Mining energy-absorbing column leg structure

Abstract

The embodiment of the invention provides a mining energy-absorbing column leg structure, and relates to the technical field of mining anti-impact supports, and the mining energy-absorbing column leg structure comprises a supporting box and a supporting assembly; the supporting assembly is arranged in the supporting box in the vertical direction, the top of the supporting assembly is connected with the bearing face of the top of the supporting box, and the bottom of the supporting assembly is connected with the inner bottom face of the supporting box. The middle layer of the supporting assembly in the vertical direction is a collapse compression interlayer, and honeycomb buffer layers are arranged at the upper end and the lower end of the collapse compression interlayer of the supporting assembly in the vertical direction correspondingly. A pre-folded wall body is arranged on the collapse compression interlayer in the horizontal direction. The embodiment of the invention is suitable for mining underground support occasions.

Description

Technical Field

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

[0002] The existing energy-absorbing structures on mine anti-rockburst supports usually achieve energy absorption of rockburst by compressing a cross-shaped energy-absorbing plate. This kind of energy-absorbing structure is relatively simple, resulting in insufficient anti-impact ability of the anti-rockburst support and unable to achieve good support ability. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to address the deficiencies in the above technologies and propose a mine energy-absorbing leg structure, aiming to solve the problem of existing mine support energy absorption.

[0004] The embodiments of the present invention provide a mine energy-absorbing leg structure, which includes a support box and a support component; the support component is arranged vertically in the support box, the top of the support component is connected to the receiving surface at the top of the support box, and the bottom of the support component is connected to the inner bottom surface of the support box; the middle layer of the support component in the vertical direction is a collapse compression interlayer, and the upper and lower ends of the support component in the vertical direction are honeycomb buffer layers respectively; pre-folded wall bodies are provided on the collapse compression interlayer.

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

[0006] In some embodiments, the cross-section of the collapse compression interlayer is a hexagonal structure, and the hexagonal structure is symmetric along its midline; the inner included angles a on the left and right sides of the hexagonal structure are 100° to 150°.

[0007] In some embodiments, collapse inner support components are provided in the collapse compression interlayer; the collapse inner support components are symmetric along the horizontal midline of the collapse compression interlayer.

[0008] In some embodiments, the collapsed inner support member includes diagonal supports, lateral supports, and an intermediate lateral main support; the lateral supports are arranged horizontally at the upper and lower ends of the collapsed compression sandwich layer, one end of the lateral support is fixedly connected to the left side wall inside the collapsed compression sandwich layer, and the other end of the lateral support is fixedly connected to the right side wall inside the collapsed compression sandwich layer; the intermediate lateral main support is arranged horizontally at the middle position of the collapsed compression sandwich layer, one end of the intermediate lateral main support is fixedly connected to the left side wall inside the collapsed compression sandwich layer, and the other end of the intermediate lateral main support is fixedly connected to the right side wall inside the collapsed compression sandwich layer; a plurality of diagonal supports are respectively arranged on the upper and lower sides of the intermediate lateral main support, and the diagonal supports on the same side are parallel to each other; one end of the diagonal support is fixedly connected to the inner side wall of the collapsed compression sandwich layer, and the other end of the diagonal support is fixedly connected to the intermediate lateral main support.

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

[0010] In some embodiments, the honeycomb buffer layer includes energy absorption boxes and honeycomb rib plates; the honeycomb rib plates are fixedly arranged inside the energy absorption boxes to form a honeycomb structure; the projection of each monomer of the honeycomb structure in the energy absorption box along the vertical direction is a hexagonal structure.

[0011] In some embodiments, the energy absorption boxes and the honeycomb rib plates 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.

[0012] In some embodiments, the collapsed inner support members are symmetric about the horizontal midline of the collapsed compression sandwich layer; the honeycomb buffer layers at the upper and lower ends of the collapsed compression sandwich layer are symmetric about the collapsed compression sandwich layer.

[0013] In some embodiments, the overall materials of the collapsed compression sandwich layer and the honeycomb buffer layer are both made of Q235 steel; the support box is a frustum of a pyramid structure.

[0014] During the use of the mine energy absorption column leg structure provided by the embodiment of the present invention, under the action of impact ground pressure, when being impacted above the roadway, the pre-folded wall body of the collapsed compression sandwich layer collapses and absorbs energy along the crease, which is the primary support. When entering the secondary support, the plastic deformation during the collapse of the upper and lower honeycomb buffer layers absorbs energy, improving the anti-impact ability of the anti-collision support. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further elaborates on the embodiments of the present invention in conjunction with the drawings and specific implementation manners.

[0016] The following will further illustrate the embodiments of the present invention in conjunction with the drawings: Figure 1It is a perspective view of the impact prevention support according to the embodiment of the present invention; Figure 2 It is a front view of the impact prevention support according to the embodiment of the present invention; Figure 3 It is a side view of the impact prevention support according to the embodiment of the present invention; Figure 4 It is a top view of the impact prevention support according to the embodiment of the present invention; Figure 5 It is a top view of the mine energy-absorbing column leg structure according to the embodiment of the present invention; Figure 6 It is a schematic diagram of the mine energy-absorbing column leg structure according to the embodiment of the present invention; Figure 7 It is a front view of the mine energy-absorbing column leg structure according to the embodiment of the present invention; Figure 8 It is the embodiment of the present invention Figure 7 Cross-sectional view along the B-B direction; Figure 9 It is the embodiment of the present invention Figure 7 Cross-sectional view along the C-C direction; Figure 10 It is a schematic diagram of the honeycomb absorption structure according to the embodiment of the present invention; Figure 11 It is a schematic diagram of the collapse compression sandwich structure according to the embodiment of the present invention.

[0017] In the figure: 1. Mine energy-absorbing column leg structure; 2. Support pillar; 3. Support crossbeam; 10. Support box, 20. Support component; 4. Honeycomb buffer layer; 41. First energy-absorbing box; 42. Second energy-absorbing box; 43. Honeycomb rib; 5. Collapse compression sandwich; 51. Sandwich board; 6. Collapse internal support component; 61. Oblique support; 62. Transverse support; 63. Intermediate transverse main support. Specific implementation manners

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clear and understandable, the following further details the embodiments of the present invention with reference to 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 used to limit the embodiments of the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined. The meaning of "several" is one or more unless otherwise specifically defined.

[0021] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0023] As shown in FIG. 1 and Figure 4 as shown, the embodiment of the present invention is applied to an impact ground pressure prevention support for a coal mine roadway. The impact ground pressure prevention support for the coal mine roadway includes an energy absorption column leg structure 1, a support column 2 disposed on the energy absorption column leg structure 1, and a support cross beam 3 connecting the support column 2.

[0024] Referring to Figure 5 as shown, the energy absorption column leg structure 1 for a mine provided by the embodiment of the present invention is a multi-stage energy absorption column leg structure for use at the bottom of an impact ground pressure prevention support (abbreviated as impact prevention support) for a coal mine roadway to bear pressure. The energy absorption column leg structure 1 includes a support box 10 and a support component 20; wherein, the support component 20 forms a multi-stage energy absorption structure. The support component 20 is disposed in the support box 10 in the vertical direction, and the top of the support component 20 is connected to the receiving surface at the top of the support box 10, while the bottom of the support component 20 is connected to the inner bottom surface of the support box 10 to form a support buffer structure. Specifically, the support component 20 includes an intermediate layer collapse compression sandwich layer 5 in the vertical direction, and the support component 20 is respectively a honeycomb buffer layer 4 at the upper end and the lower end of the collapse compression sandwich layer 5 in the vertical direction, that is, the honeycomb buffer layers 4 are symmetrically disposed at the upper end and the lower end of the collapse compression sandwich layer 5 respectively.

[0025] In the process of using the mine energy - absorbing column leg structure provided by the embodiment of the present invention, under the action of rock burst, when impacted from above the roadway, the pre - folded wall bodies of the collapsible compression interlayer collapse and absorb energy along the creases. This is the primary support. When entering the secondary support, the plastic deformation during the collapse of the upper and lower honeycomb buffer layers absorbs energy, improving the impact resistance of the anti - impact support.

[0026] In some embodiments, the support assembly 20 is an integral 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 with respect to the ground is 45°, with a value range of 30° - 60°.

[0027] The collapsible compression interlayer 5 includes pre - folded wall bodies 51 and 52, which form a preset bending structure. The inner side at the intersection position of the pre - folded wall bodies 51 and 52 forms a crease; the pre - folded wall bodies 51 and 52 can collapse towards the inside of the collapsible compression interlayer 5 when impacted to achieve pre - energy - absorbing support and reach the primary protection. The pre - folded wall bodies 51 and 52 are respectively sandwich structures, and there are closed cavities in the sandwich. Pressure gas (such as air with a pressure of 1.0 to 1.2 times the atmospheric pressure) can be pre - injected into the closed cavities to improve the collapse resistance of the pre - folded wall bodies 51 and 52.

[0028] As shown in FIGS. 5 to Figure 9 As shown, in some embodiments, the cross - section of the collapsible compression interlayer 5 in the vertical direction is a hexagonal structure, and the hexagonal structure is symmetric along its mid - line; the inner included angle a (i.e., the angle formed by the pre - folded wall bodies 51 and 52) on the left and right sides of the hexagonal structure is 100° to 150°, preferably designed to be 120°. With this angle design, the collapsible compression interlayer 5 can form better energy - absorbing protection during the primary support process and the force is more reasonable. The inner included angle a on the left and right sides of the hexagonal structure is the bending angle of the pre - folded wall bodies of the collapsible compression interlayer 5.

[0029] The initial wall thickness value B3 of a single wall body of the collapsible compression interlayer 5 is 8 mm, with a value range of 6 - 10 mm. The initial height h3 of the cavity formed inside the collapsible compression interlayer 5 is 86.60 mm, with a value range of 80 - 120 mm.

[0030] Furthermore, a collapse inner support member 6 is provided inside the collapsible compression interlayer 5 to provide a support force to resist the impact load. In the mine energy - absorbing column leg structure provided by the embodiment of the present invention, when under the action of rock burst and impacted from above the roadway, the pre - folded wall bodies of the collapsible compression interlayer collapse and absorb energy along the creases, and at the same time, the collapse inner support member inside the interlayer also provides a support force to resist the impact load.

[0031] As shown in FIGS. 5 to Figure 9As shown, in some embodiments, the collapse inner support member 6 includes an inclined support 61, a transverse support 62, and an intermediate transverse main support 63; wherein, the transverse support 62 is respectively disposed 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.

[0032] The intermediate transverse main support 63 is disposed at the middle position of the collapse compression interlayer 5 in the horizontal direction and is connected to the inclined support 61. A plurality of inclined supports 61 are respectively disposed on the upper and lower sides of the intermediate transverse main support 63. Among them, the inclined supports 61 on the same side are parallel to each other, and the distance between two adjacent inclined supports 61 on the same side is 13 - 16 mm, preferably 15 mm; further, the inclined support 61 is inclinedly disposed on the intermediate transverse main support 63, one end of the inclined support 61 is fixedly connected to the inner side wall of the collapse compression interlayer 5, and the other end of the inclined support 61 is fixedly connected to the intermediate transverse main support 63.

[0033] A core support portion is formed at the middle position of the intermediate transverse main support 63. The inclined support 61a and the inclined support 61b are located on the upper and lower sides of the intermediate transverse main support 63, parallel to each other and offset in position, which can guide the collapse of two opposite wall bodies of the collapse compression interlayer 5 while providing a certain support.

[0034] As shown in FIG. 11, in some embodiments, the collapse inner support member 6 is symmetric about the horizontal center line of the collapse compression interlayer 5. In this way, when impacted by the ground pressure in the vertical direction and when impacted above the roadway, the pre-folded wall body of the collapse compression interlayer can collapse and absorb energy along the crease.

[0035] As shown in FIGS. 5 to Figure 10 As shown, in some embodiments, the honeycomb buffer layer 4 includes an energy absorption box and honeycomb ribs 43. The honeycomb ribs 43 are fixedly disposed in the energy absorption box to form a honeycomb structure; the projection of each monomer of the honeycomb structure in the energy absorption box in the vertical direction is a hexagonal structure, preferably a regular hexagonal structure, which can achieve the best buffer energy absorption effect. The first energy absorption box 41 is at the upper end of the collapse compression interlayer 5, and the second energy absorption box 42 is at the lower end of the collapse compression interlayer 5.

[0036] As shown in FIGS. 5 to Figure 10 As shown, in some embodiments, the energy absorption box and the honeycomb ribs 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.

[0037] As shown in FIGS. 5 to Figure 10As shown, in some embodiments, the initial height h1 of the upper and lower honeycomb buffer layers 4 is 50 mm, and the value range is 50 - 150 mm; the initial wall thickness B1 of the honeycomb buffer layer 4 is 8 mm, and the value range is 6 - 10 mm. The initial thickness B4 of the honeycomb rib 43 is 3 mm, and the value range is 2 - 5 mm; the honeycomb cells of the honeycomb buffer layer 4 are regular hexagons, the side length L1 of the regular hexagon is 20 mm, and the value range is 15 - 30 mm. The height h2 of the regular hexagon is 50 mm. It should be noted that this height value should be the same as h1.

[0038] In some embodiments, the honeycomb buffer layer 4 has a hollow sealed structure. End caps are respectively provided at the top and bottom of the honeycomb buffer layer 4 for encapsulating the honeycomb structure to form a sealed space inside. The sealed space is filled with gas, which can be air, and the air pressure value can be 1.0 to 1.2 times the atmospheric pressure.

[0039] The inner cavity of the collapsible compression sandwich layer 5 communicates with the inner cavity of the honeycomb buffer layer 4 at its lower end. These two connected inner cavities form a sealed space filled with gas, which can be air, and the air pressure value can be 1.0 to 1.2 times the atmospheric pressure.

[0040] The honeycomb buffer layers 4 at the upper and lower ends of the collapsible compression sandwich layer 5 are symmetric about the collapsible compression sandwich layer 5, thereby forming a better energy absorption integral structure.

[0041] As shown in FIGS. 5 to Figure 9 As shown, in some embodiments, the overall materials of the collapsible compression sandwich layer 5 and the honeycomb buffer layer 4 are both made of Q235 steel, which can improve the energy absorption strength. The support box 10 is a frustum of a pyramid structure, which can prevent tipping over and has a better stress effect.

[0042] As shown in FIGS. 1 to Figure 9 As shown, the mine energy absorption column leg structure provided by the embodiment of the present invention can be connected to the support column 2 through the bearing surface at the top of its support box 10. Among them, the support column 2 and the energy absorption 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 to other support columns 2 through the support cross beam 3 to form an anti - impact support.

[0043] In the process of using the energy-absorbing column leg structure for mines provided by the embodiments of the present invention, under the action of rock burst, when impacted by the upper part of the roadway, the pre-folded wall body of the collapse compression interlayer collapses and absorbs energy along the crease. At the same time, the internal support in the interlayer also provides a supporting force to resist the impact load. The air inside the collapse compression interlayer and its lower support box is compressed to provide a supporting force for the upper structure. Under huge pressure, the collapse compression interlayer is first compressed to appear cracks until the interlayer is completely compacted. This is the first-level support. When entering the second-level support, the upper and lower support boxes and the plastic deformation during the collapse process of the honeycomb rib plates absorb energy to improve the impact resistance of the anti-impact support.

[0044] The above is only the preferred embodiment of the embodiments of the present invention, and does not impose any form of limitation on the embodiments of the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solutions of the embodiments of the present invention by using the above technical content, or modify them into equivalent embodiments with equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technical solutions of the embodiments of the present invention without departing from the content of the technical solutions of the embodiments of the present invention all belong to the protection scope of this technical solution.

Claims

1. A mine-use energy-absorbing column leg structure, characterized in that, The energy-absorbing column leg structure includes a support box (10) and a support component (20); the support component (20) is arranged vertically in the support box (10), the top of the support component (20) is connected to the receiving surface at the top of the support box (10), and the bottom of the support component (20) is connected to the inner bottom surface of the support box (10); the middle layer of the support component (20) in the vertical direction is a collapse compression interlayer (5), and the upper and lower ends of the support component (20) in the vertical direction on both sides of the collapse compression interlayer (5) are honeycomb buffer layers (4); a pre-folded wall body is provided on the collapse compression interlayer (5).

2. The energy-absorbing column leg structure for mining according to claim 1, wherein, 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) communicates with the inner cavity of the honeycomb buffer layer (4) at its lower end to form a sealed space, and the sealed space is filled with gas.

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

4. The energy-absorbing column leg structure for mining use according to any one of claims 1 to 3, characterized in that, A collapse inner support member (6) is provided in the collapse compression interlayer (5); the collapse inner support member (6) is symmetric along the horizontal center line of the collapse compression interlayer (5).

5. The energy-absorbing column leg structure for mining use according to claim 4, characterized in that, The collapse inner support member (6) includes an inclined support (61), a transverse support (62), and an intermediate transverse main support (63); the transverse support (62) is arranged horizontally at the upper and lower ends of the collapse compression interlayer (5), 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); the intermediate transverse main support (63) is arranged horizontally at the middle position of the collapse compression interlayer (5); a plurality of the inclined supports (61) are respectively arranged on the upper and lower sides of the intermediate transverse main support (63), and the inclined supports (61) on the same side are parallel to each other; one end of the inclined support (61) is fixedly connected to the inner side wall of the collapse compression interlayer (5), and the other end of the inclined support (61) is fixedly connected to the intermediate transverse main support (63).

6. The energy-absorbing column leg structure for mine use according to claim 4, wherein, The distance between two adjacent collapse inner support members (6) is 19 - 21 mm.

7. The energy-absorbing column leg structure for mine use according to claim 1, characterized in that, The honeycomb buffer layer (4) includes an energy-absorbing box and honeycomb rib plates (43); the honeycomb rib plates (43) are fixedly arranged in the energy-absorbing box to form a honeycomb structure; the projection of each monomer of the honeycomb structure in the energy-absorbing box in the vertical direction is a hexagonal structure.

8. The energy-absorbing column leg structure for mining according to claim 7, characterized in that, The energy-absorbing box and the honeycomb rib plates (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.

9. The energy-absorbing column leg structure for mining use according to claim 5, characterized in that, The collapsed internal support member (6) is symmetric along the horizontal center line of the collapsed compression interlayer (5); the honeycomb buffer layers (4) at the upper and lower ends of the collapsed compression interlayer (5) are symmetric with respect to the collapsed compression interlayer (5).

10. The energy-absorbing column leg structure for mining use according to claim 1, characterized in that The overall materials of the collapsed compression interlayer (5) and the honeycomb buffer layer (4) are both made of Q235 steel; the support box (10) is a frustum of a pyramid structure.

Images