CN210152597U - Magnetic sealing device for near-horizontal gas extraction drill hole of coal seam - Google Patents
Magnetic sealing device for near-horizontal gas extraction drill hole of coal seam Download PDFInfo
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- CN210152597U CN210152597U CN201920822673.3U CN201920822673U CN210152597U CN 210152597 U CN210152597 U CN 210152597U CN 201920822673 U CN201920822673 U CN 201920822673U CN 210152597 U CN210152597 U CN 210152597U
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Abstract
The utility model discloses a magnetic sealing device for a near-horizontal gas extraction drill hole of a coal seam, which comprises a first plugging bag arranged at one end in the drill hole of the coal seam, a second plugging bag arranged at the other end in the drill hole of the coal seam, and an extraction pipe, a grouting pipe and a mud return pipe which are arranged in the drill hole of the coal seam; the space between the first plugging bag and the second plugging bag is a hole sealing section for injecting magnetic slurry, the extraction pipe sequentially penetrates through the first plugging bag, the hole sealing section and the second plugging bag, the grouting pipe and the slurry return pipe both penetrate through the first plugging bag and stretch into the hole sealing section, an installation rod is arranged in the extraction pipe, and one end of the installation rod stretching into the extraction pipe is connected with a magnetic pole consistent with the magnetism of the magnetic slurry. The utility model discloses simple structure, reasonable in design realizes conveniently and with low costs, can effectively use in the sealed of this nearly horizontal gas drainage drilling in coal seam, reduces energy loss, improves the hole sealing quality, and the hole sealing is effectual, convenient to popularize and use.
Description
Technical Field
The utility model belongs to the technical field of coal seam gas drainage, concretely relates to this nearly horizontal gas in coal seam takes out and adopts drilling magnetism sealing device.
Background
Coal mine gas is one of main disasters for coal mine safety production and is clean energy. In recent years, with the increase of mining depth, gas disasters become more and more main factors influencing the safety production of coal mines, gas extraction is a fundamental method for preventing and treating the gas disasters of mines, and the hole sealing quality of drill holes is a key factor of the extraction effect.
Because the coal and rock mass strength around the single high-gas low-permeability coal seam nearly-horizontal extraction drill hole is low (particularly in a soft coal seam), micro cracks often exist around the drill hole, and the sealing difficulty is increased due to crack expansion, crack extension and crack communication. At present, the sealing method mainly adopted internationally mainly comprises the following steps: the cement mortar hole sealing and the polyurethane hole sealing are easy to shrink after the cement mortar hole sealing and the polyurethane hole sealing, and the sealing effect is poor; the latter often cannot achieve an ideal sealing state due to insufficient sealing length, and the commonly used sealing material polyurethane has certain toxicity and high price, so that the sealing cost is high, and accurate and efficient sealing is difficult to realize.
In order to solve the sealing problem of the gas extraction drill hole, a brand new hole sealing method is urgently needed to be found, and the sealing requirement of the underground high-quality drill hole of the coal mine is met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a this nearly horizontal gas in coal seam takes out and adopts drilling magnetism sealing device, its simple structure, reasonable in design realizes conveniently and with low costs, can effectively use in this nearly horizontal gas in coal seam takes out and adopts the sealed of drilling, reduces energy loss, improves the hole sealing quality, and the hole sealing is effectual, convenient to popularize and use.
In order to solve the technical problem, the utility model discloses a technical scheme is: the magnetic sealing device for the coal seam near-horizontal gas extraction drill hole comprises a first plugging bag arranged at the hole opening of the coal seam drill hole, a second plugging bag arranged in the coal seam drill hole, an extraction pipe, a grouting pipe and a slurry return pipe which are arranged in the coal seam drill hole; the space between the first plugging bag and the second plugging bag is a hole sealing section, magnetic slurry is injected into the hole sealing section through a grouting pipe, the extraction pipe sequentially penetrates through the first plugging bag, the hole sealing section and the second plugging bag, the grouting pipe and the slurry return pipe both penetrate through the first plugging bag and extend into the hole sealing section, an installation rod is arranged in the extraction pipe, and one end, extending into the extraction pipe, of the installation rod is connected with a magnetic pole consistent with the magnetism of the magnetic slurry.
According to the magnetic sealing device for the near-horizontal gas extraction drill hole in the coal seam, the distance between the first plugging bag and the second plugging bag is 10-20 m.
According to the magnetic sealing device for the near-horizontal gas extraction drill hole in the coal seam, the diameter of the extraction pipe is 70-80 mm.
According to the magnetic sealing device for the near-horizontal gas extraction drill hole in the coal seam, the diameters of the grouting pipe and the slurry return pipe are both 5-15 mm.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses simple structure, reasonable in design realizes conveniently and with low costs.
2. The utility model discloses a repulsion force of magnetic pole to magnetic particle promotes the thick liquid further to coal seam drilling pore wall infiltration, has increased the sealed radiation radius and the sealed efficiency of sealing the hole section.
3. The utility model discloses a magnetism hole sealing magnetic force direct action is in the magnetic particle in the thick liquid, does not pass through the power conduction between the pressure from the grouting pump to the hole sealing section, has effectively reduced energy loss.
4. The utility model discloses an effect of magnetism repulsion, in hole sealing thick liquid solidification process, "crescent" shape gas leakage passageway that leads to because of the gravity reason can not appear, has effectively improved the hole sealing quality.
5. The utility model discloses can effectively use in this nearly horizontal gas in coal seam takes out and adopts the sealed of drilling, the hole sealing is effectual, convenient to popularize and use.
To sum up, the utility model discloses simple structure, reasonable in design realizes conveniently and with low costs, can effectively use in this near horizontal gas drainage drilling's in coal seam is sealed, reduces energy loss, improves the hole sealing quality, and the hole sealing is effectual, convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals:
1-a first occluding pouch; 2-second blocking the capsular bag; 3, pumping out a pipe;
4-grouting pipe; 5, a slurry return pipe; 6, mounting a rod;
7-magnetic pole; and 8, drilling hole walls.
Detailed Description
As shown in fig. 1, the magnetic sealing device for the coal seam near-horizontal gas extraction drill hole of the utility model comprises a first plugging bag 1 arranged at the coal seam drill hole and a second plugging bag 2 arranged in the coal seam drill hole, and an extraction pipe 3, a grouting pipe 4 and a mud return pipe 5 arranged in the coal seam drill hole; the space between the first plugging bag 1 and the second plugging bag 2 is a hole sealing section, magnetic slurry is injected into the hole sealing section through a grouting pipe 4, the extraction pipe 3 sequentially penetrates through the first plugging bag 1, the hole sealing section and the second plugging bag 2, the grouting pipe 4 and the slurry return pipe 5 both penetrate through the first plugging bag 1 and extend into the hole sealing section, an installation rod 6 is arranged in the extraction pipe 3, and one end, extending into the extraction pipe 3, of the installation rod 6 is connected with a magnetic pole 7 consistent with the magnetism of the magnetic slurry.
In specific implementation, the magnetic slurry is formed by organically combining magnetic particles and a high polymer mucilage material according to a ratio of 17:3, and 3% of an expanding agent (active metal aluminum ions), 0.08% of a stabilizing agent, 1.5% of a retarder (inorganic alkaline non-metal ions) and 1.5% of fly ash are added to fully and uniformly mix the magnetic particles and the sealing slurry; the poles 7 generate a repulsive force on the magnetic slurry, promoting further penetration of the slurry into the crevices in the borehole wall 8.
In this embodiment, the distance between the first plugging pouch 1 and the second plugging pouch 2 is 10m to 20 m.
In specific implementation, the distance between the first plugging bag 1 and the second plugging bag 2 is 16m, and the first plugging bag 1 and the second plugging bag 2 are respectively filled with concrete hole sealing materials to form plugs at two ends.
In the embodiment, the diameter of the extraction pipe 3 is 70 mm-80 mm.
In specific implementation, the diameter of the extraction pipe 3 is preferably 75 mm.
In this embodiment, the diameters of the grouting pipe 4 and the slurry return pipe 5 are both 5mm to 15 mm.
In specific implementation, the diameters of the grouting pipe 4 and the slurry return pipe 5 are both preferably 10 mm.
When the utility model is used, firstly, a first plugging bag 1 is placed at the orifice of the coal seam near-horizontal gas extraction drill hole, a second plugging bag 2 is placed in the coal seam near-horizontal gas extraction drill hole at a distance of 16m from the first plugging bag 1, and then an extraction pipe 3, a grouting pipe 4 and a grout return pipe 5 are laid in the drill hole; then, concrete materials are injected into the first plugging bag 1 and the second plugging bag 2 to form concrete plugs at two ends, after the concrete plugs are solidified, magnetic grout is injected into the hole sealing section through the grouting pipe 4, and under the action of grouting pressure, the grouting liquid gradually permeates into pores and cracks in the hole wall 8 of the drilled hole after the whole grouting space is filled with the grouting liquid; finally, a magnetic pole 7 with the same magnetism as the sealing slurry is sent into the extraction pipe 3 through the mounting rod 6 to generate repulsive force to magnetic particles in the magnetic slurry, so that the slurry is promoted to further permeate into gaps in the hole wall 8 of the drilled hole, and the sealing radiation radius and the sealing efficiency of the hole sealing section are increased.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (4)
1. The utility model provides a nearly horizontal gas drainage drilling magnetic seal device in this coal seam which characterized in that: the device comprises a first plugging bag (1) arranged at the mouth of a coal seam drilling hole, a second plugging bag (2) arranged in the coal seam drilling hole, and an extraction pipe (3), a grouting pipe (4) and a slurry return pipe (5) arranged in the coal seam drilling hole; the space between the first plugging bag (1) and the second plugging bag (2) is a hole sealing section, magnetic slurry is injected into the hole sealing section through a grouting pipe (4), the extraction pipe (3) sequentially penetrates through the first plugging bag (1), the hole sealing section and the second plugging bag (2), the grouting pipe (4) and the slurry return pipe (5) both penetrate through the first plugging bag (1) and stretch into the hole sealing section, an installation rod (6) is arranged in the extraction pipe (3), and one end, stretching into the extraction pipe (3), of the installation rod (6) is connected with a magnetic pole (7) consistent with the magnetism of the magnetic slurry.
2. The magnetic sealing device for the near-horizontal gas extraction drill hole in the coal seam according to claim 1 is characterized in that: the distance between the first plugging bag (1) and the second plugging bag (2) is 10-20 m.
3. The magnetic sealing device for the near-horizontal gas extraction drill hole in the coal seam according to claim 1 is characterized in that: the diameter of the extraction pipe (3) is 70-80 mm.
4. The magnetic sealing device for the near-horizontal gas extraction drill hole in the coal seam according to claim 1 is characterized in that: the diameters of the grouting pipe (4) and the slurry return pipe (5) are both 5-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822673.3U CN210152597U (en) | 2019-05-31 | 2019-05-31 | Magnetic sealing device for near-horizontal gas extraction drill hole of coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822673.3U CN210152597U (en) | 2019-05-31 | 2019-05-31 | Magnetic sealing device for near-horizontal gas extraction drill hole of coal seam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210152597U true CN210152597U (en) | 2020-03-17 |
Family
ID=69761540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920822673.3U Expired - Fee Related CN210152597U (en) | 2019-05-31 | 2019-05-31 | Magnetic sealing device for near-horizontal gas extraction drill hole of coal seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210152597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2019
- 2019-05-31 CN CN201920822673.3U patent/CN210152597U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200317 Termination date: 20210531 |
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| CF01 | Termination of patent right due to non-payment of annual fee |