CN110939473A - Prefabricated framework pillar for underground coal mine - Google Patents
Prefabricated framework pillar for underground coal mine Download PDFInfo
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- CN110939473A CN110939473A CN201910956025.1A CN201910956025A CN110939473A CN 110939473 A CN110939473 A CN 110939473A CN 201910956025 A CN201910956025 A CN 201910956025A CN 110939473 A CN110939473 A CN 110939473A
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- 239000003245 coal Substances 0.000 title claims abstract description 33
- 239000002002 slurry Substances 0.000 claims abstract description 25
- 239000007787 solid Substances 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/005—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Foundations (AREA)
Abstract
A prefabricated framework pillar for underground coal mine comprises a foundation pillar and a top-connected pillar; the top-connected column comprises a top-connected column longitudinal framework, a top-connected column transverse hoop frame, a top-connected column corrugated pipe and top-connected column slurry; the foundation column is prefabricated on the ground, when the foundation column is used, the prefabricated foundation column is transported to the underground from the ground, the foundation column is fixed at a preset supporting position of an underground gob-side entry retaining, and the top of the foundation column is cast on site to form a top-receiving column. The invention can play a role after being installed, provides support with enough strength, can reduce underground temporary support, and can adapt to the condition of large deformation of the top plate.
Description
Technical Field
The invention relates to a prefabricated framework pillar for underground coal mines.
Background
In the gob-side entry retaining of the underground coal mine, a stack type support is generally adopted for supporting, but the support strength of the stack type support is weaker, the deformation of the roadway is large, and the gob-side entry retaining effect is often unsatisfactory; and because the roadway is deformed greatly, the stack type support can only be disposable and cannot be reused. Moreover, the stack type support usually uses wood, and the forest resource consumption is large.
Disclosure of Invention
In order to solve the problems, the invention provides a prefabricated framework pillar for underground coal mines.
A prefabricated framework pillar for underground coal mine comprises a foundation pillar and a top-connected pillar; the top-connected column comprises a top-connected column longitudinal framework, a top-connected column transverse hoop frame, a top-connected column corrugated pipe and top-connected column slurry; the foundation column longitudinal framework, the foundation column transverse hoop frame, the cavity longitudinal framework, the cavity transverse hoop frame and the cavity fixing ribs form a foundation column hoop, the foundation column corrugated pipe is sleeved on the periphery of the foundation column hoop, and the foundation column slurry is filled in the foundation column corrugated pipe to form a cavity;
the roof connecting column longitudinal framework and the roof connecting column transverse hoop frame form a roof connecting column hoop, the roof connecting column corrugated pipe is sleeved on the periphery of the roof connecting column hoop, and the roof connecting column slurry is filled in the foundation column corrugated pipe;
the foundation column is prefabricated on the ground, when the foundation column is used, the prefabricated foundation column is transported to the underground from the ground, the foundation column is fixed at a preset supporting position of an underground gob-side entry retaining, and the top of the foundation column is cast on site to form a top-receiving column.
In the above-mentioned prefabricated skeleton pillar for the underground coal mine, the foundation pillar is a combination of one or more than one shorter prefabricated skeleton pillar. This is because if a foundation column of the whole body is too heavy, it is difficult to transport the foundation column from the ground to the underground, and the foundation column of the whole body can be divided into a plurality of prefabricated sections, transported by sections during transportation, and finally assembled into a whole body during underground use.
In the prefabricated framework pillar for the underground coal mine, the foundation pillar can be a solid body after slurry is filled, namely, no cavity exists, and particularly, under the condition that a plurality of sections of prefabricated frameworks are combined into one foundation pillar, the weight of a single shorter foundation pillar is greatly reduced compared with that of the whole foundation pillar, and no cavity can be reserved, so that the process of reserving the cavity is reduced.
In the prefabricated framework pillar for the underground coal mine, the top-contacting pillar is prefabricated on the ground. The method considers that when the gob-side entry retaining top plate deforms for a small time, the prefabricated roof connecting column can actually meet the supporting requirement, and the prefabrication can reduce the underground pouring links and avoid inconvenience caused by underground construction.
In the prefabricated framework pillar used below the coal mine, the top-connected pillar also forms a cavity, so that slurry can be saved and a pouring process can be omitted by reserving the cavity if the supporting strength of the top-connected pillar is sufficient. In particular, if the drop post is ground prefabricated, the drop post weight can also be reduced.
In the prefabricated framework pillar for the underground coal mine, an anchor cable hoop is further fixed on the periphery of the top-contacting pillar corrugated pipe.
In the prefabricated framework pillar for the underground coal mine, an anchor cable hoop is further fixed on the periphery of the foundation pillar corrugated pipe.
In the prefabricated framework pillar for the underground coal mine, the number of the foundation pillar segments is more than 2.
In the prefabricated framework pillar for the underground coal mine, the foundation pillar and the top-contacting pillar are both detachable and reassembled.
In the prefabricated framework pillar for the underground coal mine, a longitudinal foundation pillar framework and a transverse foundation pillar hoop frame both adopt reinforcing steel bars with the diameter of 700mm, wherein the longitudinal foundation pillar framework adopts phi 12mm thread reinforcing steel bars, the yield strength is 400MPa, the transverse foundation pillar hoop frame adopts phi 8mm thread reinforcing steel bars, and the yield strength is 335 MPa; the vertical skeleton of the top-contacting column and the transverse hoop frame of the top-contacting column both adopt reinforcing steel bars with the diameter of 700mm, wherein the vertical skeleton of the top-contacting column adopts phi 12mm thread reinforcing steel bars, the yield strength is 400MPa, the transverse hoop frame of the top-contacting column adopts phi 8mm thread reinforcing steel bars, and the yield strength is 335 MPa.
In the prefabricated framework pillar for the underground coal mine, the cavity longitudinal framework, the cavity transverse hoop frame and the cavity fixing ribs are all made of steel bars with the diameter of 700mm, wherein the cavity longitudinal framework is made of phi 12mm threaded steel bars, the yield strength is 400MPa, the cavity transverse hoop frame and the cavity fixing ribs are made of phi 8mm threaded steel bars, and the yield strength is 335 MPa.
In the prefabricated framework pillar for the underground coal mine, the height ratio of the top connection pillar to the whole foundation pillar is 1: 3-1: 8.
Compared with the prior art, the invention has the following technical advantages:
(1) the foundation column and even the top-connected column are prefabricated on the ground, and when the underground foundation column is used underground, the foundation column is transported to the underground from the ground, can play a role after being installed, and can provide timely support, so that the underground temporary support is reduced, and the support strength is ensured.
(2) The foundation column is prefabricated on the ground, and the roof connecting column is cast in situ underground, so that the foundation column can meet the high requirement that the gob-side entry retaining roof has large deformation and needs to be supported in situ.
(3) The cavity is formed in the foundation column, so that the difficulty in transporting the prefabricated foundation column from the ground to the underground can be reduced, the supporting speed can be ensured, the transportation strength and the cost are reduced, and meanwhile, the slurry is saved under the condition of meeting the supporting strength.
(4) The foundation column and the roof connecting column provide supports with enough strength, and the foundation column and even the roof connecting column can be disassembled and recycled for repeated utilization when the gob-side entry retaining is destroyed under the condition of small roadway deformation, so that the support cost is reduced.
Drawings
In order that the summary of the invention may be more readily understood, the invention will now be further described with reference to the accompanying drawings and examples.
FIG. 1 is a schematic structural view (without slurry filling) of a prefabricated framework pillar base column for underground coal mine of the invention;
FIG. 2 is a partial front view (without slurry filling) of a prefabricated framework pillar base for use in a coal mine well according to the present invention;
FIG. 3 is a top view of a portion of a prefabricated framework pillar base for use in a coal mine well (not filled with slurry) in accordance with the present invention;
FIG. 4 is a partial front view of a prefabricated framework pillar base for use in a coal mine well according to the present invention (filled with slurry);
FIG. 5 is a schematic structural view of a prefabricated framework pillar topping column for underground coal mine (without slurry filling);
FIG. 6 is a front view of a prefabricated framework pillar topping column (filled with slurry) for underground coal mine of the present invention;
FIG. 7 is a schematic diagram of a prefabricated framework pillar anchor cable hoop for underground coal mine.
Labeled as: 1-foundation column, 2-top-connected column, 3-anchor cable hoop, 101-foundation column longitudinal framework, 102-foundation column transverse hoop frame, 103-cavity, 104-cavity longitudinal framework, 105-cavity transverse hoop frame, 106-cavity fixing rib, 107-foundation column corrugated pipe, 108-foundation column slurry, 201-top-connected column longitudinal framework, 202-top-connected column transverse hoop frame, 203-top-connected column corrugated pipe and 204-top-connected column slurry.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 to 7 show preferred embodiments of the prefabricated framework pillar for underground coal mine according to the present invention.
Example one
The prefabricated framework pillar for the underground coal mine comprises a foundation pillar 1 and a top-contacting pillar 2; the foundation column 1 comprises a foundation column longitudinal framework 101, a foundation column transverse hoop frame 102, a cavity longitudinal framework 104, a cavity transverse hoop frame 105, a cavity fixing rib 106, a foundation column corrugated pipe 107 and foundation column slurry, and the top-connected column 2 comprises a top-connected column longitudinal framework 201, a top-connected column transverse hoop frame 202, a top-connected column corrugated pipe 203 and top-connected column slurry 204; the foundation column longitudinal framework 101, the foundation column transverse hoop frame 102, the cavity longitudinal framework 104, the cavity transverse hoop frame 105 and the cavity fixing ribs 106 form a foundation column hoop, the foundation column corrugated pipe 107 is sleeved on the periphery of the foundation column hoop, and the foundation column slurry 108 is filled in the foundation column corrugated pipe 107 and forms a cavity 103; the top column longitudinal framework 201 and the top column transverse hoop 202 form a top column reinforcement hoop, the top column corrugated pipe 203 is sleeved on the periphery of the top column reinforcement hoop, and the top column slurry 204 is filled in the foundation column corrugated pipe 203; the foundation column 1 is prefabricated on the ground, when the foundation column is used, the prefabricated foundation column 1 is transported to the underground from the ground, the foundation column 1 is fixed at a preset supporting position of an underground gob-side entry retaining, and the top of the foundation column 1 is cast on site to form a top receiving column 2.
In this embodiment, the base 1 is a single body.
Example two
The present embodiment is different from the first embodiment in that: in this embodiment, the pillar 1 is solid after filling with slurry, and no cavity exists.
EXAMPLE III
The present embodiment is different from the first embodiment in that: in this embodiment, the landing post 2 is also prefabricated on the ground.
Example four
The present embodiment is different from the first embodiment in that: in this embodiment, the landing post 2 also forms a cavity.
EXAMPLE five
The present embodiment is different from the first embodiment in that: in this embodiment, an anchor cable hoop 3 is further fixed on the periphery of the top-column corrugated pipe 203.
EXAMPLE six
The present embodiment is different from the first embodiment in that: in this embodiment, an anchor cable hoop 3 is further fixed to the periphery of the base column corrugated pipe 107.
EXAMPLE seven
The present embodiment is different from the first embodiment in that: in this embodiment, foundation column 1 is the assembly of 2 short prefabricated skeleton cylinders, short prefabricated skeleton main part is prefabricated respectively on ground, assembles into a whole in the pit.
In the above embodiment, the top-connected pillar and the integral foundation pillar comprise foundation pillars formed by combining a plurality of short prefabricated framework pillars, and the height ratio is 1: 3-1: 8.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (7)
1. The utility model provides a colliery is prefabricated skeleton pillar of usefulness in pit which characterized in that: comprises a foundation column (1) and a top-contacting column (2);
the foundation column (1) comprises a foundation column longitudinal framework (101), a foundation column transverse hoop frame (102), a cavity longitudinal framework (104), a cavity transverse hoop frame (105), cavity fixing ribs (106), a foundation column corrugated pipe (107) and foundation column slurry, and the top-receiving column (2) comprises a top-receiving column longitudinal framework (201), a top-receiving column transverse hoop frame (202), a top-receiving column corrugated pipe (203) and top-receiving column slurry (204);
the foundation column longitudinal framework (101), the foundation column transverse hoop frame (102), the cavity longitudinal framework (104), the cavity transverse hoop frame (105) and the cavity fixing ribs (106) form a foundation column hoop, the foundation column corrugated pipe (107) is sleeved on the periphery of the foundation column hoop, and the foundation column slurry (108) is filled in the foundation column corrugated pipe (107) to form a cavity (103);
the top column longitudinal framework (201) and the top column transverse hoop frame (202) form a top column hoop, the top column corrugated pipe (203) is sleeved on the periphery of the top column hoop, and the top column slurry (204) is filled in the foundation column corrugated pipe (203);
the foundation column (1) is prefabricated on the ground, when in use, the prefabricated foundation column (1) is transported from the ground to the underground, the foundation column (1) is fixed at a preset supporting position of an underground gob-side entry retaining, and the top of the foundation column (1) is cast on site to form a top receiving column (2).
2. The coal mine underground prefabricated framework pillar according to claim 1, characterized in that: the foundation column (1) is an assembly of more than one shorter prefabricated framework column bodies.
3. The coal mine underground prefabricated framework pillar according to claim 1 or 2, characterized in that: the foundation column (1) is solid after being filled with slurry, i.e. no cavity exists.
4. The coal mine underground prefabricated framework pillar according to any one of claims 1 to 3, which is characterized in that: the roof connecting column (2) is prefabricated on the ground.
5. The coal mine underground prefabricated framework pillar according to any one of claims 1 to 4, which is characterized in that: the roof connecting column (2) also forms a cavity.
6. The prefabricated skeleton pillar for the underground coal mine according to any one of claims 1 to 5, wherein: and an anchor cable hoop (3) is further fixed on the periphery of the top-contacting column corrugated pipe (203).
7. The prefabricated skeleton pillar for the underground coal mine according to any one of claims 1 to 6, wherein: and an anchor cable hoop (3) is further fixed on the periphery of the foundation column corrugated pipe (107).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956025.1A CN110939473A (en) | 2019-10-09 | 2019-10-09 | Prefabricated framework pillar for underground coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956025.1A CN110939473A (en) | 2019-10-09 | 2019-10-09 | Prefabricated framework pillar for underground coal mine |
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| Publication Number | Publication Date |
|---|---|
| CN110939473A true CN110939473A (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910956025.1A Pending CN110939473A (en) | 2019-10-09 | 2019-10-09 | Prefabricated framework pillar for underground coal mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109458A (en) * | 2021-11-29 | 2022-03-01 | 长沙矿山研究院有限责任公司 | Reinforced concrete artificial ore pillar construction method |
-
2019
- 2019-10-09 CN CN201910956025.1A patent/CN110939473A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109458A (en) * | 2021-11-29 | 2022-03-01 | 长沙矿山研究院有限责任公司 | Reinforced concrete artificial ore pillar construction method |
| CN114109458B (en) * | 2021-11-29 | 2022-07-26 | 长沙矿山研究院有限责任公司 | Reinforced concrete artificial ore pillar construction method |
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