CN109488364A - A kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method - Google Patents

A kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method Download PDF

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Publication number
CN109488364A
CN109488364A CN201811422815.3A CN201811422815A CN109488364A CN 109488364 A CN109488364 A CN 109488364A CN 201811422815 A CN201811422815 A CN 201811422815A CN 109488364 A CN109488364 A CN 109488364A
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CN
China
Prior art keywords
gas
extraction
coal
pressure
slotted liner
Prior art date
Application number
CN201811422815.3A
Other languages
Chinese (zh)
Inventor
林柏泉
赵洋
宋浩然
孔佳
张祥良
张桂韵
Original Assignee
中国矿业大学
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Application filed by 中国矿业大学 filed Critical 中国矿业大学
Priority to CN201811422815.3A priority Critical patent/CN109488364A/en
Publication of CN109488364A publication Critical patent/CN109488364A/en

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Classifications

    • 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
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25Methods for stimulating production
    • E21B43/26Methods for stimulating production by forming crevices or fractures
    • 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

Abstract

A kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method, by in coal seam construction mash gas pumping drilling, the Action of Wind pressure of high pressure blower is combined after the anti-reflection measure of hydraulic slotted liner technique, it carries out reasonable pressure and takes out the extracting result that alternate procedure improves coal-bed gas, prevent coal seam after long-time extraction, coal-bed gas pressure reduces, and causes pressure difference to reduce desorption effect and weakens, and then extracting result is caused to weaken.Constructing hydraulic slotted liner technique measure in extraction borehole can be effectively anti-reflection, by the wind pressure of high pressure blower and extraction, alternately collaboration is carried out, the desorption flowing of coal-bed gas can be effectively improved, and then improves the extracting result of drilling gas, reduces mine coal and gas outburst risk on the whole.

Description

A kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method

Technical field

It is taken out the present invention relates to a kind of hydraulic slotted liner technique with pressure and replaces cooperative reinforcing gas pumping method, be particularly suitable for hypotonic Thoroughly, gas pumping effect and prevention and treatment coal and gas prominent are improved in the coal seam of high methane content.

Background technique

China is larger to energy demand, and wherein coal provides the energy more than 70%, largely has coal and gas prominent The coal seam of risk must adhere to that exploitation is just able to satisfy national product demand.Coal and gas prominent can cause huge personnel to hurt It dies and property loss mainly has to exploit at present and layer and region is protected to take out two in advance to prevent and treat the generation of coal and gas prominent accident The regional anti-burst method of kind, although exploitation protective layer significant effect, is only applicable to part coal seam.Since China coal seam is ventilative Property is generally poor, and permeability is lower, and gas bearing capacity is higher, and common gas drainage technology is difficult to reach preferable gas drainage Effect, extinction effect are undesirable.Research has shown that gas drainage is carried out to coal seam using conventional method, in the extraction long period Afterwards, gas pressure declines, Coal matrix shrinkage, and pressure difference between matrix gas pressure and crack gas pressure reduces, and then causes watt This desorption cannot slowly reach good extracting result.Therefore, protective layer and common coal bed gas extraction technology are being exploited not When can quickly and effectively eliminate coal and gas prominent risk, how dangerous seam with potential region is realized by other feasible methods Protrusion-dispelling is always live urgent problem to be solved.

Summary of the invention

Technical problem: that the object of the present invention is to provide a kind of methods is simple, extracting result is good, can reduce working face coal seam watt The method of the regional prevention and treatment coal and gas prominent of this content,

Technical solution: a kind of hydraulic slotted liner technique of the invention is taken out with pressure replaces cooperative reinforcing gas pumping method, is included in coal The common drilling of interval construction two in layer, one slot drilling of construction between two common drillings, to described two common brills Hole and a slot drilling orifice arrange extraction pipeline, and carry out sealing of hole to drilling, are pooled to extraction pipeline using four-way valve On one pipe, it is connected with a three-way solenoid valve on this pipe for collecting, high pressure blower and pumping are separately connected by three-way solenoid valve Extraction system;The three-way solenoid valve is connected through conducting wire with controller respectively with high pressure blower, and extraction pipeline utilizes valve road phase It connects, the program run of three-way solenoid valve is controlled by controller;When work:

High pressure blower and three-way solenoid valve are opened first with controller, controller controls three-way solenoid valve and opens four-way valve The pipeline of pipeline and extraction system conventionally carries out gas drainage work a period of time;

Then four-way valve pipeline and high pressure blower pipeline are opened using controller control three-way solenoid valve, carries out pressure wind work For a period of time, the desorption of coal gas is promoted to flow;

Alternately gas drainage and wind pressure work repeatedly, carry out enhanced gas extraction to high gassy and low permeability coal seam, until Gas drainage work in coal seam terminates, since high pressure blower and extraction system alternation act on, make gas drainage effect lasts into Row quickly improves the extraction efficiency of coal-bed gas.

Two distances commonly to drill that construction is spaced in the coal seam are 5-20m, and specific spacing distance is according to coal seam property Matter determines.

Described conventionally to carry out extraction to work for a period of time being 5-10min, the specific time becomes according to field condition Change and determines.

Described to carry out pressure wind to work for a period of time being 3-5min to coal seam by high pressure blower, the specific time is according to live feelings Condition variation determines.

The utility model has the advantages that by adopting the above-described technical solution, the present invention utilizes controller control solenoid valve and high pressure blower Automatically switch compressed-air system and extraction system, and then realizes that hydraulic slotted liner technique is taken out with pressure and replace cooperative reinforcing gas drainage.Pass through benefit Enhanced gas extraction, high-pressure blast are carried out to high gassy and low permeability coal seam in conjunction with hydraulic turbulence with convenient and fast mining high-voltage blower Machine and extraction system alternation act on, and carry out gas drainage effect lasts, quickly improve the extraction efficiency of coal-bed gas.Pass through water Power slotting technique can effectively increase coal seam permeability, take out alternately gas pumping method using pressure, can improve conventional extraction side The shortcoming of method.It solves after carrying out the gas drainage long period to coal seam in the prior art, gas pressure decline, matrix of coal It shrinks, the pressure difference reduction between matrix gas pressure and crack gas pressure, and then lead to desorption of mash gas slowly to reach fine Extracting result the problem of.The present invention is from entire coal bed gas extraction Optimized System Design, in extraction borehole construction waterpower Slot measure can be effectively anti-reflection, and by the wind pressure of high pressure blower and extraction, alternately collaboration is carried out, and can effectively improve coal-bed gas Desorption flowing, and then improve the extracting result of drilling gas, it is prominent to reduce coal seam gas-bearing capacity and coal mine gas on the whole Risk out.Its method is simple, easy to operate, wide adaptation range, significant effect.

Detailed description of the invention

Fig. 1, which is hydraulic slotted liner technique, to be taken out with pressure and replaces cooperative reinforcing gas drainage system layout drawing.

In figure: 1- high pressure blower;2- controller;3- extraction system;4- three-way solenoid valve;5- four-way valve;6-a drainage tube; 7-b drainage tube;8-c drainage tube;9-a commonly drills;10-b commonly drills;The drilling of 11- slot.

Specific embodiment

The invention will be further described for embodiment in reference to the accompanying drawing:

Hydraulic slotted liner technique of the invention is taken out with pressure replaces cooperative reinforcing gas pumping method, two a of interval construction in coal seam 9 and b of common drilling commonly drills 10, and spacing distance 5-20m, specific spacing distance is determined according to coal seam property.It is general in two a 9 and b of logical drilling commonly drills one slot drilling 11 of construction between 10, commonly drills 10 to described two a 9 and b that commonly drills Extraction a drainage tube 6, b drainage tube 7 and c drainage tube 8 are arranged with the aperture of a slot drilling 11, and three drillings are sealed A drainage tube 6, b drainage tube 7 and 8 tunnel of c drainage tube are pooled on a pipe, this Guan Shanglian collected by hole using four-way valve 5 It is connected to a three-way solenoid valve 4, high pressure blower 1 and extraction system 3 are separately connected by three-way solenoid valve 4;The electromagnetic three-way Valve 4 is connected through conducting wire with controller 2 respectively with high pressure blower 1, and extraction pipeline is connected with each other using valve road, passes through controller 2 Control the program run of three-way solenoid valve;When work:

High pressure blower 1 and three-way solenoid valve 4 are opened first with controller 2, controller 2 controls electromagnetism according to setting program Triple valve 4 automatically switches extraction system pipeline, controls three-way solenoid valve 4 by controller 2 and opens 5 pipeline of four-way valve and extraction system System 3 pipeline, close 1 pipeline of high pressure blower, conventionally carry out gas drainage work 5-10min, the specific time according to Field condition variation determines;

Then three-way solenoid valve 4 is controlled using controller 2 open 5 pipeline of four-way valve and 1 pipeline of high pressure blower, controller 2 It controls three-way solenoid valve 4 and automatically switches high-pressure blast pipeline, close 3 pipeline of extraction system, pressed by high pressure blower 1 to coal seam Wind work 3-5min, specific time change determination according to field condition;

Alternately gas drainage and wind pressure work repeatedly, promote the desorption of coal gas to flow, low to high methane ventilative Property coal seam carry out enhanced gas extraction, until the gas drainage work in coal seam terminates, since high pressure blower and extraction system alternation are made With, make gas drainage effect lasts carry out, quickly improve the extraction efficiency of coal-bed gas.

Claims (4)

1. a kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method, it is common to be included in interval construction two in coal seam Drilling, one slot drilling (11) of construction between two common drillings, to described two common drillings and a slot drilling Extraction pipeline is arranged in aperture, and carries out sealing of hole to drilling, it is characterised in that: extraction pipeline is pooled to one using four-way valve (5) On item pipe, a three-way solenoid valve (4) are connected on this pipe for collecting, high pressure blower is separately connected by three-way solenoid valve (4) (1) and extraction system (3);The three-way solenoid valve (4) is connected through conducting wire with controller (2) respectively with high pressure blower (1), Extraction pipeline is connected with each other using valve road, and the program run of three-way solenoid valve is controlled by controller (2);When work:
High pressure blower (1) and three-way solenoid valve (4) are opened first with controller (2), controller (2) controls three-way solenoid valve (4) pipeline of four-way valve (5) pipeline and extraction system (3) is opened, gas drainage work a period of time is conventionally carried out;
Then four-way valve (5) pipeline and high pressure blower (1) pipeline are opened using controller (2) control three-way solenoid valve (4), carried out Wind work a period of time is pressed, the desorption of coal gas is promoted to flow;
Alternately gas drainage and wind pressure work repeatedly, carry out enhanced gas extraction to high gassy and low permeability coal seam, until coal seam In gas drainage work terminate, since high pressure blower and extraction system alternation act on, carry out gas drainage effect lasts, fastly Speed improves the extraction efficiency of coal-bed gas.
2. a kind of hydraulic slotted liner technique according to claim 1 is taken out with pressure replaces cooperative reinforcing gas pumping method, feature exists In: two distances commonly to drill that construction is spaced in the coal seam are 5-20m, and specific spacing distance is true according to coal seam property It is fixed.
3. a kind of hydraulic slotted liner technique according to claim 1 is taken out with pressure replaces cooperative reinforcing gas pumping method, feature exists In: described conventionally to carry out extraction to work for a period of time being 5-10min, the specific time changes really according to field condition It is fixed.
4. a kind of hydraulic slotted liner technique according to claim 1 is taken out with pressure replaces cooperative reinforcing gas pumping method, feature exists In: described to carry out pressure wind to work for a period of time being 3-5min to coal seam by high pressure blower (1), the specific time is according to field condition Variation determines.
CN201811422815.3A 2018-11-27 2018-11-27 A kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method CN109488364A (en)

Priority Applications (1)

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CN201811422815.3A CN109488364A (en) 2018-11-27 2018-11-27 A kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method

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Application Number Priority Date Filing Date Title
CN201811422815.3A CN109488364A (en) 2018-11-27 2018-11-27 A kind of hydraulic slotted liner technique is taken out with pressure replaces cooperative reinforcing gas pumping method

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275469A (en) * 2008-05-12 2008-10-01 淮南矿业(集团)有限责任公司 Yolk coal rock formation downward hole pumping and mining pressure relief mash gas construction method
CN202176326U (en) * 2011-07-31 2012-03-28 郑州光力科技股份有限公司 Mine drilling machine and automatic gas and water switching device thereof
CN102704984A (en) * 2012-04-28 2012-10-03 中国矿业大学 Borehole high-concentration gas extraction and drainage method and device thereof
CN103362538A (en) * 2013-07-15 2013-10-23 中国矿业大学 Pressure alternate gas exhausting method by slotting and fracturing coal seams
CN203730058U (en) * 2014-02-21 2014-07-23 淄博安益矿用设备有限公司 Coal-mine gas extraction control system
CN105064967A (en) * 2015-08-10 2015-11-18 中国矿业大学 Coal seam gas fracturing and mash gas driving method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275469A (en) * 2008-05-12 2008-10-01 淮南矿业(集团)有限责任公司 Yolk coal rock formation downward hole pumping and mining pressure relief mash gas construction method
CN202176326U (en) * 2011-07-31 2012-03-28 郑州光力科技股份有限公司 Mine drilling machine and automatic gas and water switching device thereof
CN102704984A (en) * 2012-04-28 2012-10-03 中国矿业大学 Borehole high-concentration gas extraction and drainage method and device thereof
CN103362538A (en) * 2013-07-15 2013-10-23 中国矿业大学 Pressure alternate gas exhausting method by slotting and fracturing coal seams
CN203730058U (en) * 2014-02-21 2014-07-23 淄博安益矿用设备有限公司 Coal-mine gas extraction control system
CN105064967A (en) * 2015-08-10 2015-11-18 中国矿业大学 Coal seam gas fracturing and mash gas driving method

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