CN107083988A - Mining induced fissure band gas pumping technical method based on km directional drilling - Google Patents
Mining induced fissure band gas pumping technical method based on km directional drilling Download PDFInfo
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- CN107083988A CN107083988A CN201710511319.4A CN201710511319A CN107083988A CN 107083988 A CN107083988 A CN 107083988A CN 201710511319 A CN201710511319 A CN 201710511319A CN 107083988 A CN107083988 A CN 107083988A
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- gas
- directional drilling
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
Abstract
A kind of mining induced fissure band gas pumping technical method based on km directional drilling, on analysis coal-face overlying rock cranny development and gas migration regular basis, determine the technical parameters such as layer position, length, quantity, spacing, extraction negative pressure, the extraction time of km directional drilling, then utilize km directional drilling machine in the drill site of return side to some km directional drillings of goaf top crack belt construction, extraction is carried out to the gas in mining induced fissure band, until coal-face back production terminates.This method extracting result is good, construction cost is low, construction period is short, operating efficiency is high, can effectively solve the problem that upper corner and goaf gas accumulation overrun issues.
Description
Art
The present invention relates to a kind of coal mine gas extraction technical method, it is based especially on adopting for km directional drilling and splits
Gap band gas pumping technical method, it is adaptable to which upper corner and goaf gas gather the improvement of overrun issues.
Technical background
Coal is the main body energy of China, and a large amount of exploitations of coal cause coal mining depth to increase year by year, and then cause
Coal-bed gas pressure gradually increases with gas bearing capacity, and gas emission constantly increases.For coal seam group near interval, working face
In recovery process, substantial amounts of crack is formed in roof strata, the next layer gas and this coal seam goaf gas are in roof fracture band
Interior a large amount of accumulations, cause face upper corner angle gas to gather and transfinite, mine safety production are threatened.For this problem,
The solution of most of mines is suction road of being constructed in the fissure zone in mining influence formation at the top of mined bed, makes top plate
Fissure zone gas enters in suction road under extraction suction function along crack, extracts high concentration gas out through extraction pipeline；Or from
Constructed at a certain distance in air way drill site, to work face goaf direction construction top plate high drainage roadway from drill site, intercept top
Plate fissure zone gas pours in stope.
However, suction road long construction period, cost is high, the digging duration is influenceed, it is more next under current coal situation
It is more unsuitable.From drill site to work face goaf direction construction top plate high drainage roadway, drilling only is arranged on crack belt position,
Extracting result is just preferable, but with the propulsion of working face, and nose end progresses into caving zone, and as top plate is across falling to be easily caused
Extraction gas flow is excessive, it is impossible to which extraction high concentration gas is directly blocked ineffective, it is necessary to punch again, is taken time and effort.
Therefore, how efficient extraction is carried out to the gas in mining induced fissure band, ensures the safety in production of stope, be to put at the scene
A difficult problem in face of engineering science and technology personnel.
Goal of the invention
It is an object of the invention to provide a kind of extracting result is good, construction cost is low, construction period is short, operating efficiency is high, energy
The band gas of the mining induced fissure based on km directional drilling of enough effectively solution upper corner and goaf gas accumulation overrun issues is taken out
Adopt technical method.
Technical scheme
The technical proposal for solving the technical problem of the invention is：
A. coal mining geology condition, Oceurence Patterns of Petrographic Facies and coal-face mining conditions are combined, synthesis uses mine pressure
With CONTROL OF STRATA MOVEMENT is theoretical and UDEC discrete element simulation softwares, calculating coal-face overlying rock three with (caving zone, fissure zone and
Warp damage) development height, analyze overlying rock and be caving, be broken and absciss layer feature and its Evolution, determine overlying rock
Middle crack intensive development position and gas rich region；
B. according to coal-face mining conditions and Gas Preservative Law, research coal-face stope gas migration rule
Restrain, layer position, length, quantity, spacing, extraction negative pressure, extraction time of comparative analysis km directional drilling etc., technical parameter was to adopting
The influence of dynamic fissure zone gas migration, the coupling studied between the technical parameter and gas migration rule of km directional drilling is closed
System, primarily determines that the rational technique parameter of km directional drilling；
C. constructed in the return airway nearer apart from exploiting field main entry one 3m × 3m × 3m drill site；
D. utilize km directional drilling machine in drill site to some km directional drillings of goaf top crack belt construction, km
The technical parameters such as layer position, length, quantity, the spacing of directional drilling are determined by step b；
E. gas pumping pipe end is placed in km directional drilling, and carries out sealing of hole, connect gas pumping pipe one end
Km directional drilling is connect, the other end is connected in gas drainage system；
F. the technical parameter such as extraction negative pressure, extraction time according to determined by step b, adjusts the extraction of gas drainage system
Negative pressure, opening conduits valve carries out extraction to the gas in mining induced fissure band, until coal-face back production terminates；
G. the extraction data such as gas extraction flow, concentration of actual measurement km directional drilling, analyze the layer of km directional drilling
The corresponding relation of the technical parameters such as position, length, quantity, spacing, extraction negative pressure, extraction time and gas pumping data, further
Optimization determines the technical parameter of applicable km directional drilling, and in the work of next Cracked Field On Coal Face gas pumping
It is middle to be applied.
Beneficial effects of the present invention：
(1) present invention determines the reasonable of mash gas pumping drilling according to the cranny development rule of coal-face overlying rock
Technical parameter, improves gas pumping rate, can effectively solve the problem that upper corner and goaf gas accumulation overrun issues, and method is simple
Easy, engineering reliability is strong；
(2) present invention is constructed km directional drilling by km directional drilling machine, and the stationkeeping ability of rig is strong, construction cost
Low, construction period is short, and operating efficiency greatly improved.
Brief description of the drawings
Fig. 1 is the technical method floor map of the present invention.
Fig. 2 is the technical method diagrammatic cross-section of the present invention.
In figure, 1- coal-faces, 2- caving zones, 3- fissure zones, 4- warp damages, 5- km directional drillings, 6- is adopted
Area's main entry, 7- return airways, 8- drill sites, 9- goafs, 10- extraction systems, 11- air intake lanes.
Embodiment
1 and 2 pair of implementation of the invention is further analysed description below in conjunction with the accompanying drawings：
The band gas pumping technical method of the mining induced fissure based on km directional drilling of the present invention, including coal-face 1,
Caving zone 2, fissure zone 3, warp damage 4, km directional drilling 5, exploiting field main entry 6, return airway 7, drill site 8, goaf 9, take out
Extraction system 10, air intake lane 11, concrete operation step is as follows：
A. coal mining geology condition, Oceurence Patterns of Petrographic Facies and the mining conditions of coal-face 1 are combined, synthesis uses mine pressure
With CONTROL OF STRATA MOVEMENT theory and UDEC discrete element simulation softwares, the overlying rock three of coal-face 1 is calculated with (caving zone 2, fissure zone
3 and warp damage 4) development height, analysis overlying rock be caving, be broken and absciss layer feature and its Evolution, determine overlying
Crack intensive development position and gas rich region in rock stratum；
B. according to the mining conditions of coal-face 1 and Gas Preservative Law, research coal-face stope gas migration rule
Restrain, layer position, length, quantity, spacing, extraction negative pressure, extraction time of comparative analysis km directional drilling 5 etc., technical parameter was to adopting
The influence of dynamic fissure zone gas migration, the coupling between the technical parameter and gas migration rule of research km directional drilling 5 is closed
System, primarily determines that the rational technique parameter of km directional drilling 5；
C. constructed in the return airway 7 nearer apart from exploiting field main entry 6 one 3m × 3m × 3m drill site 8；
D. constructed some km directional drillings 5 to the top fissure zone 3 of goaf 9 in drill site 8 using km directional drilling machine,
The technical parameters such as layer position, length, quantity, the spacing of km directional drilling 5 are determined by step b；
E. gas pumping pipe end is placed in km directional drilling 5, and carries out sealing of hole, connect gas pumping pipe one end
Km directional drilling 5 is connect, the other end is connected in gas drainage system 10；
F. the technical parameter such as extraction negative pressure, extraction time according to determined by step b, adjusts taking out for gas drainage system 10
Negative pressure is adopted, opening conduits valve carries out extraction to the gas in mining induced fissure band 3, until the back production of coal-face 1 terminates；
G. the extraction data such as gas extraction flow, concentration of actual measurement km directional drilling 5, analyze km directional drilling 5
The corresponding relation of the technical parameters such as layer position, length, quantity, spacing, extraction negative pressure, extraction time and gas pumping data, enters one
Step optimization determines the technical parameter of applicable km directional drilling 5, and in next Cracked Field On Coal Face gas pumping
Applied in work.
Claims (1)
1. a kind of mining induced fissure band gas pumping technical method based on km directional drilling, it is characterised in that：
A. coal mining geology condition, Oceurence Patterns of Petrographic Facies and coal-face mining conditions are combined, it is comprehensive to use mine pressure and rock
Layer control theory and UDEC discrete element simulation softwares, calculate coal-face overlying rock three with (caving zone, fissure zone and bending
Sinking band) development height, analyze overlying rock and be caving, be broken and absciss layer feature and its Evolution, determine to split in overlying rock
Gap intensive development position and gas rich region；
B. according to coal-face mining conditions and Gas Preservative Law, coal-face stope gas migration rule is studied, it is right
The technical parameters such as layer position, length, quantity, spacing, extraction negative pressure, extraction time than analyzing km directional drilling are to mining induced fissure
Influence with gas migration, studies the coupled relation between the technical parameter and gas migration rule of km directional drilling, tentatively
Determine the rational technique parameter of km directional drilling；
C. constructed in the return airway nearer apart from exploiting field main entry one 3m × 3m × 3m drill site；
D. utilize km directional drilling machine in drill site to some km directional drillings of goaf top crack belt construction, km orientation
The technical parameters such as layer position, length, quantity, the spacing of drilling are determined by step b；
E. gas pumping pipe end is placed in km directional drilling, and carries out sealing of hole, gas pumping pipe one end is connected thousand
Rice directional drilling, the other end is connected in gas drainage system；
F. the technical parameter such as extraction negative pressure, extraction time according to determined by step b, the extraction of regulation gas drainage system is born
Pressure, opening conduits valve carries out extraction to the gas in mining induced fissure band, until coal-face back production terminates；
G. the extraction data such as gas extraction flow, concentration of actual measurement km directional drilling, analyze layer position, the length of km directional drilling
The corresponding relation of the technical parameters such as degree, quantity, spacing, extraction negative pressure, extraction time and gas pumping data, further optimization is true
Surely the technical parameter of applicable km directional drilling, and being carried out in the work of next Cracked Field On Coal Face gas pumping
Using.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590653A (en) * | 2018-03-02 | 2018-09-28 | 煤炭科学技术研究院有限公司 | Coal and gas prominent release energy dissipating cooperates with preventing control method with media property transformation |
| CN109488381A (en) * | 2018-12-11 | 2019-03-19 | 太原理工大学 | A kind of method of accurate determining goaf gas extraction best well location and layer position |
| CN109519211A (en) * | 2019-01-15 | 2019-03-26 | 中煤科工集团重庆研究院有限公司 | A method of coal bed gas surface well extraction minery gas is taken out using pre- |
| CN109736876A (en) * | 2018-12-19 | 2019-05-10 | 中煤科工集团重庆研究院有限公司 | It adopts kinetoplast and gushes out gas top plate major diameter directional long borehole pumping method |
| CN109915197A (en) * | 2019-04-11 | 2019-06-21 | 河南理工大学 | A kind of method that rock gangway km directional long borehole substitution middle part bottom pumping rock gangway is taken out at bottom |
| CN110259503A (en) * | 2019-06-14 | 2019-09-20 | 华北理工大学 | A kind of expansion rock stratum high position horizontal bore gas pumping method |
| CN110685734A (en) * | 2019-10-24 | 2020-01-14 | 中煤科工集团西安研究院有限公司 | Panel gas treatment method based on partition step-by-step increasing tree-shaped directional long drilling |
| CN111425245A (en) * | 2020-04-29 | 2020-07-17 | 湖南科技大学 | Coal and gas symbiotic disaster prevention and control method based on goaf air leakage field optimization |
| AU2017404561B2 (en) * | 2017-05-02 | 2020-09-17 | China University Of Mining And Technology | Method for precisely extracting coal-mine gas |
| CN111894656A (en) * | 2020-06-24 | 2020-11-06 | 山西晋煤集团技术研究院有限责任公司 | Method for extracting gas in working face goaf of single thick coal seam by stages and zones |
| CN111963109A (en) * | 2020-07-20 | 2020-11-20 | 西山煤电(集团)有限责任公司钻探分公司 | Multi-branch horizontal well coal mining goaf gas extraction process |
| CN112240221A (en) * | 2020-10-15 | 2021-01-19 | 西安乔木科技技术有限公司 | Gas extraction method based on directional long drill hole |
| CN112377238A (en) * | 2020-08-25 | 2021-02-19 | 山西晋煤集团技术研究院有限责任公司 | One-hole dual-purpose gas extraction drill hole arrangement method |
| CN112593997A (en) * | 2020-12-11 | 2021-04-02 | 山西晋煤集团技术研究院有限责任公司 | Method for extracting gas in goaf through top plate high-position comb-shaped drill hole |
| CN113279808A (en) * | 2021-06-15 | 2021-08-20 | 安徽理工大学 | Intelligent gas extraction system and method based on double-layer directional long drill hole |
| CN113653527A (en) * | 2021-09-17 | 2021-11-16 | 中煤科工集团重庆研究院有限公司 | Method for extracting top coal gas during fully mechanized top coal caving period of extra-thick coal seam |
| CN114382527A (en) * | 2022-01-13 | 2022-04-22 | 中国矿业大学(北京) | Technical method for cooperatively extracting gas from high-position roadway and low-position roadway of high-gas coal seam group |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2017404561B2 (en) * | 2017-05-02 | 2020-09-17 | China University Of Mining And Technology | Method for precisely extracting coal-mine gas |
| CN108590653B (en) * | 2018-03-02 | 2019-09-03 | 煤炭科学技术研究院有限公司 | Coal and gas prominent release energy dissipating cooperates with preventing control method with media property transformation |
| CN108590653A (en) * | 2018-03-02 | 2018-09-28 | 煤炭科学技术研究院有限公司 | Coal and gas prominent release energy dissipating cooperates with preventing control method with media property transformation |
| CN109488381A (en) * | 2018-12-11 | 2019-03-19 | 太原理工大学 | A kind of method of accurate determining goaf gas extraction best well location and layer position |
| CN109736876A (en) * | 2018-12-19 | 2019-05-10 | 中煤科工集团重庆研究院有限公司 | It adopts kinetoplast and gushes out gas top plate major diameter directional long borehole pumping method |
| CN109519211A (en) * | 2019-01-15 | 2019-03-26 | 中煤科工集团重庆研究院有限公司 | A method of coal bed gas surface well extraction minery gas is taken out using pre- |
| CN109915197A (en) * | 2019-04-11 | 2019-06-21 | 河南理工大学 | A kind of method that rock gangway km directional long borehole substitution middle part bottom pumping rock gangway is taken out at bottom |
| CN110259503A (en) * | 2019-06-14 | 2019-09-20 | 华北理工大学 | A kind of expansion rock stratum high position horizontal bore gas pumping method |
| CN110685734B (en) * | 2019-10-24 | 2021-01-29 | 中煤科工集团西安研究院有限公司 | Panel gas treatment method based on partition step-by-step increasing tree-shaped directional long drilling |
| CN110685734A (en) * | 2019-10-24 | 2020-01-14 | 中煤科工集团西安研究院有限公司 | Panel gas treatment method based on partition step-by-step increasing tree-shaped directional long drilling |
| CN111425245A (en) * | 2020-04-29 | 2020-07-17 | 湖南科技大学 | Coal and gas symbiotic disaster prevention and control method based on goaf air leakage field optimization |
| CN111894656A (en) * | 2020-06-24 | 2020-11-06 | 山西晋煤集团技术研究院有限责任公司 | Method for extracting gas in working face goaf of single thick coal seam by stages and zones |
| CN111963109A (en) * | 2020-07-20 | 2020-11-20 | 西山煤电(集团)有限责任公司钻探分公司 | Multi-branch horizontal well coal mining goaf gas extraction process |
| CN112377238A (en) * | 2020-08-25 | 2021-02-19 | 山西晋煤集团技术研究院有限责任公司 | One-hole dual-purpose gas extraction drill hole arrangement method |
| CN112240221A (en) * | 2020-10-15 | 2021-01-19 | 西安乔木科技技术有限公司 | Gas extraction method based on directional long drill hole |
| CN112593997A (en) * | 2020-12-11 | 2021-04-02 | 山西晋煤集团技术研究院有限责任公司 | Method for extracting gas in goaf through top plate high-position comb-shaped drill hole |
| CN113279808A (en) * | 2021-06-15 | 2021-08-20 | 安徽理工大学 | Intelligent gas extraction system and method based on double-layer directional long drill hole |
| CN113279808B (en) * | 2021-06-15 | 2022-04-15 | 安徽理工大学 | Intelligent gas extraction system and method based on double-layer directional long drill hole |
| CN113653527A (en) * | 2021-09-17 | 2021-11-16 | 中煤科工集团重庆研究院有限公司 | Method for extracting top coal gas during fully mechanized top coal caving period of extra-thick coal seam |
| CN114382527A (en) * | 2022-01-13 | 2022-04-22 | 中国矿业大学(北京) | Technical method for cooperatively extracting gas from high-position roadway and low-position roadway of high-gas coal seam group |
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