EP1711684B1 - Procede pour extraire du grisou dans des zones de roche non directement influencees par l'exploitation miniere - Google Patents

Procede pour extraire du grisou dans des zones de roche non directement influencees par l'exploitation miniere Download PDF

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Publication number
EP1711684B1
EP1711684B1 EP05714885A EP05714885A EP1711684B1 EP 1711684 B1 EP1711684 B1 EP 1711684B1 EP 05714885 A EP05714885 A EP 05714885A EP 05714885 A EP05714885 A EP 05714885A EP 1711684 B1 EP1711684 B1 EP 1711684B1
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EP
European Patent Office
Prior art keywords
mining
boreholes
mine gas
oriented
angle
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.)
Expired - Lifetime
Application number
EP05714885A
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German (de)
English (en)
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EP1711684A1 (fr
Inventor
Udo Adam
Wilhelm Ehrhardt
Joachim Loos
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Individual
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Priority to PL05714885T priority Critical patent/PL1711684T3/pl
Publication of EP1711684A1 publication Critical patent/EP1711684A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
    • 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

Definitions

  • the invention relates to a method for mine gas extraction outside the usual limiting the sink trough influence or influence of mining activities over days and within a critical angle for mine gas circulation in the coal mountains and thus to avoid a greenhouse effect supporting gas release encountered in the wells in the mountain areas and then the mine gas is sucked off.
  • the invention is therefore based on the object to develop and propose a method that makes it possible to gain as much as possible of the mine gas released by mining.
  • the object is achieved according to the invention in that the boreholes are first pushed vertically into the mountains and then selectively deflected and oriented so that considered as a result of the degradation effects in this area or resulting gas circulation paths considered perpendicular to diagonal both in stroke and in the direction of incidence to be pierced.
  • the invention makes it possible, through the orientation of the corresponding boreholes or boreholes, that it utilizes the fact that, although the usual influence or influence angle, which as a rule is between 50 gon and 100 gon, limits the damage to the surface for days, but that the degradation effects also act and asymptotically go to zero, which in particular relates to the gas pathway in the mountains or the resulting gas circulation paths.
  • the subsidence detected or produced in the area of the influence or influence angle is of interest for the process in that it causes inclinations and curvatures and horizontal strains and compressions as well as vertical elongations and compressions.
  • Essential for the circulation of the mine gas and the orientation of the wells for the extraction of the mine gas are mainly the horizontal strains and vertical stretches of the mountains, because these open the fractures and shearing and degradation conditional cracks and scroll the layer surfaces above the degradation advantageous.
  • convex curvatures occur outside or to the side of the excavation, which are an occasion for gas circulation-relevant distortions of the mountains.
  • Strains and strains can be artificially gas trails or Gaszirkulationswege arise that are exploited by the method according to the invention and used for mine gas production, especially between the critical angle for mining action days, ie in the region of the lowering trough and the critical angle for mine gas circulation due reduction or miner's activity.
  • the invention further takes into account that initially above the degradation, gas-circulation-relevant delaminations and, in addition to the degradation, distortions occur.
  • the mine gas is pressed with the fading of the exfoliation to the side in the local Zerrungs Scheme. This range goes far beyond the angle of exposure, which accounts for approximately 99% of subsidence. With this angle of action, 92% of the strains and compressions as well as the curvatures are detected, but they are relevant for the gas circulation paths, which also push the gas into the area outside the influence and influence angle of the degradation.
  • the environmental impact is limited not only to the time during the mining of hard coal, but also to the time thereafter, because the fractures, shear surfaces and cracks remain open as long as there is no degradation below or in the vicinity, in which the circulation paths are pressed.
  • a further advantage is that once the circulation paths for the mine gas widened once more occur more or less vertically and are not pressed by the overlay pressure. This makes it possible for the entire period, using the method according to the invention to suck the environment otherwise polluting mine gas and harness.
  • the boreholes are oriented outside or within the critical angle for mine gas circulation and deflected as horizontally and above the level of degradation.
  • the placement of the wells outside the action or angle of influence of the mining operations has the advantage that the wells can stand long enough to be available for mine gas production. Therefore, they are usually produced within the critical angle for the mine gas circulation, more rarely outside this critical angle. They are first introduced vertically into the ground, then selectively deflected towards degradation and thus reach the area of the gas circulation paths.
  • the boreholes are oriented in horizontal target areas in the direction of excavation or in the opposite direction, the direction essentially depending on where the vertical borehole has been pushed. It is important that in this way the perpendicular and formed by the degradation gas circulation paths are approached and traversed.
  • a further development provides that the bores are deflected in the direction of dismantling and the artificially opened circulation paths are not supported. Undermounting there is a risk that the artificially opened circulation paths are influenced so that they either close completely or change so that the desired gas extraction is no longer possible.
  • Degradation in hard coal mining essentially affects the rock areas above the mining area, so that the invention makes sense to provide for the boreholes to be routed through the ongoing and / or planned mining operations in order to ensure the inward recovery of the gas.
  • the repeatedly mentioned lowering trough or the action or influence angle of the degradation effects is the starting point of the exfoliation, so it is useful if the holes are arranged perpendicular or diagonal to the direction of degradation or are deflected so that they get into this area exactly.
  • the circulation paths are pierced more or less vertically to diagonally in both strike and incidence directions.
  • the individual seams are divided into mining strips. This takes into account the process insofar as the boreholes are oriented in such a way that the division of the excavation surface into several excavation operations / removal strips is taken into account.
  • the boreholes are oriented such that the individual removal strips form a unit or that two or more removal strips form a unit.
  • the invention provides that the exhausted mine gas is supplied to the power supply, which is also optimally possible because relatively pure mine gas can be recovered with high percentages and indeed with well over 50% methane in the methane-air mixture.
  • the invention is characterized in particular by the fact that taking into account the existing conditions not only mine gas is recovered in the area of the mining itself, but also in the neighboring areas, which were previously completely disregarded for mine gas production.
  • environmental pollution can be significantly reduced or even completely avoided, because it is also possible to gain in the areas of mine gas, into which the mine gas due to the degradation effects has been migrated and possibly stored for a long time, which was previously completely disregarded.
  • These areas are up to about 18 gon. It is therefore a much larger area than the recognizable by the sink trough area.
  • the mine gas production possible according to the method serves mercantile purposes but above all also environmental protection. Essential here is the economy achieved, which is achieved in particular by the fact that the holes or holes produced cut through the targeted gas circulation paths and thus allow a win-in of stored there large amounts of gas.
  • FIG. 1 is the coal mountains generally denoted by 1 and an indicated seam with 2. Above this seam 2 and there taking place or occurred degradation is a sink trough 3, which also arise gas circulation-relevant fissures and in addition to the degradation strains. As a result, the mine gas is pressed with the fading of the exfoliation to the side in the local Zerrungs Scheme, ie in the area outside the lowering trough 3. The earth's surface in the region of the lowering trough 4 is thus correspondingly far below the rest of the earth's surface 4 '.
  • the distortion range is well beyond that of the angle of impact, which accounts for 99% of the subsidence. With this angle of action 5, only 92% of the strains and compressions and the curvatures are detected. Added to this are 88% of the compressions and dilations.
  • inventive orientation of the holes 9, 10 for mine gas production between the influence and influence angle 5 and the critical angle 6 for the mine gas circulation as a result of the mining activity is exploited by the invention of the fact that the mountain movements in the form of the degradation of the generally valid law of the lowest energy consumption. After that happens what makes the least amount of energy required.
  • the orientation of the boreholes 9, 10 for mine gas production outside the usual influence angle 5 for the mining damage processing notes that curvatures in the mountains 1 lead to shifts of rock material towards mining. The same happens due to the trend that the mountains 1 migrate in the direction of degradation and indeed decreasing with increasing distance to the degradation, which then leads to strains as in the curvature.
  • the strains are labeled 12, the strains 11.
  • the Kyoto Protocol comes into play, because this mine gas pollutes the environment, which now no longer occurs when using the method according to the invention, because it is obtained in good time and made usable.
  • the environmental relief is not limited only to the time during the mining of hard coal, but extends to a large period thereafter.
  • the strains within the range between angles 5 and 6 point toward disassembly.
  • those fractures, cuttings and cracks that are perpendicular to this direction of strain are artificially opened and important for mine gas circulation and mine gas production.
  • the corresponding orientation of the boreholes 9, 10 uses in the above context that due to the large spatial distance from the initiating degradation, the artificially widened circulation paths are more or less perpendicular. They are not affected by the overlay pressure, so they are fully available for the mine gas recovery steps that are important for economic and environmental protection.
  • the deflected borehole 10 is guided against the degradation direction 8, so that the gas circulation paths are cut more or less perpendicularly to diagonally or pierced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Surgical Instruments (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Earth Drilling (AREA)

Claims (10)

  1. Procédé pour récupérer le gaz de mine à l'extérieur de l'angle d'influence habituel de conséquences de l'extraction en surface, qui délimite la cuvette d'affaissement, et à l'intérieur d'un angle limite pour la circulation de gaz de mine dans le gisement de houille et ainsi limiter une libération de gaz renforçant l'effet de serre, dans lequel des trous de forage sont creusés dans les zones rocheuses et le gaz de mine est ensuite aspiré,
    caractérisé en ce que
    les trous de forage sont d'abord creusés verticalement dans la roche et ensuite déviés et orientés de manière ciblée de façon que les chemins de circulation de gaz apparus ou apparaissant dans cette zone comme conséquences de l'extraction soient perforés perpendiculairement à diagonalement, observé aussi bien dans la direction du filon que dans la direction du pendage.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les trous de forage sont orientés à l'extérieur ou à l'intérieur de l'angle limite pour la circulation de gaz de mine et déviés autant que possible horizontalement et au-dessus du niveau d'abattage.
  3. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les trous de forage sont orientés dans des zones cibles horizontales dans la direction d'abattage ou dans la direction opposée.
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les trous de forage sont déviés dans la direction d'abattage et les chemins de circulation artificiellement ouverts ne sont pas étayés.
  5. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les trous de forage sont dirigés au-dessus de l'abattage en cours et/ou planifié.
  6. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les trous de forage sont disposés perpendiculairement ou diagonalement à la direction d'abattage.
  7. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les trous de forage sont orientés en tenant compte de la répartition de la surface d'abattage en plusieurs chantiers/galeries d'abattage.
  8. Procédé selon la revendication 7,
    caractérisé en ce que
    les trous de forage sont orientés de façon que les différentes galeries d'abattage forment une unité.
  9. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les trous de forage sont orientés de façon que deux ou plusieurs galeries d'abattage forment une unité.
  10. Procédé selon l'une ou plusieurs des revendications précédentes,
    caractérisé en ce que
    le gaz de mine aspiré est utilisé pour la production d'énergie.
EP05714885A 2004-01-23 2005-01-21 Procede pour extraire du grisou dans des zones de roche non directement influencees par l'exploitation miniere Expired - Lifetime EP1711684B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05714885T PL1711684T3 (pl) 2004-01-23 2005-01-21 Sposób wydobywania gazu kopalnianego w strefach górotworu, na które nie ma bezpośredniego wpływu eksploatacja górnicza

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003486A DE102004003486A1 (de) 2004-01-23 2004-01-23 Verfahren zur Gewinnung von Grubengas in nicht unmittelbar durch den Bergbau beeinflussten Gebirgsbereichen
PCT/DE2005/000079 WO2005071226A1 (fr) 2004-01-23 2005-01-21 Procede pour extraire du grisou dans des zones de roche non directement influencees par l'exploitation miniere

Publications (2)

Publication Number Publication Date
EP1711684A1 EP1711684A1 (fr) 2006-10-18
EP1711684B1 true EP1711684B1 (fr) 2008-04-02

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Application Number Title Priority Date Filing Date
EP05714885A Expired - Lifetime EP1711684B1 (fr) 2004-01-23 2005-01-21 Procede pour extraire du grisou dans des zones de roche non directement influencees par l'exploitation miniere

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Country Link
EP (1) EP1711684B1 (fr)
AT (1) ATE391226T1 (fr)
DE (2) DE102004003486A1 (fr)
PL (1) PL1711684T3 (fr)
WO (1) WO2005071226A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101915085B (zh) * 2010-08-13 2011-09-28 山西晋城无烟煤矿业集团有限责任公司 低透气性煤层瓦斯抽采方法
CN102031950B (zh) * 2010-12-06 2012-02-15 煤炭科学研究总院西安研究院 煤层顶板梳状瓦斯抽采钻孔的成孔工艺方法
DE102011102448A1 (de) * 2011-04-08 2012-10-11 Prof. Dr.-Ing. Ehrhardt Wilhelm Verfahren zur Entmethanisierung von Grundwasser
CN106437825A (zh) * 2016-12-05 2017-02-22 山西石泉煤业有限责任公司 一种高瓦斯矿井综放工作面高位钻孔的瓦斯抽采方法
CN111764955A (zh) * 2020-07-21 2020-10-13 中煤科工集团重庆研究院有限公司 基于定向抽采钻孔跨巷道布置的煤巷超前区域预抽方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4303274A (en) * 1980-06-04 1981-12-01 Conoco Inc. Degasification of coal seams
US4544037A (en) * 1984-02-21 1985-10-01 In Situ Technology, Inc. Initiating production of methane from wet coal beds
US4978172A (en) * 1989-10-26 1990-12-18 Resource Enterprises, Inc. Gob methane drainage system

Also Published As

Publication number Publication date
EP1711684A1 (fr) 2006-10-18
DE102004003486A1 (de) 2005-08-11
PL1711684T3 (pl) 2008-09-30
DE502005003556D1 (de) 2008-05-15
ATE391226T1 (de) 2008-04-15
WO2005071226A1 (fr) 2005-08-04

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