Small coal pillar roadway protection supporting device

Abstract

The utility model relates to the technical field of coal mining, and discloses a small coal pillar roadway protection supporting device. The small coal pillar roadway protection supporting device comprises a supporting structure assembly, first coal pillars are connected and installed on the two sides of the upper end of the supporting structure assembly, second coal pillars are fixedly installed at the rear ends of the first coal pillars, a reinforcing structure assembly is connected and installed at the upper end of the supporting structure assembly, and anchor rods are connected and installed at the upper end of the reinforcing structure assembly; the first support is connected to the lower portion of the upper end of the anchor rod, the second support is connected to the upper end of the first support, and the pedestal block is connected to the right side of the upper end of the anchor rod. The technical problems that a follow-up roadway is close to a lateral residual bearing pressure peak value due to the fact that roadway driving disturbs lateral bearing pressure distribution, and follow-up use is affected by strong deformation of surrounding rocks in the tunneling process are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mining, in particular to a small coal column lane protection supporting device. BACKGROUND

[0002] The coal mine section roadway currently mainly adopts wide coal column lane protection, and the coal column width is generally 20-30m, and can reach 40-50m in individual mining areas. This can cause a large amount of coal resource loss. In recent years, more and more attention has been paid to gob-side entry retaining and small coal column lane protection at home and abroad. Among them, the gob-side entry retaining theory has been researched a lot in China, and the related technology has been gradually improved in the coal seam with good conditions, but compared with the small coal column lane protection, the entry retaining construction process is more complex, and the auxiliary transportation amount is large. And both of these two ways have the problems of large roadway deformation, difficult maintenance and high supporting cost.

[0003] The existing Chinese utility model patent with the publication number CN220645978U discloses a short-distance coal seam roadway roof supporting device, which comprises a hydraulic lifting rod and a strut beam. The top end of the hydraulic lifting rod is threadedly connected with the bottom end of the strut beam. Two locking anchor rods are arranged at the bottom of each hydraulic lifting rod. Anchor rods are arranged at equal distances on the top end of the strut beam. When the strut beam is used to support the roof, the two hydraulic lifting rods are aligned and installed through the connection of the connecting plate and the connecting plate two at the bottom end of the strut beam. The locking connecting hole one and the connecting hole two are installed through bolts. At this time, the hydraulic lifting rod is connected with the strut beam. The hydraulic lifting rod is lifted upward to drive the strut beam to support the roof upward. When not in use, the device can be disassembled and reused for convenient installation.

[0004] Based on the above patent search and combined with the existing technical equipment, it is found that the small coal column lane protection is used in the coal mine section roadway. The small coal column is easy to break when the small coal column lane protection is used, which leads to poor supporting capacity of the subsequent small coal column and causes the subsequent roadway to be near the lateral residual bearing pressure peak value. The excavation disturbs the lateral bearing pressure distribution, and the surrounding rock deforms intensively during excavation, which affects the subsequent use. When the support is used, the coal blocks in the upper end coal seam are easy to fall, and the upper end supporting capacity is poor, which causes the subsequent support to collapse. These problems affect the use of the device. UTILITY MODEL CONTENTS

[0005] (I) Technical problems solved

[0006] In view of the shortcomings of the prior art, the small coal column lane protection supporting device provided by the utility model has the advantages of effectively preventing the small coal column from breaking when the small coal column lane protection is used, leading to poor supporting capacity of the subsequent small coal column, causing the subsequent roadway to be near the lateral residual bearing pressure peak value, disturbing the lateral bearing pressure distribution during excavation, and the surrounding rock deforming intensively during excavation, which affects the subsequent use. The above technical problems are solved.

[0007] Technical solutions

[0008] In order to achieve the above object, the utility model provides the following technical scheme: a small coal column protects the lane supporting device, including support structure subassembly, the upper end of support structure subassembly is connected with the installation through the high -efficient support and the anchor rod support combination, selects the HRB400 level high -strength anchor rod of 20mm diameter, the combination support of rubber and polymer material is selected to high -efficient support, ensure that the support can bear the load and the deformation of the reinforcing structure subassembly under high stress condition, the upper end of support structure subassembly is connected with the installation through the support rod of inside, and the support rod is triangular structure, and it is convenient for subsequent increase the stability of the protection structure component between the protective layer and the protection plate.

[0009] The upper end of the support structure subassembly is connected with the installation of the first coal column on both sides, the rear end of the first coal column is fixedly installed with the second coal column, the first coal column is used in combination with the second coal column, the distance between the coal columns is adjusted to 30m to ensure the mutual support between the small coal columns, and subsequent use is facilitated.

[0010] The upper end of the reinforcing structure subassembly is connected with the installation of the anchor rod, and the first support is connected and installed below the upper end of the anchor rod, the upper end of the first support is connected and installed with the second support, the right side of the upper end of the anchor rod is connected and installed with the pedestal block, and the pedestal block is connected with the anchor rod, by fixing the pedestal block to the upper end of the first support and the second support, subsequent reinforcement and installation of the pedestal block through fasteners are facilitated.

[0011] The upper end of the protection structure component is provided with a support rod, the upper end of the support rod is fixedly provided with a protective layer, the protective layer is fixedly installed on the upper end of the support rod, and the upper end of the protective layer is in an arch structure, so that the overall structure of the upper end is reinforced for subsequent use.

[0012] As a preferred technical scheme of the utility model, the upper end of the support structure subassembly is connected with the installation of the stabilizing plate, and the upper end of the stabilizing plate is connected with the side face, the side face is fixedly installed between the first coal column and the second coal column, and the upper end of the side face is provided with a hole, the anchor rod is connected through the hole.

[0013] As a preferred technical scheme of the utility model, the upper end of the reinforcing structure subassembly is connected with the installation of the fastener, the fastener is connected at the right side of the pedestal block, and the fastener is rotated on the upper end of the anchor rod, so that the pedestal block is installed subsequently.

[0014] As the preferred technical scheme of the utility model, the upper end of the protection structure component is equipped with an adjusting rod, and the upper end of the adjusting rod is fixedly equipped with a mounting plate, the inner side of the mounting plate is fixedly equipped with a protection plate, and the protection plate is fixedly installed on the upper end of the mounting plate and is used in combination with the support rod on the upper end.

[0015] As the preferred technical scheme of the utility model, the reinforcing structure component is connected and installed in the inner side of the side surface in the support structure component, and the protection structure component is connected and installed on the upper end of the first coal column and the second coal column in the support structure component.

[0016] As the preferred technical scheme of the utility model, the first coal column and the second coal column are of the same structure, the diameter of the upper end of the first coal column is 6 m, the installation interval between the first coal column and the second coal column is 30 m, the side surface is connected and installed between the first coal column and the second coal column, and the upper end of the side surface is fixedly equipped with a hole.

[0017] As the preferred technical scheme of the utility model, the anchor rod is connected with the hole fixedly installed on the upper end of the side surface, the anchor rod is of an inclined structure and has a diameter of 20 mm, the first support and the second support are of the same structure, the first support is of an L shape, and the fastener fixes the anchor rod to the upper end of the first support and the second support.

[0018] As the preferred technical scheme of the utility model, the adjusting rod is connected and installed on the upper end of the first coal column and the second coal column, the support rod is of a triangular structure, and the upper end of the protection layer is of an arch structure.

[0019] Compared with the prior art, the utility model provides a small coal column lane protection supporting device with the following advantages

[0020] Beneficial effects:

[0021] 1.The utility model discloses a whole device is set up, and one small coal column with 6m diameter is left in every 30m, and the distance between every small coal column is between 30m to 40m to ensure the mutual support between small coal columns, and the left position is not less than 2m from the end of the support in the close distance of the working face to ensure the stability and support effect of the left coal column, avoid the influence on the working face under the condition of coal column displacement, deformation, damage and the like, select the HRB400 level high-strength anchor rod with 20mm diameter, and the combination support of rubber and polymer material is selected for high -efficient support, ensure that the support can bear the load and deformation under the high stress condition, utilize the certain tension of anchor rod in the coal seam to make the support not easy to be extruded and deformed by coal and rock, improve the support effect, adopt the intensive anchor rod support technology to enhance the overall stability of the support system, adopt the steel fiber reinforced concrete (SFRC) support technology to improve the crack resistance and tensile strength of the support system, effectively prevent the small coal column from being easily broken when the small coal column is used for protecting the roadway, lead to the poor support ability of the subsequent small coal column, cause the subsequent roadway to be near the lateral residual supporting pressure peak value, the roadway excavation disturbs the lateral supporting pressure distribution, and the surrounding rock is strongly deformed during the excavation and affects the subsequent use. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole structure schematic diagram of the utility model;

[0023] Figure 2 It is the support structure assembly schematic diagram of the utility model;

[0024] Figure 3 It is the reinforcing structure assembly schematic diagram of the utility model;

[0025] Figure 4 It is the protection structure assembly schematic diagram of the utility model;

[0026] Among them: 1, support structure assembly;101, stabilizing plate;102, first coal column;103, second coal column;104, side face;2, reinforcing structure assembly;201, anchor rod;202, first support;203, second support;204, pedestal block;205, fastener;3, protection structure assembly;301, adjusting rod;302, mounting plate;303, protection plate;304, support rod;305, protective layer. DETAILED DESCRIPTION

[0027] The embodiment of the utility model is further described in detail in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0028] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] Please refer to Figure 1 - Figure 4 In the embodiment, a small coal column lane protection supporting device, comprising: a support structure assembly 1, the upper end of the support structure assembly 1 is connected and installed with a first coal column 102, the rear end of the first coal column 102 is fixedly installed with a second coal column 103, the upper end of the support structure assembly 1 is connected and installed with a reinforcing structure assembly 2, the upper end of the reinforcing structure assembly 2 is connected and installed with an anchor rod 201, and the upper end of the anchor rod 201 is connected and installed with a first support 202 below, the upper end of the first support 202 is connected and installed with a second support 203, the right side of the upper end of the anchor rod 201 is connected and installed with a pedestal block 204, the upper side of the support structure assembly 1 is connected and installed with a protection structure assembly 3, the upper end of the protection structure assembly 3 is installed with a support rod 304, the upper end of the support rod 304 is fixedly installed with a protective layer 305, the reinforcing structure assembly 2 is connected and installed in the inside of the side edge surface 104 in the support structure assembly 1, and the protection structure assembly 3 is connected and installed at the upper end of the first coal column 102 and the second coal column 103 in the support structure assembly 1.

[0031] Through the above structure; support structure assembly 1 by every 30 m stay one diameter 6 m coal pillar, to ensure the mutual support between small coal pillar, avoid in coal pillar displacement, deformation, damage and so on under the condition of influence to working face, reinforcement structure assembly 2 through high efficiency support and anchor rod 201 support combination, select diameter 20 mm HRB400 level high strength anchor rod 201, high efficiency support selects the combination support of rubber and polymer material, ensure that the support can bear the load and deformation under high stress condition, protection structure assembly 3 through the inside support rod 304 connects the upper end protection layer 305, support rod 304 is triangular structure, facilitate subsequent increase the stability between protection layer 305 and protection plate 303.

[0032] Please refer to Figure 1 - Figure 4 The upper end of the support structure assembly 1 is connected and mounted with a stabilizing plate 101, and the upper end of the stabilizing plate 101 is connected and mounted with a side surface 104. The first coal pillar 102 and the second coal pillar 103 have the same structure. The diameter of the first coal pillar 102 at the upper end is 6 m. The installation distance between the first coal pillar 102 and the second coal pillar 103 is 30 m. The side surface 104 is connected and installed between the first coal pillar 102 and the second coal pillar 103. The upper end of the side surface 104 is fixedly installed with a hole.

[0033] Through the above structure: the first coal pillar 102 at the upper end is fixedly installed by the installation of the stabilizing plate 101. The coal pillar at the upper end is installed to the ground for use by the stabilizing plate 101. The first coal pillar 102 and the second coal pillar 103 are used in combination. The distance between the coal pillars is adjusted to 30 m to ensure the mutual support between small coal pillars, which is convenient for subsequent use. The side surface 104 is fixedly installed between the first coal pillar 102 and the second coal pillar 103, and the upper end of the side surface 104 is installed with a hole. The anchor rod 201 is connected by being inserted through the hole.

[0034] Please refer to Figure 1 - Figure 4 The upper end of the reinforcement structure assembly 2 is connected and mounted with a fastener 205. The anchor rod 201 is inserted and connected through the hole fixedly installed at the upper end of the side surface 104. The anchor rod 201 is inclined and has a diameter of 20 mm. The first bracket 202 and the second bracket 203 have the same structure. The first bracket 202 is L-shaped. The fastener 205 fixes the anchor rod 201 to the upper end of the first bracket 202 and the second bracket 203.

[0035] Through the above structure: through the installation of the anchor rod 201, the anchor rod 201 is combined with the support, the HRB400 level high-strength anchor rod 201 with a diameter of 20mm is selected, the combination support of rubber and polymer material is selected for efficient support, the load and deformation under high stress conditions are ensured, a certain tension is formed in the coal seam by using the anchor rod 201, so that the support is not easy to be extruded and deformed by the coal rock, the supporting effect is improved, the first support 202 and the second support 203 are combined for use, and the upper end of the support is L-shaped, which is convenient for placing and installing the pedestal block 204 later, the pedestal block 204 is connected with the anchor rod 201, by fixing the pedestal block 204 to the upper end of the first support 202 and the second support 203, the pedestal block 204 is conveniently reinforced and installed by the fastener 205 later, the fastener 205 is connected to the right side of the pedestal block 204, and the fastener 205 is rotated on the upper end of the anchor rod 201, which is convenient for installing the pedestal block 204 later.

[0036] Please refer to Figure 1 Figure 4 The upper end of the protection structure assembly 3 is provided with an adjusting rod 301, the upper end of the adjusting rod 301 is fixedly provided with a mounting plate 302, the inner side of the mounting plate 302 is fixedly provided with a protection plate 303, the adjusting rod 301 is connected and mounted at the upper end of the first coal column 102 and the second coal column 103, the support rod 304 is a triangular structure, and the upper end of the protection layer 305 is an arch-shaped structure.

[0037] Through the above structure: through the installation of the adjusting rod 301, the structure at the upper end is connected and mounted at the upper end of the first coal column 102 and the second coal column 103, which is convenient for adjusting the height of the upper end later, the mounting plate 302 is fixedly mounted at the upper end of the adjusting rod 301, the protection plate 303 at the upper end is fixedly mounted through the mounting plate 302, which is convenient for protecting the upper end of the roadway to prevent coal blocks from falling, the protection plate 303 is fixedly mounted at the upper end of the mounting plate 302 and is used in combination with the support rod 304 at the upper end, the protection layer 305 at the upper end is supported through the triangular structure of the support rod 304, so as to prevent the protection layer 305 from collapsing later, the protection layer 305 is fixedly mounted at the upper end of the support rod 304, and the upper end of the protection layer 305 is an arch-shaped structure, which is convenient for reinforcing the overall structure at the upper end for use later.

[0038] ​In use, first, the original first coal pillar 102 and the diameter size of the second coal pillar 103 are changed to 6m, the distance between the first coal pillar 102 and the second coal pillar 103 is between 30m and 40m, which facilitates subsequent mutual support between the coal pillars, and the remaining position is at a distance of not less than 2m from the end of the support on both sides of the working face, so as to ensure the stability and supporting effect of the remaining coal pillar, avoid affecting the working face under the conditions of displacement, deformation and destruction of the coal pillar, and increase the overall stability. In order to increase the overall stability, the upper end of the side surface 104 between the first coal pillar 102 and the second coal pillar 103 is provided with a reinforcing structure assembly 2, a hole is formed in the upper end of the side surface 104, and an anchor rod 201 is arranged in the reinforcing structure assembly 2. The anchor rod 201 is embedded in the soil or rock by embedding a reinforcing bar or a prestressed reinforcing bar, and injecting materials such as fine stone concrete, and generates resistance to the movement and deformation of the soil or rock through the cohesive force, friction force and comprehensive action of the soil or rock. The anchor rod 201 is inserted into the soil on both sides through the hole in the upper end of the side surface 104. The anchor rod 201 is selected to be a high-strength anchor rod 201 of HRB400 level with a diameter of 20mm. The high-efficiency support is a combination support of rubber and polymer materials, which can ensure that the support can bear the load and deformation under high stress conditions. The upper and lower ends of the side surface 104 are provided with first supports 202 and second supports 203. The upper end of the anchor rod 201 is fixedly provided with a pedestal block 204. The pedestal block 204 is placed on the upper end of the support, and the pedestal block 204 is fixed by rotating the anchor rod 201 through a fastener 205. The upper end of the coal pillar is provided with an adjusting rod 301. The adjusting rod 301 is used to fixedly install an installation plate 302 at the upper end. The inner side of the installation plate 302 is fixedly provided with a protective plate 303. The protective plate 303 is used to install a support rod 304 at the upper end. The support rod 304 is a triangular structure. The protective layer 305 is an arch structure. The support rod 304 and the protective layer 305 are connected to support and protect the upper end of the roadway.

[0039] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A small coal pillar roadway support device, characterized in that, The utility model provides a support structure subassembly (1) is connected with the first coal column (102) and the second coal column (103) of the upper end of the first coal column (102) and the second coal column (103) are connected with the reinforcing structure subassembly (2) of the upper end of the support structure subassembly (1), and the anchor rod (201) is connected with the first support (202) and the second support (203) of the upper end of the reinforcing structure subassembly (2), and the pedestal block (204) is connected with the upper end right side of the anchor rod (201), and the protection structure subassembly (3) is connected with the upper end of the support structure subassembly (1), and the support rod (304) is installed on the upper end of the protection structure subassembly (3), and the protective layer (305) is fixedly installed on the upper end of the support rod (304).

2. A small-pillar rib support device according to claim 1, characterized in that, The upper end of the support structure subassembly (1) is connected with the stabilizing plate (101), and the upper end of the stabilizing plate (101) is connected with the side face (104).

3. A small-pillar rib protection support device according to claim 1, characterized by The upper end of the reinforcing structure subassembly (2) is connected with the fastener (205).

4. A small-pillar rib protection support device according to claim 1, characterized by The upper end of the protection structure subassembly (3) is provided with the adjusting rod (301), and the adjusting rod (301) is fixedly provided with the mounting plate (302) on the upper end, and the inner side of the mounting plate (302) is fixedly provided with the protection plate (303).

5. A small-pillar rib protection and support device according to claim 1, characterized in that, The reinforcing structure subassembly (2) is connected and installed in the inside of the side face (104) in the support structure subassembly (1), and the protection structure subassembly (3) is connected and installed on the upper end of the first coal column (102) and the second coal column (103) in the support structure subassembly (1).

6. A small-pillar rib protection and support device according to claim 2, characterized in that, The first coal column (102) and the second coal column (103) are the same structure, the diameter of the first coal column (102) is 6m, the installation interval between the first coal column (102) and the second coal column (103) is 30m, the side face (104) is connected and installed between the first coal column (102) and the second coal column (103), and the upper end of the side face (104) is fixedly provided with a hole.

7. A small-pillar rib protection support device according to claim 3, characterized by The anchor rod (201) is connected with the hole fixedly provided on the upper end of the side face (104), the anchor rod (201) is an inclined structure, and the diameter of the anchor rod (201) is 20mm, the first support (202) and the second support (203) are the same structure, the first support (202) is L-shaped, and the fastener (205) is fixed to the upper end of the first support (202) and the second support (203).

8. A small-pillar rib protection and support device according to claim 4, characterized in that, The adjusting rod (301) is connected and installed on the upper end of the first coal column (102) and the second coal column (103), the support rod (304) is a triangular structure, and the upper end of the protective layer (305) is an arch structure.

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