CN105736039A - Gas extraction method based on high-pressure hydraulic cave construction on bedding hole of driving working face - Google Patents

Gas extraction method based on high-pressure hydraulic cave construction on bedding hole of driving working face Download PDF

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Publication number
CN105736039A
CN105736039A CN201610067576.9A CN201610067576A CN105736039A CN 105736039 A CN105736039 A CN 105736039A CN 201610067576 A CN201610067576 A CN 201610067576A CN 105736039 A CN105736039 A CN 105736039A
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CN
China
Prior art keywords
coal seam
cave
gas extraction
drilling
construction
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
Application number
CN201610067576.9A
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Chinese (zh)
Inventor
王立武
武国胜
王晓平
蔡亚楠
丁伟平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Tiefulai Equipment Manufacturing Co Ltd
Yangquan Coal Industry Group Co Ltd
Original Assignee
Henan Tiefulai Equipment Manufacturing Co Ltd
Yangquan Coal Industry Group Co Ltd
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Publication date
Application filed by Henan Tiefulai Equipment Manufacturing Co Ltd, Yangquan Coal Industry Group Co Ltd filed Critical Henan Tiefulai Equipment Manufacturing Co Ltd
Priority to CN201610067576.9A priority Critical patent/CN105736039A/en
Publication of CN105736039A publication Critical patent/CN105736039A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/04Directional drilling
    • E21B7/046Directional drilling horizontal drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/18Drilling by liquid or gas jets, with or without entrained pellets

Abstract

The invention discloses a gas extraction method based on high-pressure hydraulic cave construction on a bedding hole of a driving working face. The gas extraction method based on high-pressure hydraulic cave construction on the bedding hole of the driving working face comprises the steps that drilling construction is conducted on the driving working face of a soft high-outburst coal seam, a cave is constructed in the coal seam through a hydraulic jet punching method, a crack extension area is formed around the cave, the permeability of the coal seam is improved, the gas extraction rate is increased, and the drilling construction is horizontal drilling. According to the gas extraction method, a traditional common gas extraction method is abandoned, the traditional cognition limitation of technicians in the field about gas extraction methods is broken, the traditional gas extraction method according to which upward through-stratum drilling extraction or downward through-stratum drilling extraction of a coal seam and horizontal drilling extraction of a driving working face of the coal seam need to be conducted at the same time is converted into the method according to which horizontal drilling extraction only needs to be conducted on the driving working face of the coal seam, and the indispensable upward or downward through-stratum drilling construction which needs to be conducted in traditional cognition is omitted; in addition, potential safety hazards are avoided, the economic cost is greatly reduced, and the gas extraction efficiency is improved.

Description

A kind of driving face concordant hole high-pressure hydraulic makes cave gas pumping method
Technical field
The present invention relates to coal mining field, be specially a kind of driving face concordant hole high pressure water conservancy and make cave gas pumping method.
Background technology
China's coal-bearing strata is many based on Jurassic Period with Permo-carboniferous period, most of coal seams belong to low-permeable weak seam, there is the activities such as many phase protuberances, down warping region, fold and fracture in many mining areas, geological conditions complex under structure extruding and shear stress, there is also partial structurtes to destroy in the harder mining area of Quality of Part Coal and form deformation coal and grow, show as that ature of coal is soft, coal seam permeability is poor, original coal gas extraction difficulty.The many tax with coal seam group condition of China's coal-bearing strata is deposited; extend to deep year by year with the increase of mining rate; after entering deep mining, coal seam all upgrades to high prominent coal seam gradually up and down, loses protective coat extracted condition, and deep high-ground stress and gas pressure cause coal or rock dynamic and Gas Disaster more serious.According to " protrusion-dispelling regulation "; for high methane with projecting coal bed; need to take regional Firedamp precaution measures before exploitation; reduce coal seam gas-bearing capacity and eliminate its outburst hazard; protective coat extracted and to take out coal-bed gas in advance be most economical effective regional gas control measure; the mining area or the mine that do not possess protective coat extracted condition must select base plate or top board rock gangway layer-through drilling to take out the region outburst prevention measures of coal-bed gas in advance, it is ensured that the safety during driving of coal seam.Consider the specific conditions such as the prominent coal seam of the soft height of China generally has that Coal Pore Structure is soft, poor air permeability, gas bearing capacity high pressure big, gas pumping difficulty is big and high methane calamity danger degree is high, easily there is spray orifice, embraces the accidents such as brill, crown drill in layer-through drilling drilling process, after drilling rod exits, boring is difficult to maintain, and collapse hole, plug-hole phenomenon gas pumping weak effect easily occurs;And excavation Di Chou lane consumes substantial amounts of financial resources, material resources, long in time limit, it is unfavorable for coal mining requirement.
When mining, it is necessary to digging laneway is aerated in coal seam, divide coal-face.And in coal seam digging laneway, owing to Di Chou lane gas extraction hole exists collapse hole, plug-hole phenomenon, in coal seam, gas density is difficult to reach minable safe coefficient, during site operation, in order to ensure the safety of headwork surface construction in coal seam, also need to carry out advanced inspecting hole construction, do not dig in coal seam whether have gas pocket in order that verify, this work repeats with Di Chou lane, but must do, if minable degree can be reduced to when coal seam is tunneled for gas density in coal seam by advanced inspecting hole, substantial amounts of people can be saved for colliery, material resources, coal cost of winning can be effectively reduced.State Intellectual Property Office disclosed name and was called the patent of invention of " rock gangway layer-through drilling high-pressure hydraulic makes cave gas pumping method " on April 7th, 2015, the patent No. is 201510162130.X, this patent propose to adopt bore punching press Integration Equipment carry out in the rock gangway in the prominent coal seam of soft height on to or lower to layer-through drilling construction, still needing to mining level boring simultaneously and carry out extraction and the exploitation in coal seam, the production efficiency in coal seam is not had substantial raising by this traditional method.Therefore, entirety, although this traditional method improves the permeability in coal seam, add gas pumping amount, but the Financial cost paid for it is huge, be not appropriate for the needs of modern coal seam exploitation at a high speed.
Summary of the invention
In order to solve the problems referred to above, the purpose of the present invention is to propose to a kind of while meeting colliery exploitation needs at a high speed, eliminate on coal seam to or the lower construction procedure to layer-through drilling, abandon conventional known gas pumping method, break the those skilled in the art's cognitive limitation to gas pumping method, high degree has saved the Financial cost of coal mining, improves efficiency.
The present invention is to solve that the technical scheme that the problems referred to above are taked is: a kind of driving face concordant hole high-pressure hydraulic makes cave gas pumping method, construction drill in the driving face in the prominent coal seam of soft height, and in coal seam, build cave by the method for hydraulic jet punching, crack propagation district is formed around cave, improving coal seam permeability and improve gas pumping efficiency, the boring constructed is horizontal drilling.
Described waterpower is made the anti-reflection coal seam of cave release and is the prominent coal seam of soft height and coal seam is medium-thickness seam.
Described waterpower is made cave process and is repeatedly adopted hydraulic jet hole-punching method to form multiple cave in holing at one.
In coal bed gas extraction method traditionally, many danger and uncertainty is there is due to seam mining, gas pumping construction requirement before exploitation is extremely strict, especially for the medium-thickness seam that soft height is prominent, consideration for construction safety, except needs carry out horizontal drilling extraction construction in this coal bed drift face, to on driving face to or lower carry out layer-through drilling extraction construction to coal seam be also must obligato measure, and on coal seam to or lower to layer-through drilling extraction and the horizontal drilling extraction of coal seam development end construct simultaneously and carry out, so can reduce gas bearing capacity in coal seam to the full extent, guarantee the safety of exploitation construction, this form of construction work is art technology and the universally recognized common-sense construction method of staff;
Additionally, danger and uncertainty due to seam mining, those skilled in the art are difficult to carry out the actual experiment test of other gas pumping methods, so in tradition gas pumping method, those skilled in the art can not when there are major safety risks by experiment in the way of rashly cancel on coal seam to or lower to layer-through drilling extraction construction, therefore for the purpose of safety, in the art, only in coal seam, the gas pumping method of construction level boring never obtained attempting and realizing.
Beneficial effect: for existing issue, the method have the advantages that
First, a kind of driving face concordant hole of the present invention high pressure water conservancy makes cave gas pumping method, abandon traditional known gas pumping method, break those skilled in the art's traditional cognitive to gas pumping method to limit to, by tradition gas pumping method needs on the coal seam simultaneously carried out to or lower to layer-through drilling extraction and coal seam development end horizontal drilling extraction, being converted into only need in coal seam development end horizontal drilling extraction, eliminate traditional cognitive needs carry out and be requisite to or the lower construction to layer-through drilling, and, described method is repeatedly applied in practice of construction, under the premise ensureing normal exploitation, contingent security incident in traditional view does not occur, therefore, the potential safety hazard reality that method described in traditional cognitive exists is only the cognitive limitation of those skilled in the art;
Additionally, described method can be optimized allocation of resources, personnel and equipment can be completely used for by construction in the horizontal drilling construction of coal bed drift face, and then accelerate the construction speed of coal bed drift face, greatly save Financial cost, and, after the gas pumping in coal bed drift face horizontal drilling completes, this horizontal drilling sustainable use carries out the exploitation in coal seam in driving face, avoid in tradition exploitation construction, by the coal seam constructed to or the idle waste of the lower boring brought to layer-through drilling.
Second, a kind of driving face concordant hole of the present invention high pressure water conservancy makes cave gas pumping method, Binding experiment data and practical application effect, contrasts traditional coal seam gas pumping method, has the outstanding advantages of three below aspect:
To construct in coal seam, 100m boring carries out gas pumping for quantitative parameter:
(1) Financial cost
The Financial cost that tradition gas pumping method always need to put into is 6,270,000 yuan,
The Financial cost that existing described gas pumping method always need to put into is 3,060,000 yuan;
(2) extracting result
The gas extraction concentration of existing described gas pumping method is compared tradition gas pumping method and is improve 4.48 times, and gas pumping scale improves 17.3 times, and gas pumping combined amount improves 2.65 times;
(3) work efficiency
The work efficiency of existing described gas pumping method is 2.3 times of tradition gas pumping method.
Accompanying drawing explanation
Fig. 1 is the operating diagram that a kind of driving face concordant of present invention hole high pressure water conservancy makes cave gas pumping method;
Labelling in figure: 1, top board rock gangway, 2, floor roadway, 3, driving face, 4, creep into punching one rig, 5, horizontal drilling.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention being elaborated, the present embodiment, premised on technical solution of the present invention, gives detailed embodiment and concrete operating process.
The present invention makes cave gas pumping method for a kind of driving face concordant hole high-pressure hydraulic, construction drill in the driving face 3 in the prominent coal seam of soft height, and in coal seam, build cave by the method for hydraulic jet punching, crack propagation district is formed around cave, improving coal seam permeability and improve gas pumping efficiency, the boring constructed is horizontal drilling 5.
Described waterpower is made the anti-reflection coal seam of cave release and is the prominent coal seam of soft height and coal seam is medium-thickness seam.
Described waterpower is made cave process and is repeatedly adopted hydraulic jet hole-punching method to form multiple cave in holing at one.
Described method adopts creeps into construction level boring in the prominent coal seam of the punching one rig 4 soft height of horizontal driving face 3 between top board rock gangway 1 and floor roadway 2, and after boring terminates, the method adopting high pressure water conservancy jet punching carries out waterpower and makes cave, cave, multiple space is built in coal seam, and around cave, form crack propagation district by water jets under high pressure pressure break, thus reducing coal body crustal stress, increase uncovering coal plane to amass, improve coal seam permeability, improve gas pumping efficiency and gas pumping amount, and then eliminate mine gas Hidden hazrads.
nullDescribed method construction process is: drill through the boring of one meter in the coal seam of horizontal driving face 3,Orifice blowout prevention device is installed in hole,With flexible pipe, orifice blowout prevention device is connected with coal-water separating device,Ensure that hydraulic flushing in hole is made cave time institute draining slag and can be easily separated,Installation connection being completed is high pressure resistant auger stem、Drill bit and hydraulic jet shower nozzle are inserted in boring after orifice blowout prevention device,And after high pressure resistant auger stem rear end connects chicksan, carry out the boring of level,When the horizontal drilling degree of depth reaches the involved degree of depth,Chicksan is connected with crawler type high-pressure water prmp room,The water under high pressure improved by crawler type high-pressure water prmp room is punched out making cave in horizontal drilling,After forming a cave,Carry out lasting hydraulic jet again,Crack propagation district is formed around cave,Follow-up by hydraulic jet shower nozzle from boring exit certain distance,Again carry out waterpower in the same way and make cave,Until forming multiple cave and crack propagation district.
nullDescribed method compares tradition gas pumping method,Eliminate the layer-through drilling measure in top board rock gangway 1 or floor roadway 2,In driving face 3, only carry out horizontal drilling,This method has abandoned conventional known gas pumping method,Break the those skilled in the art's cognitive limitation to gas pumping method,And analyze through actual repeatedly application and the every data acquisition comparison after practical application,Because eliminating the layer-through drilling measure in top board rock gangway 1 or floor roadway 2, described method does not occur that gas pumping is incomplete、There is the problems such as potential safety hazard,Contrary,Just because of the layer-through drilling measure eliminated in top board rock gangway 1 or floor roadway 2,Limited human and material resources all can be put on the contrary in the construction of horizontal drilling gas pumping,And then accelerate the construction speed of coal bed drift face 3,Greatly save Financial cost,And,After the gas pumping in coal bed drift face horizontal drilling 5 completes,This horizontal drilling 5 sustainable use carries out the exploitation in coal seam in driving face 3.Described method has overturned the traditional cognitive of those skilled in the art, and the extraction for the prominent coal-bed gas of soft height provides brand-new effective approach with administering.
The above, it it is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction, although the present invention describes as above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, without departing within the scope of technical solution of the present invention, the a little change made when available technology contents described above or modification are the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solution of the present invention content, according to any simple modification that above example is made by the technical spirit of the present invention, equivalent variations and modification, all still fall within the scope of technical solution of the present invention.

Claims (3)

1. a driving face concordant hole high-pressure hydraulic makes cave gas pumping method, construction drill in the driving face in the prominent coal seam of soft height, and in coal seam, build cave by the method for hydraulic jet punching, crack propagation district is formed around cave, improve coal seam permeability and improve gas pumping efficiency, it is characterised in that: the boring constructed is horizontal drilling.
2. driving face concordant hole as claimed in claim 1 a kind of high-pressure hydraulic makes cave gas pumping method, it is characterised in that: described waterpower is made the anti-reflection coal seam of cave release and is the prominent coal seam of soft height and coal seam is medium-thickness seam.
3. a kind of driving face concordant hole as claimed in claim 1 high-pressure hydraulic makes cave gas pumping method, it is characterised in that: described waterpower is made cave process and is repeatedly adopted hydraulic jet hole-punching method to form multiple cave in holing at one.
CN201610067576.9A 2016-01-29 2016-01-29 Gas extraction method based on high-pressure hydraulic cave construction on bedding hole of driving working face Pending CN105736039A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107083945A (en) * 2017-06-13 2017-08-22 中铁十九局集团矿业投资有限公司 A kind of roof fracturing system and its implementation
CN107489443A (en) * 2017-08-22 2017-12-19 西南交通大学 Toxic and harmful gas constructing tunnel hydrogen sulfide mash gas harnessing method
CN108979707A (en) * 2018-08-15 2018-12-11 河南铁福来装备制造股份有限公司 A method of cave gas control is made suitable for coal mine Di Chou lane directional drilling
WO2019205516A1 (en) * 2018-04-28 2019-10-31 中国矿业大学 System for extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity
CN111980745A (en) * 2020-08-07 2020-11-24 中煤科工集团西安研究院有限公司 Broken soft low-permeability coal bed gas treatment equipment and method in drilling oriented cave-making permeability-increasing area
CN111119978B (en) * 2019-12-04 2021-12-14 湖南科技大学 Method for extracting coal seam gas by drilling holes in bedding and hydraulically cutting seams
CN114198141A (en) * 2022-02-16 2022-03-18 中煤昔阳能源有限责任公司白羊岭煤矿 Fully-mechanized coal mining face short borehole rapid pressure relief extraction method

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107083945A (en) * 2017-06-13 2017-08-22 中铁十九局集团矿业投资有限公司 A kind of roof fracturing system and its implementation
CN107489443A (en) * 2017-08-22 2017-12-19 西南交通大学 Toxic and harmful gas constructing tunnel hydrogen sulfide mash gas harnessing method
WO2019205516A1 (en) * 2018-04-28 2019-10-31 中国矿业大学 System for extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity
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CN108979707A (en) * 2018-08-15 2018-12-11 河南铁福来装备制造股份有限公司 A method of cave gas control is made suitable for coal mine Di Chou lane directional drilling
CN111119978B (en) * 2019-12-04 2021-12-14 湖南科技大学 Method for extracting coal seam gas by drilling holes in bedding and hydraulically cutting seams
CN111980745A (en) * 2020-08-07 2020-11-24 中煤科工集团西安研究院有限公司 Broken soft low-permeability coal bed gas treatment equipment and method in drilling oriented cave-making permeability-increasing area
CN114198141A (en) * 2022-02-16 2022-03-18 中煤昔阳能源有限责任公司白羊岭煤矿 Fully-mechanized coal mining face short borehole rapid pressure relief extraction method
CN114198141B (en) * 2022-02-16 2022-06-07 中煤昔阳能源有限责任公司白羊岭煤矿 Fully-mechanized coal mining face short borehole rapid pressure relief extraction method

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Application publication date: 20160706