CN110905570A

CN110905570A - A stock anchor beam supporting construction for coal mine tunnel

Info

Publication number: CN110905570A
Application number: CN201911263917.XA
Authority: CN
Inventors: 武泉森; 武泉林; 郑逸群; 卓金龙
Original assignee: Jining University
Current assignee: Jining University
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-03-24
Anticipated expiration: 2039-12-10
Also published as: CN110905570B

Abstract

The invention discloses an anchor rod and anchor beam supporting structure for a coal mine tunnel, which comprises an anchor rod and an anchor beam, wherein the anchor beam is fixed outside a foundation pit by adopting a long stud, a through hole is formed in the middle of the anchor beam for passing through the anchor rod, one end of the anchor rod extends into the foundation pit, the other end of the anchor rod extends out of the anchor beam, a hole seam forming assembly and a grouting assembly are arranged inside the anchor rod, the hole seam forming assembly is used for forming a plurality of hole seams communicated with the long stud in the foundation pit, the grouting assembly is used for injecting grout into the foundation pit and integrally solidifying with the long stud through the hole seams, so that the anchor rod and the anchor beam are mutually supported, the anchoring area is increased, the anchoring strength is improved, the construction quality is improved, in the invention, the grouting is carried out on a wall body supporting plate, a connecting seat and a base through external grouting equipment, so that the wall body supporting plate, the connecting seat, better provides support for the roadway.

Description

A stock anchor beam supporting construction for coal mine tunnel

Technical Field

The invention relates to the technical field of coal mine tunnel construction, in particular to an anchor rod and anchor beam supporting structure for a coal mine tunnel.

Background

Roadways, which are the most important channels in coal mines, have multiple functions including lifting, transportation, ventilation, drainage and power supply for mining, and are classified into 3 categories according to the relationship between the long axis of the roadway and the horizontal plane: upright tunnel, horizontal tunnel, inclined roadway, multiple tunnel all need adopt supporting construction to support for it, guarantees follow-up constructor's safety.

At present, the existing supporting structure often has the condition that anchorage is not strong, and some adopt the stock to connect the backplate, and it only utilizes the frictional force between screw thread on the stock and the foundation ditch to anchor, and obviously its anchorage is less strong, and some adoption slip casting reach further reinforced purpose, but wherein thick liquid and the earth in the foundation ditch anchoring that can not be fine.

Accordingly, one skilled in the art provides a bolting and bolting structure for a coal mine tunnel to solve the problems set forth in the above background art.

Disclosure of Invention

The invention aims to provide an anchor rod and anchor beam supporting structure for a coal mine roadway, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an anchor rod anchor beam supporting construction for coal mine tunnel, its includes stock and anchor beam, the anchor beam adopts the long post nail to fix outside the foundation ditch, the through-hole has been seted up at the middle part of anchor beam and has been used for passing through the stock, the one end of stock stretches into in the foundation ditch, and its other end stretches out the anchor beam, the inside of stock is provided with aperture forming assembly and slip casting subassembly, aperture forming assembly is used for forming a plurality of apertures that are linked together with the long post nail in the foundation ditch, the slip casting subassembly is used for injecting the thick liquid and solidifies through aperture and long post nail an organic whole in the foundation ditch.

Further, preferably, the anchor beam is in a shape of a Chinese character ji, and 6 long studs are uniformly arranged on each side of the anchor beam.

Further, as preferred, the stock includes a support section of thick bamboo and thread bush, the one end of a support section of thick bamboo is closed, and its other end is open, the coaxial fixed cover of thread bush is established in the outside of a support section of thick bamboo.

Further, as preferred, still include wall body supporting component, wall body supporting component is including tightening sleeve, roof, wall body backup pad and backup pad, wherein, tightening sleeve establishes on the outer circumference of stock and withstands the anchor beam and adopt the elasticity circle to fasten, the one end that the anchor beam was kept away from to tightening sleeve is fixed with the roof, the roof cover is established on the outer circumference of stock, the roof still with backup pad fixed connection, the backup pad is trapezoidal, and its middle part has been seted up the quad slit and has been used for making the roof embedding wherein and rather than welded fastening, vertical one side of backup pad links to each other with the wall body backup pad is fixed to thereby carry out biography power through roof and backup pad and support the wall body backup pad.

Further, as preferred, the tightening sleeve is round platform shape, and a plurality of tightening grooves are evenly arranged on the tightening sleeve, so that the tightening sleeve can be opened and closed, and the elastic ring is of a hoop structure.

Further, as preferred, the wall body backup pad is last to be seted up the through-hole for fixed embedding water stop collar, the water stop collar still imbeds in the foundation ditch.

Further, as preferred, the wall setting is hugged closely to the wall backup pad, the inside of wall backup pad is the cavity structure, the bottom of wall backup pad is fixed with the connecting seat, the level one side of connecting seat is fixed with the base, connecting seat and base are the cavity structure, connecting seat, base and backup pad are linked together the setting, and adopt outside slip casting equipment to carry out the slip casting for in its cavity, the backup pad is fixed on the base.

Further, as preferred, the aperture forming subassembly includes interior utricule, high pressure nozzle and screwed pipe, the length that the coaxial inside and interior utricule of stock of fixing of interior utricule is unanimous with the anchor rod length, the position department symmetry that the middle part of interior utricule is close to the tip of long post nail is provided with high pressure nozzle, high pressure nozzle wears out the anchor rod setting, the screwed pipe thread bush is established in the position department that is close to the roof on the stock, the surface of screwed pipe has 6 scale strips in certain angle range array, and this angle is the contained angle of the long post nail of two tip on one side on the anchor beam and the axle center line of stock, still be provided with the marking on the roof, the directional axle center of anchor rod of one end of marking, the axle center of the long post nail of one side tip on the directional anchor beam of the other end of marking.

Further, as preferred, the slip casting subassembly includes drill bit and slip casting pipe, the one end that the stock is close to the screwed pipe is fixed to the slip casting pipe, just during utricule and the slip casting chamber that a supporting cylinder constitutes including the slip casting pipe stretches into, the other end in slip casting chamber adopts connecting pipe and cushion chamber to be linked together, the cushion chamber is linked together with the supporting chamber and sets up, the other end intercommunication in supporting chamber is provided with the slip casting head, connecting pipe, cushion chamber, supporting chamber and slip casting head all set up the inside at the drill bit, just the slip casting head stretches out the drill bit setting.

Further, preferably, the drill bit has a cavity structure inside, and is supported by the support cavity.

Compared with the prior art, the invention has the beneficial effects that: in addition, a plurality of hole seams communicated with the long column nails can be accurately formed in the foundation pit by arranging the scale strips and the marked lines so that the grout is integrally solidified with the long column nails through the hole seams, the anchor rod and the anchor beam are mutually supported, the grout flows out from the bottom of the drill bit to anchor the drill bit and the anchor rod, and the hole seams are filled with the grout during anchoring, so that the anchoring area is increased, the anchoring strength is improved, and the construction quality is improved.

Drawings

Fig. 1 is a schematic perspective view of a bolting-bolting beam supporting structure for a coal mine tunnel;

FIG. 2 is a schematic view of an installation structure of a bolt-anchor beam supporting structure for a coal mine roadway;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a schematic diagram of arrangement of scale bars and marked lines in an anchor rod and anchor beam supporting structure for a coal mine roadway.

In the figure: 1. an anchor rod; 2. tightening the sleeve; 3. tightening the groove; 4. an elastic ring; 5. an anchor beam; 6. long column nails; 7. a top plate; 8. marking lines; 9. a threaded pipe; 10. a scale bar; 11. an inner bladder body; 12. a support cylinder; 13. a threaded sleeve; 14. a water stop sleeve; 15. a wall support plate; 16. a connecting seat; 17. a base; 19. a support plate; 20. a grouting pipe; 21. a drill bit; 22. a connecting pipe; 23. a buffer chamber; 24. a support cavity; 25. a grouting head; 26. a high-pressure spray head.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1-4, the present invention provides a technical solution: the utility model provides an anchor rod anchor beam supporting construction for coal mine tunnel, it includes stock 1 and anchor beam 5, anchor beam 5 adopts long stud 6 to fix outside the foundation ditch, the through-hole has been seted up at the middle part of anchor beam 5 and has been used for through stock 1, during the one end of stock 1 stretched into the foundation ditch, its other end stretched out anchor beam 5, the inside of stock 1 is provided with aperture forming assembly and slip casting subassembly, aperture forming assembly is used for forming a plurality of apertures that are linked together with long stud 6 in the foundation ditch, the slip casting subassembly is used for injecting the thick liquid in the foundation ditch and solidifies through aperture and long stud an organic whole.

In this embodiment, the anchor beam 5 is in a shape of a Chinese character ji, and 6 long studs 6 are uniformly arranged on each side of the anchor beam.

In this embodiment, the anchor rod 1 includes a supporting cylinder 12 and a threaded sleeve 13, one end of the supporting cylinder 12 is closed, the other end thereof is open, and the threaded sleeve 13 is coaxially fixed outside the supporting cylinder 12.

In this embodiment, still include wall body supporting component, wall body supporting component is including tightening sleeve 2, roof 7, wall body backup pad 15 and backup pad 19, wherein, tightening sleeve 2 cover is established on the outer circumference of stock 1 and is withstood anchor beam 5 and adopt elasticity circle 4 to fasten, the one end that anchor beam 5 was kept away from to tightening sleeve 2 is fixed with roof 7, roof 7 cover is established on the outer circumference of stock 1, roof 7 still with backup pad 19 fixed connection, backup pad 19 is trapezoidal, and its middle part has been seted up the quad slit and has been used for making roof 7 imbed wherein and rather than welded fastening, vertical one side and wall body backup pad 15 of backup pad 19 are fixed continuous to thereby carry out biography power through roof 7 and backup pad 19 and support wall body backup pad 15.

In this embodiment, the tightening sleeve 2 is in a circular truncated cone shape, a plurality of tightening grooves 3 are uniformly formed in the tightening sleeve, so that the tightening sleeve 2 can be opened and closed, and the elastic ring 4 is in a hoop structure.

In this embodiment, a through hole is formed in the wall support plate 15 for fixing the embedded water stop sleeve 14, and the water stop sleeve 14 is further embedded in the foundation pit.

In this embodiment, the wall support plate 15 is tightly attached to a wall surface, the inside of the wall support plate 15 is a cavity structure, the bottom of the wall support plate 15 is fixed with a connecting seat 16, a base 17 is fixed on one horizontal side of the connecting seat 16, the connecting seat 16 and the base 17 are both cavity structures, the connecting seat 16, the base 17 and the support plate 19 are communicated with each other, external grouting equipment is adopted for grouting in the cavity of the connecting seat 16, and the support plate 19 is fixed on the base 17.

In this embodiment, the aperture forming assembly comprises an inner capsule 11, a high pressure nozzle 26 and a threaded pipe 9, the inner capsule body 11 is coaxially fixed inside the anchor rod 1, the length of the inner capsule body 11 is consistent with that of the anchor rod 1, the middle part of the inner capsule body 11 is symmetrically provided with high-pressure spray heads 26 at the positions close to the end parts of the long studs 6, the high-pressure spray head 26 penetrates out of the anchor rod 1, the threaded pipe 9 is sleeved on the position, close to the top plate 7, on the anchor rod 1 in a threaded manner, as shown in fig. 4, the outer surface of the threaded pipe 9 is arrayed with 6 scale bars 10 in a certain angular range, the angle is an included angle a between the long stud nails 6 at the two end parts of one side of the anchor beam 5 and the axis connecting line of the anchor rod 1, and a marking 8 is further arranged on the top plate 7, one end of the marking 8 points to the axis of the anchor rod, and the other end of the marking 8 points to the axis of the long stud at the end part of the left side of the anchor beam 5.

In this embodiment, the slip casting subassembly includes drill bit 21 and slip casting pipe 20, slip casting pipe 20 is fixed in the one end that stock 1 is close to screwed pipe 9, just slip casting pipe 20 stretches into in the slip casting chamber that inner utricule 11 and support section of thick bamboo 12 constitute, the other end in slip casting chamber adopts connecting pipe 22 and buffer chamber 23 to be linked together, buffer chamber 23 and support chamber 24 are linked together and are set up, the other end intercommunication in support chamber 24 is provided with slip casting head 25, connecting pipe 22, buffer chamber 23, support chamber 24 and slip casting head 25 all set up the inside at drill bit 21, just slip casting head 25 stretches out drill bit 21 sets up.

In this embodiment, the drill bit 21 has a hollow structure inside, and is supported by the support cavity 24.

In the concrete implementation, the wall support plate 15, the connecting seat 16 and the base 17 are firstly placed, water stop sleeves are embedded into the wall support plate 15 and the foundation pit, the anchor beam 5 is fixed outside the foundation pit through the long-column nails 6, at the moment, grouting is started from the top of the wall support plate 15, the strength of the wall support plate 15 is improved, meanwhile, the wall support plate 15, the connecting seat 16 and the base 17 are connected into a whole, the long-column nails in the anchor beam 5 can fix the support plate 15 on the wall so as to provide support for the wall, then, the anchor rod 1 penetrates through the anchor beam 5 and extends into the foundation pit, the tightening sleeve 2 and the top plate 7 are sleeved on the anchor rod 1, then, the support plate 19 and the support rod 18 are fixed, then, a plurality of hole seams communicated with the long-column nails 6 are formed in the foundation pit by adopting a hole seam forming component, specifically, the position of the high-pressure spray nozzle is firstly adjusted to be aligned with the long-, at this moment, the left end scale strip of the threaded pipe 9 corresponds to the marking 8, high-pressure water is injected into the inner capsule, the high-pressure water is sprayed out through a high-pressure spray head, a hole is formed, water injection is stopped, the anchor rod 1 is rotated, next scale strip on the threaded pipe corresponds to the marking 8, water injection is started, and the like in sequence, a plurality of holes communicated with the long stud 6 are formed in the foundation pit, then grouting is carried out in the foundation pit, grout enters the grouting cavity through the grouting pipe 20 and then flows out through the grouting head, anchoring is carried out, and the grout is integrally solidified with the long stud through the holes, the anchoring strength is improved, the tightening sleeve is fastened on the anchor rod through the tightening ring 4 at the moment, support is provided for the wall body supporting plate through the supporting plate 19, and the threaded pipe 9 can be further tightened.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an anchor rod anchor beam supporting construction for coal mine tunnel, its includes stock (1) and anchor beam (5), its characterized in that, anchor beam (5) adopt long stud (6) to fix outside the foundation ditch, the through-hole has been seted up at the middle part of anchor beam (5) and has been used for passing through stock (1), the one end of stock (1) stretches into in the foundation ditch, and its other end stretches out anchor beam (5), the inside of stock (1) is provided with aperture shaping subassembly and slip casting subassembly, aperture shaping subassembly is used for forming a plurality of apertures that are linked together with long stud (6) in the foundation ditch, the slip casting subassembly is used for injecting the thick liquid and solidifies through aperture and long stud are integrative in the foundation ditch.

2. The anchor rod-anchor beam supporting structure for the coal mine tunnel according to claim 1, wherein the anchor beam (5) is in a shape of a Chinese character 'ji' as a whole, and 6 long studs (6) are uniformly arranged on each side thereof.

3. A rock bolt and anchor beam supporting structure for a coal mine tunnel according to claim 1, characterized in that the rock bolt (1) comprises a supporting cylinder (12) and a threaded sleeve (13), one end of the supporting cylinder (12) is closed, the other end is open, and the threaded sleeve (13) is coaxially and fixedly sleeved outside the supporting cylinder (12).

4. The anchor rod and anchor beam supporting structure for the coal mine roadway is characterized by further comprising a wall supporting component, wherein the wall supporting component comprises a tightening sleeve (2), a top plate (7), a wall supporting plate (15) and a supporting plate (19), the tightening sleeve (2) is sleeved on the outer circumference of the anchor rod (1) and props against the anchor beam (5) and is fastened by an elastic ring (4), the top plate (7) is fixed at one end, away from the anchor beam (5), of the tightening sleeve (2), the top plate (7) is sleeved on the outer circumference of the anchor rod (1), the top plate (7) is further fixedly connected with the supporting plate (19), the supporting plate (19) is trapezoidal, a square hole is formed in the middle of the supporting plate and used for enabling the top plate (7) to be embedded into the supporting plate and welded and fixed with the supporting plate, the vertical side of the supporting plate (19) is fixedly connected with the wall supporting plate (15), and the wall body supporting plate (15) is supported by the top plate (7) and the supporting plate (19) through force transmission.

5. The anchor rod and anchor beam supporting structure for the coal mine roadway is characterized in that the tightening sleeve (2) is in a circular truncated cone shape, a plurality of tightening grooves (3) are uniformly formed in the tightening sleeve (2) so that the tightening sleeve (2) can be opened and closed, and the tightening ring (4) is in a clamping structure.

6. The anchor rod-anchor beam supporting structure for the coal mine roadway is characterized in that a through hole is formed in the wall supporting plate (15) and used for fixing the embedded water stopping sleeve (14), and the water stopping sleeve (14) is further embedded into a foundation pit.

7. The anchor rod and anchor beam supporting structure for the coal mine roadway is characterized in that the wall supporting plate (15) is tightly attached to the wall surface, the inside of the wall supporting plate (15) is of a cavity structure, a connecting seat (16) is fixed at the bottom of the wall supporting plate (15), a base (17) is fixed on one horizontal side of the connecting seat (16), the connecting seat (16) and the base (17) are of cavity structures, the connecting seat (16), the base (17) and the supporting plate (19) are communicated and arranged, grouting is performed in the cavity of the connecting seat (16), the base (17) and the supporting plate (19) by adopting external grouting equipment, and the supporting plate (19) is fixed on the base (17).

8. The anchor rod and anchor beam supporting structure for the coal mine roadway is characterized in that the hole seam forming assembly comprises an inner bag body (11), high-pressure spray heads (26) and a threaded pipe (9), the inner bag body (11) is coaxially fixed inside the anchor rod (1), the length of the inner bag body (11) is consistent with that of the anchor rod (1), the high-pressure spray heads (26) are symmetrically arranged at the positions, close to the end parts of the long column nails (6), of the middle part of the inner bag body (11), the high-pressure spray heads (26) penetrate through the anchor rod (1), the threaded pipe (9) is in threaded sleeve connection with the position, close to the top plate (7), of the anchor rod (1), the outer surface of the threaded pipe (9) is provided with 6 gauge strips (10) in an angular range, and the angle is the included angle between the connecting lines of the long column nails (6) at the two end parts on one side of the anchor beam (5) and the axis of the anchor rod (1), still be provided with marking (8) on roof (7), the axle center of the directional stock of one end of marking (8), the axle center of the long stud of one side tip on the directional anchor roof beam (5) of the other end of marking (8).

9. The anchor rod and anchor beam supporting structure for the coal mine roadway is characterized in that the grouting assembly comprises a drill bit (21) and a grouting pipe (20), the grouting pipe (20) is fixed at one end, close to a threaded pipe (9), of the anchor rod (1), the grouting pipe (20) extends into a grouting cavity formed by an inner bag body (11) and a supporting cylinder (12), the other end of the grouting cavity is communicated with a buffering cavity (23) through a connecting pipe (22), the buffering cavity (23) is communicated with the supporting cavity (24), the other end of the supporting cavity (24) is communicated with a grouting head (25), the connecting pipe (22), the buffering cavity (23), the supporting cavity (24) and the grouting head (25) are arranged inside the drill bit (21), and the grouting head (25) extends out of the drill bit (21).

10. A rock-bolt and anchor beam support construction for a coal mine tunnel according to claim 9, characterised in that the interior of the drill bit (21) is of hollow cavity construction and is supported by a support cavity (24).