse compression interlayer 5, forming a transverse buffer support structure.

[0043] The intermediate transverse main support 63 is arranged at the middle position of the collapse compression interlayer 5 in the horizontal direction and is connected to the diagonal support 61. A plurality of diagonal supports 61 are arranged on the upper and lower sides of the intermediate transverse main support 63, wherein the diagonal supports 61 on the same side are parallel to each other, and the spacing between the two adjacent diagonal supports 61 on the same side is 13-16 mm, preferably 15 mm. Further, the diagonal support 61 is arranged obliquely on the intermediate transverse main support 63, one end of the diagonal support 61 is fixedly connected to the inner side wall of the collapse compression interlayer 5, and the other end of the diagonal support 61 is fixedly connected to the intermediate transverse main support 63.

[0044] A core support part is formed at the middle position of the intermediate transverse main support 63. The diagonal support 61a and the diagonal support 61b are located on the upper and lower sides of the intermediate transverse main support 63, are parallel to each other and are staggered in position, and can guide the collapse of the two opposite wall bodies of the collapse compression interlayer 5 while providing certain support.

[0045] As shown in FIG. 11, in some embodiments, the collapse inner support component 6 is symmetrical along the horizontal center line of the collapse compression interlayer 5, so that when the vertical impact ground pressure acts, the collapse compression interlayer can collapse and absorb energy along the fold line of the pre-folded wall body when impacted from above the roadway.

[0046] As shown in FIGS. 5 to Figure 10As shown, in some embodiments, the honeycomb buffer layer 4 includes an energy absorption box and honeycomb ribs 43. The honeycomb ribs 43 are fixedly mounted within the energy absorption box to form a honeycomb structure. Each cell of the honeycomb structure projects vertically within the energy absorption box into a hexagonal structure, preferably a regular hexagonal structure, to achieve optimal buffering and energy absorption. The upper end of the collapse and compression interlayer 5 is a first energy absorption box 41, and the lower end of the collapse and compression interlayer 5 is a second energy absorption box 42.

[0047] As shown in Figure 5 to Figure 10 As shown, in some embodiments, the energy absorption box and the honeycomb rib 43 have the same height; the hexagonal structure is a regular hexagonal structure; the side length L1 of the regular hexagonal structure is 15-30 mm; the height h2 of the regular hexagonal structure is 50-150 mm, preferably 50 mm or 80 mm.

[0048] As shown in Figure 5 to Figure 10 As shown, in some embodiments, the height of the upper and lower honeycomb buffer layers 4 has an initial value h1 = 50 mm, with a range of 50-150 mm. The wall thickness of the honeycomb buffer layer 4 has an initial value B1 = 8 mm, with a range of 6-10 mm. The thickness of the honeycomb ribs 43 has an initial value B4 = 3 mm, with a range of 2-5 mm. The honeycomb cells of the honeycomb buffer layer 4 are regular hexagons, with a side length L1 = 20 mm, with a range of 15-30 mm. The height h2 = 50 mm, which should be the same as h1.

[0049] In some embodiments, the honeycomb buffer layer 4 comprises a hollow, sealed structure. End caps are provided at the top and bottom of the honeycomb buffer layer 4 to encapsulate the honeycomb structure, forming a sealed space within the honeycomb structure. The sealed space is filled with a gas, which may be air, at a pressure of 1.0 to 1.2 times atmospheric pressure.

[0050] The inner cavity of the collapsed compression interlayer 5 is connected to the inner cavity of the honeycomb buffer layer 4 at its lower end. The two connected inner cavities form a closed space filled with gas, which can be air, and the gas pressure can be 1.0 to 1.2 times the atmospheric pressure.

[0051] The honeycomb buffer layers 4 at the upper and lower ends of the collapsed compression interlayer 5 are symmetrical with respect to the collapsed compression interlayer 5, thereby forming a better energy-absorbing overall structure.

[0052] As shown in Figure 5 to Figure 9 As shown, in some embodiments, the collapse compression interlayer 5 and the honeycomb buffer layer 4 are made of Q235 steel, which can improve the energy absorption strength. The support box 10 is a quadrangular pyramid structure, which can prevent rollover and has a better force-bearing effect.

[0053] As shown in Figure 1 to Figure 9As shown, the mine energy-absorbing column leg structure provided by the embodiment of the present application can be connected with the support box 10 top receiving surface and the support column 2, wherein the support column 2 and the energy-absorbing box in the support box 10 are located on the same vertical axis to form a force support. The support column 2 can be connected with other support columns 2 through the support beam 3 to form a anti-impact support.

[0054] In use, under the action of impact pressure, when impacted by the impact from above the roadway, the pre-folded wall of the collapsed compression interlayer collapses along the fold line to absorb energy, and the support in the interlayer also provides support force to resist the impact load. The collapsed compression interlayer and the air inside the support box at its lower end are compressed to provide support force to the upper structure. Under great pressure, the collapsed compression interlayer is first compressed to crack until the interlayer is completely compacted, thus providing primary support. When entering secondary support, the plastic deformation of the upper and lower support boxes and the honeycomb ribbed plate during the collapse process absorbs energy, improving the impact resistance of the anti-impact support.

[0055] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any person skilled in the art can make many possible changes and modifications to the technical content of the above-described technical solution of the present application without departing from the scope of the technical solution of the present application, or modify it into equivalent embodiments of equivalent changes. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical content of the present application, which does not deviate from the technical solution of the present application, is within the scope of protection of the present application.

Claims

1. A mining energy-absorbing column leg structure, characterized in that: The energy-absorbing column leg structure comprises a support box (10) and a support assembly (20); the support assembly (20) is arranged in the support box (10) along the vertical direction, the top of the support assembly (20) is connected to the receiving surface of the top of the support box (10), and the bottom of the support assembly (20) is connected to the inner bottom surface of the support box (10); the middle layer of the support assembly (20) along the vertical direction is a collapse compression interlayer (5), and the upper and lower ends of the collapse compression interlayer (5) of the support assembly (20) along the vertical direction are honeycomb buffer layers (4); a pre-folded wall body is provided on the collapse compression interlayer (5); When the energy-absorbing column leg structure for mining is subjected to impact from above, the collapse and compression interlayer (5) collapses and absorbs energy along the folds of the pre-folded wall body, which is a first-level support. When entering the second-level support, the energy is absorbed by the plastic deformation of the honeycomb buffer layer (4) at the upper and lower ends of the collapse and compression interlayer (5) during the collapse process. The support assembly (20) is an integrated structure, and the collapse compression interlayer (5) and the honeycomb buffer layer (4) are respectively hollow sealed structures; the inner cavity of the collapse compression interlayer (5) is connected to the inner cavity of the honeycomb buffer layer (4) at its lower end, and a closed space is formed, and the closed space is filled with pressurized gas; A vertically arranged collapse inner support component (6) is provided in the collapse compression interlayer (5); the collapse inner support component (6) includes an oblique support (61), a transverse support (62) and an intermediate transverse main support (63); the transverse support (62) is arranged at the upper end and the lower end of the collapse compression interlayer (5) in the horizontal direction, one end of the transverse support (62) is fixedly connected to the left side wall of the collapse compression interlayer (5), and the other end of the transverse support (62) is fixedly connected to the right side wall of the collapse compression interlayer (5); the intermediate transverse main support (63) is arranged at the upper end and the lower end of the collapse compression interlayer (5) in the horizontal direction. Middle position; a plurality of the oblique supports (61) are respectively arranged on the upper and lower sides of the middle transverse main support (63), and the oblique supports (61) on the same side are parallel to each other; one end of the oblique support (61) is fixedly connected to the inner wall of the collapse compression interlayer (5), and the other end of the oblique support (61) is fixedly connected to the middle transverse main support (63); the oblique support (61) includes: oblique support 1 and oblique support 2, and the oblique support 1 and oblique support 2 are located on the upper and lower sides of the middle transverse main support (63) and are staggered in position to guide the collapse of the two opposite walls of the collapse compression interlayer (5); The collapse compression interlayer (5) comprises a pre-folded wall body 1 and a pre-folded wall body 2, wherein the pre-folded wall body 1 and the pre-folded wall body 2 are respectively interlayer structures, wherein the interlayer has a closed cavity, and pressurized gas is injected into the closed cavity to improve the collapse resistance of the pre-folded wall body 1 and the pre-folded wall body 2.

2. The energy-absorbing column leg structure for mining according to claim 1, characterized in that: The cross section of the collapsed compression interlayer (5) is a hexagonal structure, and the hexagonal structure is symmetrical along its center line; the inner angle a between the left and right sides of the hexagonal structure is 100° to 150°.

3. The energy-absorbing column leg structure for mining according to any one of claims 1 to 2, characterized in that: The collapsed inner support component (6) is symmetrical along the horizontal midline of the collapsed compression interlayer (5).

4. The energy-absorbing column leg structure for mining according to claim 3, characterized in that: The distance between two adjacent collapsed inner support components (6) is 19-21 mm.

5. The energy-absorbing column leg structure for mining according to claim 1, characterized in that: The honeycomb buffer layer (4) comprises an energy absorption box and honeycomb ribs (43); the honeycomb ribs (43) are fixedly arranged in the energy absorption box to form a honeycomb structure; the projection of each cell of the honeycomb structure in the energy absorption box along the vertical direction is a hexagonal structure.

6. The energy-absorbing column leg structure for mining according to claim 5, characterized in that: The energy absorption box and the honeycomb rib plate (43) have the same height; the hexagonal structure is a regular hexagonal structure; the side length L1 of the regular hexagonal structure is 15-30 mm; and the height h2 of the regular hexagonal structure is 50-150 mm.

7. The energy-absorbing column leg structure for mining according to claim 1, characterized in that: The collapsed inner support component (6) is symmetrical along the horizontal midline of the collapsed compression interlayer (5); and the honeycomb buffer layers (4) at the upper and lower ends of the collapsed compression interlayer (5) are symmetrical about the collapsed compression interlayer (5).

8. The energy-absorbing column leg structure for mining according to claim 1, characterized in that: The overall material of the collapse compression interlayer (5) and the honeycomb buffer layer (4) is Q235 steel; the support box (10) is a quadrangular pyramid structure.

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