CN104500010B - Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection - Google Patents
Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection Download PDFInfo
- Publication number
- CN104500010B CN104500010B CN201410839124.9A CN201410839124A CN104500010B CN 104500010 B CN104500010 B CN 104500010B CN 201410839124 A CN201410839124 A CN 201410839124A CN 104500010 B CN104500010 B CN 104500010B
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- Prior art keywords
- gas
- water
- pressure
- extraction
- coal seam
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Classifications
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
Abstract
The invention relates to a device and a method for displacing, exhausting and mining coal seam gas by damp and hot water injection. The device comprises a high and low pressure water injection device, a high-pressure-resistant explosion-proof heating device and a gas exhausting and mining device, wherein the high and low pressure water injection device comprises a water storage tank, a water pump motor, a flow meter, a high-pressure water pump and a high-pressure water pipe; the high-pressure-resistant explosion-proof heating device comprises an explosion-proof shell, a heating module, a control circuit board, ceramic asbestos filling and a quick coupler; the gas exhausting and mining device comprises a main pipe for exhausting and mining, an exhausting and mining hose and an exhausting and mining branch pipe. According to the whole device, the purposes of coal seam gas displacement by injection of high-temperature water and superheated water under high or low pressure, coal body temperature and moisture increasing and gas exhausting and mining efficiency improvement can be realized, mine and gas outburst prevention and cure and dust prevention can be integrated, and the device is simple to operate. Especially for a low-permeability coal seam or situations that gas content is high after the coal seam is exhausted and mined for a period of time and the gas is difficult to exhaust and mine, purposes that the gas content of the coal seam of an exhausting and mining area can be quickly lowered and the outburst is eliminated in short time can be realized.
Description
Technical field
The present invention relates to the device and method of a kind of damp and hot displacement in flooding and draining coal seam gas, it is particularly suited for low ventilative
Property coal seam or coal seam extraction for a period of time after gas content remain high situation, can quickly realize reduce extraction region
Coal seam gas-bearing capacity, in the short time, reach extinction purpose.
Background technology
Coal and gas prominent is one of the disaster of most serious in colliery, and coal and gas prominent is unexpected mainly due to crustal stress
Broken coal body, the result of the unexpected release of gas interior energy.Coal body genus polyporus structure fragility object, gas molecule with adsorbed state and
Free state be present among the hole of coal and crack in practice it has proved that, increase with coal body moisture content, the flexibility decrease of coal, plasticity
Strengthen, gas diffusion initial speed △ P declines, and when moisture content reaches more than 4%, coal seam just loses outburst hazard.Therefore, to prominent
It is to improve coal body survivability that coal output layer carries out water filling, reduces gas rate of release, eliminates effectively arranging of coal and gas prominent
Apply.Water mainly plays the role of five aspects to gas in coal seam：1st, displacement effect, coal is to water, carbon dioxide, gas, nitrogen etc.
Material has certain adsorption, but absorbability the strongest be water, next to that carbon dioxide, be gas again, so water
There is to gas displacement effect, high-temperature water accelerates desorption of mash gas, so that displacement efficiency is more improved.2nd, water is made to the dissolving of gas
With test proves, water under elevated pressure conditions, can dissolve part gas；3rd, reduce gas rate of release, with water temperature constantly to
The diffusion of surrounding coal seam, coal temperature declines, and remaining gas pressure reduces, and gas rate of release reduces etc.；4th, increased coal body to mould
Property, improve the ability that coal body opposing destroys suddenly；5th, reduce coal dust to fly upward, after moistening coal body is broken, the bonding because of water is made
With being difficult to fly upward in atmosphere, thus reaching the purpose of depositing dust.
Coal and gas outburst prominent controlling regulation requires：" region outburst prevention measures are preferential, and local outburst prevention measures are supplemented ", region measure
No matter how, all it be unable to do without and enforcement gas pumping of drilling is carried out to coal seam.The projecting coal bed genus hard-pumped that is substantially all puts coal
Layer, the extraction radius of influence is little, and extraction efficiency is low.After coal-bed gas are extracted into a certain degree, both holed in there is no gas or gas
When flow is minimum, part extraction borehole is entered horizontal high voltage note high-temperature water, superheated water operation, due to 1 DEG C of the often rising of temperature, coal seam
Gas adsorption ability just reduces by 8%, therefore, when the temperature increases, absorption energy in the gas molecule on coal body pore wall obtains,
Fast desorption, becomes free gas, in the presence of pressure reduction and seepage flow, accelerates the gas pumping of drainage holes near water injection hole.
Content of the invention
The purpose of the present invention is on the basis of the anti-reflection measure of existing coal-bed flooding release, increased a kind of high pressure resistant anti-
Quick-fried heater, it is achieved that different pressures and different temperatures displacement in flooding coal-bed gas, defines manual pressure and automatically controls
Damp and hot displacement in flooding and the device and method of draining coal seam gas that water temperature is integrated, effect is significant, practical.
For achieving the above object, the invention provides the device of a kind of damp and hot displacement in flooding and draining coal seam gas, it is special
Levy and be：It includes high-low pressure water filling device, high pressure resistant explosion-proof heating device, gas pumping device, described high-low pressure water filling dress
Put the high-pressure hydraulic pump including water storage box, being connected with water storage box, the pump motor of driving high-pressure hydraulic pump, water under high pressure by high-pressure water pipe
Pump is provided with pressure-relief valve, and described high pressure resistant explosion-proof heating device includes the ceramic stone being mutually separated being arranged in explosion-resistant enclosure
Cotton charges and control circuit board, heating module is arranged in described pottery asbestos charges, and described heating module passes through quick
Joint is connected with high-pressure hydraulic pump water side, and the water inlet of heating module is provided with pulse signal effusion meter, and heating module is provided with
Thermometer, this pulse signal effusion meter and thermometer are connected with control circuit board, and control circuit board passes through main power line and power supply
Connect, and control the gear of heating module by controlling cable, gas pumping device includes extraction supervisor, is connected to this extraction master
At least two extraction flexible pipes on pipe and the extraction arm, the water side of described heating module and the institute that stretch in mash gas pumping drilling
The extraction flexible pipe stating gas pumping device is connected with this extraction arm respectively.
Preferably, described high-pressure water pipe is provided with physics effusion meter.
Preferably, described heating module includes casting die block metal-back, is arranged in casting die block metal-back at least
One S type water pipe, heater strip and magnesium oxide for heating casting die block metal-back and water pipe.
Preferably, the junction difference of the water inlet pipe of described explosion-resistant enclosure and heating module, control cable, main power line
It is provided with silica gel sealing ring and screw sealing.
Present invention also offers a kind of method of damp and hot displacement in flooding and draining coal seam gas, using described damp and hot water filling
Displacement and the device of draining coal seam gas, comprise the steps：
A, at least 3 borings or utilize existing 3 mash gas pumping drillings of constructing on rock stratum, through coal seam, connect
High-pressure water pipe, extraction flexible pipe and extraction arm, and blocked mash gas pumping drilling, prepare gas pumping；
B, the water of water storage box are connected with high-pressure hydraulic pump by pressure duct, and through high-pressure hydraulic pump pressurization, pressure-relief valve can be with handss
Dynamic regulation water injection pressure, water under high pressure is entered in high pressure resistant explosion-proof heating device by pressure duct, is entered by heating module
Row heating, control circuit board can adjust heating water temperature, if during anhydrous entrance heating module, it is possible to achieve be automatically stopped heating；
C, the high-temperature water through heating module, superheated water by high-pressure water pipe be connected with extraction arm entrance 1 gas take out
In borehole, high-temperature water, superheated water make coal temperature raise by heat transfer, accelerate the desorbing of gas and migration in coal body, make
The gas being in adsorbed state is rapidly converted into free gas, and the borehole temperature due to hot-water flooding raises, and pressure is of a relatively high, leads to
Excess pressure official post gas pressure flows from high to low, and coal body is more than the absorbability to gas for the coal body to the absorbability of water in addition,
So during injection water, water can enter in the adsorption space of gas, thus replacing the position of gas, reaches displacement gas
Purpose, and then the extraction amount of extraction borehole gas can be improved and reduce extraction region gas bearing capacity, accelerate extinction.
Preferably, after once construction finishes or when stopping injection high-temperature water, superheated water, remove high-low pressure water filling device
With high pressure resistant explosion-proof heating device, boring extraction flexible pipe is heated in water filling extraction supervisor and extraction arm are coupled together, right
When other extraction boreholes are heated, repeat above step.
Advantages of the present invention and beneficial effect：
Due to employing technique scheme, the present invention enables different pressures and different temperatures displacement in flooding coal seam watt
This, whole device can reach real-time implementation height pressure injection high-temperature water, superheated water（Temperature more than 100 DEG C, position liquid under high pressure
Water, enters in lower pressure environment and is changed into vapor）Displacement coal-bed gas, increase coal temperature and humidity, improve gas pumping efficiency,
Realize preventing and treating coal and gas prominent and dust-proof integratedization, simple to operate, taking out especially for low air permeability coal seam or coal seam
Adopt the situation that a period of time after gas content remains high and is difficult to extraction, it is possible to achieve quick reduction extraction regional coal-seam watt
This content, the purpose of short time extinction, can be greatly reduced coal dust simultaneously, ensure workman's production safety.Damp and hot displacement in flooding and
The device pressurization of draining coal seam gas and water temp. auto-control are integrated, and can prevent heating module dry combustion method；Hot water enters
After coal body, not only can be with displacement coal-bed gas, release is anti-reflection coal body, and coal body can be made to heat up, accelerate the desorbing of gas
And migration velocity, change the effect that traditional water filling moistens coal body, define displacement in flooding intensification coal body and accelerate desorbing
The colliery protrusion-dispelling technical measures being integrated with seepage flow.This device and method can effectively reduce gas in extraction borehole region and contain
Measure, be rapidly achieved the purpose of extinction, be a technological innovation for Safety of Coal Mine Production, for control of coalmine gas technology from now on again
Add a new behave.
Brief description
Fig. 1 is the structural representation that the present invention uses.
Fig. 2 is the structural representation of high pressure resistant explosion-proof heating device.
Fig. 3 is heating module internal structure schematic diagram.
In figure：High-low pressure water filling device -1, high pressure resistant explosion-proof heating device -2, gas pumping device -3, water storage box -4, high
Pressure pipe -5, physics effusion meter -6, pump motor -7, high-pressure hydraulic pump -8, extraction supervisor -9, extraction flexible pipe -10, extraction arm -
11, gas -12, mash gas pumping drilling -13, heating module -14, explosion-resistant enclosure -15, ceramic asbestos charges -16, control circuit
Plate -17, pulse signal effusion meter -18, snap joint -19, silica gel sealing ring -20, screw -21, pressure-relief valve -22, control cable -
23, rock stratum -24, coal seam -25, main source line -26, heater strip -27, magnesium oxide -28, casting die block metal-back -29, water pipe -30.
Specific embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described：
As shown in Figure 1：The present invention provides the device and method of a kind of damp and hot displacement in flooding and draining coal seam gas, device
Including high-low pressure water filling device 1, high pressure resistant explosion-proof heating device 2, gas pumping device 3；High-low pressure water filling device 1 can be realized
High-low pressure water free switching, it is possible to achieve water injection pressure 0 ~ 20MPa, including water storage box 4, high-pressure water pipe 5, physics effusion meter 6, water
Pump motor 7, high-pressure hydraulic pump 8；High pressure resistant explosion-proof heating device 2 includes heating module 14, explosion-resistant enclosure 15, ceramic asbestos charges
16th, control circuit board 17, pulse signal effusion meter 18, snap joint 19, silica gel sealing ring 20, screw 21, ceramic asbestos filling
Thing 16 can prevent explosion-resistant enclosure 15 in heating process from heating up, and can ensure that the temperature of heating water is not scattered and disappeared simultaneously.Water under high pressure leads to
Cross snap joint 19, enter 14 pieces of heated mould through pulse signal effusion meter 18, water under high pressure is controlled by control circuit board 17
Temperature, and prevent heating module 14 dry combustion method, it is possible to achieve it is automatically stopped heating, control circuit board 17 passes through to control cable 23 to control
The gear of heating module, realizes different heating power, reaches outlet temperature constant；Gas pumping device 3 is including extraction master
Pipe 9, extraction flexible pipe 10, extraction arm 11, the gas that pumping water into coal is heated with release generation is flowed into by mash gas pumping drilling 13
To in drainage device.
A, at least 3 borings or utilize existing 3 mash gas pumping drillings of constructing on rock stratum, through coal seam, connect
Extraction flexible pipe, high-pressure water pipe and extraction arm, and blocked mash gas pumping drilling, prepare gas pumping.
B, the water of water storage box are connected with high-pressure hydraulic pump by pressure duct, and through high-pressure hydraulic pump pressurization, pressure-relief valve can be with handss
The dynamic pressure adjusting water, the water of release again reflowable to in water storage box, water under high pressure passes through pressure duct and enters into high pressure resistant to prevent
In quick-fried heater, heated by heating module, control circuit board can adjust heating water temperature, if anhydrous entrance heated mould
During block, it is possible to achieve be automatically stopped heating.
C, through the water of heating module be connected with extraction arm by high-pressure water pipe entrance boring in, heating water is passed by heat
Pass and so that coal temperature is raised, accelerate the desorbing of gas and migration in coal body, make the gas being in adsorbed state be rapidly converted into trip
From gas, the borehole temperature due to hot-water flooding raises, and causes gas pressure around of a relatively high, by pressure official post gas pressure
In extraction borehole near flowing into from high to low, coal body is more than the absorbability to gas to the absorbability of water in addition, so
During injection water, water can enter in the adsorption space of gas, thus replacing the position at gas station, reaches the mesh of displacement gas
, and then the extraction amount of extraction borehole gas can be improved and reduce extraction region gas bearing capacity, accelerate extinction.
D, whole device, after a drilling construction finishes or when stopping hot-water flooding, remove high-low pressure water filling device and resistance to
High-voltage explosion-proof heater, is heated boring extraction flexible pipe water filling and is coupled together with extraction supervisor and extraction arm.To other
When extraction borehole is heated, repeat above step, whole process is simple to operate, improve gas pumping effect obvious.
Embodiment of the present invention is only the description that the preferred embodiment of the present invention is carried out, not to the present invention
Spirit and scope are defined, and on the premise of without departing from design philosophy of the present invention, in this area, engineers and technicians are to this
Various modifications and improvement that bright technical scheme is made, all should fall into protection scope of the present invention, the skill that the present invention is claimed
Art content, has all recorded in detail in the claims.
Claims (6)
1. a kind of damp and hot displacement in flooding and draining coal seam gas device it is characterised in that：It includes high-low pressure water filling device
（1）, high pressure resistant explosion-proof heating device（2）, gas pumping device（3）,
Described high-low pressure water filling device（1）Including water storage box（4）, pass through high-pressure water pipe（5）With water storage box（4）The water under high pressure connecting
Pump（8）, drive high-pressure hydraulic pump（8）Pump motor（7）, high-pressure hydraulic pump（8）It is provided with pressure-relief valve（22）,
Described high pressure resistant explosion-proof heating device（2）Including being arranged on explosion-resistant enclosure（15）The ceramic asbestos filling being inside mutually separated
Thing（16）And control circuit board（17）, heating module（14）It is arranged on described pottery asbestos charges（16）Interior, described heated mould
Block（14）By snap joint（19）With high-pressure hydraulic pump（8）Water side connects, heating module（14）Water inlet be provided with pulse
Signal stream gauge（18）, heating module（14）It is provided with thermometer, this pulse signal effusion meter（18）With thermometer and control line
Road plate（17）Connect, control circuit board（17）By main power line（26）It is connected with power supply, and by controlling cable（23）Control
Heating module（14）Gear,
Gas pumping device（3）Including extraction supervisor（9）, be connected to this extraction supervisor（9）On at least two extraction flexible pipes
（10）With stretch into mash gas pumping drilling（13）Interior extraction arm（11）, described heating module（14）Water side and described gas
Drainage device（3）Extraction flexible pipe（10）Respectively with this extraction arm（11）Connect.
2. damp and hot displacement in flooding according to claim 1 and draining coal seam gas device it is characterised in that：Described height
Pressure pipe（5）It is provided with physics effusion meter（6）.
3. damp and hot displacement in flooding according to claim 1 and draining coal seam gas device it is characterised in that：Described adds
Thermal modules（14）Including being arranged on ceramic asbestos charges（16）Interior casting die block metal-back（29）, to be arranged on casting die nugget
Belong to shell（29）At least one interior S type water pipe（30）, be used for heating casting die block metal-back（29）And water pipe（30）Heater strip
（27）And magnesium oxide（28）.
4. damp and hot displacement in flooding according to claim 1 and draining coal seam gas device it is characterised in that：Described is anti-
Quick-fried shell（15）With heating module（14）Water inlet pipe, control cable（23）, main power line（26）Junction be respectively equipped with silicon
Glue sealing ring（20）And screw（21）Sealing.
5. a kind of damp and hot displacement in flooding and draining coal seam gas method it is characterised in that：Using such as the claims 1,2,
3rd, the device of the damp and hot displacement in flooding described in 4 and draining coal seam gas, comprises the steps：
A, in rock stratum（24）Upper construction at least 3 is holed or is utilized existing 3 mash gas pumping drillings（13）, through coal seam
（25）, will wherein 1 mash gas pumping drilling（13）Extraction arm（11）With heating module（14）Water side connect be used as
Water filling heating boring, by other 2 mash gas pumping drillings（13）Extraction arm（11）With extraction flexible pipe（10）Connect, and block
Good each mash gas pumping drilling（13）, prepare gas pumping；
B, water storage box（4）Water pass through pressure duct and high-pressure hydraulic pump（8）It is connected, through high-pressure hydraulic pump（8）Pressurization, pressure-relief valve
（22）Water injection pressure can be adjusted manually, water under high pressure enters into high pressure resistant explosion-proof heating device by pressure duct（2）In, pass through
Heating module（14）Heated, control circuit board（17）Heating water temperature can be adjusted, if anhydrous entrance heating module（14）When,
Can realize being automatically stopped heating；
C, through heating module（14）High-temperature water, superheated water pass through high-pressure water pipe and extraction arm（11）The entrance water filling that is connected adds
In thermic boring, high-temperature water, superheated water make coal temperature raise by heat transfer, accelerate gas in coal body（12）Desorbing and fortune
Move, make the gas being in adsorbed state be rapidly converted into free gas, because temperature raises in water injecting drilling, pressure is relatively
Height, by pressure official post gas（12）Migrate to area of low pressure in high-pressure area, in addition coal body the absorbability of water is more than to watt
This absorbability, so during injection water, water can enter in the adsorption space of gas, thus replacing the position of gas
Put, reach the purpose of displacement gas, and then the extraction amount of extraction borehole gas can be improved and reduce extraction region gas bearing capacity,
Accelerate to reduce coal-bed gas outburst hazard.
6. damp and hot displacement in flooding according to claim 5 and draining coal seam gas method it is characterised in that：Once applying
After work finishes or when stopping injection high-temperature water, superheated water, remove high-low pressure water filling device（1）With high pressure resistant explosion-proof heating device
（2）, boring extraction flexible pipe is heated in water filling（10）Extraction is responsible for（9）With extraction arm（11）Couple together, other is taken out
When borehole is heated, repeat above step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410839124.9A CN104500010B (en) | 2014-12-30 | 2014-12-30 | Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410839124.9A CN104500010B (en) | 2014-12-30 | 2014-12-30 | Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection |
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| Publication Number | Publication Date |
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| CN104500010A CN104500010A (en) | 2015-04-08 |
| CN104500010B true CN104500010B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410839124.9A Expired - Fee Related CN104500010B (en) | 2014-12-30 | 2014-12-30 | Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection |
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| CN104863555B (en) * | 2015-05-18 | 2017-10-20 | 太原理工大学 | A kind of method that coal bed gas extraction amount is heated in raising underground |
| CN105239983B (en) * | 2015-10-15 | 2017-12-08 | 山东科技大学 | A kind of presplitting weakens anti-reflection method with the low air permeability coal seam that high pressure water injection is combined |
| CN106014363B (en) * | 2016-05-18 | 2018-06-15 | 中国矿业大学 | A kind of method for improving coal mine gas extraction efficiency |
| CN107137839A (en) * | 2017-07-10 | 2017-09-08 | 西安森兰科贸有限责任公司 | It is mining from pressurised liquid carbon dioxide fire prevention and extinguishment system |
| CN107701157A (en) * | 2017-09-30 | 2018-02-16 | 太原理工大学 | A kind of device and method of underground heat injection transformation coal seam physical characteristic |
| CN107575263A (en) * | 2017-09-30 | 2018-01-12 | 太原理工大学 | A kind of device of underground heat injection enhanced gas extraction gas |
| CN107975359B (en) * | 2017-11-23 | 2019-12-03 | 山东科技大学 | A kind of anti-disaster method of coal-bed flooding based on seawater corrosion |
| CN109113784B (en) * | 2018-09-20 | 2023-09-15 | 中国矿业大学 | Coal seam gas extraction-water injection coupling device and method |
| CN109296319B (en) * | 2018-11-16 | 2020-01-14 | 河南理工大学 | Gas drainage hole drilling device |
| CN110242346A (en) * | 2019-06-26 | 2019-09-17 | 肥城白庄煤矿有限公司 | For coal seam tomography apparatus, the gas drainage under suction device and method of gas drainage under suction can be parsed |
| CN114320257B (en) * | 2021-12-30 | 2023-11-03 | 中国矿业大学 | Closed loop system and method for enhanced extraction of coal seam after burning of underground coal mine gas |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065295A1 (en) * | 2010-11-15 | 2012-05-24 | 湖南汉寿中煤科技有限公司 | System and method for gas drainage and outburst prevention in coal seam by drill-cut linkage of long drilling hole and high pressure water jet |
| CN102383828B (en) * | 2011-07-08 | 2013-11-20 | 中国矿业大学 | Refection reducing and outburst eliminating method for deep-hole hydraulic fracture driving gas shallow hole extraction |
| CN102518412A (en) * | 2011-12-29 | 2012-06-27 | 郑州大学 | Method for mining coal and gas by hydraulic jet grouting washout |
| CN102979510B (en) * | 2012-12-05 | 2015-06-17 | 中国矿业大学 | Coal seam water injection displacement gas effect simulated experiment system |
| CN103939126A (en) * | 2014-03-31 | 2014-07-23 | 解波 | Coal seam water injection method of coal mining working face |
| CN204386572U (en) * | 2014-12-30 | 2015-06-10 | 湖南省煤炭科学研究院 | The device of a kind of damp and hot displacement in flooding and draining coal seam gas |
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Effective date of registration: 20190530 Address after: 410000 No. 658 Jingwan Road, Yuhua District, Changsha City, Hunan Province Patentee after: Hunan National Standard Testing Technology Co.,Ltd. Address before: 410004 No. 658 Jingwan Road, Yuhua District, Changsha City, Hunan Province Patentee before: HUNAN COAL SCIENCE RESEARCH INSTITUTE |
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