CN108150127B - Hole sealing device and hole sealing method for mine gas extraction drilling - Google Patents
Hole sealing device and hole sealing method for mine gas extraction drilling Download PDFInfo
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- CN108150127B CN108150127B CN201810147652.6A CN201810147652A CN108150127B CN 108150127 B CN108150127 B CN 108150127B CN 201810147652 A CN201810147652 A CN 201810147652A CN 108150127 B CN108150127 B CN 108150127B
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- 238000007789 sealing Methods 0.000 title claims abstract description 124
- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000605 extraction Methods 0.000 title claims description 90
- 238000005452 bending Methods 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims description 19
- 230000000903 blocking effect Effects 0.000 claims description 10
- 239000003245 coal Substances 0.000 abstract description 15
- 239000004744 fabric Substances 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract 6
- 239000007789 gas Substances 0.000 description 80
- 230000009471 action Effects 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The utility model provides a mine gas drainage drilling hole sealing device and hole sealing method, including the gas drainage pipe, first, two pairs of sealers all include a plurality of spring brackets and the outside thick liquid cloth that blocks up of cover spring bracket along gas drainage pipe outer wall circumference evenly distributed, the spring bracket comprises straight-bar section and section of bending, section of bending one end and straight-bar section are as an integer, the other end is connected with the arc piece, thereby be in the same place around a plurality of spring bracket circles, form straight section of thick liquid section and cone section of thick liquid section, the one end of thick liquid cloth is connected with the big mouth end of cone section, the other end is connected with straight section of thick liquid section, the big mouth end of cone section of thick liquid section is relative with the big mouth end of cone section of second pair of sealers in the first pair of sealers, be equipped with feeding grouting pipe and blast pipe on the first pair of sealers. When the plugging device is used for plugging, the plugging grouting work is simplified, the hole sealing length can be adjusted at will, and the process of inserting the feeding grouting pipe is omitted, so that the problem that the feeding grouting pipe is blocked by coal gangue is avoided, the operation is simple and convenient, the plugging effect is good, the efficiency is high, and the cost is low.
Description
Technical Field
The invention relates to the technical field of gas extraction in coal mine exploitation, in particular to a hole sealing device and a hole sealing method for mine gas extraction holes.
Background
Mine gas is a generic term for various harmful gases mainly including methane which are flushed from coal and rock in the production process of coal mines, and is a main natural factor which seriously threatens the safety production of the coal mines. Casualties and property loss caused by gas disasters are huge, so that prevention of the gas disasters has important significance for the health and sustainable development of the coal industry. At present, gas extraction is an important means for controlling gas in mine operation, and in the gas extraction process, the tight sealing of a drilling hole is required to be ensured, and the gas extraction device has a longer sealing length so as to ensure the gas extraction effect. However, the coal mine in China at the present stage mainly comprises goaf gas drainage, coal seam gas drainage and the like, and the problems in the gas drainage process, namely the hole sealing length of a gas drainage drill hole and the hole sealing problem are not solved well all the time.
The hole packer is a device commonly used in underground gas extraction of coal mines, and is of various types, and a bag-type hole packer is commonly used, wherein two elastic hole sealing capsules are sequentially inflated by grouting pressure and then grouting and plugging are carried out, so that a plugging section is formed between the two elastic hole sealing capsules. The hole sealing device has the following defects in the practical application process: 1. the operation is time-consuming and labor-consuming, the use cost is high, and the efficiency is low; 2. when being inserted into a feeding grouting pipe (also called a grouting pipe), the grouting pipe is easy to be blocked by coal gangue, so that the lower feeding grouting pipe is difficult; 3. the hole sealing length can not be adjusted, and the requirement of coal mine gas control is difficult to be met after hole sealing.
Disclosure of Invention
The invention aims to solve the technical problems of providing the mine gas extraction drilling hole sealing device and the hole sealing method, wherein the hole sealing length can be adjusted at will, the plugging grouting flow is effectively simplified, the process of inserting a feeding grouting pipe is omitted, the problem that the feeding grouting pipe is blocked by coal gangue is avoided, the operation is simple and convenient, and the plugging effect is good.
The technical scheme is that the mine gas extraction drilling hole sealing device comprises a gas extraction pipe used for being inserted into a gas extraction drilling hole, and further comprises a first sealing device and a second sealing device, wherein the first sealing device and the second sealing device comprise a plurality of spring frames uniformly distributed along the circumference of the outer wall of the gas extraction pipe and slurry blocking cloth sleeved outside the spring frames, each spring frame consists of a straight rod section and a bending section, one end of the bending section is integrated with the straight rod section, the other end of the bending section is connected with an arc-shaped piece, so that after the circumference of the spring frames are integrated together, a straight cylinder section and a cone cylinder section are formed, a positioning ring is connected to the straight cylinder section, one end of the slurry blocking cloth is connected with the large opening end of the cone cylinder section, the other end of the straight cylinder section is connected with the gas extraction pipe in a sealing mode, the large opening end of the cone cylinder section in the first sealing device is opposite to the large opening end of the cone cylinder section in the second sealing device, and when the gas extraction pipe is inserted into the first sealing device and the drilling hole, and the gas extraction pipe are both sealed and the first sealing device are arranged in the drilling hole.
The invention relates to a mine gas extraction drilling hole sealing device, wherein arc-shaped spring pieces are arranged between the inner wall of each bending section and the outer wall of a gas extraction pipe, and the open ends of the arc-shaped spring pieces are connected with the bending sections.
The invention also provides a hole sealing method of the mine gas extraction drilling hole sealing device, which comprises the following steps:
1) The first sealing device and the second sealing device are respectively sleeved on the two gas extraction pipes, and the clamping hoop is screwed to respectively seal and fix the two gas extraction pipes, so that the large opening end of the conical section in the first sealing device is ensured to be opposite to the large opening end of the conical section in the second sealing device;
2) According to the hole sealing length, firstly inserting a gas extraction pipe provided with a second sealing device into a gas extraction drill hole, and then adjusting the distance between the second sealing device and the first sealing device in a mode of connecting a plurality of middle gas extraction pipes in series at the rear part of the gas extraction pipe;
3) After the distance between the first sealing device and the second sealing device is determined, ensuring that the first sealing device is positioned at the orifice of the gas extraction drill hole;
4) Pressurizing and injecting slurry into a sealed cavity enclosed by the inner walls of the first sealing device, the second sealing device and the gas extraction drill hole along the feeding grouting pipe by means of a grouting pump;
5) Continuously injecting the slurry, and stopping grouting when the slurry overflows from the exhaust pipe;
6) Standing for 2-6 hours to realize sealing of the gas extraction drilling hole.
Compared with the prior art, the mine gas extraction drilling hole sealing device and the hole sealing method have the following advantages:
1. the first sealing device and the second sealing device are respectively sleeved on the two gas extraction pipes, then the gas extraction pipe provided with the second sealing device is inserted into a gas extraction drill hole according to the hole sealing length, the distance between the second sealing device and the first sealing device is adjusted in a mode that a plurality of middle gas extraction pipes are connected in series behind the gas extraction pipe, and finally the first sealing device is connected to the middle gas extraction pipe at the tail part. By the operation mode, the invention realizes random adjustment of the hole sealing length and meets the requirement of coal mine gas control.
2. After the gas extraction pipe and the first and second sealing devices reach preset positions, grouting is started, and the feeding grouting pipe and the exhaust pipe are arranged on the first sealing device in advance, so that the invention effectively simplifies the plugging grouting process, omits the process of inserting the feeding grouting pipe, and has no problem that the feeding grouting pipe is blocked by coal gangue, and is very convenient to operate.
3. Because the first pair of sealing devices and the second pair of sealing devices in the invention both comprise a plurality of spring frames uniformly distributed along the circumference of the outer wall of the gas extraction pipe and slurry blocking cloth sleeved outside the spring frames, each spring frame consists of a straight rod section and a bending section, one end of the bending section is integrated with the straight rod section, and the other end of the bending section is connected with an arc piece, thus after the plurality of spring frame circles are together, a straight cylinder section and a cone cylinder section are formed, when the gas extraction pipe drives the first pair of sealing devices and the second pair of sealing devices to be inserted into a gas extraction drilling hole, the large opening end of the cone cylinder section can be outwards tensioned under the action of elastic force, so that a sealed cavity is enclosed together with the inner wall of the gas extraction drilling hole, and further, the ideal blocking effect can be achieved in the grouting process and after grouting.
4. When the large opening ends of the two cone sections are outwards tensioned and form a sealed cavity together with the inner wall of the gas extraction drilling hole, under the action of grouting force, grout permeates into the inner wall of the gas extraction drilling hole and fills the cracks of the peripheral wall of the gas extraction drilling hole, so that the ideal plugging effect of the gas extraction drilling hole is realized.
Drawings
FIG. 1 is a schematic diagram of a longitudinal sectional structure of a mine gas extraction drilling hole sealing device in grouting;
fig. 2 is a schematic view of a three-dimensional enlarged structure of the first pair of sealers in fig. 1 when the plugging cloth, the feed grouting pipe and the exhaust pipe are hidden.
Detailed Description
The hole sealing device and the hole sealing method for mine gas extraction holes are further described in detail below with reference to the accompanying drawings and the detailed description:
as shown in fig. 1 and 2, in this embodiment, the hole sealing device for mine gas extraction drill hole of the present invention includes a gas extraction pipe 12 for being inserted into a gas extraction drill hole 10, and further includes a first pair of sealers 4 and a second pair of sealers 3, wherein each of the first pair of sealers 4 and the second pair of sealers 3 includes a plurality of spring frames 4-2, 3-2 uniformly distributed along the circumference of the outer wall of the gas extraction pipe 12, and slurry blocking cloths 4-3, 3-3 sleeved outside the spring frames 4-2, 3-2. Each spring frame 4-2, 3-2 is composed of a straight rod section 4-21, 3-21 and a bending section 4-22, 3-22, one end of the bending section 4-22, 3-22 is integrated with the straight rod section 4-21, 3-21, the other end is connected with an arc-shaped sheet 4-6, 3-6, thus forming a straight cylinder section and a cone cylinder section after a plurality of spring frames 4-2, 3-2 are round together. The straight section is connected with positioning rings 4-4 and 3-4, one end of the slurry blocking cloth 4-3 and 3-3 is connected with the large opening end of the cone section, more specifically, the end parts of the slurry blocking cloth 4-3 and 3-3 are inwards folded and wrapped on the arc-shaped sheets 4-6 and 3-6 and are sewn and fixed, the other end of the slurry blocking cloth 4-3 and 3-3 is connected with the straight section through a clamp 4-1 and 3-1, and the clamp 4-1 and 3-1 are commercial products. The straight section is in sealing connection with the gas extraction pipe 12 through the clamps 4-1 and 3-1, the large opening end of the conical section in the first sealing device 4 is opposite to the large opening end of the conical section in the second sealing device 3, when the gas extraction pipe 12 drives the first sealing device 4 and the second sealing device 3 to be inserted into the gas extraction drilling 10, the first sealing device 4 is positioned at the opening of the gas extraction drilling 10, the second sealing device 3 is positioned at the preset depth (the distance can be adjusted according to actual requirements) of the gas extraction drilling 10, and the distance between the second sealing device 3 and the first sealing device 4 can be more than 20m (generally 10-20 m). The first sealing device 4 is provided with a feeding grouting pipe 13 and an exhaust pipe 14, and the feeding grouting pipe 13 and the exhaust pipe 14 are communicated with a sealing cavity 11 enclosed by the inner walls of the first sealing device 4, the second sealing device 3 and the gas extraction drilling 10.
Arc-shaped spring pieces 4-5 and 3-5 are arranged between the inner walls of the bending sections 4-22 and 3-22 and the outer wall of the gas extraction pipe 12, the open ends of the arc-shaped spring pieces 4-5 and 3-5 are connected with the bending sections 4-22 and 3-22, and the tensioning effect of the large opening ends of the cone sections can be further improved due to the arrangement of the arc-shaped spring pieces 4-5 and 3-5, so that sealing reliability is better ensured.
When the invention is inserted into gas extraction drilling holes 10 (also called gas extraction drilling holes) with different diameters, the large opening end of the cone section can be correspondingly contracted or expanded, so that the universality is greatly improved.
The invention discloses a hole sealing method of a mine gas extraction drilling hole sealing device, which comprises the following steps:
1) The first sealing device 4 and the second sealing device 3 are respectively sleeved on the two gas extraction pipes 12, and the clamping bands 4-1 and 3-1 are respectively screwed to seal and fix the two gas extraction pipes, so that the large opening end of the conical section in the first sealing device 4 is ensured to be opposite to the large opening end of the conical section in the second sealing device 3;
2) According to the hole sealing length, firstly inserting a gas extraction pipe provided with a second pair of sealers 3 into a gas extraction drilling hole 10, and then adjusting the distance between the second pair of sealers 3 and the first pair of sealers 4 in a mode of connecting a plurality of middle gas extraction pipes in series at the rear part of the gas extraction pipe, wherein the distance is the hole sealing length;
3) After the distance between the first sealing device 4 and the second sealing device 3 is determined, ensuring that the first sealing device 4 is positioned at the orifice of the gas extraction drilling hole 10;
4) The slurry is pressurized and injected into a sealed cavity 11 enclosed by the inner walls of the first pair of sealers 4, the second pair of sealers 3 and the gas extraction drilling hole 10 along the feeding grouting pipe 13 by means of a grouting pump, when the grouting pressure reaches more than 2Mpa, the grouting cloth 4-3 and 3-3 start to expand (see the state shown in figure 1), thereby playing a role of sealing and grouting;
5) Continuously injecting the slurry, and stopping grouting when the slurry overflows from the exhaust pipe 14, namely, the sealing cavity 11 is filled with the slurry;
6) Standing for 2-6 hours, solidifying the slurry, and sealing the gas extraction drilling 10.
The invention is generally used for plugging the extraction drilling hole with the depth of more than 100m, simplifies the plugging grouting work during plugging, can randomly adjust the hole sealing length, omits the process of inserting the feeding grouting pipe, and has the advantages of no blocking problem of the feeding grouting pipe by coal gangue, simple and convenient operation and good plugging effect. In addition, the invention has novel and unique structure, convenient and safe use, high working efficiency, low cost and low labor intensity.
The above examples are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the protection scope of the present invention without departing from the design spirit of the present invention.
Claims (2)
1. The utility model provides a mine gas drainage drilling hole sealing device drainage drilling hole sealing method, includes gas drainage pipe (12) that are used for inserting in gas drainage drilling hole (10), its characterized in that: the mine gas extraction drilling hole sealing device also comprises a first pair of sealers (4) and a second pair of sealers (3), wherein the first pair of sealers (4) and the second pair of sealers (3) respectively comprise a plurality of spring frames (4-2, 3-2) uniformly distributed along the circumference of the outer wall of a gas extraction pipe (12) and slurry blocking cloths (4-3, 3-3) sleeved outside the spring frames (4-2, 3-2), each spring frame (4-2, 3-2) consists of a straight rod section (4-21, 3-21) and a bending section (4-22, 3-22), one end of each bending section (4-22, 3-22) is integrated with the straight rod section (4-21, 3-21), the other end of each bending section is connected with an arc-shaped sheet (4-6, 3-6), thereby forming a straight cylinder section and a cone section after the circumference of the spring frames (4-2, 3-2) is round, a positioning ring (4-4, 3-2) is connected onto the straight cylinder section, one end of the straight cylinder section is connected with the large cone section (4-3), one end of the straight cylinder section (4-3-2) is connected with the large end of the straight cylinder section (3) through the large end of the straight cylinder section (4-3), the large end of the straight cylinder section is connected with the large end of the straight cylinder section (3) and the large end of the straight cylinder section (1), after the gas extraction pipe (12) drives the first sealing device (4) and the second sealing device (3) to be inserted into the gas extraction drilling hole (10), the first sealing device (4) is positioned at the orifice of the gas extraction drilling hole (10), the first sealing device (4) is provided with a feeding grouting pipe (13) and an exhaust pipe (14), and the feeding grouting pipe (13) and the exhaust pipe (14) are communicated with a sealing cavity (11) formed by the first sealing device (4), the second sealing device (3) and the inner wall of the gas extraction drilling hole (10);
the extraction drilling hole sealing method comprises the following steps:
1) respectively sleeving a first sealing device (4) and a second sealing device (3) on two gas extraction pipes (12), and screwing up clamps (4-1, 3-1) to respectively seal and fix the two gas extraction pipes, so as to ensure that the large opening end of the middle cone section of the first sealing device (4) is opposite to the large opening end of the middle cone section of the second sealing device (3);
2) According to the hole sealing length, firstly inserting a gas extraction pipe provided with a second sealing device (3) into a gas extraction drilling hole (10), and then adjusting the distance between the second sealing device (3) and the first sealing device (4) in a mode of connecting a plurality of middle gas extraction pipes in series at the rear part of the gas extraction pipe;
3) After the distance between the first sealing device (4) and the second sealing device (3) is determined, ensuring that the first sealing device (4) is positioned at the orifice of the gas extraction drilling hole (10);
4) Pressurizing and injecting slurry into a sealed cavity (11) surrounded by the first sealing device (4), the second sealing device (3) and the inner wall of the gas extraction drilling hole (10) along a feeding grouting pipe (13) by means of a grouting pump;
5) Continuously injecting the slurry, and stopping grouting when the slurry overflows from the exhaust pipe (14);
6) Standing for 2-6 hours to realize the sealing of the gas extraction drilling hole (10).
2. The mine gas extraction borehole sealing method of the mine gas extraction borehole sealing device, according to claim 1, characterized in that: arc-shaped spring pieces (4-5, 3-5) are arranged between the inner walls of the bending sections (4-22, 3-22) and the outer wall of the gas extraction pipe (12), and the open ends of the arc-shaped spring pieces (4-5, 3-5) are connected with the bending sections (4-22, 3-22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147652.6A CN108150127B (en) | 2018-02-13 | 2018-02-13 | Hole sealing device and hole sealing method for mine gas extraction drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147652.6A CN108150127B (en) | 2018-02-13 | 2018-02-13 | Hole sealing device and hole sealing method for mine gas extraction drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108150127A CN108150127A (en) | 2018-06-12 |
| CN108150127B true CN108150127B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810147652.6A Active CN108150127B (en) | 2018-02-13 | 2018-02-13 | Hole sealing device and hole sealing method for mine gas extraction drilling |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578058B (en) * | 2018-12-10 | 2021-05-14 | 中国矿业大学 | Method for improving gas extraction concentration of extraction borehole through auxiliary drilling |
| CN109538123A (en) * | 2019-01-28 | 2019-03-29 | 重庆广创工贸有限责任公司 | A kind of positioning aperture guard device, guard aperture method and guard aperture tool |
| CN111550281B (en) * | 2020-05-11 | 2021-07-16 | 平顶山天安煤业股份有限公司 | Drilling and hole sealing structure for coal mine gas drainage |
| CN114704229B (en) * | 2022-04-11 | 2023-10-03 | 山西煤炭运销集团长治有限公司 | Sealing and leakage plugging equipment for gas extraction |
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| Publication number | Publication date |
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| CN108150127A (en) | 2018-06-12 |
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