CN107905762A - A kind of solid powder band pressure grouting dynamic seal hole method - Google Patents
A kind of solid powder band pressure grouting dynamic seal hole method Download PDFInfo
- Publication number
- CN107905762A CN107905762A CN201710939406.XA CN201710939406A CN107905762A CN 107905762 A CN107905762 A CN 107905762A CN 201710939406 A CN201710939406 A CN 201710939406A CN 107905762 A CN107905762 A CN 107905762A
- Authority
- CN
- China
- Prior art keywords
- powder
- drilling
- note
- block plate
- solid
- 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.)
- Granted
Links
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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
A kind of solid powder band pressure grouting dynamic seal hole method, including drainage tube, slurry recovering tube, Grouting Pipe, via hole, annular powder tank, note tube cell, pressure gauge, note powder machine, preceding block plate, block plate afterwards, plug, pass through the annular powder tank of hydraulic slotted liner technique construction in bore inner, in the symmetrical via hole of drilling vertical direction construction, by filling system, into drilling, slip casting seals the part between two block plates, the annular powder tank of powder filling and its anterior gap are noted into via hole by noting powder system, on the one hand the solid powder of injection can form barrier wall barrier extraneous air, on the other hand can be in suction function retrofilling drilling surrounding medium crack, and can be according to the reading of pressure gauge on note tube cell to drilling into Mobile state note powder sealing, achieve the purpose that the permanently effective sealing of drilling.
Description
Technical field
The present invention relates to coal mine gas drainage technical field, more particularly to a kind of coal bed gas extraction drilling and sealing method and
Its hole sealing structure.
Background technology
One of China is main coal producer in the world, while be also the country of coal and gas prominent most serious.China's coal
Reservoir formation is complicated, and (coal seam pressure is relatively low, coal seam permeability is low, the shape in the case where hydraulic pressure such as splits at the enhancements in " three low one is high "
Into the ratio that deliberately ruptures shared by crack of length it is relatively low；Coal seam generally has higher adsorption capacity) physical property characteristic.At present, watt
This extraction is the prevention most effective measure of Gas Disaster, and the primary work of extraction is construction drill, and the most important condition is borehole sealing.
In current gas pumping there is sealing of hole it is not tight the problem of, gas leakage is serious during causing extraction, and gas density decay is very fast, takes out
Difficulty is adopted, it is less efficient.
The common drilling and sealing technology of China's coal-mine gas pumping has at present：Cement mortar sealing of hole, polyurethane sealing of hole, sealing of hole
Device sealing of hole etc., though these technologies are widely used all there is some defects, as cement mortar sealing of hole after condensation with the wall of a borehole
Between can produce gap；Polyurethane sealing hole operation is cumbersome, higher to sealing of hole personnel's technical requirements, and easily causes waste of material,
And pollute the environment；Hole packer sealing of hole cost is higher and hole sealing depth is limited.
The content of the invention
To solve problem above, combine dynamic method for sealing the present invention provides a kind of solid powder and with pressure grouting, should
Method can effective filling borehole surrounding medium crack, realize to the permanent effective sealing that drills.The present invention is able to ensure that gas
Effective extraction time, improve gas extraction concentration.This method is easy to operate, and cost is relatively low, good airproof performance.
To achieve the above objectives, the present invention provides a kind of solid powder-band pressure grouting dynamic seal hole method, this method bag
Include following steps：
A. drilled in coal seam by drilling machine construction, by the annular powder tank of hydraulic slotted liner technique construction, the annular powder tank thickness
For 0.3~0.4m, away from 0.7~0.8m of drilling orifice, and its outer shroud radius is 4 times of boring radius；
B. in drilling vertical direction two symmetrical via holes being connected with annular powder tank of construction, its radius is drilling
The 1/3~1/2 of radius；
C. drainage tube is sent into drilling through the jack four on the jack one and rear block plate on preceding block plate, makes preceding block plate
At embedded annular powder tank position, before Grouting Pipe and slurry recovering tube are inserted into respectively in the jack two and jack three of block plate, bored in distance
Installed plug at 0.1~0.5m of hole aperture, note tube cell is sent into via hole at 0.2m, using conventional method for sealing that its is close
Envelope；
D. by pressure gauge on note tube cell, note tube cell is connected with note powder machine, and solid powder is housed in note powder machine；
E. Grouting Pipe is connected to grouting pump, starts slip casting, until there is slurries outflow to stop slip casting in slurry recovering tube；
F. start note powder machine, solid powder is injected into drilling and annular powder tank by via hole, until pressure gauge reading
No longer rise, close note powder machine；
G. extraction system is opened, starts mash gas extraction, with the progress of extraction, a large amount of solid powders enter under suction function
Coalmass crevasse, infiltration passage of the closure air in coal seam；
H. when gas density decreases, pressure gauge reading declines, at this time repeat step f, until extraction terminates.
The front disc thickness is the hollow disk of 0.2~0.3m, and two bottom surfaces and side are net structure, rear block plate
The solid disk for being 0.2~0.3m for thickness.
Beneficial effect
A kind of solid powder-band pressure grouting dynamic seal hole method of the present invention, in the annular powder tank of sealing of hole sections leading portion construction and is noted
Enter solid powder, on the one hand barrier wall can be formed by the solid powder in powder tank, stop that outside air enters extraction system.Separately
On the one hand, with the progress of extraction, powder can enter the crack inside coal body under suction function and slurries condense the sky produced
Gap.Note tube cell on pressure gauge is set, when leak air in drilling situation when, pressure gauge reading can decline, and can open at this time
Note powder machine note powder is opened, dynamic sealing is realized, extends effective extraction phase, improve gas extraction concentration.Note the solid powder in powder machine
It can be selected bastard coal mountain flour, raw material are economic and environment-friendly easy to obtain and cheap.
Brief description of the drawings
Fig. 1 is a kind of solid powder-band pressure grouting dynamic seal hole embodiment of the method schematic diagram of the present invention；
Fig. 2 is front dish structure schematic diagram；
Fig. 3 is the structure diagram of rear block plate.
In figure：1-coal seam；2-drilling；3-drainage tube；4-slurry recovering tube；5-Grouting Pipe；6-via hole；7-powder tank；
8-note tube cell；9-pressure gauge；10-note powder machine；11-preceding block plate；12-rear block plate；13-plug；14-jack one；15—
Jack two；16-jack three；17-jack four.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
A kind of solid powder-band pressure grouting dynamic seal hole method as shown in Figures 1 and 2, passes through drilling machine in coal seam 1 first
Construction drill 2, by the annular powder tank 7 of hydraulic slotted liner technique construction, annular 7 thickness of powder tank is 0.3~0.4m, away from 2 apertures that drill
0.7~0.8m, and its outer shroud radius is 4 times of 2 radiuses of drilling；2 vertical direction that drill construct two it is symmetrical with annular
The via hole 6 that powder tank 7 is connected, its radius are the 1/3~1/2 of 2 radiuses of drilling；Drainage tube 3 is passed through into inserting on preceding block plate 11
Jack 4 15 on hole 1 and rear block plate 12, is sent into drilling 2, and block plate 11 is embedded at annular 7 position of powder tank before making, by slip casting
Before pipe 5 and slurry recovering tube 4 are inserted into respectively in the jack 2 17 and jack 3 16 of block plate 11, at 2 0.1~0.5m of aperture of distance drilling
Installed plug 13, note tube cell 8 is sent into via hole 6 at 0.2m, is sealed against using conventional method for sealing；Pressure gauge 9 is filled
On note tube cell 8, note tube cell 8 is connected with note powder machine 10, and solid powder is housed in note powder machine 10；Grouting Pipe 5 is connected to grouting pump,
Start slip casting, until there is slurries outflow to stop slip casting in slurry recovering tube 4；Start note powder machine 10, by via hole 6 to drilling 2 and ring
Injection solid powder in shape powder tank 7, until 9 reading of pressure gauge no longer rises, closes note powder machine 10；Extraction system is opened, is started
Mash gas extraction, with the progress of extraction, a large amount of solid powders enter coalmass crevasse under suction function, and closure air is in coal seam
Penetrate into passage；When gas density decreases, pressure gauge reading declines, at this time repeat step f, until extraction terminates.
11 thickness of preceding block plate is the hollow disk of 0.2~0.3m, and two bottom surfaces and side are net structure, rear gear
Disk 12 is the solid disk that thickness is 0.2~0.3m.
One aspect of the present invention can form barrier wall by the solid powder in powder tank, stop that outside air enters extraction system
System.On the other hand, with the progress of extraction, powder can enter the crack inside coal body under suction function and slurries are condensed and produced
Gap.When leak air in drilling situation when, open note powder machine note powder, realize dynamic sealing, extend effective extraction phase, improve
Gas extraction concentration.
Claims (2)
1. a kind of solid powder-band pressure grouting dynamic seal hole method, it is characterised in that include the following steps：
A. drilled (2) by drilling machine construction in coal seam (1), by the annular powder tank (7) of hydraulic slotted liner technique construction, the annular powder tank
(7) thickness is 0.3~0.4m, and away from drilling (2) 0.7~0.8m of aperture, and its outer shroud radius is 4 times of drilling (2) radius；
B. in drilling (2) vertical direction two symmetrical via holes (6) being connected with annular powder tank (7) of construction, its radius
For the 1/3~1/2 of drilling (2) radius；
C. drainage tube (3) is sent into through the jack four (15) on the jack one (14) and rear block plate (12) on preceding block plate (11)
Drill in (2), make at embedded annular powder tank (7) position of preceding block plate (11), before Grouting Pipe (5) and slurry recovering tube (4) are inserted into respectively
In the jack two (17) and jack three (16) of block plate (11), the installed plug (13) at distance drilling (2) 0.1~0.5m of aperture,
Note tube cell (8) is sent at via hole (6) interior 0.2m, is sealed against using conventional method for sealing；
D. by pressure gauge (9) on note tube cell (8), note tube cell (8) is connected with note powder machine (10), equipped with solid in note powder machine (10)
Body powder；
E. Grouting Pipe (5) is connected to grouting pump, starts slip casting, until there is slurries outflow to stop slip casting in slurry recovering tube (4)；
F. note powder machine (10) is started, by via hole (6) to drilling (2) and the interior injection solid powder of annular powder tank (7), until pressure
Power table (9) reading no longer rises, and closes note powder machine (10)；
G. extraction system is opened, starts mash gas extraction, with the progress of extraction, a large amount of solid powders enter coal body under suction function
Crack, infiltration passage of the closure air in coal seam；
H. when gas density decreases, pressure gauge reading declines, at this time repeat step f, until extraction terminates.
A kind of 2. solid powder according to claim 1-band pressure grouting dynamic seal hole method, it is characterised in that：Before described
Block plate (11) thickness is the hollow disk of 0.2~0.3m, and two bottom surfaces and side are net structure, and rear block plate (12) is thickness
For the solid disk of 0.2~0.3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939406.XA CN107905762B (en) | 2017-10-11 | 2017-10-11 | A kind of solid powder-grouting with pressure dynamic method for sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939406.XA CN107905762B (en) | 2017-10-11 | 2017-10-11 | A kind of solid powder-grouting with pressure dynamic method for sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107905762A true CN107905762A (en) | 2018-04-13 |
| CN107905762B CN107905762B (en) | 2019-11-22 |
Family
ID=61841274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710939406.XA Active CN107905762B (en) | 2017-10-11 | 2017-10-11 | A kind of solid powder-grouting with pressure dynamic method for sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107905762B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627766A (en) * | 2020-12-23 | 2021-04-09 | 中煤科工集团重庆研究院有限公司 | External injection compensation type hole sealing structure and method for gas extraction drill hole |
| CN114278344A (en) * | 2021-12-27 | 2022-04-05 | 安徽理工大学 | Water spraying control method for separated layer crushing roof of tunneling roadway |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016459A1 (en) * | 1999-08-27 | 2001-03-08 | Sabre Oxidation Technologies, Inc. | Chemical injector for oil well treatment |
| CN102352225A (en) * | 2011-07-04 | 2012-02-15 | 周福宝 | Powder for plugging air leaking crack |
| CN202900144U (en) * | 2012-10-23 | 2013-04-24 | 蔡长辉 | Hole sealing device for coal bed bedding hole |
| CN103161443A (en) * | 2013-04-10 | 2013-06-19 | 中国矿业大学 | Detection and sealing integrated method and device for gas extraction drill hole |
| CN103742098A (en) * | 2013-12-30 | 2014-04-23 | 平顶山天安煤业股份有限公司 | Device and method for sealing hole by using returned slag of layer-through drill hole of low drainage roadway of coal mine |
| CN105507940A (en) * | 2016-01-11 | 2016-04-20 | 山东科技大学 | Slotting, plugging and fracturing integrated type intensified marsh gas extraction device and method |
-
2017
- 2017-10-11 CN CN201710939406.XA patent/CN107905762B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016459A1 (en) * | 1999-08-27 | 2001-03-08 | Sabre Oxidation Technologies, Inc. | Chemical injector for oil well treatment |
| CN102352225A (en) * | 2011-07-04 | 2012-02-15 | 周福宝 | Powder for plugging air leaking crack |
| CN202900144U (en) * | 2012-10-23 | 2013-04-24 | 蔡长辉 | Hole sealing device for coal bed bedding hole |
| CN103161443A (en) * | 2013-04-10 | 2013-06-19 | 中国矿业大学 | Detection and sealing integrated method and device for gas extraction drill hole |
| CN103742098A (en) * | 2013-12-30 | 2014-04-23 | 平顶山天安煤业股份有限公司 | Device and method for sealing hole by using returned slag of layer-through drill hole of low drainage roadway of coal mine |
| CN105507940A (en) * | 2016-01-11 | 2016-04-20 | 山东科技大学 | Slotting, plugging and fracturing integrated type intensified marsh gas extraction device and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627766A (en) * | 2020-12-23 | 2021-04-09 | 中煤科工集团重庆研究院有限公司 | External injection compensation type hole sealing structure and method for gas extraction drill hole |
| CN112627766B (en) * | 2020-12-23 | 2022-12-27 | 中煤科工集团重庆研究院有限公司 | External injection compensation type hole sealing method for gas extraction drill hole |
| CN114278344A (en) * | 2021-12-27 | 2022-04-05 | 安徽理工大学 | Water spraying control method for separated layer crushing roof of tunneling roadway |
| CN114278344B (en) * | 2021-12-27 | 2024-02-13 | 安徽理工大学 | Method for preventing and controlling water spraying of separation broken roof of tunneling roadway |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107905762B (en) | 2019-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105332684B (en) | A kind of water under high pressure is quick-fried and CO2The coal bed gas displacement extraction technique that pressure break is combined | |
| CN101294500B (en) | Heavy pressure slip-casting hole-sealing method for large-diameter extraction borehole | |
| CN207131371U (en) | Coal mine gas drainage holes controllable capsule bag type hole-sealing device with pressure | |
| CN103452525B (en) | Gas takes out fixed stopper and using method thereof | |
| CN102704984B (en) | Borehole high-concentration gas extraction and drainage method and device thereof | |
| CN105507940B (en) | One kind cuts envelope pressure integration and strengthens gas pumping device and method | |
| CN207892585U (en) | Three stifled two note hole sealing devices of coal mine gas extraction drill hole | |
| CN109723404A (en) | Coal measure gas prospect pit naked eye device for plugging and method | |
| CN102635393A (en) | Combined hole sealing method for gas extracting and drilling delaying self-expansion capsule-paste | |
| CN209670939U (en) | A kind of coal mine gas extraction drill hole long range multi-stage cementing hole packer | |
| CN209261534U (en) | A kind of combined type coal-bed flooding and gas drainage hole sealing device | |
| WO2019137073A1 (en) | Multi-stage pressure bearing permeable hole sealing method and device | |
| CN109915070A (en) | The down-hole coal bed test gas pressure hole sealing device of one kind and method | |
| CN102200002A (en) | method and device for sealing upward hole at high pressure by sections | |
| CN107060687A (en) | Subsection filling formula slip-casting hole-sealing method based on fluid | |
| CN107905762B (en) | A kind of solid powder-grouting with pressure dynamic method for sealing | |
| CN207048813U (en) | Sealing and leakage plugging device for gas pumping | |
| CN106837240A (en) | Segmentation capsule-type injection hole sealing device and its method for sealing based on fluid | |
| CN106351606B (en) | The method for improving sealing of hole effect based on wall-rock crack holing structure | |
| CN109372572A (en) | A kind of efficient pumping method of low-permeability coal-bed gas | |
| CN208900072U (en) | A kind of novel bag type paste hole packer | |
| CN103147741B (en) | Coal bed roadside pressure relief zone width measuring method based on drill hole gas leakage | |
| WO2020006870A1 (en) | Gas extraction hole drilling and hole sealing method for building anti-seepage barrier based on grooving-backfilling method | |
| CN105317397A (en) | Double cloth bags type grouting sealing set and method | |
| CN209556980U (en) | Coal measure gas prospect pit naked eye device for plugging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |