CN109026085A - A kind of coal mining high tensile steel tube concrete pillar and its application method - Google Patents
A kind of coal mining high tensile steel tube concrete pillar and its application method Download PDFInfo
- Publication number
- CN109026085A CN109026085A CN201810827971.1A CN201810827971A CN109026085A CN 109026085 A CN109026085 A CN 109026085A CN 201810827971 A CN201810827971 A CN 201810827971A CN 109026085 A CN109026085 A CN 109026085A
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- China
- Prior art keywords
- steel pipe
- pipe column
- concrete
- valve
- coal mining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 133
- 239000010959 steel Substances 0.000 title claims abstract description 133
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 238000005065 mining Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 10
- 210000002445 nipple Anatomy 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 13
- 238000005266 casting Methods 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000000178 monomer Substances 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- -1 aluminate salt Chemical class 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- 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)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of coal mining high tensile steel tube concrete pillars and its application method, including top steel pipe column and lower part steel pipe column, the lower part steel pipe column is connected and is connected to top steel pipe column, injected hole is offered on the lower part steel pipe column side wall, and unidirectional grouting stop-valve is installed at injected hole, it is connected between the unidirectional grouting stop-valve and lower part steel pipe column by injected hole, the concrete injects lower part steel pipe column inner cavity through injected hole by unidirectional grouting stop-valve, constantly concrete is injected from unidirectional grouting stop-valve, concrete rises from lower part steel pipe column until concrete is full of top steel pipe column inner cavity.The present invention utilizes constraint of the steel pipe column to concrete, the stress condition for improving concrete improves the intensity of concrete, and then solves conventional monomer hydraulic prop low bearing capacity in the prior art, flexible the problem of fractureing after by larger pressure, is, it can be achieved that the high requirement for supporting pressure.
Description
Technical field
The present invention relates to coal mining fields, and in particular to a kind of coal mining high tensile steel tube concrete pillar and its
Application method.
Background technique
In recent years, with China's coal-mine adopt it is deep continue to increase, deep-well tunnel mine pressure manifestation gradually highlights, and cuts simultaneously
The new technologies such as top release gob side entry retaining also improve the requirement for bearing capacity of roadway support body, the currently used hydraulic branch of conventional monomer
Column is flexible after by larger pressure to fracture due to low bearing capacity, has been difficult to meet the requirement of high support pressure.
Summary of the invention
In order to solve the problems in the existing technology, the present invention provides a kind of coal mining high tensile steel tube coagulations
Native pillar and its application method, by injecting concrete into steel pipe column, constraint using steel pipe column to concrete is improved mixed
The stress condition for coagulating soil improves the intensity of concrete, and then solves conventional monomer hydraulic prop low bearing capacity in the prior art
The problem of, it can be achieved that high support pressure requirement.
In order to achieve the above objectives, the technical solution adopted by the present invention is that, a kind of coal mining high strength steel pipe concrete
Pillar, including top steel pipe column, lower part steel pipe column and unidirectional grouting stop-valve, top steel pipe column protrudes into the steel pipe column of lower part, under described
Injected hole is offered on portion's steel pipe column side wall, is connected between the unidirectional grouting stop-valve and lower part steel pipe column by injected hole.
The top steel pipe column is the 1/6~1/2 of top steel pipe column total length for the length of nested parts.
The lower end of the lower part steel pipe column is fixed with column shoes, and the upper end of the top steel pipe column is fixed with bolumn cap, under described
The cross section of portion's steel pipe column and top steel pipe column is circle.
The side wall of the top steel pipe column offers gas vent close to the position of bolumn cap.
The unidirectional grouting stop-valve includes nipple, one-way valve tube and quick casting head, described nipple one end and lower part steel
It is connected between tubing string by injected hole, the nipple other end is connected to one-way valve tube one end, the one-way valve tube other end and quickly note
First end connection is starched, the quick casting head other end is the grouting port for being pumped into concrete slurry.
It is the cavity for fill concrete in the lower part steel pipe column and top steel pipe column.
The top steel pipe column and lower part steel pipe column are all made of the seamless steel pipe with a thickness of 6~10mm, top steel pipe column
Outer diameter is 4~7mm smaller than the internal diameter of lower part steel pipe column.
The concrete is normal concrete addition swelling agent or is aluminate self-stressing cement and normal sands or stone
Aggregate configures, and internal stress is 0.5~8MPa under the confining pressure effect that steel pipe provides, and strength grade is C25~C60.
The present invention also provides a kind of coal mining application methods of high tensile steel tube concrete pillar, first by top
Steel pipe column insertion lower part steel pipe column forms a whole, and stands the position for needing to carry out supporting in tunnel as a prop structure
It sets, concrete is then injected by the grouting port of unidirectional grouting stop-valve, concrete injects lower part from injected hole by unidirectional grouting stop-valve
Steel pipe column stops slip casting when the gas vent of top steel pipe column has concrete slurry spilling by continuously injecting.
Compared with prior art, the present invention at least has the advantages that
The present invention injects concrete from the grouting port of unidirectional grouting stop-valve, and concrete is injected by unidirectional grouting stop-valve from injected hole
Lower part steel pipe column stops note by continuously injecting when the gas vent of top steel pipe column has concrete slurry spilling
Slurry indicates that concrete has filled lower part steel pipe column and top steel pipe column at this time.The present invention is poured up and down using slightly expanded concrete
The assembled casing that portion's steel pipe is constituted, using the pump injection pressure power of concrete, so that top steel pipe column comes into contact with back, it can
So that concrete filled steel tube pillar well adapts to the variation of head-room, can be carried in time when back deformation.Using
Slightly expanded concrete improves the prestressing force that steel pipe applies core concrete, improves concrete filled steel tube prop after final set
Holistic resistant behavior.Compared with conventional monomer hydraulic prop in the prior art, the present invention is concrete filled steel tube solid strut, this
Invention utilizes constraint of the steel pipe column to concrete, improves the stress condition of concrete, improves the intensity of concrete, and then solve
Certainly conventional monomer hydraulic prop low bearing capacity in the prior art, flexible the problem of fractureing after by larger pressure, is, it can be achieved that high branch
The requirement of bulging power；Moreover, middle and upper part pipe column lower end of the present invention is nested into the steel pipe column of lower part, and can be up and down, it can
The adaptive of strut height may be implemented so that top steel pipe column slowly contacts back using the pump injection pressure power of concrete
It should adjust, to adapt to different head-rooms.
Further, the total length ratio of the inner nesting portion length of top steel pipe column of the present invention and top steel pipe column is 1/6
~1/2, the bearing capacity of concrete pillar is improved, can be prevented because pillar is broken or collapses caused by Tunnel Pressure is excessive
The appearance for situation of collapsing, while also improving the safety of construction.
Further, steel pipe column side wall in top of the present invention offers gas vent, has when concrete fills steel pipe column mixed
Solidifying soil paste liquid is overflowed from gas vent, be can be used as the mark whether monitoring concrete fills full steel pipe column inner cavity, is convenient for constructing operation.
Further, the present invention uses the bearing capacity that steel pipe column can be improved with a thickness of the seamless steel pipe of 6~10mm, meets
Intensity requirement when concrete pillar load-bearing.
Further, the present invention can prevent the refluence of concrete, inject from grouting port by the way that unidirectional grouting stop-valve is arranged
Concrete enters steel pipe column inner cavity by the unidirectional grouting stop-valve sealed, forms concrete pillar.
Further, the present invention selects slightly expanded concrete or aluminate salt concrete, improves steel after concrete final set
The prestressing force that pipe applies core concrete improves concrete filled steel tube prop holistic resistant behavior.
Further, on the one hand the column shoes of lower part steel pipe column of the present invention bottom end seal, in addition it can disperse to mix
Solidifying soil pillar is distributed the pressure on ground, prevents the effect that carrying is lost because of the pillar that pillar falls into ground and may cause.
Detailed description of the invention
Fig. 1 is concrete filled steel tube schematic diagram；
Fig. 2 is unidirectional grouting stop-valve structural schematic diagram；
Wherein, 1, lower part steel pipe column；2, top steel pipe column；3, concrete；4, column shoes；5, unidirectional grouting stop-valve；6, bolumn cap；7,
Gas vent；8, nipple；9, one-way valve tube；10, quick filling adaptor；11, grouting port；12, injected hole.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description:
As shown in Figure 1, the present invention includes lower part steel pipe column 1, top steel pipe column 2, column shoes 4, bolumn cap 6 and unidirectional grouting stop-valve 5,
Lower part steel pipe column 1 and top steel pipe column 2 are all made of the seamless steel pipe with a thickness of 6~10mm, and the lower end of top steel pipe column 2 is nested into
Steel pipe column 1 middle and upper part steel pipe column 2 in lower part is nested in the length of 1 the inside of lower part steel pipe column and the total length ratio of top steel pipe column 2 is
1/6~1/2, and can be up and down；Sealing is on the one hand played in this way together with 4 sealing welding of column shoes in the lower end of lower part steel pipe column 1
Effect is distributed in addition it can disperse concrete pillar to the pressure on ground, prevents from may cause because pillar falls into ground
Pillar lose the effect of carrying, steel pipe column 2 upper end in top welds together with bolumn cap 6, and the upper end of top steel pipe column 2 is close to column
The position of cap 6 offers gas vent 7, and concrete slurry is had when concrete 3 fills steel pipe column and is overflowed from gas vent 7, can be made
The mark of full steel pipe column inner cavity whether is filled for monitoring concrete 3, the side wall of lower part steel pipe column 1 offers injected hole 12, is used for
It is docked with the output end of unidirectional grouting stop-valve 5, and then injects concrete 3.
As shown in Fig. 2, unidirectional grouting stop-valve 5 includes nipple 8, one-way valve tube 9 and quick casting head 10, nipple 8 and list
It is connected to valve pipe 9 and is bolted together, one-way valve tube 9 is connected and is bolted with quick casting head 10
Together, quick 10 right end of casting head offers grouting port 11；It is cut with scissors on the one side that one-way valve tube 9 is contacted with quick casting head 10
The baffle of grouting port 11 can be blocked by being connected to one, and when the slip casting into one-way valve tube 9 of grouting port 11, baffle is rushed to open, and works as slip casting
When mouth 11 stops slip casting, the reflux of slurry will drive baffle and block grouting port 11；The right end of the nipple 8 of unidirectional grouting stop-valve 5
Face injected hole 12 welds together with lower part steel pipe column 1, and entire slip casting process thus may be implemented: by concrete 3 from list
It is injected to the grouting port 11 of grouting stop-valve 5, concrete 3 successively passes through one-way valve tube 9 and nipple 8, under injecting via injected hole 12
Portion's steel pipe column 1 constantly injects concrete 3 from grouting port 11, until the gas vent 7 of top steel pipe column 2 has concrete slurry spilling
When, it indicates that concrete 3 has filled the inner cavity of lower part steel pipe column 1 and top steel pipe column 2, stops injecting coagulation toward grouting port 11 at this time
Soil 3, and under the action of unidirectional grouting stop-valve 5, it can guarantee that slurry is stablized, until concrete slurry solidifies.
In a certain embodiment of the invention, 1 overall diameter of lower part steel pipe column is 219mm, wall thickness 10mm, and length is
4m；The positive square column shoes 4 of bottom end incision welding are with a thickness of 20mm, side length 400mm；1 side of the steel pipe column cutting one in lower part
A diameter is the circular hole of 100mm, welds a unidirectional grouting stop-valve 5, and unidirectional grouting stop-valve 5 is by nipple 8, one-way valve tube 9 and quick
Filling adaptor 10 forms, as shown in Figure 2.8 caliber of nipple is 130mm, and wall thickness 10mm, the permission slurries of one-way valve tube 9 are by infusing
It starches mouth 11 to inject, and prevents the reflux of concrete slurry.Quick filling adaptor 10 can realize unidirectional grouting stop-valve and grouting pump
Quickly connection and disassembly, unidirectional 5 distance of the minimum weld away from column shoes 4 of grouting stop-valve are 300mm.
Steel pipe column 2 overall diameter in top is 194mm, wall thickness 10mm, length 3m；The square column of top incision welding
Cap 6 is with a thickness of 20mm, side length 400mm；4 gas vents 7 are being opened away from top, are circumferentially being evenly arranged, aperture 5mm, Kong Zhong
Distance of the heart apart from bolumn cap 6 is 15mm, and the concrete 3 filled in top steel pipe column 2 and lower part steel pipe column 1 is normal silicate water
Mud mixes appropriate swelling agent, configures by a certain percentage with normal sands, stone, strength grade of concrete C30.
The above is only presently preferred embodiments of the present invention, not any limitation of the invention, for the skill of this field
For art personnel, can technical solution and design as described above, modify to the present invention and equivalent structure replacement, and
The objective and range for not departing from inventive technique scheme, are intended to be within the scope of the claims of the invention.
Claims (9)
1. a kind of coal mining high tensile steel tube concrete pillar, it is characterised in that: including top steel pipe column (2), lower part steel
Tubing string (1) and unidirectional grouting stop-valve (5), top steel pipe column (2) protrude into lower part steel pipe column (1), lower part steel pipe column (1) side wall
On offer injected hole (12), be connected between the unidirectional grouting stop-valve (5) and lower part steel pipe column (1) by injected hole (12).
2. a kind of coal mining high tensile steel tube concrete pillar according to claim 1, it is characterised in that: on described
Portion's steel pipe column (2) is the 1/6~1/2 of top steel pipe column (2) total length for the length of nested parts.
3. a kind of coal mining high tensile steel tube concrete pillar according to claim 1, it is characterised in that: under described
The lower end of portion's steel pipe column (1) is fixed with column shoes (4), and the upper end of the top steel pipe column (2) is fixed with bolumn cap (6), the lower part
The cross section of steel pipe column (1) and top steel pipe column (2) is circle.
4. a kind of coal mining high tensile steel tube concrete pillar according to claim 3, it is characterised in that: on described
The side wall of portion's steel pipe column (2) offers gas vent (7) close to the position of bolumn cap (6).
5. a kind of coal mining high tensile steel tube concrete pillar according to claim 1, it is characterised in that: the list
It include nipple (8), one-way valve tube (9) and quick casting head (10) to grouting stop-valve (5), described nipple (8) one end and lower part
It is connected between steel pipe column (1) by injected hole (12), nipple (8) other end is connected to one-way valve tube (9) one end, one-way valve tube
(9) other end is connected to quick casting head (10) one end, and quick casting head (10) other end is for being pumped into concrete slurry
Grouting port (11).
6. a kind of coal mining high tensile steel tube concrete pillar according to claim 1, it is characterised in that: under described
It is the cavity for fill concrete (3) in portion's steel pipe column (1) and top steel pipe column (2).
7. a kind of coal mining high tensile steel tube concrete pillar according to claim 1, it is characterised in that: on described
Portion's steel pipe column (2) and lower part steel pipe column (1) are all made of the seamless steel pipe with a thickness of 6~10mm, the outer diameter ratio of top steel pipe column (2)
Small 4~the 7mm of internal diameter of lower part steel pipe column (1).
8. a kind of coal mining high tensile steel tube concrete pillar according to claim 1, it is characterised in that: described mixed
Solidifying soil (3) be normal concrete addition swelling agent or be aluminate self-stressing cement and normal sands or stone aggregate configures and
At internal stress is 0.5~8MPa under the confining pressure effect that steel pipe provides, and strength grade is C25~C60.
9. a kind of user of coal mining according to claim 1-8 high tensile steel tube concrete pillar
Method, it is characterised in that: top steel pipe column (2) insertion lower part steel pipe column (1) forms a whole first, as a prop
Structure stands the position for needing to carry out supporting in tunnel, then injects concrete by the grouting port (11) of unidirectional grouting stop-valve (5),
Concrete injects lower part steel pipe column (2) from injected hole (12) by unidirectional grouting stop-valve (5), by continuously injecting, until
The gas vent (7) of top steel pipe column (2) stops slip casting when having concrete slurry spilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827971.1A CN109026085A (en) | 2018-07-25 | 2018-07-25 | A kind of coal mining high tensile steel tube concrete pillar and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827971.1A CN109026085A (en) | 2018-07-25 | 2018-07-25 | A kind of coal mining high tensile steel tube concrete pillar and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026085A true CN109026085A (en) | 2018-12-18 |
Family
ID=64645154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810827971.1A Pending CN109026085A (en) | 2018-07-25 | 2018-07-25 | A kind of coal mining high tensile steel tube concrete pillar and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026085A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404572A (en) * | 2018-12-30 | 2019-03-01 | 中铁十四局集团有限公司 | Non-return valve and pipeline with it |
| CN109469750A (en) * | 2018-12-30 | 2019-03-15 | 中铁十四局集团有限公司 | Non-return valve and pipeline with it |
| CN110966026A (en) * | 2019-11-29 | 2020-04-07 | 山东科技大学 | High-water-filling support roadside supporting method |
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| CN202578720U (en) * | 2012-03-16 | 2012-12-05 | 惠兴田 | Mining anchor post |
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| CN208885315U (en) * | 2018-07-25 | 2019-05-21 | 陕西煤业化工技术研究院有限责任公司 | High tensile steel tube concrete pillar for coal mining |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404572A (en) * | 2018-12-30 | 2019-03-01 | 中铁十四局集团有限公司 | Non-return valve and pipeline with it |
| CN109469750A (en) * | 2018-12-30 | 2019-03-15 | 中铁十四局集团有限公司 | Non-return valve and pipeline with it |
| CN109469750B (en) * | 2018-12-30 | 2024-09-13 | 中铁十四局集团有限公司 | Check valve and pipeline with same |
| CN109404572B (en) * | 2018-12-30 | 2024-09-13 | 中铁十四局集团有限公司 | Check valve and pipeline with same |
| CN110966026A (en) * | 2019-11-29 | 2020-04-07 | 山东科技大学 | High-water-filling support roadside supporting method |
| WO2021103191A1 (en) * | 2019-11-29 | 2021-06-03 | 山东科技大学 | Roadside support method by using high-water filled props |
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