A lateral flexible support portal support device

Abstract

The present invention provides a lateral flexible support portal support device, on which the lateral protection structure consists of a flexible connector, a baffle and an anchor rod, which can provide good protection for the tunnel support when it receives horizontal impact caused by impact ground pressure; the horizontal impact is first buffered by the baffle plate for the first time, while preventing rocks and the like brought by the impact ground pressure from being blocked, and preventing the rocks from directly rushing toward the hydraulic cylinder from the horizontal direction and causing damage to the hydraulic cylinder; then the anchor rod transmits the horizontal impact received by the baffle plate to the flexible connector, and the flexible connector buffers the horizontal impact for the second time and converts the horizontal impact load into a vertical impact load, while the vertical impact load is offset by the hydraulic cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine tunnel protection, and in particular to a lateral flexible support portal bracket device. Background Art

[0002] Rock burst, also known as rock burst, refers to the phenomenon of sudden destruction in the open rock mass in deep underground mining or areas with high tectonic stress. It often occurs in places such as mine caves and coal mine tunnels. The reason for the occurrence is that the strain energy accumulated in the open rock mass is suddenly and violently released, causing the rock mass to undergo brittle fracture like an explosion. Rock burst causes a large amount of rock to collapse and produces horizontal and vertical impacts, which can not only destroy the mine, but also endanger the workers in the mine. At present, in order to cope with rock burst in coal mine tunnels, supports or trusses are often used with hydraulic cylinders.

[0003] Support structures for dealing with rock burst can be found in Chinese patents 2011204557336 and 202020976270.7. Both patents propose support structures for supporting coal mine tunnels, but their disadvantage is that they can only deal with the vertical impact caused by rock burst but not the horizontal impact. When they are subjected to the horizontal impact of rock burst, they cannot cope with it, and the consequence may cause the support structure to break laterally. Some support structures have also proposed structures for dealing with the horizontal impact of rock burst, such as Chinese patent 202022130230.3, which sets a baffle on the classic support structure, but the baffle cannot completely protect against the impact in the horizontal direction, and the baffle is rigidly connected, which is a typical hard-to-hard collision when facing the horizontal impact. Such direct impact will not only cause damage to the support structure, but also is not conducive to long-term use. Therefore, it is necessary to propose a new structure or improve the support for rock burst. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and to provide a lateral flexible supporting portal bracket device.

[0005] The technical solution of the present invention is: a lateral flexible support portal support device, characterized in that it includes a top support, a base, a side support hydraulic cylinder connected to both ends of the base and the top support, and a lateral protection structure installed at the upper and lower ends of the side support hydraulic cylinder;

[0006] The lateral protection structure includes two vertical long flexible connectors arranged on both sides of the edge supporting hydraulic cylinder, the upper and lower ends of the flexible connector are respectively connected to the upper and lower ends of the edge supporting hydraulic cylinder, and several groups of protection components are vertically arranged on the flexible connector. The protection components include two anchor rods and baffles connected between the outer ends of the anchor rods, and the inner ends of the two anchor rods are respectively connected to the flexible connectors; the baffles of the upper and lower adjacent protection components are connected by connecting rings.

[0007] Preferably, the top bracket is formed by two identical arc-shaped frames hinged along the middle; the base includes a fixed seat located in the middle and two side seats symmetrically hinged on both sides of the fixed seat, and there is a middle hydraulic cylinder on the fixed seat, the upper end of the middle hydraulic cylinder is hinged to the middle of the top bracket, the lower part of the side support hydraulic cylinder is connected to the outer end of the side seat, and the upper end of the side support hydraulic cylinder is hinged to the outer end of the arc frame.

[0008] Preferably, the top end of the flexible connector is connected to the hinged part of the arc frame and the edge support hydraulic cylinder, and the bottom end of the flexible connector is connected to the part of the side seat connected to the edge support hydraulic cylinder through a pin shaft; the two flexible connectors of each lateral protection structure are located on both sides of the edge support hydraulic cylinder, the anchor rod of each lateral protection structure points horizontally to the outside of the edge support hydraulic cylinder, and the baffle of each lateral protection structure is located on the outside of the edge support hydraulic cylinder.

[0009] Preferably, the feature is that the flexible connecting member is a steel wire rope or a chain.

[0010] Preferably, the connection points at the upper and lower ends of the flexible connector and the upper and lower end points of the edge support hydraulic cylinder are located on the same straight line.

[0011] Preferably, the baffle of each lateral protection structure is an arc-shaped plate of the same tile shape, the axial direction of the arc-shaped plate is parallel to the axis of the edge supporting hydraulic cylinder, and three connecting rings are provided in the middle and both sides of the edges of the upper and lower adjacent arc-shaped plates.

[0012] Preferably, the anchor rod is in the shape of a plate, with one end provided with a circular through hole connected to the baffle, and the other end provided with a connecting hole connected to the flexible connector.

[0013] The beneficial effects of the present invention are as follows: 1. A lateral flexible support portal support device of the present invention, wherein the lateral protection structure thereon is composed of a flexible connector, a baffle and an anchor rod, which can provide good protection for the tunnel support when it is subjected to horizontal impact caused by impact ground pressure; the horizontal impact is first buffered by the baffle plate for the first time, and at the same time, rocks and the like caused by the impact ground pressure are prevented from being blocked, so as to prevent the rocks from directly rushing toward the hydraulic cylinder from the horizontal direction and causing damage to the hydraulic cylinder; then the anchor rod transmits the horizontal impact received by the baffle plate to the flexible connector, and the horizontal impact received by the baffle plate can be transmitted to the flexible connector, and the flexible connector buffers the horizontal impact for the second time and converts the horizontal impact load into a vertical impact load, and the vertical impact load is offset by the vertical support force of the edge support hydraulic cylinder, thereby realizing the conversion from lateral impact to vertical load, protecting the edge support hydraulic cylinder while utilizing the characteristics of the hydraulic cylinder;

[0014] 2. The baffle is a tile-shaped arc baffle that can improve the baffle's own impact resistance, and the upper and lower parts are connected into one by a connecting ring to diffuse the lateral impact, thereby protecting the baffle itself.

[0015] 3. The deformation process of the flexible connector itself can also play a certain buffering effect. At the same time, the flexible connector can convert the lateral impact load into a vertical load along the axis direction of the edge supporting hydraulic cylinder. The vertical load is then absorbed by the elastic deformation of the hydraulic oil inside the hydraulic cylinder, thereby reducing or eliminating the adverse effects of lateral impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a stereogram of the present invention;

[0017] Figure 2 It is a front view of the present invention;

[0018] Figure 3 yes Figure 2 Left view of

[0019] Figure 4 yes Figure 2 A top view of

[0020] Figure 5 yes Figure 1 The enlarged view of point a in the middle;

[0021] Figure 6 yes Figure 2 Middle AA section view;

[0022] Figure 7 yes Figure 4 Middle BB section view;

[0023] In the figure: 1. lateral protection structure, 10. flexible connector, 11. baffle, 12. anchor rod, 121. circular through hole, 122. connecting hole, 13. connecting ring, 2. top bracket, 21. arc frame, 3. base, 31. fixed seat, 32. side seat, 41. middle hydraulic cylinder, 42. side support hydraulic cylinder, 5. protective shell, 6. pin shaft. DETAILED DESCRIPTION

[0024] Example 1: See Figure 1-7, a lateral flexible support portal support structure in the figure includes a top support, a base, a side support hydraulic cylinder connected to the base and both ends of the top support, and a lateral protection structure installed at the upper and lower ends of the side support hydraulic cylinder; the support body is composed of a top support, a base and a hydraulic cylinder, which is a commonly used structure for supports in coal mine tunnels. It can be seen from patents 2011204557336, 202020976270.7, 202022130230.3, etc. The top support is used to support the top of the coal mine tunnel, and the hydraulic cylinder provides support force to prevent accidents caused by tunnel collapse. Its structure is relatively classic.

[0025] The lateral protection structure includes two vertical long flexible connectors arranged on both sides of the edge supporting hydraulic cylinder, the upper and lower ends of the flexible connector are respectively connected to the upper and lower ends of the edge supporting hydraulic cylinder, and several groups of protection components are vertically arranged on the flexible connector. The protection components include two anchor rods and baffles connected between the outer ends of the anchor rods, and the inner ends of the two anchor rods are respectively connected to the flexible connectors; the baffles of the upper and lower adjacent protection components are connected by connecting rings.

[0026] The baffle is used to directly face the impact and protect the edge support hydraulic cylinder to prevent it from being damaged. Adjacent baffles are connected as a whole through connecting rings. When the baffle is subjected to horizontal impact, the baffle connected by the connecting ring can buffer the horizontal impact, and at the same time block large coal blocks or rocks in the coal mine tunnel to prevent them from colliding with the hydraulic cylinder. Compared with the traditional lateral protection design, the lateral protection of the present invention is a flexible structure, which can perform load conversion when receiving horizontal impact, not only has good protection effect, but also has a long service life.

[0027] The top end of the flexible connector is connected to the hinged part of the edge support hydraulic cylinder on the arc frame, and the bottom end of the flexible connector is connected to the part of the side seat connected to the edge support hydraulic cylinder through a pin shaft; the two flexible connectors of each lateral protection structure are located on both sides of the edge support hydraulic cylinder, the anchor rod of each lateral protection structure is horizontally pointed to the outside of the edge support hydraulic cylinder, and the baffle of each lateral protection structure is located on the outside of the edge support hydraulic cylinder. The flexible connector is a steel wire rope or a chain. In this embodiment, a chain is selected.

[0028] The flexible connector mainly converts horizontal loads into vertical loads. It can buffer the horizontal impact on the bracket and convert horizontal loads into vertical loads.

[0029] The connection points of the upper and lower ends of the flexible connector are located on the same straight line as the upper and lower end points of the edge support hydraulic cylinder. In this way, the vertical load on the flexible connector can be more accurately applied to the axial direction of the edge support hydraulic cylinder, and the pressure resistance characteristics of the hydraulic cylinder can be brought into play to a greater extent.

[0030] The baffle of each lateral protection structure is a tile-shaped arc plate of the same shape, the axial direction of the arc plate is parallel to the axis of the edge support hydraulic cylinder, and three connecting rings are provided in the middle and both sides of the edges of the upper and lower adjacent arc plates, so that on the one hand, the arched structure of the arc plate itself can enhance the ability to resist lateral impact, and on the other hand, the connection between adjacent arc plates can also quickly disperse the lateral impact of a certain part to the adjacent arc plates, so as to achieve better buffering effect. The baffle is a circular arc plate; the circular arc plate can protect a large area from horizontal impacts in different directions.

[0031] The anchor rod is plate-shaped, with a circular through hole at one end connected to the baffle and a connecting hole at the other end connected to the flexible connector. The anchor rod can transfer the horizontal impact of the baffle to the flexible connector, so that the flexible connector converts the horizontal impact load into a vertical impact load.

[0032] The fixing seat and the seats on both sides are provided with a protective shell, which is used to protect the hydraulic cylinder base and is also convenient for the maintenance of the hydraulic cylinder.

[0033] The working principle and use method of the device are as follows: the various components of the present invention are transported to the coal mine tunnel, and the bracket main body, i.e. the top bracket, the base and the hydraulic cylinder are installed first. During the installation process, the extension length and the force of the hydraulic cylinder are adjusted according to the height of the tunnel and the actual situation of the rock layer; then the lateral protection structure is installed, and the device can be put into operation after installation.

[0034] When rock burst occurs in a coal mine tunnel, the vertical impact of the rock burst is directly offset by the hydraulic cylinder and the top support; the horizontal impact of the rock burst is first blocked by the baffle, which plays the first buffering role, and at the same time prevents rocks brought by the rock burst from being blocked, and prevents rocks from directly rushing toward the hydraulic cylinder from the horizontal direction and causing damage to the hydraulic cylinder; then the anchor rod transfers the horizontal impact received by the baffle to the flexible connector, and the anchor rod, the baffle and the flexible connector are rotatable, and the horizontal impact received by the baffle can be transferred to the flexible connector, and the flexible connector performs a second buffering on the horizontal impact and converts the horizontal impact load into a vertical impact load, which is still offset by the hydraulic cylinder; compared with the traditional structure, the lateral protection structure of the present invention can not only provide horizontal protection to the support body, but also maximize the advantages of the hydraulic cylinder.

Claims

1. A lateral flexible support portal support device, characterized in that: It includes a top bracket, a base, a side support hydraulic cylinder connected to both ends of the base and the top bracket, and a lateral protection structure installed at the upper and lower ends of the side support hydraulic cylinder; The lateral protection structure includes two vertical long strip-shaped flexible connectors arranged on both sides of the edge support hydraulic cylinder, the upper and lower ends of the flexible connector are respectively connected to the upper and lower ends of the edge support hydraulic cylinder, and a plurality of groups of protection components are vertically arranged on the flexible connector, the protection components include two anchor rods and baffles connected between the outer ends of the anchor rods, and the inner ends of the two anchor rods are respectively connected to the flexible connector; the baffles of the upper and lower adjacent protection components are connected by connecting rings; The top bracket is formed by two identical arc-shaped frames hinged along the middle; the base includes a fixed seat located in the middle and two side seats symmetrically hinged on both sides of the fixed seat, the fixed seat is provided with a middle hydraulic cylinder, the upper end of the middle hydraulic cylinder is hinged to the middle of the top bracket, the lower part of the side support hydraulic cylinder is connected to the outer end of the side seat, and the upper end of the side support hydraulic cylinder is hinged to the outer end of the arc frame; The top end of the flexible connector is connected to the hinged part of the arc frame and the edge support hydraulic cylinder, and the bottom end of the flexible connector is connected to the part of the side seat connected to the edge support hydraulic cylinder through a pin shaft; the two flexible connectors of each lateral protection structure are located on both sides of the edge support hydraulic cylinder, the anchor rod of each lateral protection structure points horizontally to the outside of the edge support hydraulic cylinder, and the baffle of each lateral protection structure is located on the outside of the edge support hydraulic cylinder.

2. A lateral flexible support portal support device according to claim 1, characterized in that: The flexible connecting piece is a steel wire rope or a chain.

3. A lateral flexible support portal support device according to claim 1, characterized in that: The connection points at the upper and lower ends of the flexible connector and the upper and lower end points of the edge support hydraulic cylinder are located on the same straight line.

4. A lateral flexible support portal support device according to claim 1, characterized in that: The baffle of each lateral protection structure is a tile-shaped arc plate of the same shape, the axis direction of the arc plate is parallel to the axis of the edge supporting hydraulic cylinder, and three connecting rings are provided in the middle and both sides of the edges of the upper and lower adjacent arc plates.

5. The lateral flexible support portal support device according to claim 1, characterized in that: The anchor rod is in the shape of a plate, one end of which is provided with a circular through hole connected to the baffle, and the other end of which is provided with a connecting hole connected to the flexible connecting piece.

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