CN101845944A - Method for sealing gas drainage boreholes at specified positions - Google Patents
Method for sealing gas drainage boreholes at specified positions Download PDFInfo
- Publication number
- CN101845944A CN101845944A CN201010174725A CN201010174725A CN101845944A CN 101845944 A CN101845944 A CN 101845944A CN 201010174725 A CN201010174725 A CN 201010174725A CN 201010174725 A CN201010174725 A CN 201010174725A CN 101845944 A CN101845944 A CN 101845944A
- Authority
- CN
- China
- Prior art keywords
- sealing
- flexible sleeve
- capsule
- filling material
- sleeve
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000004744 fabric Substances 0.000 claims abstract description 26
- 229920000742 Cotton Polymers 0.000 claims abstract description 15
- 239000002775 capsule Substances 0.000 claims description 44
- 238000005086 pumping Methods 0.000 claims description 25
- 238000000605 extraction Methods 0.000 claims description 21
- 238000005553 drilling Methods 0.000 claims description 17
- 229920002521 macromolecule Polymers 0.000 claims description 10
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 238000007613 slurry method Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Landscapes
- Pipe Accessories (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a method for sealing gas drainage boreholes at specified positions, which comprises a drainage tube, an injection tube and a flexible sleeve, the flexible sleeve is sleeved on the front part of the drainage tube, the injection tube is inserted into the flexible sleeve, and both ends of the flexible sleeve are then tightly bound on the drainage tube; the drainage tube and the injection tube are put into the specified position of a gas drainage borehole together, the injection tube injects sealing filling material into the hermetic flexible sleeve until the flexible sleeve is filled up with the sealing filling material, and after the filling material is expanded, the borehole is sealed. The distance between the outer end of the flexible sleeve and the orifice of the borehole is larger than 8m, and the length of the flexible sleeve is larger than 2m; the flexible sleeve consists of a cotton cloth sleeve section and an antistatic waterproof cloth sleeve section, and the waterproof cloth of the flexible sleeve is used for preventing the seepage of the sealing filling material; and the diameter of the flexible sleeve is larger than the diameter of the gas drainage borehole, so that the radially expanded sealing filling material can be tightly combined with the wall of the borehole. The method has the advantages of good borehole sealing effect, high drained gas concentration, long effective drainage time and simple and quick operation.
Description
Technical field
The present invention relates to a kind of method of sealing gas drainage boreholes at specified positions, be applicable to hole sealing depth, the raising gas pumping effect of accurate control hole sealing depth and sealing of hole position, increase mash gas pumping drilling.
Background technology
Gas is one of colliery five the Nature disasters, and the safety of mine in serious threat.For control gas disaster, guarantee mine safety production, construction drill extraction coal seam or goaf gas are the effective measures that reduce coal seam gas-bearing capacity and face gas outburst amount.The gas pumping rate of China's coal-mine is generally lower, and except the influence that is subjected to the little grade of gas permeability of coal seam coefficient geological conditions, most important reason is that the sealing quality of boring is poor, causes gas leakage serious, and gas pumping concentration is low.
Present stage, China's coal-mine mainly adopts the macromolecule polymeric material sealing gas extraction borehole of polyurethanes, and wherein macromolecule polymeric material is generated by two kinds of chemical grout mixing afterreactions, and hole-sealing technology mainly contains circumvolution slurry method and pressure injection slurry method.Because the very short time of chemical grout after mix stirring, (just begin reaction in 40～60s), hole sealing depth can only reach 4～5m when therefore adopting the circumvolution slurry method, because of the relaxation zone that can not effectively avoid the tunnel causes sealing quality relatively poor.When adopting pressure injection slurry method sealing of hole, though can increase hole sealing depth, but since need be in the gas pumping pipe section block plate is installed or is tied up and twine cotton yarn, increased the cross section of section in the gas pumping pipe, if certain distortion takes place in boring or hole quality is poor, block plate or veil reduce in the boring cross section or distortion place very likely is stuck, thereby the gas pumping pipe can not be sent to the design attitude in the boring, cause sealing of hole poor effect or failure.
Summary of the invention
The present invention seeks at the weak point in the prior art, a kind of method that can accurately control the sealing gas drainage boreholes at specified positions of hole sealing depth and sealing of hole position, the hole sealing depth that increases mash gas pumping drilling, raising gas pumping effect is provided.
The method of sealing gas drainage boreholes at specified positions of the present invention comprises extraction pipe and Grouting Pipe, and concrete steps are as follows:
A, to form total length at the anterior suit of extraction pipe by cotton cloth sleeve section and antistatic waterproof cloth sleeve capsule section be l
2Flexibility sleeve capsule, Grouting Pipe is inserted in the flexible sleeve capsule, the two ends binding of the capsule of then flexibility being tucked inside the sleeve is sealed and is fixed on the extraction pipe;
B, the extraction pipe and the Grouting Pipe that will be fixed with flexible sleeve capsule are sent in the mash gas pumping drilling, make the outer end of flexible sleeve capsule and the orifice distance l of mash gas pumping drilling
1Be not less than 8m;
C, inject sealing filling material by Grouting Pipe in the flexibility of sealing sleeve capsule, until being full of flexible sleeve capsule, sealing filling material is finished sealing of hole after expanding.
The pore size of described cotton cloth sleeve section is 0.3～2mm; The total length l of described flexible sleeve capsule
2Greater than 2m, wherein the length of antistatic waterproof cloth sleeve capsule section is 0.3～1m; The diameter of described flexible sleeve capsule is greater than the diameter of mash gas pumping drilling; Described sealing filling material is the macromolecule polymeric material of polyurethanes.
Beneficial effect: the present invention compared with prior art:
(1) eliminates the macromolecule polymeric material reaction speed soon to the influence of hole-sealing technology, enlarged markedly the hole sealing depth of mash gas pumping drilling, accurately controlled the sealing of hole position simultaneously, made the sealing of hole section effectively avoid the relaxation zone in tunnel, improved the sealing of hole effect;
(2) adopt airtight flexibility sleeve capsule to limit the free wxpansion of macromolecule polymeric material, make it main along the boring expanded radially, both improve flexible sleeve capsule and macromolecule polymeric material and the bonding tightness degree of boring, strengthened the compactness of macromolecule polymeric material again;
(3) eliminate factors such as mash gas pumping drilling hole quality difference to inserting the influence of extraction pipe, can realize inserting smoothly the extraction pipe.
(4) can increase hole sealing depth, raising sealing quality, sealing of hole is effective, and mash gas extraction concentration height can prolong about 1～2 month of effective extraction phase, and its method is simple, and is easy to operate, rapid.
Description of drawings
Fig. 1 is the schematic diagram of the present invention to up hole sealing of hole;
Fig. 2 is the schematic diagram of the present invention to descending hole sealing of hole.
Among the figure: mash gas pumping drilling 1, extraction pipe 2, Grouting Pipe 3, sealing filling material 4, flexible sleeve capsule 5, cotton cloth sleeve 5-1, canvas cloth sleeve capsule 5-2.
The specific embodiment
Below in conjunction with accompanying drawing example of the present invention is further described:
Embodiment one, shown in Figure 1, up hole method for sealing: the anterior suit of the extraction pipe 2 in preparing insertion gas pumping hole 1 is formed total length l by cotton cloth sleeve section 5-2 and antistatic waterproof cloth sleeve capsule section 5-1
2Be the flexibility sleeve capsule 5 of 2～4m, the diameter of flexible sleeve capsule 5 is greater than the diameter of mash gas pumping drilling 1, can contact with the hole wall of mash gas pumping drilling 1 after sealing filling material 4 is expanded.Cotton cloth sleeve section 5-2 is inside, and antistatic waterproof cloth sleeve capsule section 5-1 section is outside, and the pore size of cotton cloth sleeve section 5-2 is 0.3～2mm, can permeate on a small quantity when liquid sealing filling material 4 is flowed on cotton, favourablely combines with the extraction hole wall; The length of antistatic waterproof cloth sleeve capsule section 5-1 is 0.3～1m, to guarantee that slurries do not leak outside.Grouting Pipe 3 is inserted in the flexible sleeve capsule 5, and the two ends binding of the capsule 5 of then flexibility being tucked inside the sleeve is sealed and is fixed on the extraction pipe 2; Tying up should be firm, radially expand to guarantee sealing filling material 4 to be subjected to the constraint at flexible sleeve capsule 5 two ends when expanding, make the hole wall close adhesion of itself and mash gas pumping drilling 1, simultaneously because the expansion space of sealing filling material 4 is limited, the compactness after can strengthening it and expanding.During sealing, the extraction pipe 2 and the Grouting Pipe 3 that will be fixed with flexible sleeve capsule 5 are earlier sent in the mash gas pumping drilling 1 that excavation is good routinely in the lump, make the outer end of flexible sleeve capsule 5 and the orifice distance l of mash gas pumping drilling 1
1Be not less than 8m, avoid the relaxation zone in tunnel, to improve sealing quality and to prolong effective extraction time to guarantee the sealing of hole section.By grouting pump slip casting, transport under the pressure effect at grouting pump at last, sealing filling material 4 is injected in the flexibility sleeve capsule 5 that seals by Grouting Pipe 3, until being full of flexible sleeve capsule 5.Sealing filling material 4 adopts the macromolecule polymeric material of polyurethanes.The macromolecule polymeric material that enters the polyurethanes in the flexible sleeve capsule 5 flows into the antistatic waterproof cloth sleeve capsule section 5-1 of lower earlier in flow process, gather gradually again to cotton cloth sleeve section 5-2, this moment, a spot of sealing filling material 4 penetrated from the hole of cotton cloth sleeve section 5-2, bonding with mash gas pumping drilling 1 improves flexible sleeve capsule 5 sealing effectivenesss.After expanding, filler 4 reactions promptly finish sealing of hole.
Embodiment two, shown in Figure 2, descending hole method for sealing: opposite because the angle direction of closed hole is downward with the angle direction of up closed hole, be sleeved on the total length l that constitutes by cotton cloth sleeve section 5-2 and antistatic waterproof cloth sleeve capsule section 5-1 of extraction pipe 2 front portions
2The flexibility sleeve capsule 5 that is 2～4m is also opposite, and promptly cotton cloth sleeve section 5-2 is outside, and antistatic waterproof cloth sleeve capsule section 5-1 section is inside, and other is all identical with embodiment one, and same section slightly.
Claims (5)
1. the method for a sealing gas drainage boreholes at specified positions comprises extraction pipe (2) and Grouting Pipe (3), it is characterized in that:
A, to form total length at the anterior suit of extraction pipe (2) by cotton cloth sleeve section (5-2) and antistatic waterproof cloth sleeve capsule section (5-1) be l
2Flexibility sleeve capsule (5), Grouting Pipe (3) is inserted in the flexible sleeve capsule (5), the binding of the two ends of the capsule (5) of then flexibility being tucked inside the sleeve is sealed and is fixed on the extraction pipe (2);
B, the extraction pipe (2) and the Grouting Pipe (3) that will be fixed with flexible sleeve capsule (5) are sent in the mash gas pumping drilling (1), make the outer end of flexible sleeve capsule (5) and the orifice distance l of mash gas pumping drilling (1)
1Be not less than 8m;
C, in the flexibility of sealing sleeve capsule (5), inject sealing filling material (4),, finish sealing of hole after sealing filling material (4) expansion until being full of flexible sleeve capsule (5) by Grouting Pipe (3).
2. the method for sealing gas drainage boreholes at specified positions according to claim 1, it is characterized in that: the pore size of described cotton cloth sleeve section (5-2) is 0.3～2mm.
3. the method for sealing gas drainage boreholes at specified positions according to claim 1 is characterized in that: the total length l of described flexible sleeve capsule (5)
2Greater than 2m, wherein the length of antistatic waterproof cloth sleeve capsule section (5-1) is 0.3～1m.
4. the method for sealing gas drainage boreholes at specified positions according to claim 1 is characterized in that: the diameter of described flexible sleeve capsule (5) is greater than the diameter of mash gas pumping drilling (1).
5. the method for sealing gas drainage boreholes at specified positions according to claim 1, it is characterized in that: described sealing filling material (4) is the macromolecule polymeric material of polyurethanes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010174725 CN101845944B (en) | 2010-05-08 | 2010-05-08 | Method for sealing gas drainage boreholes at specified positions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010174725 CN101845944B (en) | 2010-05-08 | 2010-05-08 | Method for sealing gas drainage boreholes at specified positions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101845944A true CN101845944A (en) | 2010-09-29 |
| CN101845944B CN101845944B (en) | 2013-06-05 |
Family
ID=42770734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010174725 Active CN101845944B (en) | 2010-05-08 | 2010-05-08 | Method for sealing gas drainage boreholes at specified positions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101845944B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561992A (en) * | 2012-01-29 | 2012-07-11 | 山东大学 | Deformation water stopper and grouting plugging process adopting same |
| CN102562133A (en) * | 2012-01-16 | 2012-07-11 | 中国矿业大学 | Device and method for sealing and drilling holes of gas drainage |
| CN102966370A (en) * | 2011-09-01 | 2013-03-13 | 淮南矿业(集团)有限责任公司 | Drainage borehole plugging device and method |
| CN102966371A (en) * | 2011-09-01 | 2013-03-13 | 淮南矿业(集团)有限责任公司 | Drainage borehole plugging device and method |
| CN102979478A (en) * | 2012-12-05 | 2013-03-20 | 山东大学 | Water stopping device for water inrush borehole drilling |
| CN102996159A (en) * | 2012-12-03 | 2013-03-27 | 中国矿业大学 | Multiphase medium plugging device and method for gas extraction drill hole |
| CN103075127A (en) * | 2012-12-27 | 2013-05-01 | 中国矿业大学 | Device and method for sealing drill hole by flexible filling material |
| CN103334714A (en) * | 2013-07-23 | 2013-10-02 | 蔡长辉 | Bag device for quickly sealing holes |
| CN103352675A (en) * | 2013-07-01 | 2013-10-16 | 陕西煤业化工技术研究院有限责任公司 | Gas extraction, drilling and sealing device and method |
| CN103410469A (en) * | 2013-07-08 | 2013-11-27 | 孔维一 | Spraying type gas extraction hole sealing process |
| CN104033175A (en) * | 2014-06-20 | 2014-09-10 | 米勇龙 | Gas discharge system |
| CN106677741A (en) * | 2017-01-06 | 2017-05-17 | 山东科技大学 | Fixed point sealing method for gas extraction drilled hole |
| CN106837308A (en) * | 2017-03-29 | 2017-06-13 | 中铁十七局集团第三工程有限公司 | A kind of gas tunnel pressure tester and its method |
| CN114458232A (en) * | 2022-02-09 | 2022-05-10 | 煤炭科学技术研究院有限公司 | Self-adaptive pressure-maintaining sealing device and method for drilling |
| CN115853469A (en) * | 2022-12-29 | 2023-03-28 | 中国矿业大学(北京) | Fixed-point gas extraction device and method based on extraction holes in different depths |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3901319A (en) * | 1973-11-02 | 1975-08-26 | Coal Industry Patents Ltd | Sealing a tube in a bore |
| CN2193428Y (en) * | 1994-04-22 | 1995-03-29 | 河南省煤炭科学研究所 | Aerated capsule hole sealing device for mine gas ventilation |
| RU2307913C2 (en) * | 2004-12-17 | 2007-10-10 | Закрытое акционерное общество "Экогермет-У" | Heat-insulated string |
| CN101050696A (en) * | 2007-05-10 | 2007-10-10 | 河南理工大学 | Bag type paste injection hole sealing device and its hole sealing method |
| CN201187324Y (en) * | 2008-05-09 | 2009-01-28 | 河南理工大学 | Gas column hole packer |
| CN201193533Y (en) * | 2008-04-10 | 2009-02-11 | 中国矿业大学 | Secondary hole-sealing device for mash gas drill holes |
| CN101482026A (en) * | 2009-02-10 | 2009-07-15 | 河南理工大学 | Gas extraction secondary high-pressure slip-casting hole-sealing apparatus and its hole-sealing method |
-
2010
- 2010-05-08 CN CN 201010174725 patent/CN101845944B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3901319A (en) * | 1973-11-02 | 1975-08-26 | Coal Industry Patents Ltd | Sealing a tube in a bore |
| CN2193428Y (en) * | 1994-04-22 | 1995-03-29 | 河南省煤炭科学研究所 | Aerated capsule hole sealing device for mine gas ventilation |
| RU2307913C2 (en) * | 2004-12-17 | 2007-10-10 | Закрытое акционерное общество "Экогермет-У" | Heat-insulated string |
| CN101050696A (en) * | 2007-05-10 | 2007-10-10 | 河南理工大学 | Bag type paste injection hole sealing device and its hole sealing method |
| CN201193533Y (en) * | 2008-04-10 | 2009-02-11 | 中国矿业大学 | Secondary hole-sealing device for mash gas drill holes |
| CN201187324Y (en) * | 2008-05-09 | 2009-01-28 | 河南理工大学 | Gas column hole packer |
| CN101482026A (en) * | 2009-02-10 | 2009-07-15 | 河南理工大学 | Gas extraction secondary high-pressure slip-casting hole-sealing apparatus and its hole-sealing method |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966370A (en) * | 2011-09-01 | 2013-03-13 | 淮南矿业(集团)有限责任公司 | Drainage borehole plugging device and method |
| CN102966371A (en) * | 2011-09-01 | 2013-03-13 | 淮南矿业(集团)有限责任公司 | Drainage borehole plugging device and method |
| CN102966370B (en) * | 2011-09-01 | 2015-04-29 | 淮南矿业(集团)有限责任公司 | Drainage borehole plugging device and method |
| CN102562133B (en) * | 2012-01-16 | 2013-12-11 | 中国矿业大学 | Device and method for sealing and drilling holes of gas drainage |
| CN102562133A (en) * | 2012-01-16 | 2012-07-11 | 中国矿业大学 | Device and method for sealing and drilling holes of gas drainage |
| CN102561992A (en) * | 2012-01-29 | 2012-07-11 | 山东大学 | Deformation water stopper and grouting plugging process adopting same |
| CN102561992B (en) * | 2012-01-29 | 2013-11-06 | 山东大学 | Grouting plugging process adopting deformation water stopper |
| CN102996159A (en) * | 2012-12-03 | 2013-03-27 | 中国矿业大学 | Multiphase medium plugging device and method for gas extraction drill hole |
| CN102996159B (en) * | 2012-12-03 | 2015-04-29 | 中国矿业大学 | Multiphase medium plugging device and method for gas extraction drill hole |
| CN102979478A (en) * | 2012-12-05 | 2013-03-20 | 山东大学 | Water stopping device for water inrush borehole drilling |
| WO2014101653A1 (en) * | 2012-12-27 | 2014-07-03 | 中国矿业大学 | Drilling hole sealing apparatus and method using flexible filling material |
| CN103075127B (en) * | 2012-12-27 | 2016-02-24 | 中国矿业大学 | A kind of flexible filling material drilling and sealing device and method |
| CN103075127A (en) * | 2012-12-27 | 2013-05-01 | 中国矿业大学 | Device and method for sealing drill hole by flexible filling material |
| CN103352675A (en) * | 2013-07-01 | 2013-10-16 | 陕西煤业化工技术研究院有限责任公司 | Gas extraction, drilling and sealing device and method |
| CN103352675B (en) * | 2013-07-01 | 2016-08-17 | 陕西煤业化工技术研究院有限责任公司 | A kind of mash gas pumping drilling sealing device and method |
| CN103410469A (en) * | 2013-07-08 | 2013-11-27 | 孔维一 | Spraying type gas extraction hole sealing process |
| CN103334714A (en) * | 2013-07-23 | 2013-10-02 | 蔡长辉 | Bag device for quickly sealing holes |
| CN104033175A (en) * | 2014-06-20 | 2014-09-10 | 米勇龙 | Gas discharge system |
| CN106677741A (en) * | 2017-01-06 | 2017-05-17 | 山东科技大学 | Fixed point sealing method for gas extraction drilled hole |
| CN106837308A (en) * | 2017-03-29 | 2017-06-13 | 中铁十七局集团第三工程有限公司 | A kind of gas tunnel pressure tester and its method |
| CN106837308B (en) * | 2017-03-29 | 2024-01-12 | 中铁十七局集团第三工程有限公司 | Gas tunnel pressure measuring device and method thereof |
| CN114458232A (en) * | 2022-02-09 | 2022-05-10 | 煤炭科学技术研究院有限公司 | Self-adaptive pressure-maintaining sealing device and method for drilling |
| CN115853469A (en) * | 2022-12-29 | 2023-03-28 | 中国矿业大学(北京) | Fixed-point gas extraction device and method based on extraction holes in different depths |
| CN115853469B (en) * | 2022-12-29 | 2023-06-13 | 中国矿业大学(北京) | Fixed-point gas extraction device and method based on different depths of extraction holes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101845944B (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101845944B (en) | Method for sealing gas drainage boreholes at specified positions | |
| CN103075128B (en) | A kind of method for sealing of mash gas pumping drilling | |
| CN102691296B (en) | Pipe pile foundation for static-pressure grouting on pile side and rotary jet grouting at pile bottom and construction method thereof | |
| CN102704984B (en) | Borehole high-concentration gas extraction and drainage method and device thereof | |
| CN109339736A (en) | A kind of mash gas pumping drilling solid-liquid two-phase hole sealing device and technique | |
| CN107313799A (en) | A kind of sealing and leakage plugging device and method for gas pumping | |
| CN105696967A (en) | Mining hole packer and hole packing method | |
| CN204252941U (en) | Mining hole-sealing gas hole packer with pressure | |
| CN102913184B (en) | Secondary composite high-pressure grouting and sealing process of gas drainage drilling artificial separation barrier | |
| CN101929342B (en) | Gob-side entry retaining concrete partition wall construction mold bag and construction method thereof | |
| CN102996159A (en) | Multiphase medium plugging device and method for gas extraction drill hole | |
| CN106223897B (en) | A kind of broken coal petrography deep hole segmenting slip casting method of fully-mechanized mining working | |
| CN105114030A (en) | Gas extraction drilling non-solidification constant-pressure slurry hole sealing method | |
| CN202250166U (en) | Secondary high-pressure grouting hole packer | |
| CN103291354B (en) | Floor rock roadway layer-crossing pressure relief drilling filling and reinforcing method | |
| CN102704986A (en) | Pressure-controlled hole sealing method for gas drainage hole | |
| CN112727535A (en) | Liquid CO2Coal body cracking and permeability increasing method with cooperative drilling and water filling | |
| CN108868827A (en) | Km deep-well high-ground stress combination of steel rope injection hole sealing device and method for sealing | |
| CN207048813U (en) | Sealing and leakage plugging device for gas pumping | |
| CN102536158A (en) | Uphole sealing method | |
| CN205805503U (en) | Coal mine gas extraction drill hole band pressure grouting rapid hole packer | |
| CN205330611U (en) | Mining hole packer | |
| CN112127899B (en) | Method for consolidation grouting of conglomerate stratum tunnel arch ring | |
| CN112557279A (en) | Weathered bedrock hole-fracture vertical permeability testing device and method | |
| CN205743827U (en) | Mash gas extraction drilling cuttings backfills pouch slip casting type hole packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |