Anchor net for anchoring and supporting during coal mining

Abstract

The utility model discloses an anchor net for anchoring and supporting during coal mining, which belongs to the technical field of roadway supporting and comprises an anchor net main body and a plurality of anchor rods for uniformly fixing the anchor net main body. An interception net is detachably installed under the anchor net body, the coverage area of the interception net is larger than or equal to that of the anchor net body, and the grid density of the interception net is larger than that of the anchor net body. When the anchor net is used for supporting, due to the fact that the intercepting net with the larger grid density is additionally arranged under the anchor net, the intercepting net can effectively intercept broken pebbles falling from the top of a roadway, and the safety of underground operating personnel is further guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tunnel support technology, specifically to an anchor mesh for anchoring support during coal mining. Background Technology

[0002] During coal mining, the surrounding rock in roadways is prone to deformation and collapse due to mining stress and geological tectonic movements, seriously threatening safe production. Anchor-mesh support, as the most commonly used active support technology for coal mine roadways, uses the synergistic effect of anchor bolts (cables) and metal mesh (or steel mesh) to transfer the stress of the surrounding rock to deeper, stable rock strata, achieving self-support of the surrounding rock.

[0003] Currently, although the anchor net can effectively bear the load, small stones still fall from the top of the tunnel from time to time. These stones will pass through the anchor net and fall, and then hit the workers. Even if the damage is not great, it will cause a certain degree of stress to the workers, which will lead to tension and anxiety among the workers. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an anchor net for anchoring and supporting coal mines during excavation, which can intercept falling objects from the top of the tunnel, thereby improving the safety of underground workers.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An anchor mesh for anchoring and support during coal mining includes an anchor mesh body and multiple anchor bolts that uniformly fix the anchor mesh body.

[0007] A detachable intercepting net is installed directly below the main body of the anchor net. The coverage area of ​​the intercepting net is greater than or equal to the coverage area of ​​the main body of the anchor net, and the mesh density of the intercepting net is greater than the mesh density of the main body of the anchor net.

[0008] By adopting the above scheme, when the anchor net is used for support, the addition of a denser interception net directly below it can effectively intercept small stones falling from the top of the tunnel, further ensuring the safety of underground workers.

[0009] As a preferred implementation method for anchoring support in coal mining, when the roadway width is narrow, a whole flexible net, such as high-strength polyester fiber or nylon, is used as the interception net. The left and right ends of the flexible net are suspended and fixed to the bottom of the vertical part of the anchor net body through multiple hooks. It has good extensibility and buffering properties and is suitable for local small-scale interception and buffering interception scenarios.

[0010] Alternatively, the flexible net can be further optimized by suspending and fixing the left and right ends of the flexible net to the bottom of the vertical side of the anchor net body through multiple hooks, while the middle of the flexible net is suspended and fixed to the middle of the horizontal part of the anchor net body through multiple hooks. At this time, the flexible net as a whole tilts and lowers from the middle to both sides, forming an inverted "V" shape structure, which makes it easier for debris to slide to both sides to avoid accumulation.

[0011] As a preferred implementation method for anchoring support in coal mining, when the roadway is wide, a single rigid net is used as the interception net, such as a metal screen or a high-strength plastic net. The left and right ends of the rigid net are suspended and fixed to the bottom of the vertical part of the anchor net body through multiple hooks. It has better strength and is suitable for local small-scale interception and buffer interception scenarios.

[0012] Alternatively, it can be further optimized by using two rigid nets, such as split metal mesh, that can be flipped or folded in the middle as the interception net. The left and right ends of the rigid net are suspended and fixed to the bottom of the vertical side of the anchor net body through multiple hooks, while the middle of the rigid net is suspended and fixed to the middle of the horizontal part of the anchor net body through multiple hooks. At this time, the rigid net is tilted and lowered from the middle to both sides, forming an inverted "V" shape structure, which makes it easy for debris to slide to both sides to avoid accumulation. At the same time, the flip-out design makes it easy to inspect or replace, and is suitable for scenarios that require regular cleaning of debris or adjustment of the interception angle.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are:

[0014] 1. When the anchor net is used for support, a larger mesh density interception net is added directly below it. This interception net can effectively intercept small stones falling from the top of the roadway, further ensuring the safety of underground workers.

[0015] 2. When the tunnel width is narrow, a whole flexible net is used as the interception net. When it is laid flat, it has good extensibility and buffering properties, and is suitable for local small-scale interception and scenarios that require buffering interception. When it is laid diagonally, it forms an inverted "V" shape structure, which makes it easy for debris to slide to both sides to avoid accumulation.

[0016] 3. When the tunnel is wide, using a single rigid net as the interception net provides better strength and is suitable for localized, small-scale interception or scenarios requiring buffer interception.

[0017] 4. When the alley is wide, two rigid nets that can be flipped or folded in the middle can be used as interception nets. When they are laid diagonally, they form an inverted "V" shape, which makes it easy for debris to slide to both sides to avoid accumulation. At the same time, the flip-out design makes it easy to inspect or replace, and is suitable for scenarios where debris needs to be cleaned regularly or the interception angle needs to be adjusted. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the anchor mesh used for anchoring support during coal mining in Example 1;

[0020] Figure 2 This is a front view of the anchor mesh used for anchoring support during coal mining in Example 1;

[0021] Figure 3 This is a three-dimensional structural diagram of the anchor mesh used for anchoring support during coal mining in Example 2;

[0022] Figure 4 This is a front view of the anchor mesh used for anchoring support during coal mining in Example 2;

[0023] Figure 5 This is a three-dimensional structural diagram of the anchor mesh used for anchoring support during coal mining in Example 3;

[0024] Figure 6 This is a front view of the anchor mesh used for anchoring support during coal mining in Example 3;

[0025] Figure 7 This is a three-dimensional structural diagram of the anchor mesh used for anchoring support during coal mining in Example 4;

[0026] Figure 8 This is a front view of the anchor mesh used for anchoring support during coal mining in Example 4.

[0027] Markings in the diagram: 1-Main body of anchor net; 2-Anchor bolt; 3-Flexible net; 4-Hook 1; 5-Hook 2; 6-Rigid net 1; 7-Rigid net 2. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1, as Figures 1 to 2As shown, an anchor mesh for anchoring support in coal mine mining is provided. It is used for supporting coal mine roadways and specifically includes an anchor mesh body 1 (grid density 50×50mm, wire diameter 3mm) and multiple M20 anchor bolts 2 (spaced 0.8m apart) evenly fixing the anchor mesh body 1. A detachable intercepting net is installed directly below the anchor mesh body 1, and the coverage area of ​​the flexible net 3 is greater than or equal to the coverage area of ​​the anchor mesh body 1, with a higher grid density than the anchor mesh body 1. During support, the anchor mesh, with its higher grid density intercepting net directly below, effectively intercepts small stones falling from the roadway ceiling, further ensuring the safety of underground workers.

[0030] Continue as Figures 1 to 2 As shown, when the tunnel width is narrow, a single flexible net 3 is used as the interception net. It is made of high-strength polyester fiber (mesh density 10×10mm, tensile strength ≥50kN / m), and its coverage area is the same as that of the anchor net body 1, both being 10m². 2 The flexible net 3 is suspended and fixed to the bottom of the vertical part of the anchor net body 1 by multiple hooks 4 (spaced 0.5m apart) at both ends. It has good extensibility and buffering properties and is suitable for local small-scale interception and buffering interception scenarios.

[0031] Example 2, as Figures 3 to 4 As shown, an anchor mesh for anchoring support in coal mine mining is provided. It is used for supporting coal mine roadways and specifically includes an anchor mesh body 1 (grid density 50×50mm, wire diameter 3mm) and multiple M20 anchor bolts 2 (spaced 0.8m apart) evenly fixing the anchor mesh body 1. A detachable intercepting net is installed directly below the anchor mesh body 1, and the coverage area of ​​the flexible net 3 is greater than or equal to the coverage area of ​​the anchor mesh body 1, with a higher grid density than the anchor mesh body 1. During support, the anchor mesh, with its higher grid density intercepting net directly below, effectively intercepts small stones falling from the roadway ceiling, further ensuring the safety of underground workers.

[0032] Continue as Figures 3 to 4 As shown, the only difference between this embodiment and the first embodiment is that the left and right ends of the flexible net 3 are suspended and fixed to the bottom of the vertical side of the anchor net body 1 by multiple hooks 1 4 (spaced 0.5m apart), while the middle of the flexible net 3 is suspended and fixed to the middle of the horizontal part of the anchor net body 1 by multiple hooks 2 5 (spaced 0.5m apart). At this time, the flexible net 3 as a whole tilts and lowers from the middle to both sides, forming an inverted "V" shaped structure, which facilitates the sliding of debris to both sides to avoid accumulation.

[0033] Example 3, as Figures 5 to 6As shown, an anchor mesh for anchoring support in coal mine mining is provided. It is used for supporting coal mine roadways and specifically includes an anchor mesh body 1 (grid density 50×50mm, wire diameter 3mm) and multiple M20 anchor bolts 2 (spaced 0.8m apart) evenly fixing the anchor mesh body 1. A detachable intercepting net is installed directly below the anchor mesh body 1, and the coverage area of ​​the flexible net 3 is greater than or equal to the coverage area of ​​the anchor mesh body 1, with a higher grid density than the anchor mesh body 1. During support, the anchor mesh, with its higher grid density intercepting net directly below, effectively intercepts small stones falling from the roadway ceiling, further ensuring the safety of underground workers.

[0034] Continue as Figures 5 to 6 As shown, the only difference between this and Example 1 is that when the tunnel width is wide, a single rigid mesh 6 is used as the interception mesh, which is a metal mesh (mesh density 10×10mm). The left and right ends of the rigid mesh 6 are suspended and fixed to the bottom of the vertical part of the anchor mesh body 1 by multiple hooks 4 (spaced 0.5m apart). This provides better strength and is suitable for localized small-scale interception and buffer interception scenarios.

[0035] Example 4, as Figures 7 to 8 As shown, an anchor mesh for anchoring support in coal mine mining is provided. It is used for supporting coal mine roadways and specifically includes an anchor mesh body 1 (grid density 50×50mm, wire diameter 3mm) and multiple M20 anchor bolts 2 (spaced 0.8m apart) evenly fixing the anchor mesh body 1. A detachable intercepting net is installed directly below the anchor mesh body 1, and the coverage area of ​​the flexible net 3 is greater than or equal to the coverage area of ​​the anchor mesh body 1, with a higher grid density than the anchor mesh body 1. During support, the anchor mesh, with its higher grid density intercepting net directly below, effectively intercepts small stones falling from the roadway ceiling, further ensuring the safety of underground workers.

[0036] Continue as Figures 7 to 8 As shown, the only difference from Embodiment 3 is that two rigid mesh 2 7 that can be flipped or folded from the middle are used as the interception net. It is a split metal mesh (mesh density 10×10mm). The left and right ends of the rigid mesh 2 7 are suspended and fixed to the bottom of the vertical side of the anchor net body 1 by multiple hooks 1 4 (spaced 0.5m apart). At the same time, the middle of the rigid mesh 2 7 is suspended and fixed to the middle of the horizontal part of the anchor net body 1 by multiple hooks 2 5 (spaced 0.5m apart). At this time, the rigid mesh 2 7 is tilted and lowered from the middle to both sides, forming an inverted "V" shape structure, which makes it easy for debris to slide to both sides to avoid accumulation. At the same time, the flip-out design makes it easy to inspect or replace, and is suitable for scenarios that require regular cleaning of debris or adjustment of the interception angle.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An anchor mesh for anchoring and support during coal mining, comprising an anchor mesh body and multiple anchor bolts that uniformly fix the anchor mesh body; Its features are: A detachable intercepting net is installed directly below the main body of the anchor net. The coverage area of ​​the intercepting net is greater than or equal to the coverage area of ​​the main body of the anchor net, and the mesh density of the intercepting net is greater than the mesh density of the main body of the anchor net.

2. The anchor mesh for anchoring support during coal mining according to claim 1, characterized in that: The interception network is a single flexible net.

3. The anchor mesh for anchoring and supporting coal mining as described in claim 2, characterized in that: The flexible net is suspended and fixed to the bottom of the vertical part of the anchor net body by multiple hooks at both ends.

4. The anchor mesh for anchoring and supporting coal mining as described in claim 3, characterized in that: The left and right ends of the flexible net are suspended and fixed to the bottom of the vertical side of the anchor net body by multiple hooks, while the middle of the flexible net is suspended and fixed to the middle of the horizontal part of the anchor net body by multiple hooks. At this time, the entire flexible net tilts and lowers from the middle to both sides.

5. The anchor mesh for anchoring support during coal mining according to claim 1, characterized in that: The interception network is a single rigid net.

6. The anchor mesh for anchoring support during coal mining according to claim 5, characterized in that: The left and right ends of the rigid net are suspended and fixed to the bottom of the vertical part of the anchor net body by multiple hooks.

7. The anchor mesh for anchoring and supporting coal mining as described in claim 1, characterized in that: The interception net consists of two rigid nets that can be flipped or folded in the middle.

8. The anchor mesh for anchoring support during coal mining according to claim 7, characterized in that: The left and right ends of the rigid net 2 are suspended and fixed to the bottom of the vertical side of the anchor net body through multiple hooks 1. At the same time, the middle of the rigid net 2 is suspended and fixed to the middle of the horizontal part of the anchor net body through multiple hooks 2. At this time, the rigid net 2 as a whole tilts and lowers from the middle to both sides.

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