CN219412616U - Gob entry keeps off gangue pillar structure with contractibility - Google Patents
Gob entry keeps off gangue pillar structure with contractibility Download PDFInfo
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- CN219412616U CN219412616U CN202320797756.8U CN202320797756U CN219412616U CN 219412616 U CN219412616 U CN 219412616U CN 202320797756 U CN202320797756 U CN 202320797756U CN 219412616 U CN219412616 U CN 219412616U
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Abstract
The utility model discloses a retractable gob-side entry retaining gangue blocking pillar structure which comprises an upper section of I-shaped steel column, a lower section of I-shaped steel column and a clamping assembly, wherein a notch with an opening from the top is arranged on a lower web plate of the lower section of I-shaped steel column, a friction plate is arranged in the notch, the upper section of I-shaped steel column is connected with the notch in a sliding manner through the clamping of the upper web plate and the notch, the clamping assembly is sleeved outside the upper section of I-shaped steel column and the lower section of I-shaped steel column and is used for clamping the upper section of I-shaped steel column and the lower section of I-shaped steel column, a bottom anchor plate for installing an anchor rod is arranged at the bottom edge of the lower section of I-shaped steel column, round steel is welded at the top of the upper web plate of the upper section of I-shaped steel column, the I-shaped steel column has high strength, higher bending strength and bending rigidity, the gangue blocking supporting height can be adjusted according to the on-site roadway height, and the sinking of a roof plate is prevented from bending caused by overlarge pressure.
Description
Technical Field
The utility model relates to the field of retaining and gangue blocking support, in particular to a retractable gob-side entry retaining and gangue blocking support structure.
Background
Along with the application of the technology of roof cutting, pressure relief and gob-side entry retaining of coal pillar-free exploitation, the technology has profound significance for full exploitation of coal, but at present, a rigid device is often adopted for roadside gangue blocking support of gob-side entry retaining, the stress of a deep roadway is high, the dynamic pressure influence is obviously improved, the roadway deformation is serious, and particularly, the side wall of a gob-side entry retaining broken stone is serious. The rigid gangue blocking support is often bent and broken due to the fact that the rigid gangue blocking support cannot adapt to large deformation of deep surrounding rock, so that the gangue blocking support capability is lost, and the retaining is failed.
Aiming at the problems, the gangue blocking column used in the technology of the non-coal column roof cutting pressure relief gob-side entry retaining is optimized and improved, and the design of the retractable gangue blocking column which has excellent bearing performance and can adapt to roadway deformation yielding is very practical.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a retractable gob-side entry retaining gangue blocking pillar structure.
The aim of the utility model is realized by the following technical scheme:
the utility model provides a gob entry retaining gangue-blocking pillar structure with contractibility, includes section I-steel column, lower section I-steel column and blocks and hold the subassembly, be equipped with on the lower web of section I-steel column down from open-ended grooving, the grooving is inside to be equipped with the friction disc, the joint and the section I-steel column sliding connection of section I-steel column through last web and grooving down, block subassembly cover is established in section I-steel column and the outside of section I-steel column down and is used for pressing from both sides tight section I-steel column and section I-steel column down, section I-steel column bottom edge is equipped with the bottom anchor board that is used for installing the stock down, and the welding of section I-steel column's last web top has the round steel.
In the above summary, further, the upper section of i-steel column and the lower section of i-steel column are of the same type and are of the same type, the length of the upper section of i-steel column is 1500mm, and the length of the lower section of i-steel column is 2000mm.
In the above summary, further, the length of the slot on the lower section of i-steel column is 1500mm.
In the above summary, further, the insertion length of the upper section of i-steel column and the lower section of i-steel column is 1000mm.
In the above summary, further, two sets of clamping assemblies are arranged outside the upper section of the i-beam column and the lower section of the i-beam column, the clamping assemblies are composed of a U-shaped mounting sleeve, a mounting plate and bolts, and the U-shaped mounting sleeve is sleeved outside the upper section of the i-beam column and the lower section of the i-beam column and clamps the upper section of the i-beam column and the lower section of the i-beam column through the mounting plate and the bolts.
In the above summary, further, the friction plate has a certain taper.
In the above summary of the utility model, further, a slot is provided on the bottom anchor plate, the width of the slot is 18mm, the diameter of the anchor rod is 18mm, the length is 500mm, and the anchor rod penetrates through the slot and penetrates into the roadway bottom plate.
In the above summary, further, the radius of the round steel is 32mm, the length is 200mm, and the round steel is arranged at an angle of 15 ° with respect to the vertical direction and inserted into the blast hole of the top plate.
The beneficial effects of the utility model are as follows:
1. the pillar has simple structure and high strength, has obvious gob-side entry retaining gangue blocking supporting strength, and compared with the U-shaped steel pillar in the prior art, the I-shaped steel has higher bending strength and bending rigidity, and improves the stability of the gob-side entry retaining side roadway wall.
2. According to the utility model, the gangue blocking support height can be adjusted according to the height of a field roadway, so that the problem that the gangue blocking column is bent and deformed by the pressure of the top plate can be solved, when the top plate is submerged under the influence of mining, after the top plate is pressed to exceed the friction force born by the clamping cable, the upper section I-shaped steel column starts to slide, and as the sliding is continuously increased, the supporting column bearing capacity is matched with the load of the top plate to realize the stability of the top plate, the sinking of the top plate is buffered, and meanwhile, the gangue blocking column is protected from bending caused by overlarge pressure.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a side view of the cable assembly of the present utility model;
fig. 5 is another view of the inventive cable assembly.
In the figure, the steel column comprises a 1-upper section I-shaped steel column, a 2-lower section I-shaped steel column, 3-round steel, a 4-upper web plate, a 5-clamping assembly, a 6-U-shaped mounting sleeve, 7-friction plates, 8-mounting plates, 9-bolts, 10-cutting grooves, 11-bottom anchor plates, 12-anchor rods and 13-lower web plates.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
Examples:
in the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must be provided with a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1-5, the gob-side entry retaining gangue prop structure with contractibility comprises an upper section of i-beam column 1, a lower section of i-beam column 2 and a clamping assembly 5, wherein a notch 10 with an opening from the top is arranged on a lower web 13 of the lower section of i-beam column 2, a friction plate 7 is arranged in the notch 10, the upper section of i-beam column 1 is connected with the notch 10 in a sliding manner through a clamping manner of the upper web 4 and the lower section of i-beam column 2, the clamping assembly 5 is sleeved outside the upper section of i-beam column 1 and the lower section of i-beam column 2 and is used for clamping the upper section of i-beam column 1 and the lower section of i-beam column 2, a bottom anchor plate 11 for installing an anchor rod 12 is arranged at the bottom edge of the lower section of i-beam column 2, the bottom anchor plate 11 faces back to a goaf during installation, a round steel 3 is welded at the top of the upper web 4 of the upper section of i-beam column 1, and the round steel 3 faces the goaf during installation.
In the above embodiment, preferably, the upper section of i-steel column 1 and the lower section of i-steel column 2 are identical type of mining i-steel, the length of the upper section of i-steel column 1 is 1500mm, and the length of the lower section of i-steel column 2 is 2000mm.
In the above embodiment, preferably, the length of the cutting groove 10 on the lower section i-steel column 2 is 1500mm. Specifically, the slot 10 extends from the top opening of the lower web 13 and down to 1500mm.
In the above embodiment, preferably, the plugging length of the upper section i-steel column 1 and the lower section i-steel column 2 is 1000mm. Specifically, because the length of the slot 10 is 1500mm, the splicing length of the upper section i-steel column 1 and the lower section i-steel column 2 is 1000mm, so that the retractable amount of 500mm can be allowed, when the roof is affected by mining to sink, after the roof is pressed to exceed the friction force born by the clamping assembly 5, the upper section i-steel column 1 starts to slide, and as the sliding is continuously increased, the bearing capacity of the support column is matched with the load of the roof to realize the stability of the roof when the roof is lowered to a certain height, the sinking of the roof is buffered, and meanwhile, the gangue blocking column is protected from bending caused by overlarge pressure.
The outer parts of the upper section of I-shaped steel column 1 and the lower section of I-shaped steel column 2 are provided with two groups of clamping assemblies 5, each clamping assembly 5 consists of a U-shaped mounting sleeve 6, a mounting plate 8 and a bolt 9, and each U-shaped mounting sleeve 6 is sleeved outside the upper section of I-shaped steel column 1 and the lower section of I-shaped steel column 2 and clamps the upper section of I-shaped steel column 1 and the lower section of I-shaped steel column 2 through the mounting plate 8 and the bolt 9. When the upper section I-steel column 1 and the lower section I-steel column 2 are installed, the upper section I-steel column 1 and the lower section I-steel column 2 are firmly clamped through the two groups of clamping components 5, and then the reinforcing anchor rods 12 are installed, so that a telescopic support structure acting on the side roadway of the retaining roadway and playing a role in gangue blocking is formed.
In the above embodiment, it is preferable that the friction plate 7 has a certain taper. Specifically, when the roof is affected by mining to sink, the upper section i-beam column 1 starts to slide downwards along the cutting groove 10, and the sliding resistance increase of the upper section i-beam column 1 can be realized through the friction plate 7 with a certain taper arranged in the cutting groove 10, so that the sinking of the roof is buffered.
In the above embodiment, preferably, the bottom anchor plate 11 is provided with a slot, the width of the slot is 18mm, the diameter of the anchor rod 12 is 18mm, the length of the anchor rod 12 is 500mm, and the anchor rod 12 penetrates through the slot and penetrates into the roadway bottom plate, so as to fix the whole pillar.
In the above embodiment, preferably, the radius of the round steel 3 is 32mm, the length is 200mm, and the round steel 3 is disposed at an angle of 15 ° to the vertical direction and inserted into the blast hole of the top plate.
The specific working process comprises the following steps:
before installation, the placing position of gangue blocking columns is selected on the roadway bottom plate, the bottom plate is tamped, broken stones at the corresponding positions of the top plate are cleaned and leveled, and pits with the diameter of 200-300mm can be reserved for inserting the lower columns, and the method is specifically determined by practice.
When the gangue blocking column is installed, a groove 10 with the length of 1500mm needs to be machined at the bottom end of a lower web plate 13 of a lower section of I-shaped steel column 2 in advance, a bottom anchor plate 11 is welded at the distance from the column bottom of the lower section of I-shaped steel column 2, a friction plate 7 is placed in the groove 10, round steel 3 with the diameter of 32mm and the length of 200mm needs to be welded at one end of an upper web plate 4 of an upper section of I-shaped steel column 1 in advance, the angle is 15 degrees with the vertical direction, the angle faces a goaf, and then the upper web plate 4 is inserted into the groove 10, so that column operation can be performed; in the process of upright post operation, the lower section I-shaped steel column 2 is inserted into a reserved pit of a roadway bottom plate, so that the bottom anchor plate 11 is tightly attached to the surface of the bottom plate and faces away from the goaf, and round steel 3 is inserted into a preset blast hole, so that the whole upright post is fixed; and then controlling the splicing length of the two H-shaped steel columns to be about 1000mm, then connecting the lower end part of the upper section of H-shaped steel column 1 with the upper end part of the lower section of H-shaped steel column 2 through two groups of clamping assemblies 5, screwing all bolts 9, and finally installing an anchor rod 12 with the diameter of 18mm and the length of 500mm at the bottom anchor plate 11 to complete the assembly of the gangue blocking column.
In the supporting process, the round steel 3 and the anchor rods 12 play roles in reinforcing the positions of the support posts and fixing the support posts, and the support posts are prevented from being invalid in advance due to overlarge lateral sliding or offset in the supporting process.
The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (8)
1. The utility model provides a gob entry retaining gangue prop structure with contractibility, its characterized in that includes upper segment I-steel column (1), lower segment I-steel column (2) and clamps subassembly (5), be equipped with on lower web (13) of lower segment I-steel column (2) from open-top grooving (10), the inside friction disc (7) that is equipped with of grooving (10), joint and lower segment I-steel column (2) sliding connection of upper segment I-steel column (1) through upper web (4) and grooving (10), clamp subassembly (5) cover is established the outside of upper segment I-steel column (1) and lower segment I-steel column (2) and is used for pressing from both sides tight upper segment I-steel column (1) and lower segment I-steel column (2), and lower segment I-steel column (2) bottom edge is equipped with bottom anchor plate (11) that are used for installing stock (12), and upper web (4) top welding of upper segment I-steel column (1) has round steel (3).
2. The gob-side entry retaining gangue prop structure with the contractibility according to claim 1 is characterized in that the upper section of I-steel column (1) and the lower section of I-steel column (2) are of the same type of mining I-steel, the length of the upper section of I-steel column (1) is 1500mm, and the length of the lower section of I-steel column (2) is 2000mm.
3. The retractable gob-side entry retaining gangue prop structure according to claim 2, wherein the length of the cutting groove (10) on the lower section i-steel column (2) is 1500mm.
4. The gob-side entry retaining gangue prop structure with contractibility according to claim 3, wherein the plugging length of the upper section I-steel column (1) and the lower section I-steel column (2) is 1000mm.
5. The gob-side entry retaining gangue prop structure with contractibility according to claim 4 is characterized in that two groups of clamping assemblies (5) are arranged outside an upper section of I-steel column (1) and a lower section of I-steel column (2), each clamping assembly (5) consists of a U-shaped mounting sleeve (6), a mounting plate (8) and a bolt (9), and each U-shaped mounting sleeve (6) is sleeved outside the upper section of I-steel column (1) and the lower section of I-steel column (2) and clamps the upper section of I-steel column (1) and the lower section of I-steel column (2) through the mounting plate (8) and the bolts (9).
6. A gob-side entry retaining gangue prop structure with contractibility according to claim 1, characterized in that the friction plate (7) has a taper.
7. The retractable gob-side entry retaining gangue prop structure according to claim 1, wherein the bottom anchor plate (11) is provided with a slot, the width of the slot is 18mm, the diameter of the anchor rod (12) is 18mm, the length of the anchor rod is 500mm, and the anchor rod (12) penetrates through the slot and penetrates into the roadway floor.
8. The retractable gob-side entry retaining gangue prop structure according to claim 1, wherein the round steel (3) has a radius of 32mm and a length of 200mm, and the round steel (3) is arranged at an angle of 15 ° to the vertical direction and is inserted into a roof blast hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320797756.8U CN219412616U (en) | 2023-04-12 | 2023-04-12 | Gob entry keeps off gangue pillar structure with contractibility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320797756.8U CN219412616U (en) | 2023-04-12 | 2023-04-12 | Gob entry keeps off gangue pillar structure with contractibility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219412616U true CN219412616U (en) | 2023-07-25 |
Family
ID=87209224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320797756.8U Active CN219412616U (en) | 2023-04-12 | 2023-04-12 | Gob entry keeps off gangue pillar structure with contractibility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219412616U (en) |
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2023
- 2023-04-12 CN CN202320797756.8U patent/CN219412616U/en active Active
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