CN218934442U

CN218934442U - Roadway support structure

Info

Publication number: CN218934442U
Application number: CN202223197842.XU
Authority: CN
Inventors: 纪宝柱; 周宜山; 李君�; 刘洋; 桑传伟; 刘兴臣; 牛洋洋; 李迪
Original assignee: Anhui Bozhou Coal Industry Co ltd
Current assignee: Anhui Bozhou Coal Industry Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-28
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a roadway support structure, which relates to the field of roadway support and comprises a supporting beam, wherein a concrete layer is arranged on the outer side of the supporting beam, a plurality of steel belts are arranged on the inner side of the supporting beam, a first anchor rope and a second anchor rope are arranged in the middle of each steel belt and are positioned at the top end of the supporting beam, the plurality of first anchor ropes and the plurality of second anchor ropes are respectively arranged on the top end and the two sides of the supporting beam, the concrete layer is formed by grouting on the inner side of the roadway, one ends of the first anchor ropes and one end of the second anchor ropes are fixed through deep grouting, the side strength of the supporting beam is enhanced through the second anchor ropes fixed on the side, meanwhile, the strength of the top end of the supporting beam is enhanced due to the grouting on one end of the first anchor ropes and one end of the second anchor ropes, the supporting beam is supported and fixed on surrounding rocks of the roadway, the side bottom end of the supporting beam is connected with the first anchor rods, the first anchor rods are connected into a whole, the supporting beam bottom plate surface support rigidity is improved, and the effective support area is increased.

Description

Roadway support structure

Technical Field

The utility model relates to the field of roadway support, in particular to a roadway support structure.

Background

The tunnel support is an important structure affecting the underground construction progress of a coal mine, so that the stability of the tunnel support is directly related to the personal safety of workers, at present, the anchor bolt support is used for supporting, but because the anchor bolt support is provided with an anchor rope and an anchor bolt at the top end, the movement of surrounding rocks can not be alleviated and reduced only through the anchor rope and the anchor bolt, and because the anchor bolt support structure is obviously different from the surrounding rocks of the tunnel in the aspects of material rigidity, strength, deformation characteristics, structural characteristics and the like, when the surrounding rocks of the tunnel are moved and broken, the roof of the anchor bolt support is caused to sink, the U-shaped steel at the top is bent, the anchor bolt breaks at the position of a tray, and the lock leg beams break, bend and move backwards, therefore, the tunnel support structure capable of fixing the surrounding rocks of the tunnel and reinforcing the roof by two sides is provided.

Disclosure of Invention

The utility model aims to solve the following problems in the prior art: because the anchor bolt support is that anchor ropes are arranged at the top ends and anchor rods are arranged at the outer sides, the movement of surrounding rocks can not be alleviated and reduced only through the anchor ropes and the anchor rods, and because the anchor bolt support structure is obviously different from the surrounding rocks of a roadway in the aspects of material rigidity, strength, deformation characteristics, structural characteristics and the like, when the surrounding rocks of the roadway are moved and broken, the anchor bolt support top plate can be caused to sink, the top U-shaped steel is bent, the anchor rods are broken at the positions of the trays, and the leg locking beams are broken, bent and moved backwards.

In order to solve the problems in the prior art, the utility model provides a roadway support structure, which comprises a support beam, wherein a concrete layer is arranged on the outer side of the support beam, a plurality of steel belts are arranged on the inner side of the support beam, a first anchor rope and a second anchor rope are arranged at the middle part of the steel belts and positioned at the top end of the support beam, a third anchor rope and a second anchor rope are arranged at the two sides of the support beam and positioned at the middle part of the steel belts, and a first anchor rod is arranged at the two sides of the bottom end of the support beam and positioned at the middle part of the steel belts.

Preferably, a plurality of first grouting pipes and second grouting pipes are arranged at the top end and the two sides of the supporting beam, the first anchor rope and the second anchor rope are positioned on the inner side of the second grouting pipe, the first anchor rod, the second anchor rod and the third anchor rod are positioned on the inner side of the first grouting pipe, one end of the first anchor rope and one end of the second anchor rope are fixed in the deep of a roadway through grouting, and the first anchor rope, the second anchor rope and grouting are connected to form a supporting shell.

Preferably, the number of the first anchor lines at the top end of the support beam is seven, the first anchor lines have six rows, the row spacing is 800mm×1100mm, the number of the second anchor lines at the top end of the support beam is six, the second anchor lines have six rows, the row spacing is 800mm×1100mm, and the structure is used for supporting the top end of the support beam.

Preferably, the third anchor rods at the top end of the side surface of the support beam are provided with five rows, the row spacing is 800mm, the transverse number of the third anchor rods and the second anchor rods at the middle part of the side surface of the support beam is three, the third anchor rods and the second anchor rods at the middle part of the side surface of the support beam are provided with four rows, the row spacing is 800mm multiplied by 1100mm, and the structure is used for controlling the expansion deformation of surrounding rock by using the fixation constraint of the inside and outside of the anchor rods.

Preferably, the shape of the supporting beam is in a circular arc shape, the outer side of the supporting beam is 3600mm in height and 5345mm in width, and the structure is used for avoiding stress concentration of the supporting beam.

Preferably, a tray is arranged at one end of the second anchor rod and positioned on the side surface of the steel belt, the size of the tray is 150mm multiplied by 10mm, and the structure is used for enhancing the firmness of the second anchor rod.

Preferably, a metal net is arranged on the outer side of the supporting beam and on the inner side of the concrete layer.

Preferably, the length of the first anchor cable is the same as that of the second anchor cable, and the length of the first anchor cable is larger than that of the second anchor cable and the third anchor cable.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, a plurality of first anchor cables and a plurality of second anchor cables are respectively arranged at the top end and two sides of the supporting beam, concrete layers are formed by grouting at the inner sides of the roadway, one ends of the first anchor cables and the second anchor cables are fixed by deep grouting, the side edge strength of the supporting beam is enhanced by the second anchor cables, meanwhile, the strength of the top end of the supporting beam is enhanced by the second anchor cables fixed at the side surfaces, meanwhile, the supporting beam supports and fixes surrounding rocks of the roadway by grouting at one ends of the first anchor cables and the second anchor cables, the first anchor rods are connected with the bottom ends of the side surfaces of the supporting beam, and the first anchor rods are connected into a whole, so that the supporting rigidity of the bottom plate surface of the supporting beam is improved, and the effective supporting area is increased.

Drawings

FIG. 1 is an enlarged schematic view of an anchor line of the present utility model;

FIG. 2 is an enlarged schematic view of the support beam of the present utility model;

FIG. 3 is a schematic cross-sectional view of a concrete layer of the present utility model;

FIG. 4 is an enlarged schematic view of a second anchor rod of the present utility model;

FIG. 5 is a schematic diagram of the overall structure of the present utility model;

reference numerals: 1. a support beam; 2. a first grouting pipe; 3. a first anchor rod; 4. a first anchor cable; 5. a second anchor rod; 6. a third anchor rod; 7. a second anchor cable; 8. a second grouting pipe; 9. a steel strip; 10. a concrete layer; 11. a metal mesh; 12. and a tray.

Detailed Description

In order that the manner in which the above recited features, objects and advantages of the present utility model are obtained, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, those skilled in the art can obtain other examples without making any inventive effort, which fall within the scope of the utility model.

Specific embodiments of the present utility model are described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1-4, a roadway support structure is assembled by the following components:

and (3) assembly description: firstly grouting surrounding rock at the shallow part of a roadway to form a concrete layer 10, placing a metal net 11 on the inner side of the concrete layer 10, fixing the metal net 11 through a supporting beam 1, fixing the supporting beam 1 on the inner side of the roadway, arranging anchoring holes between the supporting beams 1, arranging a first grouting pipe 2 and a second grouting pipe 8 on the inner side of the anchoring holes, arranging one ends of the first anchor rope 4 and the second anchor rope 7 on the inner side of the anchoring holes through the second grouting pipe 8, arranging one ends of the first anchor rope 3, the second anchor rope 5 and the third anchor rope 6 on the inner side of the anchoring holes through the first grouting pipe 2, arranging the other ends of the first anchor rope 3, the first anchor rope 4, the second anchor rope 5 and the third anchor rope 6 on the steel belt 9 through the supporting beams 1, sleeving a tray 12 on one side of the steel belt 9 at the same time, arranging one ends of the second anchor rope 5 and the third anchor rope 6 on the steel belt 9 on the inner side of the anchoring holes through the first grouting pipe 2, and rapidly grouting the second grouting pipe 8, and rapidly grouting the characteristics and expanding.

Description of working principle: the surrounding rock of the shallow part of the roadway is grouted to form a concrete layer 10 to seal broken surrounding rock around the roadway, so that the strength of broken crack surrounding rock of the roadway bottom plate is improved, a continuous strong stress shell is formed around the roadway to resist displacement deformation of the surrounding rock, a complete surrounding rock self-supporting structure is formed, the shallow part grouting can effectively prevent the influence of water of the roadway bottom plate on the roadway bottom plate, one end of each of the first anchor cable 4 and the second anchor cable 7 is deeply grouted and fixed on the inner side of an anchoring hole of the roadway, the first anchor cable 4, the second anchor cable 7, the steel belt 9, the supporting beam 1 and the roadway form a bearing shell, the solidified grouting provides a root for the anchor cable, the deep grouting enables the surrounding rock to have a self-supporting structure, the deep surrounding rock is reinforced, the deep surrounding rock is prevented from spreading and expanding due to the stress and deformation, one end of the first anchor rod 3 is fixed on the inner side of an anchoring hole of the roadway through grouting, a high-strength large-area tray protecting table is adopted, meanwhile, the adjacent anchor cable bundles are connected through steel beams to form a continuous supporting structure, the supporting rigidity of the surface of the bottom plate is improved, the supporting area is increased, and the supporting area of the supporting beam is shaped like an arch, and the supporting beam is prevented from concentrating stress.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a tunnel supporting construction which characterized in that: including supporting beam (1), the outside of supporting beam (1) is equipped with concrete layer (10), the inboard of supporting beam (1) is equipped with a plurality of steel bands (9), the middle part of steel band (9) and the top that is located supporting beam (1) are equipped with first anchor rope (4) and second stock (5), the both sides of supporting beam (1) and the middle part that is located steel band (9) are equipped with third stock (6) and second anchor rope (7), the bottom both sides of supporting beam (1) and the middle part that is located steel band (9) are equipped with first stock (3).

2. The roadway support structure of claim 1, wherein: the top and the both sides of supporting beam (1) all are equipped with a plurality of first slip casting pipe (2) and second slip casting pipe (8), first anchor rope (4), second anchor rope (7) are located the inboard of second slip casting pipe (8), first stock (3), second stock (5), third stock (6) are located the inboard of first slip casting pipe (2).

3. The roadway support structure of claim 1, wherein: the transverse number of the first anchor ropes (4) at the top end of the supporting beam (1) is six, the first anchor ropes (4) are arranged in six rows, the row spacing is 800mm multiplied by 1100mm, the transverse number of the second anchor ropes (5) at the top end of the supporting beam (1) is seven, the second anchor ropes (5) are arranged in six rows, and the row spacing is 800mm multiplied by 1100mm.

4. The roadway support structure of claim 1, wherein: the third anchor rods (6) at the top ends of the side surfaces of the supporting beam (1) are provided with five rows, the row spacing of the third anchor rods (6) and the second anchor cables (7) at the middle parts of the side surfaces of the supporting beam (1) are three, the third anchor rods (6) and the second anchor cables (7) at the middle parts of the side surfaces of the supporting beam (1) are provided with four rows, and the row spacing of the third anchor rods and the second anchor cables (7) is 800mm multiplied by 1100mm.

5. The roadway support structure of claim 1, wherein: the shape of the supporting beam (1) is in a circular arc shape, and the outer side of the supporting beam (1) is 3600mm in height and 5345mm in width.

6. The roadway support structure of claim 1, wherein: one end of the second anchor rod (5) is provided with a tray (12) positioned on the side face of the steel belt (9), and the size of the tray (12) is 150mm multiplied by 10mm.

7. The roadway support structure of claim 1, wherein: the metal net (11) is arranged on the outer side of the supporting beam (1) and on the inner side of the concrete layer (10).

8. The roadway support structure of claim 1, wherein: the length of the first anchor rope (4) is the same as that of the second anchor rope (7), and the length of the first anchor rope (4) is larger than that of the second anchor rod (5) and the third anchor rod (6).