CN103590805B - Broaching method of coal seam channel - Google Patents
Broaching method of coal seam channel Download PDFInfo
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- CN103590805B CN103590805B CN201310594039.6A CN201310594039A CN103590805B CN 103590805 B CN103590805 B CN 103590805B CN 201310594039 A CN201310594039 A CN 201310594039A CN 103590805 B CN103590805 B CN 103590805B
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Abstract
The invention aims to provide a broaching method of a coal seam channel. The coal seam channel can be rapidly broached in the broaching method. The broaching method comprises the steps that a, high-energy inflammable material is laid in the coal seam channel; b, combustion improver is injected into the coal seam channel and the high-energy inflammable material is ignited; c, the combustion improver continues to be injected. Due to the facts that the high-energy inflammable material is laid in the coal seam channel and the combustion improver continues to be injected, part of aflame high-energy inflammable material rapidly ignites another part of the high-energy inflammable material adjacent to the part of aflame high-energy inflammable material along the laying route of the high-energy inflammable material in the coal seam channel, simultaneous combustion of the high-energy inflammable material laid in the coal seam channel can be formed, and therefore temperature of the area, where the high-energy inflammable material is laid, in the coal seam channel is rapidly and evenly increased, coal seams in the area are ignited simultaneously, simultaneous combustion of the coal seams in the area is achieved, and broaching speed of the coal seam channel is increased. In addition, the phenomena that combustion of the coal seam channel deviates from the established coal seam channel, and hole diameters of the coal seam channel are different after broaching can be avoided.
Description
Technical field
The present invention relates to mineral field of gasification, more particularly to a kind of expanding method of coal seam passage.
Background technology
Underground coal gasification(UCG) sets up at least one inlet channel and at least one typically by leading to subterranean coal from ground
Individual outlet passageway, then the above-mentioned inlet channel of gasification tunnel connection and outlet passageway are set up in coal seam, then by inlet channel
Gasifying agent is injected in gasification tunnel（Oxygen-containing gas）, coal seam is lighted, start gasification, gasification production is discharged from outlet passageway
Coal gas.
Generally carry out the passage in the coal seam of underground coal gasification(UCG)（Abbreviation coal seam passage）Diameter be not very it is big (<
300mm), in order to pass through substantial amounts of gas in gasification or form larger gasification face, typically before gasification
Reaming can be carried out to coal seam passage, means have：Using borehole-enlarging drilling tool reaming, firepower burning reaming, the molten leaching reaming of chemical liquids etc..Combustion
Burning the way of reaming is：The two ends of gasification tunnel are communicated with inlet channel and outlet passageway towards ground, from inlet channel note
Enter gasifying agent, from outlet passageway coal seam is lighted, the injection flow for grasping gasifying agent causes burning from outlet passageway progressively to air inlet
Passage is moved, while burning the part coal on gasification tunnel wall so that gasification tunnel diameter becomes big.
CN201110388215.1 discloses a kind of passage formation method for underground coal gasification, comprises the steps：A) first
Flame range is set up in the underseam of drilling；B) drilling for getting out at the already present drilling of other on the outside of flame range or centers as
Second drilling, by second lower end for drilling, carries out mechanical orientation drilling, so as to neighbouring coal seam to the coal seam near flame range
In addition pre- insertion, forms the directed access connected with flame range foundation in coal seam；C) by oxygen-containing gas Jing have the second drilling with
And directed access is delivered to flame range, hot-working is carried out to directed access, formed for coal ground so as to directed access be expanded
The gasification tunnel of lower gasification.
CN200810119354.2 discloses a kind of no-shaft underground gasification process, it is disclosed that a kind of reverse combustion
Firepower expanding method, it is specific as follows：Because Directional Drilling can not beat the hole of major diameter, therefore need for the drilling accomplished fluently to carry out firepower expansion
Greatly.As shown below, from openings to 6# wells is insertion vertical holes 1#, 2# along the line, the directional drilling of 3#, 4#, 5#, is led to
4# holes injection gasifying agent is crossed, in 5# bottomhole ignitions, by way of reverse burning, drilling is enlarged by firepower method,
When flame reaches 4# holes, gasifying agent is injected using 3# holes, by firepower reaming to 3# bottom holes, in this manner, be will pass through
The directional drilling in 1#～5# holes carries out firepower expansion.
Although the method in CN201110388215.1 and CN200810119354.2 can expand the aperture of gasification tunnel,
But because gasification tunnel is longer and coal combustion speed slow, so the aperture speed for extending gasification tunnel is burnt by said method too
Slowly.In addition, coal seam has larger crack or compared with thick dirt band layer, burning may deviate set gasification tunnel, it is also possible to cause
Pore size after gasification tunnel extension is uneven.Specifically, the more region in longitudinal crack, the burning in coal seam in coal seam
Burn along its longitudinal crack longitudinal extension so that the aperture of this region gasification tunnel is more, conversely, less in longitudinal crack
Region, coal seam longitudinal direction burning degree is little so that the aperture of this region gasification tunnel is less, after thereby resulting in gasification tunnel extension
Pore size is uneven.And be present in coal seam and with the crack of the angled extension of gasification tunnel, gasification tunnel wall can be guided
Coal seam burning along crack bearing of trend move, so as to cause burning direction deviate gasification tunnel.
The content of the invention
It is an object of the invention to provide a kind of expanding method of the coal seam passage that reaming quickly can be carried out to coal seam passage.
For achieving the above object, there is provided a kind of expanding method of coal seam passage, comprise the steps：A. in the passage of coal seam
Laying high energy combustibles；B. inject combustion adjuvant to coal seam passage and light high energy combustibles；C. combustion adjuvant is persistently injected.
According to the present invention, high energy combustibles are for caloric value or calorific value is in more than 29.5MJ/kg and burning-point or flash-point are at 300 DEG C
Following fuel.
According to the present invention, in step a：Continuously and uniformly lay in the part that it needs hole diameter enlargement along coal seam passage high
Can combustibles.
According to the present invention, in step a, following sub-step is performed：A1. high energy combustibles are fitted in housing until dress
It is full；A2. housing is positioned in the passage of coal seam；Wherein, it is provided with through hole on housing.
According to the present invention, the laying volume of high energy combustibles is the 1/ of the volume of the part that hole diameter enlargement is needed in the passage of coal seam
3-2/3。
According to the present invention, before execution step a1：High energy combustibles are fabricated to into graininess, wherein high energy combustibles
Diameter of the minimum dimension of granule more than through hole on housing.
According to the present invention, in step a2, including following sub-step：Housing is connected to into one end of conveying member；By under
Conveying member is put, housing is sent in the passage of coal seam；Separate conveying member and housing；Take out conveying member.
According to the present invention, the percent opening of housing is 10%-60%.
According to the present invention, in step a, also comprise the steps：Along existing with the direction of the diameter parallel of coal seam passage
Place blasting fuse in high energy combustibles laying surface；Or put down along the axis with coal seam passage during laying high energy combustibles
Place blasting fuse in capable direction.
According to the present invention, in stepb：Combustion adjuvant is injected by one end of coal seam passage, and from high energy combustibles laying
Light high energy combustibles in one end that one end of distance injection combustion adjuvant is farthest.
According to the present invention, in step c：Detect by the volume content of oxygen in the passage expellant gas of coal seam；When the body of oxygen
When product content is less than or equal to 0.3%, increase the injection rate of combustion adjuvant, until the volume content of oxygen is more than 0.3%.
According to the present invention, combustion adjuvant is in air, oxygen-enriched air, oxygen, oxygen and vapor, carbon dioxide and pure oxygen
One or more.
According to the present invention, high energy combustibles are in solid alcohol block, oil immersion wooden unit, solid rocket propellant, coke
Plant or various.
Compared to prior art, beneficial effects of the present invention are：
1. light in the passage of coal seam lay high energy combustibles and persistently inject combustion adjuvant, spent part high energy is inflammable
The adjacent part high energy combustibles of layout path quick igniting of the thing along it in the passage of coal seam, formation is laid on coal seam passage
In high energy combustibles burn simultaneously, the temperature in the region for being thus equipped with high energy combustibles in the passage of coal seam is rapidly and evenly carried
Height, with the coal seam ignited in the region simultaneously, so as to realize being burnt while coal seam in the region.Compared with prior art, the method
By the coal seam that counterbored area is needed in burning coal layer passage simultaneously, the reaming speed of coal seam passage is accelerated.In addition, while burning
The coal seam of above-mentioned zone so that burning will not spread along the crack in coal seam, thus avoid coal combustion and deviates set coal
The uneven phenomenon in aperture of coal seam passage after layer passage and reaming.
2. high energy combustibles are continuously and uniformly laid in the part that it needs hole diameter enlargement along coal seam passage, it is ensured that high energy
The burning of combustibles is expanded smooth with express delivery burning simultaneously；By equably laying high energy combustibles, it is ensured that middle coal seam passage
The temperature of the middle part coal seam passage for needing hole diameter enlargement is uniformly improved, to ensure that the coal seam of this part coal seam passage is burnt simultaneously；
In addition, 1/3-2/3 of the laying volume of high energy combustibles for the volume of channel section, it is ensured that the combustion heat release energy of high energy combustibles
Enough cause the burning in coal seam.
3. due to combustion adjuvant injection direction in contrast to high energy combustibles burning bearing of trend, the bootable high energy of combustion adjuvant
The burning of combustibles, so as on the one hand avoid high energy combustibles only in partial combustion, on the other hand adds to its injection direction extension
Speed is expanded in the burning of fast high energy combustibles.In addition, blasting fuse is added in the inside or surface of high energy combustibles, can be further
Accelerate extension of the flame in the laying of high energy combustibles, so as to ensure that coal seam is burnt simultaneously.
4. by using housing as high energy combustibles carrier, can simple and fast high energy combustibles are laid on into coal seam
In passage, and because high energy combustibles are filled with housing, so can be further ensured that high energy combustibles are in coal seam passage
The laying of middle uniformly continuous ground, thus can ensure that the burning expansion of high energy combustibles is smooth and be burnt simultaneously with express delivery, so as to ensure coal
Layer burns simultaneously.
Description of the drawings
Fig. 1 is the schematic diagram of one embodiment of the expanding method of the coal seam passage using the present invention.
Specific embodiment
The specific embodiment of the invention is described below in conjunction with the accompanying drawings.
With reference to Fig. 1, vertical first passage 1 and second channel 2 are set up and by first passage 1 and the to coal seam 6 from ground
The coal seam passage 3 of the connection of two passage 2.Following steps are performed afterwards：A. high energy combustibles are laid in coal seam passage 3；B. to coal
Layer passage 3 injection combustion adjuvant simultaneously lights high energy combustibles；C. combustion adjuvant is persistently injected.Wherein, coal seam passage 3 is positioned at coal seam 6
In passage, in actual coal underground gasifying furnace, coal seam passage 3 may include on inlet channel be located at coal seam 6 in channel section,
The passage of the channel section, gasification tunnel and other purposes that are located on outlet passageway in coal seam 6.Wherein it is preferred to, can be by this
Bright expanding method was used for before Coal Gasification to gasification tunnel reaming.Alternatively, combustion adjuvant is air, oxygen-enriched air, oxygen
One or more in gas, oxygen and vapor, carbon dioxide and pure oxygen；High energy combustibles are that caloric value or calorific value exist
The fuel of more than 29.5MJ/kg, burning-point or flash-point below 300 DEG C, alternatively, high energy combustibles are solid alcohol block, oil immersion
Wooden unit, solid rocket propellant, coke etc., wherein, the type of solid rocket propellant includes polyurethane, terminal hydroxy group polybutadiene
Alkene, nitrate plasticising polyethers etc., but be not limited to that the above is several, as long as meeting the above-mentioned definition to high energy combustibles and can
Play a part of the material for making coal seam burn reaming simultaneously.
Specifically, in step a, high energy is continuously and uniformly laid in the part that it needs hole diameter enlargement along coal seam passage 3
Combustibles, form high energy combustibles laying.Then execution step b, injects combustion adjuvant and to light high energy inflammable to coal seam passage 3
Thing.Thus, the part high energy combustibles in high energy combustibles laying are ignited.Then execution step c, persistently injects combustion adjuvant.
Thus the adjacent part of layout path quick igniting of the spent part of high energy combustibles laying along it in coal seam passage 3
High energy combustibles, form whole high energy combustibles laying and burn simultaneously, so make to be equipped with high energy combustibles in coal seam passage 3
Region（The part of hole diameter enlargement is needed in coal seam passage 3）Temperature rapidly and evenly improve.In the mistake for persistently injecting combustion adjuvant
Cheng Zhong, the coal seam in above-mentioned zone is ignited simultaneously, so as to realize being burnt while coal seam in the region.Compared with prior art, this
Method passes through the coal seam that counterbored area is needed in burning coal layer passage 3 simultaneously, accelerates the reaming speed of coal seam passage 3.In addition, same
When burn above-mentioned zone coal seam so that burning will not spread along the crack in coal seam, thus avoid coal combustion deviation
The uneven phenomenon in aperture of coal seam passage 3 after set coal seam passage 3 and reaming.Additionally, needing to increase at it along coal seam passage
High energy combustibles are continuously and uniformly laid in wide-aperture part, it is ensured that the burning of high energy combustibles is expanded smooth with quick same
When burn；By equably laying high energy combustibles, it is ensured that need the part coal seam passage of hole diameter enlargement in middle coal seam passage
Temperature is uniformly improved, to ensure that the coal seam of this part coal seam passage is burnt simultaneously.
Preferably, in step c：Detect by the volume content of oxygen in the expellant gas of coal seam passage 3；When the volume of oxygen contains
When amount is less than or equal to 0.3%, increase the injection rate of combustion adjuvant, that is, increase the injection flow of combustion adjuvant, until the volume content of oxygen
More than 0.3%.By the step of above-mentioned detection and regulation, it is ensured that the combustion adjuvant excess in coal seam passage 3, i.e. oxygen excess, from
And be that the burning of high energy combustibles and the burning in coal seam are smoothed out, and prevent from being burned to suitable diameter in coal seam passage 3
Before, the burning in coal seam will not extinguish.
Preferably, combustion adjuvant is injected by one end of coal seam passage 3, and from distance injection combustion adjuvant in high energy combustibles laying
The farthest one end in one end light high energy combustibles, i.e. make the flow direction of combustion adjuvant logical along coal seam with high energy combustibles laying
The axial burning in road expand it is in opposite direction, it is fast by one end thereon from there through combustion adjuvant guiding burning high energy combustibles laying
To other end extension, so as to make rapidly, high energy combustibles laying is overall to burn speed simultaneously, to be further ensured that high energy combustibles spread
The subterranean zone that layer is located（That is, the part coal seam passage that diameter need to expand in the passage of coal seam）Burn simultaneously.Specifically, prevent
Burning velocity of the high energy combustibles laying from its one end to the other end is excessively slow, and the temperature of the coal seam channel part for making to need enlarged diameter
Degree lifting is uneven, so as to simultaneously the coal seam for causing the part is not burnt.Further optionally, the laying volume of high energy combustibles
Laying volume to need the 1/3-2/3 of the volume of the part of hole diameter enlargement, i.e. high energy combustibles in the passage of coal seam is coal seam passage
The 1/3-2/3 of the volume of the middle channel section for needing reaming.It is possible thereby to ensure that the heat release that high energy combustibles burn can be by this passage
Temperature in section is promoted to the burning-point of coal, so as to coal seam of igniting.
With further reference to Fig. 1, in the present embodiment, high energy combustibles are laid in the passage of coal seam by placing housing 4,
Wherein, housing 4 is in the present embodiment round tube, and is provided with through hole above, with the height for making to be accommodated therein by through hole
Can combustibles contact combustion adjuvant.And preferably, the percent opening of housing 4 is 10%-60%.The sectional area of all through holes i.e. on housing 4
Sum is the 10%-60% of the surface area of housing 4.Also, high energy combustibles are fabricated to into graininess, the wherein granule of high energy combustibles
Minimum dimension more than through hole on housing 4 diameter so that the granule of high energy combustibles will not be in course of conveying by housing 4
Drop out.By using housing 4 as high energy combustibles carrier, can simple and fast high energy combustibles are laid on into coal seam passage
In, and because high energy combustibles are filled with housing 4, so can be further ensured that high energy combustibles are equal in the passage of coal seam
It is even continuously to lay, thus can ensure that the burning expansion of high energy combustibles is smooth and be burnt simultaneously with express delivery, so as to ensure that coal seam is same
When burn.
Further, in the present embodiment, according to the volume and length of the part that reaming is needed in the passage of coal seam, select to be adapted to
Round tube as housing 4, i.e. make round tube the area perpendicular to its axial cross section be equal to coal seam passage on need reaming
The 1/3～2/3 of the area of the cross section at place, and the length of round tube is equal in the passage of coal seam the length of the part for needing reaming.
Thus it is capable of achieving the 1/3-2/3 of the volume that the laying volume of high energy combustibles is the part that hole diameter enlargement is needed in the passage of coal seam.
Afterwards high energy combustibles are made into the sub-circular granule that equivalent diameter is 3～5cm.And further select through hole straight
The round tube of the equivalent diameter of above-mentioned granule of the footpath less than 70%, to prevent the inflammable composition granule of high energy by dropping out in round tube.Separately
Outward, it is appreciated that one end of the round tube should be sealing, to prevent the inflammable composition granule of high energy from being dropped out by round tube.
Then one end relative with one end of above-mentioned sealing on round tube is connected by screw thread or pin with conveying member 5,
In the present embodiment, conveying member 5 is drilling rod.After housing 4 and conveying member 5 are connected, whole housing 4 is sent into by ground derrick
In the passage of coal seam, make housing 4 depart from conveying member 5 by rotating screw thread or solution pin, so far realize high energy combustibles in coal seam
Continuous uniform laying in passage.
Afterwards, ignite high energy combustibles near one end of second channel 2 from housing 4, combustion adjuvant is injected by first passage 1
（That is oxygen-containing gas）, now, the partial particulate in high energy combustibles near second channel 2 starts burning, in the continuous of combustion adjuvant
Under injection, burn towards the Directional Extension contrary with the flow direction of combustion adjuvant.In the process, gather second channel 2 to discharge
Gas, and detect the volume content of oxygen in the gas, when the volume content of oxygen is more than 0.3%, increase by first passage 1
The flow of the combustion adjuvant of injection, until the volume content of oxygen is more than 0.3%.In the process, the burning of high energy combustibles is expanded rapidly
Until whole housing 4 is ignited, now, high energy combustibles can contact more combustion adjuvants for exhibition, burning it is more fierce.With height
The rib of the combustion heat release coal seam passage 3 of energy combustibles is heated, and after temperature reaches its burning-point, rib is ignited, whole coal
The rib of layer passage 3 burns simultaneously, and as a large amount of coals are burned, the equivalent diameter of coal seam passage 3 is increasing, until it reaches
Target diameter.
In one alternatively embodiment, housing 4 is fiberglass round tube, and its percent opening is 40%, and opening diameter is 2cm,
And its one end is sealed, a bit of caliber of the other end becomes big, is connected with drilling rod by screw thread.
Alternatively, along the direction with the diameter parallel of coal seam passage 3 high energy combustibles laying surface place blasting fuse,
Or place blasting fuse along the direction with the diameter parallel of coal seam passage during laying high energy combustibles.By blasting fuse
The burning that high energy combustibles laying can further be guided extends, so as to be further ensured that high energy combustibles before coal seam is ignited
Integral combustion, to ensure that coal seam is burnt simultaneously.
Certainly, conveying member 5 is not limited to the drilling rod used in above-described embodiment, and any other can be connected with housing 4 and can be
The device disconnected with housing 4 is realized in the passage of coal seam.And conveying member 5 is not limited to above-mentioned enforcement with the connected mode of housing 1
Example, can realize the connected mode disconnected with housing 4 in the passage of coal seam.And the material of housing 1 is also not limited to this enforcement
Fiberglass in example, it is all prior to coal combustion and with toughness the material that housing 1 passes through knee in the passage of coal seam can be made equal
Within the scope of the present invention.
The preferred embodiments of the present invention are these are only, the present invention is not limited to, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (11)
1. a kind of expanding method of coal seam passage, comprises the steps：
A. high energy combustibles are laid in the passage of coal seam；
B. inject combustion adjuvant to the coal seam passage and light the high energy combustibles；
C. combustion adjuvant is persistently injected；
Wherein, in step a：
High energy combustibles are continuously and uniformly laid along the coal seam passage in the part that it needs hole diameter enlargement；
Wherein, in step a, following sub-step is performed：
A1. high energy combustibles are fitted in housing until filling；
A2. housing is positioned in the passage of coal seam；
Wherein, it is provided with through hole on the housing.
2. expanding method according to claim 1, it is characterised in that
The high energy combustibles are caloric value or calorific value is in more than 29.5MJ/kg and burning-point or flash-point are below 300 DEG C fuel.
3. the expanding method of coal seam passage according to claim 1, it is characterised in that
The laying volume of the high energy combustibles is the 1/3-2/3 of the volume of the part that hole diameter enlargement is needed in the coal seam passage.
4. the expanding method of coal seam passage according to claim 1, it is characterised in that
Before step a1 is performed：
The high energy combustibles are fabricated to into graininess, wherein the minimum dimension of the granule of the high energy combustibles is more than the shell
The diameter of through hole on body.
5. the expanding method of coal seam passage according to claim 1, it is characterised in that
In step a2, including following sub-step：
The housing is connected to into one end of conveying member；
By transferring conveying member, the housing is sent in the passage of coal seam；
The conveying member is separated with the housing；
Take out the conveying member.
6. the expanding method of the coal seam passage according to any one of claim 4 or 5, it is characterised in that
The percent opening of the housing is 10%-60%.
7. the expanding method of coal seam passage according to any one of claim 1 to 2, it is characterised in that
In step a, also comprise the steps：
Blasting fuse is placed along the direction with the diameter parallel of coal seam passage on high energy combustibles laying surface；Or
Blasting fuse is placed during the high energy combustibles are laid along the direction with the diameter parallel of coal seam passage.
8. the expanding method of coal seam passage according to any one of claim 1 to 2, it is characterised in that
In step b：
Combustion adjuvant is injected by one end of coal seam passage, and it is farthest from one end of distance injection combustion adjuvant in high energy combustibles laying
Light the high energy combustibles in one end.
9. the expanding method of coal seam passage according to any one of claim 1 to 2, it is characterised in that
In step c：
Detect by the volume content of oxygen in the passage expellant gas of coal seam；
When the volume content of the oxygen is less than or equal to 0.3%, increase the injection rate of combustion adjuvant, until the volume of the oxygen contains
Amount is more than 0.3%.
10. the expanding method of coal seam passage according to any one of claim 1 to 2, it is characterised in that
The combustion adjuvant is in mixed gas, the mixed gas of carbon dioxide and pure oxygen, the oxygen of air, oxygen and vapor
One or more.
The expanding method of 11. coal seam passages according to any one of claim 1 to 2, it is characterised in that
The high energy combustibles are one or more in solid alcohol block, oil immersion wooden unit, solid rocket propellant, coke.
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| CN201310594039.6A CN103590805B (en) | 2013-11-22 | 2013-11-22 | Broaching method of coal seam channel |
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|---|---|---|---|
| CN201310594039.6A CN103590805B (en) | 2013-11-22 | 2013-11-22 | Broaching method of coal seam channel |
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| CN103590805B true CN103590805B (en) | 2017-05-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953320B (en) * | 2014-05-12 | 2017-03-15 | 新奥科技发展有限公司 | Underground gasification furnace water control method |
| CN104695933B (en) * | 2015-02-13 | 2017-11-03 | 新奥科技发展有限公司 | A kind of coal seam gasification method and coal seam gasification stove based on Multilateral Wells |
| CN104989365B (en) * | 2015-07-22 | 2017-09-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Underground coal gasification(UCG) temperature control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092052A (en) * | 1977-04-18 | 1978-05-30 | In Situ Technology, Inc. | Converting underground coal fires into commercial products |
| CN1854459A (en) * | 2005-04-21 | 2006-11-01 | 余力 | Underground coal gasification |
| CN101382065A (en) * | 2008-09-04 | 2009-03-11 | 乌兰察布新奥气化采煤技术有限公司 | No-shaft underground gasification process |
| CN102477857A (en) * | 2010-11-30 | 2012-05-30 | 新奥气化采煤有限公司 | Passage formation method for underground coal gasification |
| AU2012101716A4 (en) * | 2011-12-23 | 2013-01-10 | Linc Energy Ltd | Underground coal gasification in thick coal seams |
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2013
- 2013-11-22 CN CN201310594039.6A patent/CN103590805B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092052A (en) * | 1977-04-18 | 1978-05-30 | In Situ Technology, Inc. | Converting underground coal fires into commercial products |
| CN1854459A (en) * | 2005-04-21 | 2006-11-01 | 余力 | Underground coal gasification |
| CN101382065A (en) * | 2008-09-04 | 2009-03-11 | 乌兰察布新奥气化采煤技术有限公司 | No-shaft underground gasification process |
| CN102477857A (en) * | 2010-11-30 | 2012-05-30 | 新奥气化采煤有限公司 | Passage formation method for underground coal gasification |
| AU2012101716A4 (en) * | 2011-12-23 | 2013-01-10 | Linc Energy Ltd | Underground coal gasification in thick coal seams |
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