CN106761584A - Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions - Google Patents
Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions Download PDFInfo
- Publication number
- CN106761584A CN106761584A CN201710105233.1A CN201710105233A CN106761584A CN 106761584 A CN106761584 A CN 106761584A CN 201710105233 A CN201710105233 A CN 201710105233A CN 106761584 A CN106761584 A CN 106761584A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- goaf
- gas
- valve
- macropore
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000005065 mining Methods 0.000 title claims abstract description 8
- 238000000605 extraction Methods 0.000 claims abstract description 21
- 239000003651 drinking water Substances 0.000 claims abstract description 18
- 235000020188 drinking water Nutrition 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims 1
- 238000004321 preservation Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001179 sorption measurement Methods 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
- 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
-
- 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
- E21F16/00—Drainage
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions.Constructed downwards by ground a macropore, basseted to plug-in-sleeve in macropore to macropore bottom, and sleeve upper end；Concrete slurry is injected between sleeve pipe and macropore to be sealed.Centered on the axis of sleeve pipe, one aperture of construction is until goaf bottom.Be inserted into drinking-water pipe to aperture, the upper end of drinking-water pipe through sleeve pipe and with sleeve upper end welding, and the side perforate of sleeve pipe and connected with drainage tube.Ponding in goaf is extracted by drinking-water pipe, then coal bed gas of the preservation in Residual coal in goaf is released, can now pass through drainage tube extraction coal bed gas.Present device is simple, easy to operate, and it is multiplex to realize a hole, gas-water separation.
Description
Technical field
The present invention relates to a kind of method for remaining coal bed gas in ground extraction underground goaf, it is particularly suited for aqueous conditions
The coal bed gas extraction in lower abandoned mine goaf.
Background technology
China is coal production and country of consumption maximum in the world.The coal mining of extensive high intensity is produced for a long time
Plurality of abandoned mine and the huge goaf of area, and during most abandoned mines are-highly gassy mine.It is right
Abandoned mine coal bed gas carry out methane drainage and utilization project not only can by long-term ignored abandoned mine goaf coal bed gas resource " change give up into
It is precious ", while safety guarantee can be provided for the residual coal second mining that coal resources lose more serious abandoned mine.
However, China's majority mine hydrogeology complicated condition, discarded to have suffered water logging afterwards, this is caused in goaf
Still there is quite a few coal bed gas to be blocked by waterpower, preservation is in Residual coal in goaf.But existing goaf coal bed gas is taken out
Adopt technology and seldom consider influence of the water in gob area to coal bed gas extraction.Therefore, need seek under a kind of aqueous conditions to discard ore deposit
The method of the efficient extraction coal bed gas in well goaf.
The content of the invention
The present invention provides abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions.
Technical scheme：Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions, its tool
Hold in vivo as follows：
A. by ground, construction diameter is that 0.25 ~ 0.30m and depth are the macropore of 8 ~ 10m downwards, to plug-in-sleeve in macropore to big
Bottom hole portion, and sleeve upper end bassets 0.5 ~ 1.0m；Concrete slurry is injected between sleeve pipe and macropore.
B. centered on the axis of sleeve pipe, construction diameter is the aperture of 0.15 ~ 0.20m until goaf bottom.To aperture
Drinking-water pipe is inserted into, the upper end of drinking-water pipe is welded through sleeve pipe and with sleeve upper end, and the upper end of drinking-water pipe is provided with the first valve；
Sleeve pipe side perforate and connect with drainage tube, the second valve, gas flowmeter and gas are installed on drainage tube successively dense
Degree detector.
C. the first valve is opened, the second valve is closed, the ponding in goaf is extracted by drinking-water pipe, until drinking-water pipe is taken out
When not going out ponding, the first valve is closed, the second valve is opened, through the coal bed gas in drainage tube extraction goaf；Meter just starts to take out
Gas flowmeter and the registration product of gas concentration detector are M when adopting, when gas flowmeter and gas concentration during extraction
When the registration product N of detector reaches the 1/6 ~ 1/4 of M, stop extraction.
D. circulation step c, until M when gas flowmeter reaches first extraction with the registration product M of gas concentration detector
1/10 when, then close the second valve, complete the extraction to coal bed gas in goaf.
Beneficial effects of the present invention：
（1）Surface drilling is both used for draining, and to extraction coal bed gas, realizes that a hole is multiplex, gas-water separation.
（2）By extracting water in gob area so that coal bed gas of the preservation in Residual coal in goaf is released, so as to realize
The efficient extraction of coal bed gas.
Brief description of the drawings
Fig. 1 is know-why schematic diagram of the invention.
In figure：1. the drinking-water pipe 8. of 2. macropore of ground, 3. sleeve pipe, 4. concrete slurry, 5. aperture, 6. goaf 7.
The ponding of one valve, 9. 12. gas concentration detector of drainage tube 10. second valve, 11. gas flowmeter 13..
Specific embodiment
Present example is further described below in conjunction with the accompanying drawings：
A. by ground (1), construction diameter is 0.25 ~ 0.30m and depth is the macropore (2) of 8 ~ 10m downwards, is inserted in macropore (2)
Enter sleeve pipe (3) to macropore (2) bottom, and sleeve pipe (3) upper end is basseted (1) 0.5 ~ 1.0m；Sleeve pipe (3) and macropore (2) it
Between inject concrete slurry（4）.
B. centered on the axis of sleeve pipe (3), construction diameter is the aperture (5) of 0.15 ~ 0.20m until goaf (6) bottom
Portion.Drinking-water pipe (7) is inserted into aperture (5), the upper end of drinking-water pipe (7) is welded through sleeve pipe (3) and with sleeve pipe (3) upper end, and
The upper end of drinking-water pipe (7) is provided with the first valve (8)；Sleeve pipe (3) side perforate and connect with drainage tube (9), drainage tube (9)
On be installed on the second valve (10), gas flowmeter (11) and gas concentration detector (12) successively.
C. the first valve (8) is opened, the second valve (10) is closed, the ponding in goaf (6) is extracted by drinking-water pipe (7)
（13）, until drinking-water pipe (7) can not take out ponding（13）When, the first valve (8) is closed, the second valve (10) is opened, through drainage tube
(9) coal bed gas in extraction goaf (6)；Meter just starts gas flowmeter during extraction（11）With gas concentration detector（12）'s
Registration product is M, and gas flowmeter is worked as during extraction（11）With gas concentration detector（12）Registration product N reach M's
When 1/6 ~ 1/4, stop extraction.
D. circulation step c, until gas flowmeter（11）With gas concentration detector（12）Registration product M reach for the first time
During extraction M 1/10 when, then close the second valve (10).
Due to the ponding in goaf (6)（13）It is pumped, so that the pressure reduction of system so that preservation is in coal is lost
Coal bed gas is desorbed, and is changed into free state by ADSORPTION STATE, therefore can realize extraction to coal bed gas.
Claims (1)
1. abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions, it is characterised in that including following content：
A. by ground (1), construction diameter is 0.25 ~ 0.30m and depth is the macropore (2) of 8 ~ 10m downwards, is inserted in macropore (2)
Enter sleeve pipe (3) to macropore (2) bottom, and sleeve pipe (3) upper end is basseted (1) 0.5 ~ 1.0m；Sleeve pipe (3) and macropore (2) it
Between inject concrete slurry（4）；
B. centered on the axis of sleeve pipe (3), construction diameter is the aperture (5) of 0.15 ~ 0.20m until goaf (6) bottom,
Drinking-water pipe (7) is inserted into aperture (5), the upper end of drinking-water pipe (7) is welded through sleeve pipe (3) and with sleeve pipe (3) upper end, and is drawn water
The upper end for managing (7) is provided with the first valve (8)；Sleeve pipe (3) side perforate and connect with drainage tube (9), on drainage tube (9) according to
It is secondary to be installed on the second valve (10), gas flowmeter (11) and gas concentration detector (12)；
C. the first valve (8) is opened, the second valve (10) is closed, the ponding in goaf (6) is extracted by drinking-water pipe (7)（13）,
Until drinking-water pipe (7) can not take out ponding（13）When, the first valve (8) is closed, the second valve (10) is opened, taken out through drainage tube (9)
Adopt the coal bed gas in goaf (6)；Meter just starts gas flowmeter during extraction（11）With gas concentration detector（12）Registration
Product is M, and gas flowmeter is worked as during extraction（11）With gas concentration detector（12）Registration product N reach M 1/6 ~
When 1/4, stop extraction；
D. circulation step c, until gas flowmeter（11）With gas concentration detector（12）Registration product N reach and just start to take out
Detection of gas flow rate meter when adopting（11）With gas concentration detector（12）Registration product M 1/10 when, then close the second valve
(10)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710105233.1A CN106761584A (en) | 2017-02-25 | 2017-02-25 | Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710105233.1A CN106761584A (en) | 2017-02-25 | 2017-02-25 | Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106761584A true CN106761584A (en) | 2017-05-31 |
Family
ID=58959545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710105233.1A Pending CN106761584A (en) | 2017-02-25 | 2017-02-25 | Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106761584A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762554A (en) * | 2017-09-15 | 2018-03-06 | 徐州工程学院 | The system that a kind of old abandoned mine places discarded concrete and sequestration of carbon dioxide |
| CN109209474A (en) * | 2018-09-27 | 2019-01-15 | 太原理工大学 | A kind of method that dual-lateral well extracts lower coal seam and top more goaf gas and ponding |
| CN110409360A (en) * | 2019-06-20 | 2019-11-05 | 中国矿业大学 | A kind of hole bottom water library built by separate periods method based on interior row's opencut intermediate axle |
| CN110409359A (en) * | 2019-06-20 | 2019-11-05 | 中国矿业大学 | Row outdoor pit bottom water library is segmented building method in a kind of |
| CN110748377A (en) * | 2019-11-28 | 2020-02-04 | 中节能宁夏新能源股份有限公司 | Method and device for double extraction of gas and water in abandoned mine |
| CN110939407A (en) * | 2018-09-25 | 2020-03-31 | 山西省煤炭地质勘查研究院 | Double-deck overlapping goaf ground drainage well structure and recovery unit |
| CN114151038A (en) * | 2021-12-09 | 2022-03-08 | 太原理工大学 | Automatic water absorption plugging and hole sealing device for coal bed gas extraction drill hole |
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| US4756367A (en) * | 1987-04-28 | 1988-07-12 | Amoco Corporation | Method for producing natural gas from a coal seam |
| CN2913612Y (en) * | 2005-05-09 | 2007-06-20 | 柴兆喜 | Well bore enclosed type coal bed air extraction well |
| CN103883348A (en) * | 2014-04-02 | 2014-06-25 | 淮北矿业（集团）勘探工程有限责任公司 | Method for welding well ground pipeline for gas extraction in mining area |
| CN104329114A (en) * | 2014-09-16 | 2015-02-04 | 太原理工大学 | Underground drilling intermittent gas extraction method |
| CN204436342U (en) * | 2015-02-02 | 2015-07-01 | 陕西龙门天地油气技术有限公司 | Coal bed gas negative pressure on ground drainage device |
| CN105114038A (en) * | 2015-08-04 | 2015-12-02 | 太原理工大学 | System and method for increasing drainage quantity of coal bed gas of ground well drainage goaf |
-
2017
- 2017-02-25 CN CN201710105233.1A patent/CN106761584A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4756367A (en) * | 1987-04-28 | 1988-07-12 | Amoco Corporation | Method for producing natural gas from a coal seam |
| CN2913612Y (en) * | 2005-05-09 | 2007-06-20 | 柴兆喜 | Well bore enclosed type coal bed air extraction well |
| CN103883348A (en) * | 2014-04-02 | 2014-06-25 | 淮北矿业（集团）勘探工程有限责任公司 | Method for welding well ground pipeline for gas extraction in mining area |
| CN104329114A (en) * | 2014-09-16 | 2015-02-04 | 太原理工大学 | Underground drilling intermittent gas extraction method |
| CN204436342U (en) * | 2015-02-02 | 2015-07-01 | 陕西龙门天地油气技术有限公司 | Coal bed gas negative pressure on ground drainage device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762554B (en) * | 2017-09-15 | 2019-03-19 | 徐州工程学院 | A kind of system that old abandoned mine places discarded concrete and sequestration of carbon dioxide |
| CN107762554A (en) * | 2017-09-15 | 2018-03-06 | 徐州工程学院 | The system that a kind of old abandoned mine places discarded concrete and sequestration of carbon dioxide |
| CN110939407A (en) * | 2018-09-25 | 2020-03-31 | 山西省煤炭地质勘查研究院 | Double-deck overlapping goaf ground drainage well structure and recovery unit |
| CN109209474A (en) * | 2018-09-27 | 2019-01-15 | 太原理工大学 | A kind of method that dual-lateral well extracts lower coal seam and top more goaf gas and ponding |
| CN109209474B (en) * | 2018-09-27 | 2020-07-28 | 太原理工大学 | Method for extracting gas and accumulated water from coal seam and upper multi-goaf by double branch well |
| CN110409360A (en) * | 2019-06-20 | 2019-11-05 | 中国矿业大学 | A kind of hole bottom water library built by separate periods method based on interior row's opencut intermediate axle |
| CN110409359A (en) * | 2019-06-20 | 2019-11-05 | 中国矿业大学 | Row outdoor pit bottom water library is segmented building method in a kind of |
| CN110409360B (en) * | 2019-06-20 | 2021-01-15 | 中国矿业大学 | Pit bottom reservoir staged construction method based on intermediate bridge of inner-discharging strip mine |
| CN110409359B (en) * | 2019-06-20 | 2021-01-15 | 中国矿业大学 | Segmented construction method for bottom reservoir of inner-drainage open pit |
| CN110748377A (en) * | 2019-11-28 | 2020-02-04 | 中节能宁夏新能源股份有限公司 | Method and device for double extraction of gas and water in abandoned mine |
| CN110748377B (en) * | 2019-11-28 | 2021-12-03 | 中节能宁夏新能源股份有限公司 | Gas and water double-extraction device in abandoned mine |
| CN114151038A (en) * | 2021-12-09 | 2022-03-08 | 太原理工大学 | Automatic water absorption plugging and hole sealing device for coal bed gas extraction drill hole |
| CN114151038B (en) * | 2021-12-09 | 2023-07-18 | 太原理工大学 | Automatic water-absorbing, plugging and hole-sealing device for coal bed gas extraction drilling |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170531 |