Forepoling and forepoling group

Abstract

The utility model discloses a forepoling and a forepoling group, and belongs to the technical field of roadway support, the forepoling comprises a plurality of steel columns which are arranged in pairs left and right, the tops of the plurality of steel columns are connected with a top plate, a plurality of transverse connecting pipes are positioned and mounted on the inner sides of the steel columns at intervals up and down, connecting rods are arranged in the connecting pipes in a penetrating manner, and the outer sides of the steel columns are connected with flame-retardant coating cloth. And a reinforcing mesh is arranged on the outer side of the flame-retardant coating cloth. The structure that the steel columns are arranged side by side on the two sides is adopted, the top of the roadway is supported through the top plate on the top, the side face of the roadway is supported through the flame-retardant coating cloth matched with the reinforcing mesh, and the connecting rods are transversely inserted into the connecting pipes of the steel columns, so that the integrity and stability of the forepoling can be improved, and the supporting firmness is improved. And the overall structure is simple, construction is convenient, and practicability is good. And the connecting rods are inserted into the front and back adjacent connecting pipes, so that the reliable connection of the adjacent forepoling can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel support, in particular to an advance support and an advance support group. Background Art

[0002] A tunnel is a passage excavated on the ground or underground for the purpose of transportation, ventilation, drainage, pedestrians, etc. These passages can be divided into different types according to their purpose and service scope, including prospecting tunnels, production tunnels, and mining tunnels. Prospecting tunnels are mainly excavated to explore the ore body, understand the geological structure, and the burial conditions of the ore deposit, including shallow wells, exploration shafts, and exploration inclined shafts. Production tunnels are excavated to develop ore deposits and realize transportation, ventilation, drainage, and pedestrians between the surface and the ore body, including horizontal tunnels, vertical shafts, and inclined shafts. Mining tunnels are excavated to prepare for mining, including main vein tunnels and through-vein tunnels, which are used to divide the ore deposit into stages and mining areas (ore blocks).

[0003] The mining design of the working face of the mine generally requires the retention of lanes or small coal pillars (negative coal pillars) for delivery, and it is necessary to avoid stress concentration areas. The retention lanes require advanced supports to safely support the long-distance retention lanes. Mines generally no longer retain large coal pillars. Individual mines that need to retain large coal pillars need to avoid stress concentration areas. The advanced support group is an indispensable supporting equipment for comprehensive mechanized coal mining. The advanced support group is composed of several advanced support units that are arranged and connected. The advanced support group effectively supports the lanes of the coal mine when in use.

[0004] The advance support of the working face in existing mines usually adopts a single pillar plus an articulated top beam mode. During use, the advance support is easily damaged and bent, which affects the support firmness, causing the support area to fail, and the existing pillar height cannot be adjusted. Utility Model Content

[0005] In order to solve the problem that the advance support of the working face in existing mines usually adopts a single pillar plus an articulated top beam mode, and the advance support is easily damaged and bent during use, which affects the support firmness, the utility model provides an advance support and an advance support group.

[0006] On the one hand, the utility model is realized by the following technical solutions:

[0007] An advanced bracket comprises a plurality of steel columns arranged in pairs on the left and right, a top plate being connected to the top of the plurality of steel columns, a plurality of transverse connecting pipes being installed at intervals up and down on the inner sides of the steel columns, connecting rods being passed through the connecting pipes, a flame retardant coated cloth being connected to the outer sides of the steel columns, and a steel mesh being arranged on the outer sides of the flame retardant coated cloth.

[0008] A further improvement of the utility model is that the left and right steel columns are arranged in a front-to-back staggered manner.

[0009] A further improvement of the utility model also includes a supporting foot that is vertically slidably mounted on the bottom of the steel column; a plurality of first bolt holes in the front-to-back direction are vertically spaced apart on the supporting foot, a second bolt hole is opened on the steel column, and a first bolt that can penetrate the first bolt hole and the second bolt hole is also included.

[0010] A further improvement of the utility model is that the support foot is fastened to the bottom of the steel column by a cable.

[0011] A further improvement of the utility model is that the number of second bolt holes is at least two and they are vertically spaced apart.

[0012] A further improvement of the utility model is that the steel column is a channel steel structure, and its opening faces outwards.

[0013] A further improvement of the utility model is that the supporting foot is a channel steel structure, and its opening faces outwards.

[0014] A further improvement of the utility model is that a second bolt is vertically penetrated through the connecting pipe and can penetrate and position the connecting rod.

[0015] Another aspect of the utility model is achieved through the following technical solutions:

[0016] An advance bracket group comprises a plurality of the advance brackets arranged front and back, and connecting rods are inserted into the front and back adjacent connecting pipes.

[0017] It can be seen from the above technical solutions that the beneficial effects of the utility model are:

[0018] The structure of steel columns arranged side by side on both sides is adopted. The top plate supports the top of the tunnel, and the flame-retardant coated cloth and steel mesh support the side of the tunnel. The connecting rod is inserted into the connecting pipe of the steel column horizontally, which can improve the integrity and stability of the advanced support and the firmness of the support. The overall structure is simple, easy to build and practical. The connecting rod is inserted into the adjacent connecting pipes in front and behind to achieve reliable connection of adjacent advanced supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0021] Figure 2This is a schematic structural diagram of a specific implementation method of the utility model from a first perspective (without the top plate).

[0022] Figure 3 This is a schematic structural diagram of a specific implementation method of the utility model from a second viewing angle (without the top plate).

[0023] Figure 4 It is a schematic diagram of the structure of a specific implementation method of the utility model from a top view (without the top plate).

[0024] In the attached figure: 1. supporting foot; 2. steel column; 3. connecting pipe; 4. connecting rod; 5. steel mesh; 6. first bolt; 7. flame retardant coating cloth; 8. top plate; 9. first bolt hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0026] like Figure 1-4 As shown, the utility model discloses an advanced bracket, including a plurality of steel columns 2 arranged in pairs on the left and right, a horizontal top plate 8 is connected to the top of the plurality of steel columns 2, a plurality of transverse connecting pipes 3 are installed and positioned at intervals up and down on the inner side of the steel columns 2, a connecting rod 4 is passed through the connecting pipe 3, a flame retardant coating cloth 7 is connected to the outer side of the steel column 2, and a steel mesh 5 is provided on the outer side of the flame retardant coating cloth 7.

[0027] The structure of steel columns arranged side by side on both sides is adopted. The top plate 8 supports the top of the tunnel, the flame retardant coated cloth 7 cooperates with the steel mesh 5 to support the side of the tunnel, and the connecting rod 4 is inserted horizontally into the connecting pipe 3 of the steel column 2 to improve the integrity and stability of the advanced support and the firmness of the support. The overall structure is simple, easy to build and practical.

[0028] The left and right steel columns 2 are arranged alternately front and back (along the tunnel direction) to achieve balanced support for the tunnel.

[0029] The advanced support also includes a support foot 1 that is vertically slidably mounted on the bottom of the steel column 2; the support foot 1 is vertically spaced with a plurality of first bolt holes 9 in the front-rear direction, and the steel column 2 is provided with a second bolt hole, and also includes a first bolt 6 that can pass through the first bolt hole 9 and the second bolt hole. The first bolt 6 is selected to pass through different first bolt holes 9, and through the second bolt hole, and tightened by a nut, so that the height of the top plate 8 can be conveniently adjusted, and the use is more flexible.

[0030] The support leg 1 is connected to the bottom of the steel column 2 by a cable clamp, so as to achieve reliable stability of the connection between the steel column 2 and the support leg 1.

[0031] Among them, at least two second bolt holes are provided, and they are arranged vertically at intervals, and the spacing is consistent with the spacing of adjacent first bolt holes 9. Two first bolts 6 can be selected to pass through the corresponding second bolt holes and first bolt holes 9 to achieve the reliability of the connection between the steel column 2 and the supporting foot 1; the first bolt 6 can be selected to pass through different second bolt holes and first bolt holes 9, and the adjustment range is wider.

[0032] The steel column 2 is a channel steel structure, and its opening faces outwards. The support leg 1 is a channel steel structure, and its opening faces outwards. It is convenient to adjust the support leg 1 and the steel column 2, and the structure has high strength and is easy to obtain.

[0033] Wherein, the second bolt capable of penetrating and positioning the connecting rod 4 is vertically penetrated on the connecting pipe 3. By passing the second bolt through the connecting pipe 3 and the connecting rod 4, the connecting rod 4 can be positioned to prevent the connecting rod 4 from sliding forward and backward.

[0034] The utility model also discloses an advance bracket group, comprising a plurality of the advance brackets arranged front and back, and the connecting rods 4 are inserted into the front and back adjacent connecting tubes 3. Each advance bracket has 4-6 steel columns 2, and the connecting rods 4 are inserted into the front and back adjacent connecting tubes 3 to achieve reliable connection of adjacent advance brackets.

[0035] The advanced support and the advanced support group adopt a structure of steel columns arranged side by side on both sides, support the top of the tunnel through the top plate 8, support the side of the tunnel through the flame retardant coated cloth 7 and the steel mesh 5, and the connecting rod 4 is inserted horizontally into the connecting pipe 3 of the steel column 2, which can improve the integrity and stability of the advanced support and improve the support firmness. The overall structure is simple, easy to build, and practical. The connecting rod 4 is inserted into the connecting pipe 3 adjacent to the front and rear to achieve reliable connection of adjacent advanced supports.

[0036] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0037] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An advanced bracket, characterized in that: The invention comprises a plurality of steel columns (2) arranged in pairs on the left and right, a top plate (8) being connected to the top of the plurality of steel columns (2), a plurality of transverse connecting pipes (3) being installed and positioned at intervals on the inner sides of the steel columns (2), a connecting rod (4) being inserted into the connecting pipes (3), a flame retardant coating cloth (7) being connected to the outer sides of the steel columns (2), and a steel mesh (5) being provided on the outer sides of the flame retardant coating cloth (7).

2. The advanced bracket according to claim 1, characterized in that: The left and right steel columns (2) are arranged in a staggered manner front to back.

3. The advanced support according to claim 1, characterized in that: It also includes a support foot (1) which is vertically slidably mounted on the bottom of the steel column (2); a plurality of first bolt holes (9) in the front-rear direction are vertically spaced apart on the support foot (1); a second bolt hole is formed on the steel column (2), and a first bolt (6) capable of passing through the first bolt hole (9) and the second bolt hole is also included.

4. The advanced support according to claim 3, characterized in that: The support foot (1) is fastened to the bottom of the steel column (2) by means of a cable.

5. The advanced support according to claim 3, characterized in that: There are at least two second bolt holes, which are vertically spaced apart.

6. The advanced support according to claim 1, characterized in that: The steel column (2) is a channel steel structure, and its opening faces outwards.

7. The advanced support according to claim 3, characterized in that: The support leg (1) is a channel steel structure, and its opening faces outwards.

8. The advanced support according to claim 1, characterized in that: A second bolt is vertically penetrated through the connecting pipe (3) and is capable of penetrating and positioning the connecting rod (4).

9. An advanced support assembly, characterized in that: The invention comprises a plurality of advanced brackets as claimed in any one of claims 1 to 8 arranged in a front-to-rear manner, wherein the connecting rods (4) are inserted into the connecting tubes (3) adjacent to each other in the front and rear directions.

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