CN106121685B - A kind of jack up concrete filled steel tube support system for gob side entry retaining - Google Patents
A kind of jack up concrete filled steel tube support system for gob side entry retaining Download PDFInfo
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- CN106121685B CN106121685B CN201610724421.8A CN201610724421A CN106121685B CN 106121685 B CN106121685 B CN 106121685B CN 201610724421 A CN201610724421 A CN 201610724421A CN 106121685 B CN106121685 B CN 106121685B
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- steel pipe
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- jack
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 108
- 239000010959 steel Substances 0.000 title claims abstract description 108
- 239000004567 concrete Substances 0.000 title claims abstract description 85
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000007596 consolidation process Methods 0.000 claims abstract description 10
- 230000000740 bleeding effect Effects 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000008093 supporting effect Effects 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 238000009414 blockwork Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 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
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/183—Supporting means for arch members, not provided for in E21D11/22
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
This patent discloses a kind of jack up concrete filled steel tube support systems for gob side entry retaining, belong to roadway support field.This patent jack up concrete filled steel tube support system is mainly made of steel pipe, external steel pipe circular bar outside pedestal, internal steel pipe, check valve, concrete grouting pump, sealing ring, air bleeding valve, " ∏ " shape etc..Steel pipe gradually rises after concrete is full of pipeline hollow cavity outside " ∏ " shape in the system, and under the pressure effect of filling pump, the horizontal component of steel pipe plays active supporting role to top plate outside ∏ " shapes；After concrete consolidation, the part such as concrete of steel pipe, internal steel pipe and consolidation constitutes steel pipe concrete bracket outside " ∏ " shape.The jack up concrete filled steel tube support system of the present invention is easy for installation, and supporting intensity is high, and shield top, to cut top effect good, has great importance to gob side entry retaining.
Description
Technical field
The invention belongs to colliery tunnel support fields, and in particular to arrive a kind of jack up steel tube concrete for gob side entry retaining
Native support system.
Background technology
Currently, country widelys popularize no coal column mining technique, to reduce the generation of the disasters such as bump.Gob side entry retaining is
The haulage gate or air return way at mining face rear are remained with certain method along goaf, as subsequent work face
Crossheading.It is mainly had the advantage that using edge air gallery technology：Coal recovery rate is improved, mine service-life is extended；
A tunnel is dug less, reduces mine development end rate, and it is nervous to alleviate excavation replacement；Stress of coal pillar is concentrated to exploitation when eliminating coal column shield lane
Adverse effect；It realizes the ventilation of working face Y types, solves corner methane accumulation.These advantages make edge air gallery technology by certain
The favor of a little coal mining enterprises.China at present frequently with gob-side entry retaining method be packwall, close standing props, grillage, spoil bag, build
Block etc..
The tunnel safeguarded using gob side entry retaining will generally be undergone adopts high stress process twice, and roadway surrounding rock is caused to answer
Power is distributed to be shown acutely with mine pressure, and roadway surrounding rock worsening condition, fracture area and plastic zone range are big.An especially upper working face
After back production, in base object model into goaf rotation, sinking watching, not only strong sinking, but also real coal occur gob side entry retaining for top plate
The bulging of body side and pucking are serious, and roadway surrounding rock fracture area, plastic zone range is caused to significantly increase, and deformation of the surrounding rock in tunnel amount is big, dimension
Shield is very difficult.
When coal mine uses gob side entry retaining, when using modes such as packwalls, packwall passively carries, and does not have the work for cutting top
With the power of movement of roof is transmitted to bottom plate by packwall, causes pucking, and strong influence is caused to coal back production.
Invention content
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of jack up steel for gob side entry retaining
Pipe concrete support system, the system have the function of, from rising, to provide top plate larger support force, play the role of cutting top, separately
The outer high intensity with steel pipe concrete bracket, stays lane effect good, can solve the technical issues of current gob side entry retaining is encountered.
To solve the above problems, the present invention program includes：
A kind of jack up concrete filled steel tube support system for gob side entry retaining disclosed by the invention, including pedestal, inside
Steel pipe, check valve, sealing ring, concrete grouting pump, sealing ring snap ring, air bleeding valve, " ∏ " shape outside steel pipe, external steel pipe annular
Muscle.It is characterized in that：Steel pipe gradually rises after concrete is full of hollow cavity outside " ∏ " shape, the level of steel pipe outside " ∏ " shape
Is played to top plate by active supporting role for part；After concrete consolidation, the coagulation of steel pipe, internal steel pipe and consolidation outside " ∏ " shape
Soil constitutes steel pipe concrete bracket.
Above-mentioned external steel pipe can preferably protect top at " ∏ " shape.
Steel pipe gradually rises after concrete is full of pipeline hollow cavity outside above-mentioned " ∏ " shape, has and rises characteristic certainly,
Under the high pressure force effect of concrete filling pump, the horizontal component of steel pipe can apply 100kN-150kN to top plate outside " ∏ " shape
Active force, convenient for cut top so that stay lane better.
Diameter of steel tube is 190mm-210mm outside " ∏ " shape, and internal diameter of steel tube is 170mm-190mm, forms steel
After pipe concrete holder, steel pipe concrete bracket integral strength can reach 1400kN-1600kN.
There are one spring and sphere structures inside above-mentioned check valve, spring can be made to receive when noting concrete inside
Contracting, opens top dome, once original position will be restored under the action of the spring by stopping note coagulation soil ball so that injection that can only be unidirectional
Concrete and cannot allow internal concrete outflow.
Steel pipe carries crossbeam outside above-mentioned " ∏ " shape, and crossbeam span is 1000mm-1200mm.External steel pipe connects with crossbeam
It is right angle to meet place.
Comprising the waterproof breathable membrane that high density steel silk screen, intensity are high inside above-mentioned breather valve, can ensure in ventilation
In the case of do not allow slurries to outflow.
Above-mentioned circular bar is a diameter of 25mm, and spacing is the reinforcing bar of 200mm, and uniform welding is on external steel pipe, the ring
Shape reinforcing bar is mainly used to increase the intensity of steel pipe concrete bracket.
There is a rubber seal between above-mentioned inside and outside steel pipe, outer and inner tube can be bonded, steel pipe liter outside " ∏ " shape
When rising, slurries will not be made to flow out.
Above-mentioned pedestal is the round entity structure of diameter 280mm-320mm, thickness 30mm-32mm, can ensure steel pipe
Concrete support is pressurized and is unlikely to the phenomenon that piercing bottom plate occur.
The invention discloses a kind of jack up concrete filled steel tube support systems for gob side entry retaining, by internal steel pipe
Check valve inject concrete, after pipeline hollow cavity fills so that " ∏ " shape outside steel pipe gradually rise, " ∏ " shape outside steel pipe
Horizontal gird active supporting role is played to top plate；After concrete consolidation, steel pipe, internal steel pipe and consolidation outside " ∏ " shape
Concrete constitute steel pipe concrete bracket.
The present invention jack up concrete filled steel tube support system assembled by several independent individuals, can realize by
Pressure rises certainly, easy to operate, at low cost, more securely and reliably, and can realize multiple concrete filled steel tube support systems while rise
It rises, greatly improves work efficiency, be suitable for promoting the use of in coal mine gob-side entry retaining.
Description of the drawings
Further clear, complete explanation is done to the present invention below in conjunction with the accompanying drawings：
Fig. 1：Coal working face uses jack up concrete filled steel tube support system gob side entry retaining side view
Fig. 2:Coal working face uses jack up concrete filled steel tube support system gob side entry retaining vertical view
Fig. 3:Jack up concrete filled steel tube support system
Fig. 4:Check valve structure schematic diagram
Fig. 5：Breather valve organigram
Wherein：1, base object model, 2, directly push up, 3, entity coal, 4, goaf, 5, building block, 6, steel pipe concrete bracket, 7, suitable
Slot, 8, advance of the face direction, 9, concrete grouting pump, 10, check valve, 11, air bleeding valve, 12, steel pipe outside " ∏ " shape, 13,
External steel pipe circular bar, 14, sealing ring, 15, internal steel pipe, 16, pedestal, 17, sealing ring snap ring, 18, filling concrete switch,
19, check valve is into concrete mouth, 20, check valve go out concrete mouth, 21, waterproof breathable membrane, 22, high density wire netting.
Specific embodiment
The invention discloses a kind of jack up concrete filled steel tube support systems for gob side entry retaining, in order to make the present invention's
Advantage, technical solution are clearer, clear, and further clear, complete explanation is done to the present invention with reference to specific embodiment.
The present invention use jack up concrete filled steel tube support system gob side entry retaining schematic diagram as shown in Figure 1, building block 5 and its
The steel fiber reinforced concrete sprayed above plays the pernicious gases such as gas in sealing goaf 4 and enters crossheading 7, and concrete filled steel tube branch
Frame 6 then has higher setting load and high intensity to top plate, plays the role of cutting directly top 2 and base object model 1 and stays lane.
The concrete filled steel tube support system of the present invention is as shown in Figure 3.Pedestal 16 keeps the steady of concrete filled steel tube support system
Determine and avoid boring the generation at bottom, the position of sealing ring 14 to be fixed under sealing ring snap ring 17, when on the steel pipe 12 of " ∏ " shape outside
Sealing ring 14 remains stationary as when liter.Check valve is convenient to connection grouting pump 9 into concrete mouth 17 towards outside, air bleeding valve 11
It is positioned against outside.Concrete is sent into pipeline hollow cavity by filling pump 9 by filling concrete switch 18, in the process of perfusion
In, the air in pipeline hollow cavity is discharged by air bleeding valve 11.After pipeline hollow cavity fills, steel pipe 12 is filling outside " ∏ " shape
It is gradually risen under the pressure effect of pump 9, and roof supporting.
The one-way valve structures of the present invention are as shown in Figure 4.There are one spring and sphere structures inside the check valve, note inside
It can make spring contraction when concrete, top dome is opened, once stopping note coagulation soil ball will restore under the action of the spring
To original position, concrete is entered by check valve into concrete mouth 19, and going out concrete mouth 20 by check valve enters pipeline hollow cavity.
The exhaust structure of the present invention is as shown in Figure 5.Breather valve inside, which includes high density steel silk screen 22, intensity is high prevents
Water breathable films 21, the exhaust structure can ensure not allow slurries to outflow in the case of ventilation.
The gob side entry retaining construction method of the present invention, mainly comprises the following steps：
Step 1：It is gradually promoted along coal working face direction of propulsion 8, after working face entity coal 3 produces, forms and adopt
Dead zone 4.
Step 2：In crossheading 7 block 5, the width of building block 5 are assembled close to the position of 4 side 1000mm-1200mm of goaf
400mm-500mm, highly until touching directly top 2.After building block 5 finishes building, it is mixed that steel fibre is sprayed on the wall being built into
Solidifying soil spray-up, jetting thickness 100mm-150mm separate the pernicious gases such as the gas in goaf 4 and enter crossheading 7, and blockwork exists
Roof supporting can also be played the role of to a certain extent.
Step 3：After blockwork is completed, a frame self-lifting concrete filled steel tube support system is put on the inside of blockwork
The spacing of (close to crossheading side), two frame concrete filled steel tube support systems is 800mm-1000mm.
Step 4：After installing jack up concrete filled steel tube support system, filling concrete switch 18, concrete are opened
Concrete mouth 20 will be gone out from check valve and enter pipeline hollow cavity, after pipeline hollow cavity fills, steel pipe 12 will be outside " ∏ " shape
Rise under the action of pressure slowly, and internal extra gas can be by carrying waterproof breathable membrane 21 and high density wire netting
22 air bleeding valve 11 and be discharged.When the crossbeam of steel pipe 12 reaches directly top 2 and has certain setting load outside " ∏ " shape
Turn off filling concrete switch 18, stops note concrete.Due to the effect of check valve 10, inner concrete is realized without outflow.
Step 5：After filling concrete is completed, the equipment such as concrete filling pump are removed, wait for concrete cavity in the duct
After middle consolidation, the concrete of steel pipe 12, internal steel pipe 15 and consolidation forms 6 supports of steel pipe concrete bracket outside " ∏ " shape
Plate, the lanes Qie Dingheliu.
Step 6：After waiting for that this cycle is completed, coal working face continues to promote, and carries out next cycle.
Claims (8)
1. a kind of jack up concrete filled steel tube support system for gob side entry retaining, including it is pedestal, internal steel pipe, check valve, close
Seal, concrete grouting pump, sealing ring snap ring, air bleeding valve, " ∏ " shape outside steel pipe, external steel pipe circular bar, it is characterised in that：
Steel pipe and internal steel pipe are hollow form outside " ∏ " shape, and " ∏ " shape outside steel pipe includes horizontal component and vertical portion
Point, the internal diameter of steel pipe is more than the outer diameter of the internal steel pipe, the vertical portion of " ∏ " shape outside steel pipe outside " ∏ " shape
Point lower end is sheathed on the internal steel pipe, and steel pipe, which is equipped with, outside " ∏ " shape is used for increasing the strong of steel pipe concrete bracket
The external steel pipe circular bar of degree, the concrete grouting pump are set by check valve and the internal fastener for connection, the air bleeding valve
It is placed in outside " ∏ " shape on steel pipe, the sealing ring is set to outside " ∏ " shape between steel pipe and internal steel pipe, by sealing ring card
Ring blocks.
2. the jack up concrete filled steel tube support system according to claim 1 for gob side entry retaining, it is characterised in that：Institute
It states concrete grouting pump and concrete is injected to steel pipe outside " ∏ " shape and internal steel pipe hollow cavity by check valve, after filling,
The rise that steel pipe will under the effect of the pressure slowly outside " ∏ " shape, the horizontal component of " ∏ " shape outside steel pipe is to top plate
Play active supporting role.
3. the jack up concrete filled steel tube support system according to claim 2 for gob side entry retaining, it is characterised in that：It is mixed
After solidifying soil consolidation, the concrete of steel pipe, the internal steel pipe and consolidation constitutes steel pipe concrete bracket outside " ∏ " shape.
4. the jack up concrete filled steel tube support system according to claim 2 for gob side entry retaining, it is characterised in that：Institute
It includes that check valve goes out concrete mouth, spring and sphere structure into concrete mouth, check valve to state check valve.
5. the jack up concrete filled steel tube support system according to claim 1 for gob side entry retaining, it is characterised in that：Institute
It includes waterproof breathable membrane, high density wire netting to state air bleeding valve.
6. the jack up concrete filled steel tube support system according to claim 2 for gob side entry retaining, it is characterised in that：Institute
The horizontal component for stating steel pipe outside " ∏ " shape is 100kN-150kN to the active force that top plate applies.
7. the jack up concrete filled steel tube support system according to claim 1 for gob side entry retaining, it is characterised in that：Institute
It is a diameter of 25mm to state steel pipe circular bar outside " ∏ " shape, and spacing is the reinforcing bar of 200mm, uniform welding steel pipe outside " ∏ " shape
On.
8. the jack up concrete filled steel tube support system according to claim 1 for gob side entry retaining, it is characterised in that：Institute
State the round entity structure that pedestal is diameter 280mm-320mm, thickness 30mm-32mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610724421.8A CN106121685B (en) | 2016-08-25 | 2016-08-25 | A kind of jack up concrete filled steel tube support system for gob side entry retaining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610724421.8A CN106121685B (en) | 2016-08-25 | 2016-08-25 | A kind of jack up concrete filled steel tube support system for gob side entry retaining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106121685A CN106121685A (en) | 2016-11-16 |
| CN106121685B true CN106121685B (en) | 2018-08-17 |
Family
ID=57275152
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610724421.8A Active CN106121685B (en) | 2016-08-25 | 2016-08-25 | A kind of jack up concrete filled steel tube support system for gob side entry retaining |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU102737A1 (en) * | 2021-04-06 | 2021-10-06 | Univ Shandong Science & Tech | Method of holding a roadway along the Goaf with a self-lifting concrete-filled tubular steel support system of the ∏-type |
-
2016
- 2016-08-25 CN CN201610724421.8A patent/CN106121685B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU102737A1 (en) * | 2021-04-06 | 2021-10-06 | Univ Shandong Science & Tech | Method of holding a roadway along the Goaf with a self-lifting concrete-filled tubular steel support system of the ∏-type |
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| Publication number | Publication date |
|---|---|
| CN106121685A (en) | 2016-11-16 |
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