CN113323643A - Low-permeability coal body sustainable ultrasonic permeability increasing equipment and process - Google Patents
Low-permeability coal body sustainable ultrasonic permeability increasing equipment and process Download PDFInfo
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- CN113323643A CN113323643A CN202110636719.4A CN202110636719A CN113323643A CN 113323643 A CN113323643 A CN 113323643A CN 202110636719 A CN202110636719 A CN 202110636719A CN 113323643 A CN113323643 A CN 113323643A
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- 239000003245 coal Substances 0.000 title claims abstract description 34
- 230000035699 permeability Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 239000011440 grout Substances 0.000 claims description 10
- 239000003566 sealing material Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 5
- 239000003034 coal gas Substances 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Images
Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/003—Vibrating earth formations
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses sustainable ultrasonic permeability-increasing equipment and technology for a low-permeability coal body, wherein the permeability-increasing equipment comprises an ultrasonic permeability-increasing mechanism, the ultrasonic permeability-increasing mechanism comprises an ultrasonic generator, an ultrasonic transducer, an ultrasonic lead-out rod and a circuit switch, the ultrasonic generator, the ultrasonic transducer, the ultrasonic lead-out rod and the circuit switch are connected through conducting wires to form a series circuit, and the permeability-increasing technology comprises the steps of drilling, placing a pipeline, sealing and grouting, increasing the permeability of the coal body and repeatedly pumping and extracting the coal body. The invention generates ultrasonic waves in the medium through the ultrasonic generator, the ultrasonic transducer and the ultrasonic wave guide rod, utilizes the ultrasonic waves to enable the coal body to generate resonance, generates a permeability-increasing measure of cracks, and can furthest pump out the coal gas through the processes of repeated water injection, repeated vibration and repeated permeability-increasing pumping, thereby realizing the standard extraction.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to sustainable ultrasonic permeability increasing equipment and technology for low-permeability coal.
Background
High gas, coal and gas outburst coal mines usually need to be pumped and discharged to solve the gas problem, but for coal bodies with undeveloped cracks and poor air permeability, gas is often difficult to be pumped and discharged effectively, the pumping and discharging effect is poor, and permeability-increasing measures need to be taken for the coal bodies.
In order to solve the problem of gas drainage, the conventional anti-reflection technical measures mainly comprise technologies such as hydraulic punching, hydraulic pressure, hydraulic slotting and the like. However, these measures are mainly one-time measures, and are affected by coal displacement, pressure change and other reasons after the measures are implemented, and coal fractures are easy to close again, so that the drainage effect is reduced.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides sustainable ultrasonic permeability-increasing equipment and technology for low-permeability coal bodies.
The invention provides sustainable ultrasonic permeability-increasing equipment for low-permeability coal, which comprises an ultrasonic permeability-increasing mechanism, wherein the ultrasonic permeability-increasing mechanism comprises an ultrasonic generator, an ultrasonic transducer, an ultrasonic leading-out rod and a circuit switch, and the ultrasonic generator, the ultrasonic transducer, the ultrasonic leading-out rod and the circuit switch are connected through leads and form a series circuit.
The invention also provides a sustainable ultrasonic permeability-increasing process for the low-permeability coal body, which comprises the following steps:
s1: drilling holes, namely placing pipelines, drilling holes according to the requirement of the construction aperture, washing drill cuttings in the drilled holes by using a water injection pipe, and sequentially placing a drain pipe, an ultrasonic wave guide rod, the water injection pipe and a gas drainage pipe;
s2: sealing holes and grouting, namely placing a sealing hole expansion ring, a grouting pipe and a slurry return pipe, placing the sealing hole expansion ring, injecting sealing hole slurry through the grouting pipe, and stopping grouting when the slurry return pipe returns;
s3: coal permeability increasing, after the hole sealing material is solidified, opening a water injection pipe valve to inject water into the image drilling hole, closing the water injection pipe valve to stop injecting water after the hole sealing material is filled, opening a circuit switch to increase the permeability of the coal around the drilling hole, opening a drain pipe valve to drain water after the permeability increasing is finished, closing the drain pipe valve after the water is drained completely, and opening a gas drainage pipe valve to drain gas;
s4: and (4) repeatedly extracting, after the gas drainage concentration is observed to be reduced to an empirical value, closing a valve of the gas drainage pipe, stopping drainage, repeatedly injecting water into the drill hole, opening the ultrasonic generator for permeability increase and draining, and performing drainage again.
Preferably, the drain pipe is located the drilling lower part, and the drain pipe mouth of pipe is located hole sealing position foremost, and ultrasonic wave guide rod installs in the drilling middle part, and the water injection pipe is installed and is located the drilling bottommost in the mouth of pipe, and gas drainage pipe installs in drilling uppermost, and gas drainage pipe mouth of pipe is located the drilling middle part.
Preferably, the pipe orifice of the grouting pipe is close to the hole sealing expansion ring, the slurry return pipe is positioned at the upper part of the drill hole, and the pipe orifice of the slurry return pipe is close to the hole sealing expansion ring.
The invention has the beneficial effects that:
the invention generates ultrasonic waves in the medium through the ultrasonic generator, the ultrasonic transducer and the ultrasonic wave guide rod, utilizes the ultrasonic waves to enable the coal body to generate resonance, generates a permeability-increasing measure of cracks, and can furthest pump out the coal gas through the processes of repeated water injection, repeated vibration and repeated permeability-increasing pumping, thereby realizing the standard extraction.
Drawings
FIG. 1 is a schematic diagram of a water and gas drainage structure of a sustainable ultrasonic permeability-increasing device for low-permeability coal according to the present invention;
FIG. 2 is a schematic diagram of a grouting hole sealing structure of a sustainable ultrasonic permeability-increasing process for low-permeability coal provided by the invention;
fig. 3 is a schematic view of an installation structure of the sustainable ultrasonic permeability-increasing device for the low-permeability coal body provided by the invention.
In the figure: the device comprises a coal body 1, a gas drainage pipe 2, a gas drainage pipe valve 3, a hole sealing expansion ring 4, a water injection pipe 5, a water injection pipe valve 6, a hole sealing expansion ring 7, a grouting hole sealing material 8, an ultrasonic wave guide rod 9, a water discharge pipe 10, a water discharge pipe valve 11, a grout return pipe 12, a grouting pipe 13, an ultrasonic wave generator 14, a circuit switch 15 and an ultrasonic wave transducer 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
A process of low-permeability coal sustainable ultrasonic permeability-increasing equipment comprises the following steps:
the method comprises the following steps that a pipeline is placed in a first drilled hole, the drilled hole 1 is drilled according to the requirement of the construction aperture, a water injection pipe is used for washing drill cuttings in the drilled hole 1, and a water discharge pipe 10, an ultrasonic leading-out rod 9, a water injection pipe 5 and a gas drainage pipe 2 are sequentially placed in the drilled hole 1, wherein the water discharge pipe 10 is located at the lower portion of the drilled hole 1, the pipe orifice of the water discharge pipe 10 is located at the foremost end of a hole sealing position, the ultrasonic leading-out rod 9 is installed in the middle of the drilled hole 1, the water injection pipe 5 is installed at the bottommost of the drilled hole 1, the gas drainage pipe 2 is installed at the uppermost portion of the drilled hole 1, and the pipe orifice of the gas drainage pipe 2 is located at the middle of the drilled hole 1;
secondly, hole sealing and grouting, namely placing a hole sealing expansion ring 4, a grouting pipe 13 and a grout return pipe 12, placing a hole sealing expansion ring 7, injecting hole sealing slurry through the grouting pipe, and stopping grouting when the grout return pipe is grouted, wherein the pipe orifice of the grouting pipe 13 is close to the hole sealing expansion ring 4, the grout return pipe 12 is positioned at the upper part of the drill hole 1, and the pipe orifice of the grout return pipe 12 is close to the hole sealing expansion ring 7;
thirdly, increasing the permeability of the coal body, opening a water injection pipe valve 6 to inject water into the image drill hole 1 after the hole sealing material is solidified, closing the water injection pipe valve 6 to stop injecting water after the hole sealing material is filled, opening a circuit switch 15 to increase the permeability of the coal body around the drill hole 1, opening a drain pipe valve 11 to discharge water after the permeability is increased, closing the drain pipe valve 11 after the water is discharged completely, and opening a gas drainage pipe valve 3 to drain the gas;
and fourthly, repeatedly extracting, namely closing the valve 3 of the gas drainage pipe after the gas drainage concentration is observed to be reduced to an empirical value, stopping drainage, repeatedly injecting water into the drill hole 1, opening the ultrasonic generator 14 for permeability increase and draining, and pumping again.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The sustainable ultrasonic permeability-increasing equipment for the low-permeability coal body comprises an ultrasonic permeability-increasing mechanism and is characterized in that the ultrasonic permeability-increasing mechanism comprises an ultrasonic generator (14), an ultrasonic transducer (16), an ultrasonic lead-out rod (9) and a circuit switch (15), wherein the ultrasonic generator (14), the ultrasonic transducer (16), the ultrasonic lead-out rod (9) and the circuit switch (15) are connected through conducting wires to form a series circuit.
2. The sustainable ultrasonic permeability increasing process for the coal body with low air permeability as claimed in claim 1, characterized by comprising the following steps:
s1: the method comprises the following steps of drilling holes, placing pipelines, drilling holes (1) according to the requirements of construction aperture, washing drill cuttings in the drilled holes (1) by using a water injection pipe, and sequentially placing a drain pipe (10), an ultrasonic wave guide rod (9), a water injection pipe (5) and a gas drainage pipe (2);
s2: hole sealing and grouting, namely placing a hole sealing expansion ring (4), a grouting pipe (13) and a grout return pipe (12), placing a hole sealing expansion ring (7), injecting hole sealing slurry through the grouting pipe, and stopping grouting when the grout return pipe is subjected to grout return;
s3: coal permeability increasing, after hole sealing materials are solidified, a water injection pipe valve (6) is opened to inject water into the image drilling hole (1), after the hole sealing materials are filled with the water, the water injection pipe valve (6) is closed to stop the water injection, a circuit switch (15) is opened to increase the permeability of the coal around the drilling hole (1), after the permeability increasing is finished, a water drainage pipe valve (11) is opened to drain water, after the water is drained completely, the water drainage pipe valve (11) is closed, and a gas drainage pipe valve (3) is opened to drain gas;
s4: and (4) repeatedly extracting, after the gas drainage concentration is observed to be reduced to an empirical value, closing the gas drainage pipe valve (3), stopping drainage, repeatedly injecting water into the drill hole (1), opening the ultrasonic generator (14) for permeability increase and water drainage, and performing drainage again.
3. The sustainable ultrasonic permeability improvement process for the coal body with low air permeability according to claim 2, wherein the drain pipe (10) is located at the lower part of the borehole (1), the orifice of the drain pipe (10) is located at the foremost end of the hole sealing position, the ultrasonic wave leading-out rod (9) is installed in the middle of the borehole (1), the water injection pipe (5) is installed at the orifice located at the bottommost part of the borehole (1), the gas drainage pipe (2) is installed at the uppermost part of the borehole (1), and the orifice of the gas drainage pipe (2) is located in the middle of the borehole (1).
4. The sustainable ultrasonic permeability increasing process for the coal body with low air permeability as claimed in claim 2, wherein the orifice of the grouting pipe (13) is close to the hole sealing expansion ring (4), the grout returning pipe (12) is located at the upper part of the drill hole (1), and the orifice of the grout returning pipe (12) is close to the hole sealing expansion ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110636719.4A CN113323643A (en) | 2021-06-07 | 2021-06-07 | Low-permeability coal body sustainable ultrasonic permeability increasing equipment and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110636719.4A CN113323643A (en) | 2021-06-07 | 2021-06-07 | Low-permeability coal body sustainable ultrasonic permeability increasing equipment and process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113323643A true CN113323643A (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110636719.4A Pending CN113323643A (en) | 2021-06-07 | 2021-06-07 | Low-permeability coal body sustainable ultrasonic permeability increasing equipment and process |
Country Status (1)
| Country | Link |
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| CN (1) | CN113323643A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753820A (en) * | 2022-04-06 | 2022-07-15 | 重庆大学 | Ultrasonic-assisted coal seam permeability increasing method and system |
| CN116816385A (en) * | 2023-04-27 | 2023-09-29 | 中铁十一局集团有限公司 | Grouting method and related equipment for water-rich broken surrounding rock |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227293B1 (en) * | 2000-02-09 | 2001-05-08 | Conoco Inc. | Process and apparatus for coupled electromagnetic and acoustic stimulation of crude oil reservoirs using pulsed power electrohydraulic and electromagnetic discharge |
| CN102900396A (en) * | 2012-11-01 | 2013-01-30 | 中国矿业大学 | Method for integrally sealing and separating gas extraction drilled hole in coal seam |
| 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 |
| CN206360718U (en) * | 2016-11-24 | 2017-07-28 | 陕西陕煤韩城矿业有限公司 | A kind of coal mine gas drainage pipe road float-type automatic water drainage device |
| CN108868702A (en) * | 2018-06-21 | 2018-11-23 | 河南理工大学 | A kind of coal bed gas ultrasonic wave desorption extraction water discharge method |
| CN110985106A (en) * | 2019-12-10 | 2020-04-10 | 西安科技大学 | Ultrasonic detection system and detection method for hole sealing quality of underground gas extraction drill hole |
| CN112253220A (en) * | 2020-09-24 | 2021-01-22 | 中国矿业大学 | Self-pressurization coal body fracturing permeability-increasing enhanced gas extraction method based on ultrasonic waves |
-
2021
- 2021-06-07 CN CN202110636719.4A patent/CN113323643A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227293B1 (en) * | 2000-02-09 | 2001-05-08 | Conoco Inc. | Process and apparatus for coupled electromagnetic and acoustic stimulation of crude oil reservoirs using pulsed power electrohydraulic and electromagnetic discharge |
| CN102900396A (en) * | 2012-11-01 | 2013-01-30 | 中国矿业大学 | Method for integrally sealing and separating gas extraction drilled hole in coal seam |
| 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 |
| CN206360718U (en) * | 2016-11-24 | 2017-07-28 | 陕西陕煤韩城矿业有限公司 | A kind of coal mine gas drainage pipe road float-type automatic water drainage device |
| CN108868702A (en) * | 2018-06-21 | 2018-11-23 | 河南理工大学 | A kind of coal bed gas ultrasonic wave desorption extraction water discharge method |
| CN110985106A (en) * | 2019-12-10 | 2020-04-10 | 西安科技大学 | Ultrasonic detection system and detection method for hole sealing quality of underground gas extraction drill hole |
| CN112253220A (en) * | 2020-09-24 | 2021-01-22 | 中国矿业大学 | Self-pressurization coal body fracturing permeability-increasing enhanced gas extraction method based on ultrasonic waves |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753820A (en) * | 2022-04-06 | 2022-07-15 | 重庆大学 | Ultrasonic-assisted coal seam permeability increasing method and system |
| CN114753820B (en) * | 2022-04-06 | 2023-12-05 | 重庆大学 | Ultrasonic-assisted coal seam permeability increasing method and system |
| CN116816385A (en) * | 2023-04-27 | 2023-09-29 | 中铁十一局集团有限公司 | Grouting method and related equipment for water-rich broken surrounding rock |
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Application publication date: 20210831 |