CN208605160U - A kind of coal mine gas extraction drill hole pressure wind sealing device - Google Patents
A kind of coal mine gas extraction drill hole pressure wind sealing device Download PDFInfo
- Publication number
- CN208605160U CN208605160U CN201820772563.6U CN201820772563U CN208605160U CN 208605160 U CN208605160 U CN 208605160U CN 201820772563 U CN201820772563 U CN 201820772563U CN 208605160 U CN208605160 U CN 208605160U
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- Prior art keywords
- tube
- expansion
- expansion tube
- branch
- extraction
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- Expired - Fee Related
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The purpose of the utility model is to provide a kind of coal mine gas extraction drill holes to press wind sealing device, including the drainage tube being set in extraction borehole, one section of note air hose is equipped in drainage tube, drainage tube periphery is equipped at intervals with the first expansion tube and the second expansion tube that can be filled, note air hose corresponds respectively to the first expansion tube and the part of the second expansion tube is respectively provided with the first branch being pierced by from extraction tube wall, the first branch is connected to the first expansion tube, the second expansion tube, and first branch end is equipped with check valve；It infuses extraction tube portion of the air hose between the first expansion tube and the second expansion tube and is equipped with a second branch being pierced by from extraction tube wall, second branch end is provided with level pressure explosive valve.The extraction borehole sealing device is easy to use and operate, while being influenced by underground work environment small, can keep excellent sealing performance for a long time.
Description
Technical field
The utility model relates to control of coalmine gas devices, relate in particular to a kind of coal mine gas extraction drill hole sealing dress
It sets.
Background technique
Gas drainage is the essential measure and main path of control of coalmine gas, and extraction borehole sealing has extracting result
Very big influence, gas leak phenomenon is serious during being mainly shown as hole pumping and mining, and gas extraction concentration is low.This is directly resulted in very
Utilizable concentration conditions are not achieved in the gas of more coal extractions, and gas utilization rate is low, a large amount of gas discharging directly into atmosphere, not only
The huge waste of resource is caused, pollution also is caused to environment.
Most common method for sealing is that the interior extraction seal section two that drills is blocked by special-purpose assorted device or polyurethane
Then cement slurry is injected in centre to realize sealing of hole (being commonly called as a two stifled notes) in side.This method is due to by underground work environment, behaviour
Making the factors such as peopleware and slurry material proportion stirring influences, and technics comparing is cumbersome, is extremely difficult to satisfied sealing effect
Fruit.Sealed material after hardening consolidation will form new leakage path with the influence of mining dynamical pressure, further decrease sealing
Effect, gas leakage is serious under extraction suction function.
Summary of the invention
The purpose of the utility model is to provide a kind of device of coal mine gas extraction drill hole sealing, extraction borehole sealing dresses
It sets easy to use and operate, while being influenced by underground work environment small, excellent sealing performance can be kept for a long time.
To achieve the above object, a kind of coal mine gas extraction drill hole of the utility model presses wind sealing device, including is set to and takes out
Drainage tube in borehole is equipped with one section of note air hose in drainage tube, and the drainage tube periphery is equipped at intervals with can fill first
Expansion tube and the second expansion tube, note air hose corresponds respectively to the first expansion tube and the part of the second expansion tube is respectively provided with from drainage tube
The first branch that tube wall is pierced by, the first branch are connected to the first expansion tube, the second expansion tube, and first branch end is equipped with unidirectional
Valve；Infuse extraction tube portion of the air hose between the first expansion tube and the second expansion tube is equipped with that one article is pierced by from extraction tube wall the
Two branches, second branch end are provided with level pressure explosive valve.
The first branch is connect through threeway with pressure ventilation pipe.
First expansion tube, the second expansion tube bearing structure main body are made of nylon braiding layer, and inner wall is provided with antiseepage
Coating, outer wall are provided with modified pitch coating.
The barrier coat is rubber layer or PVC coating.
The nylon braiding layer is the blended material of polyamide fibre, terylene, aramid fiber and polyamide fibre, terylene, aramid fiber.
The sealing device of the utility model fills expansion tube using pressure wind, realizes to the closed of borehole sealing section two sides, section
Cost-saving and facilitate operation, penetrates into the colloidal sol in drilling wall surface coal body hole, coal body hole crack can be effectively filled, to coal
The adhesive bond that body is formed has certain elastic and very low infiltration coefficient, solves existing solid sealing material in extraction one
The defect for causing sealing effect to be deteriorated due to drilling deformation after the section time, can keep excellent sealing performance for a long time.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1- gas drainage pipe, 2- air injection pipe, the first expansion tube of 3-, the second expansion tube of 4-, the 5- first branch, 6-
One branch, 8- level pressure explosive valve, 9- check valve, 10- hole colloidal sol adhesive bond.
Specific embodiment
The utility model will be further described below with reference to the accompanying drawings.
A kind of coal mine drainage borehole described in the utility model presses wind sealing device, including the drainage tube being set in extraction borehole
1, one section of air injection pipe 2 connecting with underground pressure air hose is equipped in drainage tube 1,1 periphery of drainage tube is equipped at intervals with and can fill
The first expansion tube 3 and the second expansion tube 4, air injection pipe 2 respectively corresponds the first expansion tube 3 and the part of the second expansion tube 4 is respectively set
There is the first branch 6 being pierced by from extraction tube wall.Infuse extraction of the air hose between the first expansion tube 3 and the second expansion tube 4
Tube portion is equipped with the second branch 5 being pierced by from tube wall.The first branch 6 in two expansion tubes connects air injection pipe 2 through threeway；First
Two end outlets of branch are respectively provided with a check valve 9, and filling in expansion tube in seal process has compressed air with pressure, real
Now to effective closure of drilling.Second branch 5 between two expansion tubes connects air injection pipe 2 through threeway, and end outlet is equipped with
Level pressure explosive valve 8 after level pressure explosive valve 8 is opened, forms glue to borehole space pressure injection hole colloidal sol during borehole sealing
Knot body 10, since borehole sealing section two sides have been inflated the seal of tube, hole colloidal sol can under pressure, along the axial infiltration of drilling
While saturating, certain range is infiltrated into drilling radial direction, over time, penetration range is gradually increased and hole colloidal sol
Viscosity gradually increase, until be finally stopped perfusion, can be formed with coal body after the perfusion of hole colloidal sol have preferably impermeability with it is anti-
The spawn of pressure property, the spawn effectively improve the sealing performance of drilling and sealing section.Since hole dissolves glue
There is knot body certain elasticity can deform, be remained to drill hole inner wall with the denaturation of drilling after extraction for a period of time
Effective closure in crack.First expansion tube 3 and 4 bearing structure main body of the second expansion tube are made of nylon braiding layer, and inner wall is by rubber
Glue or PVC coating antiseepage, outer wall are equipped with the modified pitch coating compression processing larger crack of hole wall, and gas pressure increases in expansion tube
While adding, the modified pitch of expansion pipe outer wall coating can be effectively penetrated under pressure in the larger crack of hole wall, further
The permeability of seal section two sides hole wall coal body is reduced, is laid the foundation for hole colloidal sol along the radial effective infiltration of drilling.
It is by underground pressure air piping connection present apparatus air injection pipe 2, Xiang Benshi using the method for aforementioned device sealing drilling
It is persistently pressurizeed with new device；Expansion tube in utility model device fills under compressed air effect to be expanded and squeezes brill
Hole inner wall makes to form closed cavity between two expansion tubes；It expands the outer modified pitch of tube wall and penetrates into the larger crack of hole wall, realize swollen
Tube expansion position tentatively blocks；Continue to pressurize, reaches the burst pressure of 5 terminal level pressure explosive valve 8 of second branch；System pressure is more than
Explosive valve burst pressure opens explosive valve 8, starts to inject hole colloidal sol to the closed cavity between two expansion tubes；Hole is molten
Glue perfusion stops until filling confined space；It should be noted that the utility model pressure is long according to two sides expansion tube material, leak stopping
Degree, the different of bore diameter are adaptively adjusted.
It is noted that, for those skilled in the art, before not departing from the utility model principle
Put, can also make it is several be similarly modified, these improvement also should be regarded as the protection scope of the utility model.
Claims (4)
1. a kind of coal mine gas extraction drill hole presses wind sealing device, it is characterised in that: including the drainage tube being set in extraction borehole,
One section of note air hose is equipped in drainage tube, the drainage tube periphery is equipped at intervals with the first expansion tube that can be filled and the second expansion
Pipe, note air hose corresponds respectively to the first expansion tube and the part of the second expansion tube is respectively provided with first be pierced by from extraction tube wall
Road, the first branch are connected to the first expansion tube, the second expansion tube, and first branch end is equipped with check valve；It is swollen first to infuse air hose
Extraction tube portion between tube expansion and the second expansion tube is equipped with a second branch being pierced by from extraction tube wall, second branch end
End is provided with level pressure explosive valve.
2. coal mine gas extraction drill hole according to claim 1 presses wind sealing device, it is characterised in that: the first branch
It is connect through threeway with pressure ventilation pipe.
3. coal mine gas extraction drill hole according to claim 1 presses wind sealing device, it is characterised in that: first expansion
Pipe, the second expansion tube bearing structure main body are made of nylon braiding layer, and inner wall is provided with barrier coat, and outer wall is provided with modified drip
Green coating.
4. coal mine gas extraction drill hole according to claim 3 presses wind sealing device, it is characterised in that the barrier coat
For rubber layer or PVC coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820772563.6U CN208605160U (en) | 2018-05-23 | 2018-05-23 | A kind of coal mine gas extraction drill hole pressure wind sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820772563.6U CN208605160U (en) | 2018-05-23 | 2018-05-23 | A kind of coal mine gas extraction drill hole pressure wind sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208605160U true CN208605160U (en) | 2019-03-15 |
Family
ID=65661679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820772563.6U Expired - Fee Related CN208605160U (en) | 2018-05-23 | 2018-05-23 | A kind of coal mine gas extraction drill hole pressure wind sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208605160U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468529A (en) * | 2018-05-23 | 2018-08-31 | 山西潞安环保能源开发股份有限公司常村煤矿 | A kind of coal mine gas extraction drill hole pressure wind sealing method and device |
-
2018
- 2018-05-23 CN CN201820772563.6U patent/CN208605160U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468529A (en) * | 2018-05-23 | 2018-08-31 | 山西潞安环保能源开发股份有限公司常村煤矿 | A kind of coal mine gas extraction drill hole pressure wind sealing method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190315 |