CN220890220U - Coal mine tunnel side-wall-preventing structure - Google Patents

Abstract

The utility model discloses an anti-ledge structure of a coal mine roadway, which comprises two main bodies, wherein the main bodies are provided with through holes, the inner side walls of the through holes are rotationally connected with mounting blocks, the top walls and the bottom walls of the mounting blocks are fixedly connected with fixing blocks, the fixing blocks are rotationally connected with threaded cylinders through bearings, the threaded cylinders are in threaded connection with screws, one ends of the screws outside the threaded cylinders are fixedly connected with supporting plates together, the threaded cylinders are in interference fit with driven gears, the main bodies are provided with functional holes, the main bodies are rotationally connected with rotating shafts through bearings in a penetrating mode, one ends of the rotating shafts extend into the functional holes in a penetrating mode and are in interference fit with driving gears, and the driving gears are meshed with the two driven gears together. The utility model can also have better supporting effect on the inclined roadway side, achieves the purpose of preventing the roadway side from being sliced, can be used in roadways with different widths, and has stronger practicability.

Description

Coal mine tunnel side-wall-preventing structure

Technical Field

The utility model relates to the technical field of coal mine ledge preventing structures, in particular to a coal mine roadway ledge preventing structure.

Background

Coal mine roadways are tunnels for mining lifting, transportation, ventilation, drainage, power supply, and the like, when underground mining. In the tunneling process, the phenomenon of rock burst and other ore pressure appearance can occur at any time, so that in order to ensure the safety and stability of tunneling and the subsequent tunnel operation period, an anti-burst structure is needed to be used for supporting and fixing surrounding rocks of the tunnel side part when tunneling the tunnel, especially a loose broken coal rock mass tunnel, thereby preventing burst of the surrounding rocks and ensuring the operation safety of staff in the tunnel.

The conventional ledge preventing structure generally supports a roadway ledge through a plate, and in the tunneling process of the roadway, the roadway ledge is not vertical and possibly has a certain angle, and at the moment, the plate cannot be well attached to the roadway ledge, so that a good ledge preventing effect cannot be achieved; the supporting width of the existing ledge preventing structure cannot be adjusted according to the widths of different roadways, so that the use is inconvenient.

Disclosure of utility model

The utility model aims to solve the defects in the existing roadway, particularly in the broken coal rock mass roadway tunneling construction technology, and provides an anti-ledge structure of a coal mine roadway.

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

The utility model provides a coal mine tunnel prevents piece group structure, includes two main parts, the through-hole has been seted up to the main part, the through-hole inside wall rotates and is connected with the installation piece, the equal fixedly connected with fixed block of installation piece roof and diapire, the fixed block runs through the bearing and rotates and be connected with a screw section of thick bamboo, screw section of thick bamboo threaded connection has the screw rod, two the screw rod is located the outside one end of screw section of thick bamboo is fixedly connected with backup pad jointly, screw section of thick bamboo interference fit has driven gear, the function hole has been seted up to the main part, the main part runs through the bearing and rotates and be connected with the pivot, pivot one end runs through and extends to in the function hole and interference fit has drive gear, drive gear jointly with two driven gear engagement.

Preferably, two lateral walls on one side opposite to the main body are respectively and fixedly connected with a sliding sleeve and a sliding column, a plurality of threaded holes are formed in the bottom wall of the sliding column, and two fixing bolts are connected with the bottom wall of the sliding sleeve in a threaded manner.

Preferably, one end of the rotating shaft far away from the driving gear penetrates through and extends to the outside of the main body and is fixedly connected with an operation block, and the operation block is provided with an inner hexagonal hole.

Preferably, two opposite inner side walls of the through hole are respectively connected with a connecting column through bearings in a rotating mode, and one end, close to the mounting block, of the connecting column is fixedly connected with the side wall of the mounting block.

Preferably, the size of the driving gear is smaller than the size of the driven gear.

Preferably, the lead angle of the screw is smaller than the equivalent friction angle of the screw pair formed by the thread cylinder and the screw.

Compared with the prior art, the utility model has the advantages that:

1. The supporting plate is connected with the rotatable mounting block, so that the supporting angle of the supporting plate can be adjusted, and the supporting plate can be tightly attached to a roadway wall with a certain inclination angle in the supporting process, so that the supporting force is effectively applied to the roadway wall, and a better ledge-preventing effect is generated;

2. The sliding sleeve is connected with the sliding column between the two main bodies, so that the distance between the two main bodies can be changed randomly, the two bolts on the sliding sleeve are matched with the bolt holes on the sliding column to lock the distance between the two main bodies, and the ledge-preventing structure can be used in roadways with different widths, so that the practicability of the structure is improved greatly.

Drawings

FIG. 1 is a schematic diagram of a coal mine tunnel ledge-preventing structure according to the present utility model;

Fig. 2 is an enlarged view at a in fig. 1;

FIG. 3 is a cross-sectional view at B-B in FIG. 1.

In the figure: the device comprises a main body 1, a through hole 2, a connecting column 3, a mounting block 4, a fixing block 5, a threaded cylinder 6, a screw rod 7, a supporting plate 8, a driven gear 9, a functional hole 10, a rotating shaft 11, a driving gear 12, an operating block 13, a sliding sleeve 14, a sliding column 15, a threaded hole 16 and a fixing bolt 17.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present utility model.

Referring to fig. 1-3, an anti-ledge structure of a coal mine roadway comprises two main bodies 1, wherein a through hole 2 is formed in each main body 1, an installation block 4 is rotatably connected to the inner side wall of each through hole 2, fixing blocks 5 are fixedly connected to the top wall and the bottom wall of each installation block 4, each fixing block 5 is connected with a threaded cylinder 6 through bearing penetrating rotation, each threaded cylinder 6 is in threaded connection with a screw rod 7, one ends of the two screw rods 7, located outside the threaded cylinders 6, are fixedly connected with a supporting plate 8 together, each threaded cylinder 6 is in interference fit with a driven gear 9, a functional hole 10 is formed in each main body 1, a rotating shaft 11 is rotatably connected through bearing penetrating rotation, one end of each rotating shaft 11 penetrates into the corresponding functional hole 10 and is in interference fit with a driving gear 12, and the driving gears 12 are meshed with the two driven gears 9 together.

The side walls of the opposite sides of the two main bodies 1 are respectively fixedly connected with a sliding sleeve 14 and a sliding column 15, the bottom wall of the sliding column 15 is provided with a plurality of threaded holes 16, and the bottom wall of the sliding sleeve 14 is in threaded connection with two fixing bolts 17.

One end of the rotating shaft 11 far away from the driving gear 12 penetrates through and extends to the outside of the main body 1 and is fixedly connected with an operation block 13, an inner hexagonal hole is formed in the operation block 13, and the operation block 13 is conveniently rotated by an inner hexagonal wrench.

Two opposite inside walls of the through hole 2 are respectively connected with a connecting column 3 through bearing rotation, one end of the connecting column 3, which is close to the mounting block 4, is fixedly connected with the side wall of the mounting block 4, and certain damping exists at the rotation connection part of the connecting column 3 and the inside wall of the through hole 2, so that the connecting column is prevented from rotating under the dead weight of the supporting plate 8.

The size of the driving gear 12 is smaller than that of the driven gear 9, and the snack driving gear 12 drives the driven gear 9 with a large size to rotate, so that the driving support plate 8 is propped against the roadway side to support, larger supporting force can be generated with smaller force, the stability of supporting is ensured, and meanwhile, the labor is saved.

The screw lead angle of the screw rod 7 is smaller than the equivalent friction angle of a screw pair formed by the screw thread cylinder 6 and the screw rod 7, so that the screw thread connection between the screw thread cylinder 6 and the screw rod 7 realizes self-locking, thereby avoiding the shaking condition at the screw thread connection position and ensuring the stability of the support anti-ledge structure.

In the utility model, the anti-ledge structure is arranged in a roadway to be supported, and the two fixing bolts 17 are screwed out according to the width of the roadway, so that the sliding column 15 slides in the sliding sleeve 14, the distance between the two main bodies 1 is changed, after the distance is changed to a proper distance, the two fixing bolts 17 are screwed into the threaded holes 16 on the sliding column 15, and the distance between the two main bodies 1 is fixed.

After the distance is adjusted, the installation block 4 is rotated, the inclination of the supporting plate 8 is adjusted, the inclination of the supporting plate is consistent with that of a roadway wall, then the operating block 13 is rotated through an inner hexagonal wrench, the operating block 13 drives the rotating shaft 11 to rotate, so that the driving gear 12 in interference fit with the rotating shaft 11 rotates, the driving gear 12 drives the two driven gears 9 meshed with the driving gear to rotate, the driven gears 9 rotate to drive the threaded cylinder 6 in interference fit with the driven gears to rotate, the threaded cylinder 6 rotates to enable the screw rod 7 to unscrew through threaded connection, the supporting plate 8 is driven to be close to the roadway wall and cling to the roadway wall, and accordingly the roadway wall is supported to be loose for demonstration.

The foregoing is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto, and any person skilled in the art should be able to substitute or change the technical solution and the inventive conception according to the present utility model within the scope of the present utility model.

Claims (6)

1. The utility model provides a side structure is prevented to colliery tunnel, includes two main parts (1), a serial communication port, through-hole (2) have been seted up to main part (1), through-hole (2) inside wall rotates and is connected with installation piece (4), installation piece (4) roof and the equal fixedly connected with fixed block (5) of diapire, fixed block (5) run through the bearing and rotate and be connected with screw barrel (6), screw barrel (6) threaded connection has screw rod (7), two screw rod (7) are located screw barrel (6) outside one end fixedly connected with backup pad (8) jointly, screw barrel (6) interference fit has driven gear (9), functional hole (10) have been seted up to main part (1), main part (1) are connected with pivot (11) through the bearing run through rotation, pivot (11) one end runs through and extends to in functional hole (10) and interference fit has drive gear (12), drive gear (12) jointly with two driven gear (9) meshing.

2. The coal mine roadway ledge preventing structure according to claim 1, wherein two side walls on opposite sides of the main body (1) are fixedly connected with a sliding sleeve (14) and a sliding column (15) respectively, a plurality of threaded holes (16) are formed in the bottom wall of the sliding column (15), and two fixing bolts (17) are connected with the bottom wall of the sliding sleeve (14) in a threaded mode.

3. The coal mine roadway ledge preventing structure according to claim 1, wherein one end of the rotating shaft (11) far away from the driving gear (12) penetrates through and extends to the outside of the main body (1) and is fixedly connected with an operation block (13), and the operation block (13) is provided with an inner hexagonal hole.

4. The coal mine roadway ledge preventing structure according to claim 1, wherein two opposite inner side walls of the through hole (2) are respectively connected with a connecting column (3) through bearings in a rotating mode, and one end, close to the mounting block (4), of the connecting column (3) is fixedly connected with the side wall of the mounting block (4).

5. A coal mine roadway ledge prevention structure as claimed in claim 1, wherein the size of the driving gear (12) is smaller than the size of the driven gear (9).

6. The coal mine roadway ledge preventing structure according to claim 1, wherein the thread lead angle of the screw (7) is smaller than the equivalent friction angle of a screw pair formed by the thread cylinder (6) and the screw (7).