Support structure for controlling the deformation of the corner of a roadway

Abstract

The utility model discloses a kind of supporting structure for controlling roadway help angle deformation, belong to roadway surrounding rock control technical field, including L-type tray, L-type steel band and cable-stayed rod, the L-type steel band is arranged at the help angle of roadway, the multiple L-type trays are evenly connected on L-type steel band, the L-type tray is connected in roadway by anchor rod, the cable-stayed rod is connected on L-type steel band by the connecting ring on steel band and the hook of both ends of cable-stayed rod;The included angle of the L-type tray, the included angle of L-type steel band and the angle at the help angle of roadway are same, the included angle of the L-type tray is the included angle between both sides of L-type steel band, the angle at the help angle of roadway is the included angle between the top of help of roadway and the side of roadway;By designing the way of L-type tray, L-type steel band and cable-stayed rod cooperation support roadway help angle to control roadway help angle deformation, can effectively improve the stress concentration problem at help angle, and can solve the problem that anchor rod anchor cable support at help angle is difficult to construction or help angle support is missing.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel surrounding rock control technology, specifically referring to a support structure for controlling the deformation of tunnel sidewalls. Background Technology

[0002] As excavation progresses, the stress in the surrounding rock of a roadway redistributes, leading to significant stress concentration at the roadway corners. The roadway roof is typically rock, while the sidewalls are coal, resulting in drastically different lithologies. Consequently, the surrounding rock structure at the corners is relatively fragile, making its stability crucial. Corners are generally straight-line angles, where stress concentration is high, making them highly susceptible to severe deformation and damage. When the strength of the corner surrounding rock falls below the stress concentration level, deformation and damage occur. If this deformation is not controlled effectively and promptly, it will extend to the roof, sidewalls, and floor, ultimately causing roadway instability phenomena such as roof falls, side spalling, and severe floor heave, seriously impacting safe production in the coal mine.

[0003] Currently, coal mine roadways commonly use bolt and cable anchors for support, neglecting the control of the surrounding rock at the roadway corners. Existing technology often uses straight-line angles at roadway corners, making it difficult to install bolts and cables there. Therefore, only small angles are used, resulting in insufficient support strength at the corners. Furthermore, the inappropriate support methods at the roadway corners lead to inadequate support strength or even complete absence of support. These methods fail to control surrounding rock deformation, causing severe expansion deformation or shear failure of the surrounding rock at the corners, frequently resulting in large-area breakage of bolts and cables at the corners. Utility Model Content

[0004] In order to overcome some of the problems mentioned in the background, this utility model provides a support structure for controlling the deformation of roadway corners, so as to at least partially solve the above problems.

[0005] According to the technical solution of this utility model, a support structure for controlling the deformation of the roadway corner is provided, including multiple L-shaped trays, L-shaped steel strips and multiple diagonal tie rods. The L-shaped steel strips are set at the corners of the roadway. The multiple tray assemblies are evenly connected to the L-shaped steel strips. The tray assemblies are connected to the roadway through anchor bolts. The multiple diagonal tie rods are connected to the L-shaped steel strips through connecting rings on the steel strips and hooks at both ends of the diagonal tie rods.

[0006] The included angle of the L-shaped pallet, the included angle of the L-shaped steel strip, and the angle at the corner of the tunnel are the same. The included angle of the L-shaped pallet is the included angle between the two sides of the L-shaped steel strip, and the angle at the corner of the tunnel is the included angle between the top of the tunnel and the side of the tunnel.

[0007] Preferably, the L-shaped pallet includes a horizontal pallet and a vertical pallet. The horizontal pallet has a horizontal through hole, through which the anchor bolt is fixedly connected to the side of the roadway. The vertical pallet has a vertical through hole, through which the anchor bolt is fixedly connected to the side of the roadway.

[0008] Preferably, the distance between the horizontal through hole and the end of the horizontal tray away from the vertical tray is 100-500mm, the distance between the vertical through hole and the end of the vertical tray away from the horizontal tray is 100-500mm, and the thickness of the horizontal tray and the vertical tray is 3-15mm.

[0009] Preferably, the radii of the vertical and horizontal through holes are 1.5 to 3 times the radius of the anchor rod.

[0010] Preferably, diagonal tie rods are inserted between the vertical and horizontal steel strips of the L-shaped steel strip, and three diagonal tie rods are evenly connected between every two L-shaped trays.

[0011] Preferably, connecting rings are welded to both the vertical and horizontal steel strips of the L-shaped steel strip.

[0012] Preferably, each end of the diagonal tie rod has a hook, which is connected to the steel strip via a connecting ring on the L-shaped steel strip.

[0013] Preferably, the width of the two sides of the L-shaped steel strip is 30-300mm, and the thickness of the L-shaped steel strip is 3-15mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model supports the roadway corner by designing an L-shaped tray, an L-shaped steel strip and a diagonal tie rod to control the deformation of the roadway corner. It can effectively improve the stress concentration problem at the corner and solve the problems of difficult construction of anchor bolt and anchor cable support or lack of corner support.

[0016] This utility model uses L-shaped trays, L-shaped steel strips, and diagonal tie rods in combination to form a load-bearing body between the sidewall and the corner, creating continuous support. This achieves the goal of protecting both the sidewall and the roof, effectively solving the technical problem of "large initial deformation of the surrounding rock at the roadway sidewall and corner, and easy breakage of the sidewall and corner anchor bolts and cables." Compared with traditional support processes, this method uses less material to achieve a safer support effect, improving safety while saving support costs. Attached Figure Description

[0017] Figure 1 These are three views of the L-shaped tray of the present invention;

[0018] Figure 2 This is a 3D schematic diagram of the installation of the present invention in a tunnel;

[0019] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0020] In the figure, R is the radius of the anchor hole of the "L-shaped tray"; L is the length of the "L-shaped tray"; W is the width of the "L-shaped tray"; and H is the thickness of the "L-shaped tray".

[0021] 1-Roof of the tunnel; 2-Side of the tunnel; 3-Corner of the tunnel; 4-L-shaped tray; 5-Rack anchor; 6-Top anchor; 7-L-shaped steel strip; 8-Connecting ring; 9-Diagonal tie rod. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0023] This utility model embodiment provides a support structure for controlling the deformation of the roadway corner, including multiple L-shaped trays 4 and L-shaped steel strips 7. The L-shaped steel strips 7 are set at the corner 3 of the roadway, and the multiple L-shaped trays 4 are evenly connected to the L-shaped steel strips 7. The L-shaped trays 4 are connected to the roadway by anchor bolts, and the multiple diagonal tie rods 9 are connected to the L-shaped steel strips 7 by connecting rings 8 on the steel strips and hooks at both ends of the diagonal tie rods.

[0024] The included angle of the L-shaped pallet 4, the included angle of the L-shaped steel strip 7, and the angle at the side corner 3 of the aisle are the same. The included angle of the L-shaped steel strip 7 is the included angle between the two sides of the L-shaped steel strip 7, and the angle at the side corner 3 of the aisle is the included angle between the top 1 of the aisle and the side 2 of the aisle.

[0025] In a further embodiment of this example, the L-shaped pallet includes a horizontal pallet and a vertical pallet. The horizontal steel strip is provided with a horizontal through hole, and the anchor rod is fixedly connected to the horizontal pallet at the position of the roadway roof 1 through the horizontal through hole. The vertical pallet is provided with a vertical through hole, and the anchor rod is fixedly connected to the vertical pallet on the side 2 of the roadway through the vertical through hole.

[0026] In a further embodiment of this example, the distance between the transverse through hole and the end of the transverse steel strip furthest from the vertical tray is 100-500mm, the distance between the vertical through hole and the end of the vertical steel strip furthest from the transverse tray is 100-500mm, and the thickness of the transverse tray and the vertical tray is 3-15mm.

[0027] In a further embodiment of this example, the radii of the vertical through hole and the horizontal through hole are 1.5-3 times the radius of the anchor rod.

[0028] In a further embodiment of this example, the width of the two sides of the L-shaped steel strip 7 is 30-300mm, and the thickness of the L-shaped steel strip 7 is 3-15mm.

[0029] It should be noted that: such as Figures 1-3 As shown, the dimensions of the L-shaped tray 4 are within a certain range. Its length L = distance from the anchor rod to the side (or top) + (100~500) mm, width W ranges from 50 to 400 mm, thickness H ranges from 3 to 15 mm, and the radius of the anchor rod hole R is between 1.5 and 3 times the radius of the anchor rod. The side width of the L-shaped steel strip is in the range of 30 to 300 mm, and the thickness is in the range of 3 to 15 mm.

[0030] The cross-section of a tunnel is generally rectangular or trapezoidal; this embodiment uses a rectangular cross-section as an example. Figure 2 As shown, the key parts of the roadway support are the roadway corners 3, followed by the roadway roof 1, and finally the roadway sides 2. Here, we take a single side as an example for support, and the specific steps are as follows:

[0031] like Figure 2 As shown, first use the "L-shaped tray" in conjunction with the anchor rod to fix one side of the L-shaped steel strip, then fix the other side, and finally fix the middle part.

[0032] When installing an "L-shaped tray", such as Figure 3 As shown, the top should be anchored first using the top anchor bolt 6, and then the side should be anchored using the side anchor bolt 5.

[0033] Following the steps described above, diagonal braces are evenly installed on the L-shaped steel strip between the two L-shaped trays. Each L-shaped tray on the L-shaped steel strip is then anchored sequentially according to the row spacing. Ultimately, the local support provided by each L-shaped tray enables the L-shaped steel strip to provide continuous support to the entire side corner, achieving the effect of protecting both the side and the top.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A support structure for controlling the deformation of roadway corners, characterized in that, It includes multiple L-shaped trays, L-shaped steel strips, and multiple diagonal tie rods. The L-shaped steel strips are set at the corners of the roadway. The multiple L-shaped trays are evenly connected to the L-shaped steel strips. The L-shaped trays are connected to the roadway by anchor bolts. The multiple diagonal tie rods are connected to the L-shaped steel strips by connecting rings on the steel strips and hooks at both ends of the diagonal tie rods. The included angle of the L-shaped pallet, the included angle of the L-shaped steel strip, and the angle at the corner of the tunnel are the same. The included angle of the L-shaped steel strip is the included angle between the two sides of the L-shaped steel strip, and the angle at the corner of the tunnel is the included angle between the top of the tunnel and the side of the tunnel.

2. The support structure for controlling the deformation of roadway corners according to claim 1, characterized in that, The L-shaped pallet includes a horizontal pallet and a vertical pallet. The horizontal pallet has a horizontal through hole, through which the anchor bolt is fixedly connected to the side of the roadway. The vertical pallet has a vertical through hole, through which the anchor bolt is fixedly connected to the side of the roadway.

3. The support structure for controlling the deformation of roadway corners according to claim 2, characterized in that, The distance between the horizontal through hole and the end of the horizontal tray furthest from the vertical tray is 100-500mm, the distance between the vertical through hole and the end of the vertical tray furthest from the horizontal tray is 100-500mm, and the thickness of the horizontal tray and the vertical tray is 3-15mm.

4. The support structure for controlling the deformation of roadway corners according to claim 2, characterized in that, The radius of the vertical and horizontal through holes is 1.5-3 times the radius of the anchor bolt.

5. The support structure for controlling the deformation of roadway corners according to claim 1, characterized in that, The vertical and horizontal steel strips of the L-shaped steel strips are connected by diagonal bracing rods, and three diagonal bracing rods are evenly connected to the steel strips between every two L-shaped trays.

6. The support structure for controlling the deformation of roadway corners according to claim 1, characterized in that, The vertical and horizontal steel strips of the L-shaped steel strip are each welded with a connecting ring.

7. The support structure for controlling the deformation of roadway corners according to claim 1, characterized in that, The tie rod has a hook at each end, which is connected to the steel strip via a connecting ring on the L-shaped steel strip.

8. The support structure for controlling the deformation of roadway corners according to claim 1, characterized in that, The width of the two sides of the L-shaped steel strip is 30-300mm, and the thickness of the L-shaped steel strip is 3-15mm.

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