CN103114871A - Extraction device and method utilizing microwave coal heating layer - Google Patents
Extraction device and method utilizing microwave coal heating layer Download PDFInfo
- Publication number
- CN103114871A CN103114871A CN201310066397XA CN201310066397A CN103114871A CN 103114871 A CN103114871 A CN 103114871A CN 201310066397X A CN201310066397X A CN 201310066397XA CN 201310066397 A CN201310066397 A CN 201310066397A CN 103114871 A CN103114871 A CN 103114871A
- Authority
- CN
- China
- Prior art keywords
- extraction
- coal seam
- gas
- coal
- microwave
- 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.)
- Pending
Links
Images
Landscapes
- Constitution Of High-Frequency Heating (AREA)
Abstract
Disclosed are extraction device and method utilizing a microwave coal heating layer. The extraction device mainly comprises an extraction and drainage pipe (1), a helical antenna (7), a front-loaded cover (6), a cable (8), a microwave generator (9), a controller (10), a cooling device (11), a gas exhaust pipe (12) and the like. The problems of low extraction rate and extraction speed of existing extraction methods are solved. The extraction method is characterized by including: firstly drilling a hole at an appointed position of an extraction coal layer, paving an anchorage net on the surface of the extraction coal layer and drilling a drill rod to reinforce the coal layer; placing the extraction and drainage pipe with the helical antenna into the drilled hole by the distance 0.6-1.0m away from the coal layer, sealing the hole by high-temperature-resistant cement grouting, and starting the microwave generator to heat the extraction coal layer to the temperature of 80-200 DEG C. After the coal layer is heated, desorption speed of gas is increased, the free gas is increased to cause increase of gas volume of the coal layer, so gas pressure is increased and gas extraction rate of gas of the coal layer in the negative-pressure extraction drilled hole is increased favorably.
Description
Technical field
The present invention relates to a kind of drainage device that utilizes microwave technology heating coal seam, belong to coal bed gas extraction technical field, be suitable for high gas lower permeability seam and draw out methane.
Background technology
The most of colliery of China is all highly gassy mine, and coal and Gas Outburst, the Disasters such as gas explosion are natural calamities serious in coal mining, progressively increasing along with the pit mining degree of depth and scale, coal seam gas-bearing capacity increases gradually, and Gas Disaster is also more serious, not only affects the safety of coal mines High-efficient Production, and threaten mine personnel safety, have a strong impact on China's coal-mine safety in production and economic sustainable and stable development.
Highly gassy mine all will carry out gas pumping to the coal seam before exploiting at present, main pumping method has ground drilling to implement gas drainage under suction, the gas drainage under suction of this coal bed drilling closes on heading boring associating extraction, the methods such as adjacent coal seam layer-through drilling extraction.Its basic principle is that the negative pressure extraction is carried out in boring in the coal seam, and the gas that the boring ambient pressure is high is mobile to the low-pressure area of boring.But because the most of coal seam of China belongs to low permeability coal seam, cause this negative pressure extraction not reach desirable effect to low permeability coal seam, and the extraction time is longer, affects the safe and efficient production in colliery.
Temperature has obvious impact to the coal-bed gas adsorption capacity, and temperature is higher, and coal adsorption gas amount is less.Determine that with following empirical formula temperature is on the impact of gas adsorption amount:
X
t=X
0e
-nt
[0005] X in formula
t, X
0The adsorption gas amount of coal when-temperature is respectively t ℃ and 0 ℃, m
3/ t
The temperature of t-coal, ℃; The constant that n-is relevant with gas pressure; N=0.02/ (0.993+0.07P); The P-gas pressure, MP.
Microwave refers to the uhf electromagnetic wave of frequency between 0.3~300GHz, and since nineteen fifty found that for the first time microwave can be used for to the material heating, microwave heating effect research was rapidly developed, and is widely used in industrial circle and resident living.Microwave has that firing rate is fast, efficient is high, intensification easy to operate, untouchable, object is not to transmit by heat but the advantage such as complete by outfield and object interaction.
Therefore utilize the heating using microwave coal seam to be conducive to the parsing of gas in the coal seam, reduce the time of Gas Drainage from Virgin Coal Seams, improve the effect of gas drainage under suction.
Summary of the invention
The object of the invention is to effectively to solve the difficult problem in high gas lower permeability seam gas pumping process, a kind of method of utilizing the heating using microwave gas drainage from coal seam is provided, the method can improve the penetrating power in coal seam, strengthen the ability that gas is resolved in the coal seam, accelerate the extraction speed of gas and improve the extraction rate.
The technical solution adopted in the present invention is as follows:
On the basis of original extraction system, the front end of each extraction borehole is installed the microwave antenna of a spiral, and the spacing of extraction borehole is decided according to the scope that helical antenna can cover, and is the diametral distance of antenna institute coverage.After the extraction system debug is complete, start microwave generator, give each extraction borehole heating, the coal seam is heated to 80 ℃-200 ℃, down-hole coal bed more micro-crack or the microfissure of at high temperature producing, adsorption gas is free gas with rapid desorb, increasing of free gas causes the change of coal-bed gas volume large, then gas pressure increases, and is conducive to flowing of coal-bed gas, improves the extraction speed of gas under the effect of negative pressure extraction boring.
The described drainage device that utilizes the heating using microwave coal seam, applicable equally for the extraction in the unconventional natural gas such as dark basin gas, shale gas field.
Concrete steps of the present invention are:
1. carry out anchor net and bolt anchorage to the coal seam drilling that carries out gas pumping, and to the coal seam, prevent excessive coal and the gas burst accident of causing of coal-bed gas pressure in heating process.
2. will put into boring with the releasing pipe of helical antenna, and make the helical antenna of releasing pipe front end be about 0.6-1.0m apart from coal seam length.
3. adopt the high temperature resistant cement grouting filling between above-mentioned releasing pipe and boring.
4. will be connected with microwave generator with the releasing pipe of helical antenna, and start the uhf electromagnetic wave that microwave generator produces 915MHz, through cable, distribute to each helical antenna by controller, the coal seam temperature is controlled in 80 ℃-200 ℃.
5. open negative pressure on ground extraction system, to the heating coal seam carrying out extraction.
The heating using microwave gas drainage from coal seam method of utilizing of the present invention can improve coal-bed gas pressure, increases gas flow speed, increases coal seam permeability, accelerates the desorption rate of coal-bed gas, thus can be more efficiently mash gas extraction fast.
Description of drawings
Fig. 1 is coal seam surface drilling arrangement diagram.
Fig. 2 is the structural representation that the present invention utilizes heating using microwave coal seam device.
Fig. 3 is the method flow diagram that utilizes the heating using microwave coal seam of the present invention.
In figure: 1-releasing pipe, the slip casting of 2-high temperature resistant cement, 3-anchor net, 4-anchor pole, 5-extraction coal seam, the preposition cover of 6-, 7-helical antenna, 8-cable, 9-microwave generator, 10-controller, 11-heat sink, 12-gas-removing pipeline.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail:
As shown in Figure 1, utilize the drainage device in heating using microwave coal seam mainly to be formed by releasing pipe, helical antenna, preposition cover, cable, microwave generator, controller, heat sink, drawing-off gas pipe in the present invention, wherein: the length of helical antenna is for adopting 1/4 left and right of microwave wavelength, the frequency of microwave generator is 915MHz, and preposition cover outer wall is the filter screen with gas permeability.
At first select by extraction coal seam (5), play extraction boring to the position of appointment, the interval between adjacent boring is equal to or slightly greater than the diameter that penetrates of helical antenna, and to the drilling coal seam carrying out anchor net (3) and anchor pole (4) consolidation process.
The releasing pipe (1) that helical antenna is housed is put into boring, make the preposition cover (6) of releasing pipe front end be about 0.6-1.0m apart from coal seam length.
Adopt high temperature resistant cement slip casting (2) that the hole between releasing pipe and boring is filled up.
To be connected with microwave generator (9) with the releasing pipe (1) of helical antenna, and the startup microwave generator produces the uhf electromagnetic wave of 915MHz, through cable (8), and distribute to each helical antenna (7), the coal seam temperature is heated in 80 ℃-200 ℃.Open simultaneously negative pressure on ground extraction system, to the heating coal seam carrying out extraction.
The heating using microwave gas drainage from coal seam method of utilizing of the present invention, can be fast and effectively the extraction coal seam be heated in 80 ℃-200 ℃, can effectively improve coal-bed gas pressure, increase gas flow speed, produce more micro-crack or microfissure in the coal seam, increase coal seam permeability, accelerate the desorption rate of coal-bed gas, thereby reach the efficient extraction purpose in high gas hypotonicity coal seam.
Claims (4)
1. drainage device and method of utilizing the heating using microwave coal seam, comprising: it comprises releasing pipe (1), helical antenna (7), preposition cover (6), cable (8), microwave generator (9), controller (10), heat sink (11), drawing-off gas pipe (12) etc.It is characterized in that: select extraction coal seam (5) to assigned address drilling (1), and spread anchor net (3) on surface, extraction coal seam and beat anchor pole (4) and reinforce the coal seam, putting into boring with the releasing pipe of helical antenna (7), the about 0.6-1.0m apart from coal seam, the place ahead, carry out sealing of hole with high temperature resistant cement slip casting (2), open microwave generator (9) heating extraction coal seam to 800C-2000C.
2. the pumping method that utilizes the heating using microwave coal seam as device as described in above-mentioned claim, is characterized in that comprising the steps:
A. carry out anchor net (3) and anchor pole (4) reinforcing to the coal seam of carrying out gas pumping (5) drilling, and to the coal seam, prevent excessive coal and the gas burst accident of causing of coal-bed gas pressure in heating process.
B. will put into boring with the releasing pipe (1) of helical antenna (7), and allow the helical antenna of releasing pipe (1) front end be about 0.6-1.0m apart from coal seam length.
C. adopt high temperature resistant cement slip casting (2) filling between above-mentioned releasing pipe (1) and boring.
D. will be connected with microwave generator (9) with the releasing pipe (1) of helical antenna, and the startup microwave generator produces the uhf electromagnetic wave of 915MHz, through cable (8), distribute to each helical antenna (7) by controller (10), the coal seam temperature is controlled in 800C-2000C.
E. open negative pressure on ground extraction system, to the heating coal seam carrying out extraction.
3. the heating using microwave drainage from coal seam device that utilizes according to claim 1 is characterized in that the frequency of the microwave generator (9) that adopts is 915MHz.
4. the heating using microwave drainage from coal seam device and method that utilizes according to claim 1 is characterized in that: the device that utilizes this heating using microwave coal seam is applicable equally for the extraction in the unconventional natural gas such as dark basin gas, shale gas field.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310066397XA CN103114871A (en) | 2013-03-04 | 2013-03-04 | Extraction device and method utilizing microwave coal heating layer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310066397XA CN103114871A (en) | 2013-03-04 | 2013-03-04 | Extraction device and method utilizing microwave coal heating layer |
Publications (1)
Publication Number | Publication Date |
---|---|
CN103114871A true CN103114871A (en) | 2013-05-22 |
Family
ID=48413303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201310066397XA Pending CN103114871A (en) | 2013-03-04 | 2013-03-04 | Extraction device and method utilizing microwave coal heating layer |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN103114871A (en) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103696746A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Microwave excitation coal-bed gas desorption and seepage experimental device |
CN103698411A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Device and method for improving coal bed gas desorption efficiency with microwaves |
CN104533514A (en) * | 2015-01-12 | 2015-04-22 | 中国矿业大学 | Method for thermal displacement type forced gas drainage in drill holes |
CN104632270A (en) * | 2015-01-06 | 2015-05-20 | 中国矿业大学 | Oscillating impulse type high-energy gas fracturing and heat injection alternating gas-extracting method |
CN104863555A (en) * | 2015-05-18 | 2015-08-26 | 太原理工大学 | Method for improving downhole heating coal seam gas extraction amount |
CN105484720A (en) * | 2015-12-29 | 2016-04-13 | 中国矿业大学 | Microwave-assisted extraction and hydrofracture cooperative coal seam anti-reflection method |
CN105525901A (en) * | 2015-12-29 | 2016-04-27 | 中国矿业大学 | Coal seam hydrofracture strengthening permeability increasing method based on microwave irradiation |
CN105735954A (en) * | 2016-01-29 | 2016-07-06 | 辽宁工程技术大学 | Electromagnetic heat-radiation coal bed permeability improvement drill rod device and using method thereof |
CN106321142A (en) * | 2016-11-01 | 2017-01-11 | 中国矿业大学 | Rock cross-cut coal uncovering method combining microwave-assisted extraction with grouting reinforcement |
CN106499366A (en) * | 2016-11-01 | 2017-03-15 | 中国矿业大学 | A kind of coal bed gas enhanced recovery method that microwave is mutually cooperateed with ultrasound wave |
CN106523025A (en) * | 2017-01-10 | 2017-03-22 | 河南理工大学 | Microwave system facilitating coal mass gas desorption |
CN106593512A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Combined supporting and cooling device for high-temperature mine roadway |
CN106593511A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Cooling system and method for high-temperature mine roadway support |
CN106761905A (en) * | 2017-01-06 | 2017-05-31 | 山东科技大学 | A kind of promotion gas pumping method based on electrocaloric effect |
CN106869991A (en) * | 2017-03-06 | 2017-06-20 | 中国矿业大学 | A kind of microwave hot air couples the coal body anti-reflection method of heat injection |
CN106988702A (en) * | 2017-05-02 | 2017-07-28 | 贵州大学 | Arrangement heating cable hole sealing device and method for sealing in one kind drilling |
CN107130998A (en) * | 2017-07-12 | 2017-09-05 | 贵州大学 | A kind of heating cable heats coal seam temperature monitoring system |
CN107575185A (en) * | 2017-09-14 | 2018-01-12 | 辽宁工程技术大学 | A kind of method in underground using the effect extraction coal bed gas that colds and heat succeed each other |
CN107701163A (en) * | 2017-10-11 | 2018-02-16 | 山东科技大学 | The blast of a kind of thermal agitation and drilling gas cooperates the secondary permeability improvement device in coal seam and method |
CN107842350A (en) * | 2017-11-07 | 2018-03-27 | 河南理工大学 | A kind of method that extraction rate is improved in high gas remainder quantity coal seam of underground coal mine |
CN109115659A (en) * | 2018-08-02 | 2019-01-01 | 西南石油大学 | A kind of experimental method for verifying coal bed gas microwave mining feasibility |
CN110318755A (en) * | 2019-06-13 | 2019-10-11 | 太原理工大学 | A kind of method and apparatus that coal column is left in the residual exploiting field of microwave heating uplink fracturing |
CN110836113A (en) * | 2019-11-14 | 2020-02-25 | 中国矿业大学 | Method for improving top coal caving performance of fully mechanized caving face by using controllable source microwave radiation |
CN110953019A (en) * | 2020-01-02 | 2020-04-03 | 中国矿业大学(北京) | Method for improving early strength of filling body by using microwave technology |
CN115434671A (en) * | 2022-09-10 | 2022-12-06 | 中国矿业大学 | Coal seam pressure relief and permeability increasing method and system |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4620593A (en) * | 1984-10-01 | 1986-11-04 | Haagensen Duane B | Oil recovery system and method |
US4819723A (en) * | 1987-04-06 | 1989-04-11 | Conoco Inc. | Reducing the permeability of a rock formation |
RU2159333C1 (en) * | 2000-05-05 | 2000-11-20 | Московский государственный горный университет | Process of outgassing of coal formation |
CN1508387A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
CN1609409A (en) * | 2004-11-23 | 2005-04-27 | 中国科学院广州能源研究所 | Method and apparatus for producing natural gas hydras utilizing microwave heating |
CN101074607A (en) * | 2007-05-15 | 2007-11-21 | 颜曙光 | Chemical method for preventing gas disaster and its special apparatus |
US20090173488A1 (en) * | 2008-01-03 | 2009-07-09 | Colorado Seminary | High power microwave petroleum recovery |
CN101709636A (en) * | 2009-10-27 | 2010-05-19 | 新疆敦华石油技术有限公司 | Microwave heating system for lowering viscosity of produced liquid in oil well |
US20120012319A1 (en) * | 2010-07-16 | 2012-01-19 | Dennis Tool Company | Enhanced hydrocarbon recovery using microwave heating |
-
2013
- 2013-03-04 CN CN201310066397XA patent/CN103114871A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4620593A (en) * | 1984-10-01 | 1986-11-04 | Haagensen Duane B | Oil recovery system and method |
US4819723A (en) * | 1987-04-06 | 1989-04-11 | Conoco Inc. | Reducing the permeability of a rock formation |
RU2159333C1 (en) * | 2000-05-05 | 2000-11-20 | Московский государственный горный университет | Process of outgassing of coal formation |
CN1508387A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
CN1609409A (en) * | 2004-11-23 | 2005-04-27 | 中国科学院广州能源研究所 | Method and apparatus for producing natural gas hydras utilizing microwave heating |
CN101074607A (en) * | 2007-05-15 | 2007-11-21 | 颜曙光 | Chemical method for preventing gas disaster and its special apparatus |
US20090173488A1 (en) * | 2008-01-03 | 2009-07-09 | Colorado Seminary | High power microwave petroleum recovery |
CN101709636A (en) * | 2009-10-27 | 2010-05-19 | 新疆敦华石油技术有限公司 | Microwave heating system for lowering viscosity of produced liquid in oil well |
US20120012319A1 (en) * | 2010-07-16 | 2012-01-19 | Dennis Tool Company | Enhanced hydrocarbon recovery using microwave heating |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103698411A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Device and method for improving coal bed gas desorption efficiency with microwaves |
CN103696746A (en) * | 2013-12-25 | 2014-04-02 | 辽宁工程技术大学 | Microwave excitation coal-bed gas desorption and seepage experimental device |
CN103698411B (en) * | 2013-12-25 | 2015-06-17 | 辽宁工程技术大学 | Device and method for improving coal bed gas desorption efficiency with microwaves |
CN104632270B (en) * | 2015-01-06 | 2016-11-16 | 中国矿业大学 | A kind of oscillating impulse formula high enegry gas fracturing and heat injection alternation mash gas extraction method |
CN104632270A (en) * | 2015-01-06 | 2015-05-20 | 中国矿业大学 | Oscillating impulse type high-energy gas fracturing and heat injection alternating gas-extracting method |
CN104533514B (en) * | 2015-01-12 | 2017-07-07 | 中国矿业大学 | Hot displacement type enhanced gas extraction method in one kind drilling |
WO2016112759A1 (en) * | 2015-01-12 | 2016-07-21 | 中国矿业大学 | Method for thermal-displacement-type strengthened extraction in drill hole |
US9869168B2 (en) | 2015-01-12 | 2018-01-16 | China University Of Mining And Technology | Method for thermal-displacement-type strengthened extraction in drill hole |
CN104533514A (en) * | 2015-01-12 | 2015-04-22 | 中国矿业大学 | Method for thermal displacement type forced gas drainage in drill holes |
CN104863555A (en) * | 2015-05-18 | 2015-08-26 | 太原理工大学 | Method for improving downhole heating coal seam gas extraction amount |
CN105525901A (en) * | 2015-12-29 | 2016-04-27 | 中国矿业大学 | Coal seam hydrofracture strengthening permeability increasing method based on microwave irradiation |
CN105484720B (en) * | 2015-12-29 | 2017-10-24 | 中国矿业大学 | The coal seam anti-reflection method that a kind of On Microwave-assisted Extraction is mutually cooperateed with hydraulic fracturing |
CN105525901B (en) * | 2015-12-29 | 2017-10-24 | 中国矿业大学 | A kind of coal seam hydraulic fracture reinforcing anti-reflection method based on microwave irradiation |
CN105484720A (en) * | 2015-12-29 | 2016-04-13 | 中国矿业大学 | Microwave-assisted extraction and hydrofracture cooperative coal seam anti-reflection method |
CN105735954B (en) * | 2016-01-29 | 2018-04-27 | 辽宁工程技术大学 | A kind of electromagnetic heat radiation coal seam is anti-reflection boring rod set and its application method |
CN105735954A (en) * | 2016-01-29 | 2016-07-06 | 辽宁工程技术大学 | Electromagnetic heat-radiation coal bed permeability improvement drill rod device and using method thereof |
CN106499366A (en) * | 2016-11-01 | 2017-03-15 | 中国矿业大学 | A kind of coal bed gas enhanced recovery method that microwave is mutually cooperateed with ultrasound wave |
CN106499366B (en) * | 2016-11-01 | 2019-04-26 | 中国矿业大学 | A kind of coal bed gas enhanced recovery method that microwave is mutually cooperateed with ultrasonic wave |
CN106321142A (en) * | 2016-11-01 | 2017-01-11 | 中国矿业大学 | Rock cross-cut coal uncovering method combining microwave-assisted extraction with grouting reinforcement |
CN106761905A (en) * | 2017-01-06 | 2017-05-31 | 山东科技大学 | A kind of promotion gas pumping method based on electrocaloric effect |
CN106761905B (en) * | 2017-01-06 | 2018-07-24 | 山东科技大学 | A kind of promotion gas pumping method based on electrocaloric effect |
CN106593512A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Combined supporting and cooling device for high-temperature mine roadway |
CN106593511B (en) * | 2017-01-10 | 2019-02-15 | 中国矿业大学 | A kind of thermal post_buckling roadway support cooling system and method |
CN106593511A (en) * | 2017-01-10 | 2017-04-26 | 中国矿业大学 | Cooling system and method for high-temperature mine roadway support |
CN106523025B (en) * | 2017-01-10 | 2018-10-12 | 河南理工大学 | Promote the microwave system of coal gas desorption |
CN106523025A (en) * | 2017-01-10 | 2017-03-22 | 河南理工大学 | Microwave system facilitating coal mass gas desorption |
CN106593512B (en) * | 2017-01-10 | 2019-02-15 | 中国矿业大学 | A kind of high-temperature mine tunnel combined supporting and cooling device |
CN106869991A (en) * | 2017-03-06 | 2017-06-20 | 中国矿业大学 | A kind of microwave hot air couples the coal body anti-reflection method of heat injection |
CN106988702A (en) * | 2017-05-02 | 2017-07-28 | 贵州大学 | Arrangement heating cable hole sealing device and method for sealing in one kind drilling |
CN107130998A (en) * | 2017-07-12 | 2017-09-05 | 贵州大学 | A kind of heating cable heats coal seam temperature monitoring system |
CN107575185A (en) * | 2017-09-14 | 2018-01-12 | 辽宁工程技术大学 | A kind of method in underground using the effect extraction coal bed gas that colds and heat succeed each other |
CN107701163A (en) * | 2017-10-11 | 2018-02-16 | 山东科技大学 | The blast of a kind of thermal agitation and drilling gas cooperates the secondary permeability improvement device in coal seam and method |
CN107842350B (en) * | 2017-11-07 | 2019-08-02 | 河南理工大学 | A kind of method that extraction rate is improved in the high gas remainder quantity coal seam of underground coal mine |
CN107842350A (en) * | 2017-11-07 | 2018-03-27 | 河南理工大学 | A kind of method that extraction rate is improved in high gas remainder quantity coal seam of underground coal mine |
CN109115659A (en) * | 2018-08-02 | 2019-01-01 | 西南石油大学 | A kind of experimental method for verifying coal bed gas microwave mining feasibility |
CN110318755A (en) * | 2019-06-13 | 2019-10-11 | 太原理工大学 | A kind of method and apparatus that coal column is left in the residual exploiting field of microwave heating uplink fracturing |
CN110836113A (en) * | 2019-11-14 | 2020-02-25 | 中国矿业大学 | Method for improving top coal caving performance of fully mechanized caving face by using controllable source microwave radiation |
CN110953019A (en) * | 2020-01-02 | 2020-04-03 | 中国矿业大学(北京) | Method for improving early strength of filling body by using microwave technology |
CN115434671A (en) * | 2022-09-10 | 2022-12-06 | 中国矿业大学 | Coal seam pressure relief and permeability increasing method and system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN103114871A (en) | Extraction device and method utilizing microwave coal heating layer | |
WO2022252591A1 (en) | Cracking permeability increasing method combining hydraulic fracturing and methane in-situ combustion explosion | |
CN104533514B (en) | Hot displacement type enhanced gas extraction method in one kind drilling | |
CN102926770B (en) | Underground draining and grouting process in thin bedrock and thick loose sand layer rich water areas | |
CN104863628B (en) | One kind utilizes the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing | |
CN104314606B (en) | Hydraulic slotted liner technique and the combined reinforced pumping method of gas explosion fracturing coal body in a kind of boring | |
CN106930744A (en) | A kind of millisecond multistage directional blasting dry ice fracturing method and blasting cartridge | |
CN103122759B (en) | A kind of coal bed gas well multielement hot fluid enhanced recovery method | |
CN105525901B (en) | A kind of coal seam hydraulic fracture reinforcing anti-reflection method based on microwave irradiation | |
CN104612746A (en) | Cutting-exploding coupled coal anti-reflection method in drilled hole | |
CN109854210A (en) | Using the gas pumping method and extraction system of liquid nitrogen and steam fracturing coal seam | |
CN102400669A (en) | Method for draining gas by heating coal bed through drilling | |
CN204941505U (en) | Liquid carbon dioxide big gun is with proppant explosion permeability improvement device | |
CN106523025B (en) | Promote the microwave system of coal gas desorption | |
CN104329113B (en) | A kind of method of surface drilling standing seat earth release mash gas extraction | |
CN105370257A (en) | High-power electric-knocking auxiliary hydraulic fracturing production increase method for coal-bed gas well | |
CN105178933A (en) | Environmental protection type under-well formation fracturing device | |
CN105114116A (en) | Method for strengthening regional gas extraction through hydro-thermal coupling fracturing | |
WO2024103622A1 (en) | Coal-measure gas development method based on horizontal-well methane in-situ combustion explosion fracturing | |
CN102493831A (en) | Method for extracting coal seam gas through ground fracturing and underground horizontal drill holes | |
CN104612640A (en) | Underground coal mine drilling, heat injection and hole sealing integration method | |
CN104265258A (en) | Fracture-assisted combustion of oil in-situ stimulation thickened oil exploiting method | |
CN105201483A (en) | Environment-friendly downhole stratum fracturing method | |
CN203531877U (en) | Underground coal mine fracturing connecting device | |
CN108756883A (en) | A kind of coal mine tight roof slip casting fracturing process and system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C05 | Deemed withdrawal (patent law before 1993) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130522 |