CN219795288U - A supporting structure for tunnel excavation in goaf areas of coal mines - Google Patents

Abstract

The utility model discloses a support structure for tunnel excavation in a coal mine goaf, which includes surrounding rocks of the goaf tunnel and a horizontal plate. An arc-shaped support plate is fixedly connected to the upper end of the horizontal plate. An anchor net is provided on the outer wall of the arc-shaped supporting plate, and anchor rods are provided at equal intervals on the outer wall of the horizontal plate. Each of the anchor rods penetrates the anchor net and extends into the surrounding rock of the tunnel in the goaf. , A plurality of support rods are fixedly connected between the arc-shaped supporting plate and the horizontal plate. Four connecting plates are symmetrically fixed and connected to the lower end surface of the horizontal plate, and each connecting plate is provided with threads. holes, and threaded rods are threadedly connected in the two threaded holes. According to the utility model, the arc-shaped support plate and the jacking plate are pressed against the inner wall of the device, so that the arc-shaped support plate can be supported to prevent the arc-shaped support plate from collapsing. Multiple support rods and the arc-shaped support plate, The horizontal plates are arranged in a triangle to strengthen the support for the arc-shaped support plates and enhance the structural support effect for the arc-shaped support plates.

Description

A supporting structure for tunnel excavation in goaf areas of coal mines

Technical field

The utility model relates to the technical field of coal mine tunnel support, and in particular to a support structure for tunnel excavation in a coal mine goaf.

Background technique

At present, many coal mines have left a large number of goaf areas due to disordered mining. As the intensity of coal mining increases, tunnels have to be dug in goaf areas for coal mining. However, these goafs generally take a long time to form. Not only do they contain a large number of cracks, but the surrounding rocks in the goafs are loose and broken and have poor self-stabilization capabilities, which brings great difficulties to tunnel excavation and support of mines.

Traditional tunnel supports basically do not have any effective protection and support measures for the tunnel side walls. They only support the top wall of the tunnel and ignore the support of the side walls, which reduces the overall support effect of the tunnel.

In response to the above problems, we propose a support structure for tunnel excavation in coal mine goafs.

Utility model content

The purpose of this utility model is to solve the problem in the prior art that "traditional tunnel brackets basically do not have any effective protection and support measures for the tunnel side walls. They only support the tunnel top wall and ignore the support of the side walls, causing the The overall support effect of the tunnel is reduced", so a support structure for tunnel excavation in the coal mine goaf is proposed.

In order to achieve the above purpose, the present utility model adopts the following technical solutions:

A support structure for tunnel excavation in the goaf of a coal mine, including the surrounding rock of the tunnel in the goaf and a horizontal plate. An arc-shaped supporting plate is fixedly connected to the upper end of the horizontal plate. The arc-shaped supporting plate An anchor net is provided on the outer side wall of the horizontal plate, and anchor rods are arranged at equal intervals on the outer side wall of the horizontal plate. Each of the anchor rods penetrates the anchor net and extends into the surrounding rock of the tunnel in the goaf. The arc-shaped A plurality of supporting rods are fixedly connected between the supporting plate and the horizontal plate. Four connecting plates are symmetrically fixed and connected to the lower end surface of the horizontal plate. Each connecting plate is provided with a threaded hole, and two There are threaded rods threadedly connected in the threaded holes, the opposite ends of the two corresponding threaded rods are fixedly connected with rotating blocks, and the opposite ends of the corresponding two threaded rods are rotationally connected with the jacking plate. , Each of the jacking plates is slidably connected to the lower end surface of the horizontal plate, and four vertical plates are symmetrically and fixedly connected to the lower end surface of the horizontal plate.

Preferably, a fixed cavity is provided in each vertical plate, a servo motor is fixedly installed in each fixed cavity, a rotation hole is provided in each vertical plate, and each rotation hole is The fixed cavity is connected with each other. The output end of each servo motor is fixedly connected with a rotating rod. Each rotating rod is arranged in a rotating hole. The lower end of each rotating rod is fixedly connected with a fixed cone. , the side walls of each rotating rod are fixedly connected with plowing teeth at equal intervals.

Preferably, four slide grooves are symmetrically provided on the lower end surface of each horizontal plate, and a slide block is slidably connected in each slide groove, and each slide block is fixedly connected to the jacking plate.

Preferably, each of the rotating blocks is symmetrically provided with fixing holes, each of the fixing holes is threadedly connected with a first fixing bolt, and each of the connecting plates is provided with a fixing bolt that matches the first fixing bolt. threaded fixing groove.

Preferably, each anchor rod is provided with a threaded connection groove, each threaded connection groove is threadedly connected with a second fixing bolt, and the other end of each second fixing bolt penetrates the anchor net and the arc. shaped support plate.

Preferably, four inclined rods are symmetrically and fixedly connected to the lower end surface of the horizontal plate, and the other end of each of the inclined rods is fixedly connected to the vertical plate.

Compared with the existing technology, the beneficial effects of this utility model are:

The arc-shaped support plate and the jacking plate are against the inner wall, and the arc-shaped support plate can be supported to prevent the arc-shaped support plate from collapsing. Between the multiple support rods, the arc-shaped support plate and the horizontal plate It is set up in a triangular shape to strengthen the support of the arc-shaped support plate and enhance the structural support effect of the arc-shaped support plate.

Description of the drawings

Figure 1 is a schematic diagram of a support structure for tunnel excavation in a coal mine goaf proposed by this utility model;

Figure 2 is an enlarged view of point A in Figure 1;

Figure 3 is an enlarged view of B in Figure 1;

Figure 4 is an enlarged view of C in Figure 1.

In the picture: 1 arc support plate, 2 horizontal plate, 3 support rod, 4 vertical plate, 5 servo motor, 6 rotating rod, 7 fixed cone, 8 connecting plate, 9 threaded rod, 10 jacking plate, 11 rotation Block, 12 first fixing bolt, 13 slide block, 14 anchor rod, 15 anchor net, 16 second fixing bolt, 17 inclined rod, 18 surrounding rock of the goaf roadway.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

In the description of the present utility model, it should be noted that, unless otherwise explicitly stipulated and limited, the terms "set", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Referring to Figures 1-4, a support structure for tunnel excavation in a coal mine goaf includes the surrounding rock 18 of the tunnel in the goaf and a horizontal plate 2. An arc-shaped support plate 1 is fixedly connected to the upper end of the horizontal plate 2. , an anchor net 15 is provided on the outer wall of the arc-shaped supporting plate 1, and anchor rods 14 are provided at equal intervals on the outer wall of the horizontal plate 2. Each anchor rod 14 penetrates the anchor net 15 and extends into the tunnel of the goaf. In the surrounding rock 18, a plurality of support rods 3 are fixedly connected between the arc-shaped supporting plate 1 and the horizontal plate 2. Four connecting plates 8 are symmetrically fixed and connected to the lower end surface of the horizontal plate 2. Each connecting plate 8 has Both are provided with threaded holes, and threaded rods 9 are threadedly connected in the two threaded holes. The opposite ends of the two corresponding threaded rods 9 are fixedly connected with rotating blocks 11, and the opposite ends of the corresponding two threaded rods 9 are fixedly connected. Each jacking plate 10 is rotatably connected to the lower end face of the transverse plate 2, and each jacking plate 10 is slidingly connected to the lower end face of the transverse plate 2. Four vertical plates 4 are symmetrically and fixedly connected to the lower end face of the transverse plate 2; the arc-shaped supporting plate 1 With the inner wall against which the jacking plate 10 is pressed, the arc-shaped supporting plate 1 can be supported to prevent the arc-shaped supporting plate 1 from collapsing. They are arranged in a triangular shape to strengthen the support for the arc-shaped supporting plate 1 and enhance the supporting effect of the structure on the arc-shaped supporting plate 1.

Among them, a fixed cavity is provided in each vertical plate 4, and a servo motor 5 is fixedly installed in each fixed cavity. A rotating hole is provided in each vertical plate 4, and each rotating hole is connected with the fixed cavity. The output end of each servo motor 5 is fixedly connected with a rotating rod 6. Each rotating rod 6 is arranged in a rotating hole. The lower end of each rotating rod 6 is fixedly connected with a fixed cone 7. The lower end of each rotating rod 6 is fixedly connected with a fixed cone 7. There are plowing teeth fixedly connected at equal intervals on the side wall. The output end of the servo motor 5 drives the rotating rod 6 and the fixed cone 7 to rotate. The plowing teeth on the fixed cone 7 facilitate plowing, so that the lower end of the servo motor 5 and the rotating rod 6 can be inserted into the ground.

Among them, four slide grooves are symmetrically provided on the lower end surface of each horizontal plate 2, and a slide block 13 is slidingly connected in each slide groove. Each slide block 13 is fixedly connected to the jacking plate 10. The slide block 13 Can slide left and right in the chute.

Among them, each rotating block 11 is symmetrically provided with fixing holes, each fixing hole is threadedly connected with a first fixing bolt 12, and each connecting plate 8 is provided with a threaded fixing hole matching the first fixing bolt 12. slot, the first fixing bolt 12 can fix the rotating block 11 on the connecting plate 8 .

Among them, each anchor rod 14 is provided with a threaded connection groove, and each threaded connection groove is threadedly connected with a second fixing bolt 16. The other end of each second fixing bolt 16 penetrates the anchor net 15 and the arc-shaped support. Plate 1, the second fixing bolt 16 fixes the arc-shaped support plate 1 on the anchor rod 14, so that the arc-shaped support plate 1 can be fixed on the inner wall of the surrounding rock 18 of the tunnel in the goaf.

Among them, four inclined rods 17 are symmetrically and fixedly connected to the lower end surface of the horizontal plate 2. The other end of each inclined rod 17 is fixedly connected to the vertical plate 4. The inclined rods 17 can support the horizontal plate 2.

In the utility model, when the servo motor 5 is started, the output end of the servo motor 5 drives the rotating rod 6 and the fixed cone 7 to rotate. The plowing teeth on the fixed cone 7 are convenient for digging soil, so that the lower end of the servo motor 5 and the rotating rod 6 can be inserted. On the ground, lay the anchor net 15 on the top inner wall of the surrounding rock 18 of the goaf roadway, drive the anchor rod 14 into the interior of the goaf roadway surrounding rock 18, and fix the anchor net 15 on the goaf roadway surrounding rock 18. , fix the arc-shaped support plate 1 on the anchor rod 14 through the second fixing bolt 16, so that the arc-shaped support plate 1 can be fixed on the inner wall of the surrounding rock 18 of the tunnel in the goaf, and use a tool to rotate the rotating block 11, The rotating block 11 drives the threaded rod 9 to rotate, the threaded rod 9 drives the jacking plate 10 to move, the jacking plate 10 is against the lower end inner wall of the arc-shaped support plate 1, and the first fixing bolt 12 is fixed to the connecting plate through the rotating block 11 8, the arc-shaped support plate 1 and the jacking plate 10 are pressed against the inner wall of the arc-shaped support plate 1 to prevent the arc-shaped support plate 1 from collapsing. The supporting plate 1 and the horizontal plate 2 are arranged in a triangle to strengthen the support for the arc-shaped supporting plate 1 and enhance the structural support effect for the arc-shaped supporting plate 1. Contents not described in detail in this description belong to this Prior art known to those skilled in the art.

The above are only preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed by the present utility model, implement the present utility model according to the present utility model. Novel technical solutions and utility model concepts, including equivalent substitutions or changes, shall be covered by the protection scope of the present utility model. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention. The utility model and simplified description do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. Furthermore, the terms "first, second or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Claims (6)

1. A support structure for tunnel excavation in the goaf of a coal mine, including the surrounding rock (18) of the tunnel in the goaf and a transverse plate (2), characterized in that the upper end surface of the transverse plate (2) is fixed An arc-shaped support plate (1) is connected to the arc-shaped support plate (1). An anchor net (15) is provided on the outer wall of the arc-shaped support plate (1). Anchors are provided at equal intervals on the outer wall of the horizontal plate (2). Rods (14), each of the anchor rods (14) penetrates the anchor net (15) and extends into the surrounding rock (18) of the tunnel in the goaf area. The arc-shaped supporting plate (1) and the horizontal plate (2 ) are fixedly connected with a plurality of support rods (3), and four connecting plates (8) are symmetrically fixedly connected to the lower end surface of the horizontal plate (2), and each connecting plate (8) is provided with a There are threaded holes, and threaded rods (9) are threadedly connected in the two threaded holes. The opposite ends of the two corresponding threaded rods (9) are fixedly connected with rotating blocks (11). The opposing ends of each of the threaded rods (9) are rotatably connected to a pushing plate (10), and each of the pushing plates (10) is slidably connected to the lower end surface of the transverse plate (2). Four vertical plates (4) are symmetrically and fixedly connected to the lower end surface of the plate (2). 2. A support structure for tunnel excavation in a coal mine goaf according to claim 1, characterized in that a fixed cavity is provided in each vertical plate (4), and each fixed cavity is provided in the vertical plate (4). Servo motors (5) are fixedly installed in the cavity. Each vertical plate (4) is provided with a rotation hole. Each rotation hole is connected to the fixed cavity. Each servo motor (5) A rotating rod (6) is fixedly connected to the output end of the rotating rod (6). Each rotating rod (6) is arranged in a rotating hole. The lower end of each rotating rod (6) is fixedly connected to a fixed cone (7). , plowing teeth are fixedly connected to the side wall of each rotating rod (6) at equal intervals. 3. A support structure for tunnel excavation in coal mine goafs according to claim 1, characterized in that four chutes are symmetrically provided on the lower end surface of each horizontal plate (2). A slide block (13) is slidably connected in each chute, and each slide block (13) is fixedly connected to the jacking plate (10). 4. A support structure for tunnel excavation in a coal mine goaf according to claim 1, characterized in that each of the rotating blocks (11) is symmetrically provided with fixed holes, and each of the rotating blocks (11) is symmetrically provided with fixed holes. First fixing bolts (12) are threadedly connected in the fixing holes, and each connecting plate (8) is provided with a threaded fixing groove matching the first fixing bolts (12). 5. A support structure for tunnel excavation in a coal mine goaf according to claim 1, characterized in that each anchor rod (14) is provided with a threaded connection groove, and each anchor rod (14) is provided with a threaded connection groove. The threaded connection grooves are all threaded with second fixing bolts (16), and the other end of each second fixing bolt (16) penetrates the anchor net (15) and the arc-shaped support plate (1). 6. A support structure for tunnel excavation in a coal mine goaf according to claim 1, characterized in that four inclined bars (17) are symmetrically fixed and connected to the lower end surface of the transverse plate (2). ), the other end of each of the inclined rods (17) is fixedly connected to the vertical plate (4).