CN101845944B - Method for sealing gas drainage boreholes at specified positions - Google Patents
Method for sealing gas drainage boreholes at specified positions Download PDFInfo
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- CN101845944B CN101845944B CN 201010174725 CN201010174725A CN101845944B CN 101845944 B CN101845944 B CN 101845944B CN 201010174725 CN201010174725 CN 201010174725 CN 201010174725 A CN201010174725 A CN 201010174725A CN 101845944 B CN101845944 B CN 101845944B
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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 accurately to control hole sealing depth and sealing of hole position, increase mash gas pumping drilling hole sealing depth, improve the gas pumping effect.
Background technology
Gas is one of colliery five the Nature disasters, and the safety of mine in serious threat.For the 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 impact that is subjected to the little grade of Permeability Coefficent in Coal Seam geological conditions, topmost reason is that the sealing quality of boring is poor, causes gas leakage serious, and gas extraction 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.Very short time due to chemical grout after mix and blend, (just begin reaction in 40～60s), when therefore adopting the circumvolution slurry method, hole sealing depth can only reach 4～5m, because the relaxation zone that can not effectively avoid the tunnel causes sealing quality relatively poor.When adopting pressure injection slurry method sealing of hole, although can increase hole sealing depth, but due to need to 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 occurs in boring or hole quality is poor, block plate or veil reduce or distortion place very likely is stuck in the boring cross section, thereby the gas pumping pipe can not be sent to the design attitude in boring, cause sealing of hole poor effect or failure.
Summary of the invention
The present invention seeks to for the weak point in prior art, a kind of hole sealing depth that can accurately control hole sealing depth and sealing of hole position, increase mash gas pumping drilling is provided, improves the method for the sealing gas drainage boreholes at specified positions of gas pumping effect.
The method of sealing gas drainage boreholes at specified positions of the present invention comprises drainage tube and Grouting Pipe, and concrete steps are as follows:
A, to form total length at the front portion of drainage tube suit by cotton cloth sleeve section and anlistatig canvas cloth sleeve capsule section be l
2Flexibility sleeve capsule, Grouting Pipe is inserted in flexible sleeve capsule, the two ends binding sealing of the capsule of then flexibility being tucked inside the sleeve is fixed on drainage tube;
B, drainage tube and the Grouting Pipe that will be fixed with flexible sleeve capsule are sent in 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 sleeve capsule of sealing, until be full of flexible sleeve capsule, sealing filling material is completed 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 anlistatig canvas 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) eliminated the macromolecule polymeric material reaction speed soon on the impact of hole-sealing technology, enlarged markedly the hole sealing depth of mash gas pumping drilling, the while is control sealing of hole position accurately, makes the sealing of hole section effectively avoid the relaxation zone in tunnel, has 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 the bonding tightness degree of flexible sleeve capsule and macromolecule polymeric material and boring, strengthened again the compactness of macromolecule polymeric material;
(3) eliminate the factors such as the mash gas pumping drilling hole quality is poor to inserting the impact of drainage tube, can realize inserting smoothly drainage tube.
(4) can increase hole sealing depth, raising sealing quality, sealing of hole is effective, and mash gas extraction concentration is high, can extend approximately 1～2 month effective extraction phase, and its method is simple, and is easy to operate, rapid.
Description of drawings
Fig. 1 is that the present invention is to the schematic diagram of up hole sealing of hole;
Fig. 2 is that the present invention is to the schematic diagram of descending hole sealing of hole.
In figure: mash gas pumping drilling 1, drainage tube 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 front portion suit of the drainage tube 2 in prepare inserting gas pumping hole 1 forms total length l by cotton cloth sleeve section 5-2 and the anlistatig canvas cloth capsule section 5-1 that tucks inside the sleeve
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 anlistatig canvas 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 is combined with the extraction hole wall; The length of anlistatig canvas cloth sleeve capsule section 5-1 is 0.3～1m, to guarantee that slurries do not leak outside.Grouting Pipe 3 is inserted in flexible sleeve capsule 5, and the two ends binding sealing of the capsule 5 of then flexibility being tucked inside the sleeve is fixed on drainage tube 2; Tying up should be firm, radially expand to guarantee sealing filling material 4 to be subject 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, drainage tube 2 and the Grouting Pipe 3 that first will be fixed with flexible sleeve capsule 5 are 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 guarantee the sealing of hole section, to improve sealing quality and to extend effective extraction time.By grouting pump slip casting, under grouting pump transported pressure-acting, sealing filling material 4 was by the flexibility sleeve capsule 5 interior injection of Grouting Pipe 3 to sealing, until be full of flexible sleeve capsule 5 at last.Sealing filling material 4 adopts the macromolecule polymeric material of polyurethanes.The macromolecule polymeric material that enters the polyurethanes in flexible sleeve capsule 5 first flows into the anlistatig canvas cloth sleeve capsule section 5-1 of lower in flow process, gather gradually again to cotton cloth sleeve section 5-2, at this moment a small amount of sealing filling material 4 penetrates 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 namely complete sealing of hole.
Embodiment two, shown in Figure 2, method for sealing downward hole: opposite with the angle direction of up closed hole because the angle direction of closed hole is downward, be sleeved on the total length l that is consisted of by cotton cloth sleeve section 5-2 and anlistatig canvas cloth sleeve capsule section 5-1 of drainage tube 2 front portions
2The flexibility sleeve capsule 5 that is 2～4m is also opposite, and namely cotton cloth sleeve section 5-2 is outside, and anlistatig canvas cloth sleeve capsule section 5-1 section is inside, and other is all identical with embodiment one, and same section slightly.
Claims (1)
1. the method for a sealing gas drainage boreholes at specified positions, comprise drainage tube (2) and Grouting Pipe (3), it is characterized in that:
A, tucked inside the sleeve by cotton cloth sleeve section (5-2) and anlistatig canvas cloth at the front portion of drainage tube (2) suit that to form total length be l to capsule section (5-1)
2Flexibility sleeve capsule (5), Grouting Pipe (3) is inserted in flexible sleeve capsule (5), the binding sealing of the two ends of the capsule (5) of then flexibility being tucked inside the sleeve is fixed on drainage tube (2), the total length l of described flexible sleeve capsule (5)
2Greater than 2m, wherein the length of anlistatig canvas cloth sleeve capsule section (5-1) is 0.3～1m; The diameter of flexible sleeve capsule (5) is greater than the diameter of mash gas pumping drilling (1); The pore size of described cotton cloth sleeve section (5-2) is 0.3～2mm;
B, drainage tube (2) and the Grouting Pipe (3) that will be fixed with flexible sleeve capsule (5) are sent in mash gas pumping drilling (1), make the outer end of flexible sleeve capsule (5) and the orifice distance l1 of mash gas pumping drilling (1) be not less than 8m;
C, inject sealing filling material (4) by Grouting Pipe (3) in the flexibility sleeve capsule (5) of sealing, until be full of flexible sleeve capsule (5), sealing filling material (4) is completed sealing of hole after expanding; 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 |
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| Publication Number | Publication Date |
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| CN101845944A CN101845944A (en) | 2010-09-29 |
| CN101845944B true CN101845944B (en) | 2013-06-05 |
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| CN 201010174725 Active CN101845944B (en) | 2010-05-08 | 2010-05-08 | Method for sealing gas drainage boreholes at specified positions |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966371B (en) * | 2011-09-01 | 2015-05-20 | 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 |
| CN102561992B (en) * | 2012-01-29 | 2013-11-06 | 山东大学 | Grouting plugging process adopting deformation water stopper |
| 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 |
| CN102979478B (en) * | 2012-12-05 | 2013-11-06 | 山东大学 | Water stopping device for water inrush borehole drilling |
| 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 |
| 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 |
| CN103410469B (en) * | 2013-07-08 | 2015-09-16 | 孔维一 | Jet printing type gas pumping hole-sealing technology |
| 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 |
| CN106677741B (en) * | 2017-01-06 | 2019-05-07 | 山东科技大学 | A kind of mash gas pumping drilling fixed point encapsulating 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 |
| 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 |
Citations (6)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482026B (en) * | 2009-02-10 | 2011-01-19 | 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 (6)
| 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 |
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| CN101845944A (en) | 2010-09-29 |
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