CN110529065A - A kind of coal mine down-hole drilling sealing of hole structures and construction method - Google Patents
A kind of coal mine down-hole drilling sealing of hole structures and construction method Download PDFInfo
- Publication number
- CN110529065A CN110529065A CN201910914450.4A CN201910914450A CN110529065A CN 110529065 A CN110529065 A CN 110529065A CN 201910914450 A CN201910914450 A CN 201910914450A CN 110529065 A CN110529065 A CN 110529065A
- Authority
- CN
- China
- Prior art keywords
- hole
- sealing
- encapsulated holes
- drilling
- slip casting
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 79
- 238000005553 drilling Methods 0.000 title claims abstract description 38
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000007569 slipcasting Methods 0.000 claims abstract description 41
- 239000002002 slurry Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 239000003818 cinder Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- -1 poly- ammonia Ester Chemical class 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000010410 reperfusion Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/05—Cementing-heads, e.g. having provision for introducing cementing plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention discloses a kind of coal mine down-hole drilling sealing of hole structures and construction methods, the big encapsulated holes of aperture ratio hole sealing tube are drilled on coal wall, then hole sealing tube is fixedly mounted in encapsulated holes, and plug is installed in the slip casting space at hole sealing tube both ends, injection slurry is perfused between plug again, forms sealing of hole structures.The installation of this structures is reliable, and good airproof performance can effectively prevent gas leakage.The method for installing hole sealing tube is advanced to before drilling is fully completed simultaneously, it is carried out after the completion of encapsulated holes construction, it gushs problem in drilling construction after the completion of sealing of hole if there is gas, extraction can be carried out by the external extraction equipment of hole sealing tube by connecing, effective to control the problem of drilling gas is gushed.The problem of further more, installing hole sealing tube after encapsulated holes of having constructed, solving leads to encapsulate bore deformation since the too long stress between coal cinder of drilling is concentrated, and hole sealing tube dress is not into encapsulated holes, reduce the secondary construction of encapsulated holes and the probability as useless hole.
Description
Technical field
Field more particularly to a kind of coal mine down-hole drilling sealing of hole structures are administered the present invention relates to coal mine gas and are applied
Work method.
Background technique
During coal mine gas diaster prevention and control, coal-bed gas pressure is the important parameter of gas preventing and control, and to coal seam into
Row gas drainage is that prevention and treatment Gas Disaster is most effective, the most fundamental approach.Sealing of hole is gas pressure measurement and gas drainage engineering
Core methed, the height of sealing quality is the key that determine gas pressure measurement accuracy and gas pumping effect.Influence envelope
Hole quality it is many because being known as, mainly include sealing material, the depth of method for sealing and sealing of hole and length etc..Wherein sealing of hole side
Requirement of the method all to the method flow of control and the construction of the application of sealing material, hole sealing depth and length carries out stringent handle
Control, has played the height of sealing quality vital.
It is disposable to seal according to pre-determined encapsulation hole depth in current underground coal mine encapsulated holes sealing of hole work progress
It fills hole construction in place, hole sealing tube is then just installed and carries out sealing of hole.In being packaged hole work progress, due to gas in coal mine
There are certain pressure, will lead to gas and gush, and will cause the generation of gas accident if handling not in time.Simultaneously because coal
The problems in stress collection between block, in drilling construction, encapsulated holes are easy to that deviation occurs, and hole sealing tube is caused to be installed not up,
It is unable to reach expected encapsulated holes and sealing of hole effect, encapsulated holes need secondary construction or become useless hole.
Summary of the invention
The technical problem to be solved by the present invention is a kind of coal mine down-hole drilling sealing of hole structures and construction method are provided, with
Solution is unable to control that gas is gushed and encapsulated holes sealing of hole is ineffective in underground coal mine encapsulated holes sealing of hole in the prior art
Problem.
The technical scheme is that
A kind of coal mine down-hole drilling sealing of hole structures, it includes the encapsulated holes being drilled with for gas extraction, is equipped in encapsulated holes
Hole sealing tube forms slip casting space between the inner wall of encapsulated holes and the outer surface of hole sealing tube；The fixed peace in the slip casting space at both ends
Equipped with plug；Grouting Pipe and return pipe pass through plug and put in slip casting space；Slip casting is perfused with injection slurry in space.
The length of hole sealing tube is not less than 5m, and the closure length of plug is greater than 0.5m, is less than 1m.
Plug is polyurethane foam material.
Grouting Pipe and return pipe have one group or more, are evenly arranged in plug.
Hole sealing tube is welded with ring flange close to the end point of coal wall.
A kind of construction method of coal mine down-hole drilling sealing of hole structures, it the following steps are included:
Step 1, the reaming bit for being greater than sealing of hole pipe outside diameter using diameter carry out ream operation, after reaming construction to scheduled depth
Drilling machine stops drilling, in the residue backed off after random drill bit cleared up in encapsulated holes；
Hole sealing tube is packed into encapsulated holes by step 2；
Step 3 installs plug in the slip casting space at both ends, and slip casting space is reserved between plug；
Grouting Pipe and return pipe are passed through plug and extended in slip casting space by step 4；
Step 5 injects injection slurry in slip casting space, after the return pipe wait be located at top has slurries spilling, stops slip casting；
After the completion of step 6, slip casting, a period of time is stood, after injection slurry solidification, then re-starts drilling construction.
The diameter of reaming bit described in step 1 is 0.5 to 1 times bigger than the outer diameter of hole sealing tube.
For encapsulated holes horizontal and upward, the residue in encapsulated holes is cleaned up using hydraulic giant；And for court
Under encapsulated holes, cleared up in hole after residue, also needed moisture extraction extra in hole with water.
After the setting time of injection slurry is the twenty four hours after the completion of slip casting.
The invention has the advantages that:
A kind of coal mine down-hole drilling sealing of hole structures of the invention and construction method, hole sealing tube is installed in encapsulated holes, is being encapsulated
Plug is installed in the both ends gap between hole inner wall and sealing of hole tube outer surface, and is blocked by Grouting Pipe and return pipe at two pieces
Reperfusion serosity in slip casting space between object effectively blocks encapsulated holes, prevents gas drainage from not leaking.Simultaneously
The method for installing hole sealing tube is advanced to before drilling is fully completed, is carried out after the completion of encapsulated holes construction, after the completion of sealing of hole
It gushs problem in drilling construction if there is gas, extraction can be carried out by the external extraction equipment of hole sealing tube by connecing, effective to control
The problem of drilling gas processed is gushed.Further more, installing hole sealing tube after encapsulated holes of having constructed, solve too long between coal cinder due to drilling
The problem of stress is concentrated and leads to encapsulate bore deformation, and hole sealing tube dress is not into encapsulated holes reduces the secondary construction of encapsulated holes and becomes useless
The probability in hole.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
As shown in Figure 1, a kind of coal mine down-hole drilling sealing of hole structures, it includes encapsulated holes 1, hole sealing tube 3, plug 4, note
Starch pipe 5, return pipe 6 and injection slurry 7.Hole sealing tube 3, the inner wall of encapsulated holes 1 and the outer surface of hole sealing tube 3 are installed in encapsulated holes 1
Between formed slip casting space；Plug 4 is fixedly installed in the slip casting space at 3 both ends of hole sealing tube.
The plug 4 that Grouting Pipe 5 and return pipe 6 pass through outside is extended back into slip casting space, and Grouting Pipe 5 is in slip casting space
Injection slurry is perfused, air extra in slip casting space is discharged, is conducive to injection slurry 7 and fills up slip casting space by return pipe 6.
To guarantee that the coal cinder as caused by drilling construction falls off problem in slip casting space, the quality of sealing of hole is influenced, therefore seal
The necessary long enough of hole depth, the length of usual hole sealing tube 3 are no less than 5m.Note is being perfused in slip casting space in order to prevent simultaneously
When slurries 7, for injection slurry 7 toward the problem of both ends overflow and then influence sealing of hole effect, the closure length of plug 4 is greater than 0.5m, small
In 1m.
Since polyurethane and the inner wall caking property of encapsulated holes 1 are preferable, the integrality after dilatancy hardening is also preferable, can be to sealing of hole
The slip casting space at 3 both ends of pipe forms effective closure, prevents the gas in coal seam from leaking from this, therefore plug 4 is poly- ammonia
Ester foaming material.
Preferably, the polyurethane AB material that the plug 4 selects Langfang thousand thermal insulation material Co., Ltds of remittance to provide.
Grouting Pipe 5 and return pipe 6 have one group or more, and are evenly arranged along the surrounding of hole sealing tube 3.To ensure slip casting space energy
Injection slurry 7 is completely filled out, ideal slip casting effect is reached.
The outside end point of hole sealing tube 3 is welded with ring flange 8, and ring flange 8 is used for external gas drainage equipment, complete in sealing of hole
In drilling construction after, if it find that gas is gushed or revealed, extraction equipment can be connected on ring flange immediately and taken out
It adopts.
A kind of construction method of coal mine down-hole drilling sealing of hole structures, it the following steps are included:
Step 1, the reaming bit for being greater than 3 outer diameter of hole sealing tube using diameter carry out ream operation, reaming construction to scheduled depth
Drilling machine stops drilling afterwards, in the residue backed off after random drill bit cleared up in encapsulated holes 1；
Hole sealing tube 3 is packed into encapsulated holes 1 by step 2；
Step 3 installs plug 4 in the slip casting space at both ends, is reserved with slip casting space between plug 4；
Grouting Pipe 5 and return pipe 6 are passed through plug 4 and extended in slip casting space by step 4；
Step 5 injects injection slurry 7 in slip casting space, after the return pipe 6 wait be located at top has slurries spilling, stops slip casting；
After the completion of step 6, slip casting, a period of time is stood, after the solidification of injection slurry 7, then re-starts drilling construction.
The diameter of encapsulated holes 1 is excessive, and it will cause the wastes of plugging material；The diameter of encapsulated holes 1 is too small, then is not achieved pre-
The sealing of hole effect of phase.Therefore the diameter of reaming bit described in step 1 is 0.5 to 1 times bigger than 3 outer diameter of hole sealing tube.
For encapsulated holes 1 horizontal and upward, the residue in encapsulated holes 1 is cleaned up using hydraulic giant；And for
Encapsulated holes 1 directed downwardly after having cleared up residue with water also need that moisture extraction extra in hole is prevented ponding excessive, hindered
Gas drainage.
It, be after injection slurry 7 completely solidification just after the setting time of injection slurry 7 is the twenty four hours after the completion of slip casting
Can be carried out bore operation, otherwise because caused by the vibration of drilling construction injection slurry cracking will affect sealing of hole effect.
Claims (9)
1. a kind of coal mine down-hole drilling sealing of hole structures, it includes the encapsulated holes (1) being drilled with for gas extraction, and feature exists
In: it is equipped with hole sealing tube (3) in encapsulated holes (1), forms slip casting between the inner wall of encapsulated holes (1) and the outer surface of hole sealing tube (3)
Space；Plug (4) are fixedly installed in the slip casting space at both ends；Grouting Pipe (5) and return pipe (6) pass through plug (4)
It puts in slip casting space；Injection slurry (7) are perfused in slip casting space.
2. a kind of coal mine down-hole drilling sealing of hole structures according to claim 1, it is characterised in that: the length of hole sealing tube (3)
Degree is not less than 5m, and the closure length of plug (4) is greater than 0.5m, is less than 1m.
3. a kind of coal mine down-hole drilling sealing of hole structures according to claim 1, it is characterised in that: plug (4) is poly-
Urethane foamed material.
4. a kind of coal mine down-hole drilling sealing of hole structures according to claim 1, it is characterised in that: Grouting Pipe (5) and return
Slurry pipe (6) has one group or more, is evenly arranged in plug (4).
5. a kind of coal mine down-hole drilling sealing of hole structures according to claim 1, it is characterised in that: hole sealing tube (3) is close
The end point of coal wall is welded with ring flange (8).
6. a kind of construction method of coal mine down-hole drilling sealing of hole structures as claimed in claims 1-5, it is characterised in that: it is wrapped
Include following steps:
Step 1, the reaming bit for being greater than hole sealing tube (3) outer diameter using diameter carry out ream operation, reaming construction to scheduled depth
Drilling machine stops drilling after degree, in the residue backed off after random drill bit cleared up in encapsulated holes (1)；
Hole sealing tube (3) are packed into encapsulated holes (1) by step 2；
Step 3 installs plug (4) in the slip casting space at both ends, and plug is reserved with slip casting space between (4)；
Grouting Pipe (5) and return pipe (6) are passed through plug (4) and extended in slip casting space by step 4；
Step 5 injects injection slurry (7) in slip casting space, after the return pipe (6) wait be located at top has slurries spilling, stops note
Slurry；
After the completion of step 6, slip casting, a period of time is stood, after injection slurry (7) solidification, then re-starts drilling construction.
7. a kind of coal mine down-hole drilling sealing of hole construction method according to claim 6, it is characterised in that: described in step 1
Reaming bit diameter it is 0.5 to 1 times bigger than the outer diameter of hole sealing tube (3).
8. a kind of underground coal mine encapsulated holes sealing of hole construction method according to claim 6, it is characterised in that: for horizontal and
Encapsulated holes (1) upward are cleaned up the residue in encapsulated holes (1) using hydraulic giant；And for encapsulated holes directed downwardly
(1), it after having cleared up residue with water, also needs moisture extraction extra in hole.
9. a kind of underground coal mine encapsulated holes sealing of hole construction method according to claim 6, it is characterised in that: injection slurry (7)
Setting time be slip casting after the completion of twenty four hours after.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910914450.4A CN110529065A (en) | 2019-09-26 | 2019-09-26 | A kind of coal mine down-hole drilling sealing of hole structures and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910914450.4A CN110529065A (en) | 2019-09-26 | 2019-09-26 | A kind of coal mine down-hole drilling sealing of hole structures and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529065A true CN110529065A (en) | 2019-12-03 |
Family
ID=68670130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910914450.4A Pending CN110529065A (en) | 2019-09-26 | 2019-09-26 | A kind of coal mine down-hole drilling sealing of hole structures and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110529065A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294500A (en) * | 2008-05-12 | 2008-10-29 | 淮南矿业(集团)有限责任公司 | Heavy pressure slip-casting hole-sealing method for large-diameter extraction borehole |
| CN103742129A (en) * | 2013-12-30 | 2014-04-23 | 中国矿业大学 | Method for drilling holes on soft coal seam to measure coal seam gas pressure |
| CN103993902A (en) * | 2014-05-22 | 2014-08-20 | 中国矿业大学 | Gas extraction drilled hole two-step grouting hole sealing method |
| CN109577908A (en) * | 2018-11-29 | 2019-04-05 | 中国矿业大学 | A kind of high grouting pressure of powder particle-blocks the mash gas pumping drilling hole sealing device and method in crack |
| CN110080712A (en) * | 2019-05-31 | 2019-08-02 | 西安科技大学 | The closely horizontal mash gas pumping drilling magnetic sealing means in this coal seam of one kind and method |
| CN210660017U (en) * | 2019-09-26 | 2020-06-02 | 贵州盘江精煤股份有限公司 | Underground drilling and hole sealing structure for coal mine |
-
2019
- 2019-09-26 CN CN201910914450.4A patent/CN110529065A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294500A (en) * | 2008-05-12 | 2008-10-29 | 淮南矿业(集团)有限责任公司 | Heavy pressure slip-casting hole-sealing method for large-diameter extraction borehole |
| CN103742129A (en) * | 2013-12-30 | 2014-04-23 | 中国矿业大学 | Method for drilling holes on soft coal seam to measure coal seam gas pressure |
| CN103993902A (en) * | 2014-05-22 | 2014-08-20 | 中国矿业大学 | Gas extraction drilled hole two-step grouting hole sealing method |
| CN109577908A (en) * | 2018-11-29 | 2019-04-05 | 中国矿业大学 | A kind of high grouting pressure of powder particle-blocks the mash gas pumping drilling hole sealing device and method in crack |
| CN110080712A (en) * | 2019-05-31 | 2019-08-02 | 西安科技大学 | The closely horizontal mash gas pumping drilling magnetic sealing means in this coal seam of one kind and method |
| CN210660017U (en) * | 2019-09-26 | 2020-06-02 | 贵州盘江精煤股份有限公司 | Underground drilling and hole sealing structure for coal mine |
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