CN108708702A - A kind of device and method of low porosity coal seam alternation intensification flooding anatonosis wetting - Google Patents
A kind of device and method of low porosity coal seam alternation intensification flooding anatonosis wetting Download PDFInfo
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- CN108708702A CN108708702A CN201810314715.2A CN201810314715A CN108708702A CN 108708702 A CN108708702 A CN 108708702A CN 201810314715 A CN201810314715 A CN 201810314715A CN 108708702 A CN108708702 A CN 108708702A
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- 239000003245 coal Substances 0.000 title claims abstract description 93
- 238000009736 wetting Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 257
- 238000002347 injection Methods 0.000 claims abstract description 92
- 239000007924 injection Substances 0.000 claims abstract description 92
- 238000005553 drilling Methods 0.000 claims abstract description 36
- 238000001802 infusion Methods 0.000 claims abstract description 32
- 238000005065 mining Methods 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims abstract description 8
- 230000001629 suppression Effects 0.000 claims abstract description 8
- 230000003628 erosive effect Effects 0.000 claims abstract description 7
- 230000003068 static effect Effects 0.000 claims description 7
- 230000002459 sustained effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 241001580947 Adscita statices Species 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 abstract description 3
- 238000009527 percussion Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 206010003694 Atrophy Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000037444 atrophy Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000002113 chemopreventative effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of device and method of low porosity coal seam alternation intensification flooding anatonosis wetting, the device includes dynamical pressure water infusion device, high pressure water injection sebific duct, current divider and water injecting drilling, and dynamical pressure water infusion device includes water tank, water injecting pump, motor, water filling frequency converter and water outlet and is sequentially connected；Shut-off valve is equipped between water outlet and high pressure water injection sebific duct, high pressure water injection sebific duct is connected by current divider with water injecting drilling.It constructs in the subterranean zone for being not affected by mining influence and several water injecting drillings and carries out stringing, sealing of hole；Dynamical pressure water infusion device is passed through into high pressure water injection sebific duct, the one or more water injecting drillings of current divider connection, carry out coal seam alternation intensification flooding anatonosis wetting, under the percussion of height alternative cycle hydraulic pressure, coal body will generate apparent fatigue damage, increase hole, the crack of alternation intensification flooding coal body, and then pressure water is made to be penetrated into matrix of coal along fracture pore, it is finally reached the purpose for improving coal-bed flooding wetting dust suppression erosion control effect.
Description
Technical field
The present invention relates to coal face diaster prevention and control fields, and in particular to a kind of low porosity coal seam alternation is strengthened
The device and method of water filling anatonosis wetting.
Background technology
China is the country using coal as main energy sources, and ratio of the coal in China's production of energy and consumption accounts for according to statistics
70% or more.Currently, as a whole, coal resources in China standby is insufficient, old mining area coal resources start gradually atrophy, with
The progress of the development and human society of science and technology, the demand to the energy is also more urgent, the depth and difficulty of coal mining
More and more prominent, various countries mine is all gradually transferred to the deep mining stage.After mine enters deep mining, compared with superficial part mining environment,
The problems such as low porosity, high-ground stress, High-geotemperature, high karst water pressure and high methane pressure that deep mining is brought, in addition I
State's coal seam permeability is generally relatively low, so that the things such as Rock Burst, coal-dust explosion, coal and gas prominent, spontaneous fire
Therefore the extent of injury upgrades, and serious threat and injury are caused to Safety of Coal Mine Production.
Coal-bed flooding is to be injected pressure water in coal seam by drilling, so that coal seam is soaked in advance, increases the water of coal body
Point.The generation of coal dust when can effectively reduce coal mining by coal-bed flooding；Eliminate or reduce coal seam outburst danger, prevent coal with
The generation of gas burst accident；The balance of original coal-gas system in coal body is destroyed, the gas in working face return is reduced
Concentration；The stress concentration degree for reducing coal body, prevents bump；Increase coal body thermal coefficient and thermal capacity, reduces coal body temperature
Degree prevents Period of Coal Seam Spontaneous Combustion.Coal-bed flooding has application in the multiple mining areas in China, but since the more mining area coal seam in China is low
Porosity, low-permeability coal seam, coal body joint fissure agensis and more hard, it is difficult to penetrate into low porosity coal seam.And
Existing water-filling method is more based on static pressure water filling or constant dynamical pressure water infusion, cannot effectively facilitate the crack in low porosity coal seam
Pores'growth increases coal seam permeability energy, causes effective water injection rate in coal seam less, and coal-bed flooding application effect is generally poor,
Expected diaster prevention and control effect cannot be reached.
Invention content
The problems such as difficult for low porosity low-permeability coal-bed flooding, the present invention provides a kind of friendships of low porosity coal seam
The device for becoming intensification flooding anatonosis wetting carries out water filling using water filling frequency converter to the subterranean zone for being not affected by mining influence；This
The another object of invention is to provide a kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting, and proposition is followed using alternation
Ring hydraulic blow acts on, and water filling coal body is caused to generate fatigue damage, forces low porosity coal body hole crack propagation, perforation, carries
High coal seam permeability increases coal-bed flooding amount, soaks coal seam to form alternation intensification flooding anatonosis, improves coal-bed flooding dust suppression
Erosion control effect.
The present invention uses technical solution below：
A kind of device of low porosity coal seam alternation intensification flooding anatonosis wetting, including dynamical pressure water infusion device, high pressure water injection
Sebific duct, current divider and water injecting drilling, the dynamical pressure water infusion device include water tank, water injecting pump, motor, water filling frequency converter and water outlet
End, and be sequentially connected；The water injecting drilling includes water injection valve, sealing of hole sections and the water injection pipe for being provided with water injection hole；The water outlet with
Shut-off valve is equipped between the high pressure water injection sebific duct, high pressure water injection sebific duct is connected by current divider with water injecting drilling.
Preferably, filter is equipped between the water tank and the water injecting pump.
A kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting, in the subterranean zone for being not affected by mining influence
It constructs and several water injecting drillings and carries out stringing, sealing of hole；Dynamical pressure water infusion device is passed through into high pressure water injection sebific duct, current divider connection one
A or multiple water injecting drillings carry out coal seam alternation intensification flooding anatonosis wetting.The dynamical pressure water infusion device includes water tank, water filling
Pump, motor, water filling frequency converter and water outlet.
Preferably, the water injecting drilling laid in the subterranean zone for being not affected by mining influence uses dynamical pressure water infusion device, adopts
With the alternation intensification flooding anatonosis humidity method of water filling frequency converter, low porosity coal body hole crack propagation, perforation are forced.It improves
Coal seam permeability increases coal-bed flooding amount.
A kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting, includes the following steps：
A. static pressure water filling：Underground dust-proof water lines and one or more water injecting drillings are connected using high pressure water injection sebific duct
It connects, opens water injection valve, carry out water injecting drilling static pressure water filling pressure testing, the connection of detection water injecting pipeline and water injecting drilling sealing of hole leakproofness
Energy；
B. water injection valve is closed, former static pressure water injecting pipeline is connected to the water outlet of dynamical pressure water infusion device；
C. water injection valve is opened, dynamical pressure water infusion device is opened；
D. water filling frequency converter is adjusted, control dynamical pressure water infusion pressure reaches minimum water injection pressure Pmin, keep the water injection pressure steady
It is fixed, maintain 10~20min；
E. water filling frequency converter is adjusted, dynamical pressure water infusion pressure is gradually turned up with certain barometric gradient until maximum water filling pressure
Power Pmax, with stable water injection pressure Pmax0~30min of sustained water injection；
F. water filling frequency converter is adjusted, dynamical pressure water infusion pressure is gradually turned down with certain barometric gradient to minimum water injection pressure
Pmin, with stable water injection pressure Pmin10~20min of sustained water injection completes a coal seam alternation intensification flooding period；
G. step d, e, f are repeated, until reaching rational water injection rate and water filling dust suppression erosion control effect.
Preferably, the minimum water injection pressure PminIt is the 20% of working face coal body compression strength.The minimum water injection pressure
PminDepending on coal seam actual conditions and coal mass strength.
Preferably, the maximum water injection pressure PmaxIt is the 80% of working face coal body compression strength.The maximum water injection pressure
PmaxDepending on coal seam actual conditions and coal mass strength.
Preferably, according to maximum water injection pressure PmaxWater injection time and pressure lifting regulating gradient difference, alternation hydraulic pressure
Effect waveform is divided into trapezoidal wave, triangular wave and rectangular wave.Under the percussion of height alternative cycle hydraulic pressure, coal body will generate
Apparent fatigue damage, increases hole, the crack of alternation intensification flooding coal body, and then pressure water is made to penetrate into coal along fracture pore
In matrix, it is finally reached the purpose for improving coal-bed flooding wetting dust suppression erosion control effect.
The invention has the advantages that：
So that the initial fissure in coal seam constantly penetrated through, extended, and forms new crack inside coal seam in a certain range
Net greatly increases coal body porosity and permeability, to improve coal seam infusion effect, realizes coal-bed flooding wetting dust suppression, weak
Diaster prevention and control effect of chemoprevention punching.
Description of the drawings
Fig. 1 is low porosity coal seam alternation intensification flooding schematic diagram.
Fig. 2 is that three kinds of alternation hydraulic pressure act on oscillogram.
Wherein, 1 is water injection hole；2 be water injection pipe；3 be sealing of hole sections；4 be water injection valve；5 be water meter；6 be water injecting drilling pressure
Table；7 be water injecting drilling shut-off valve；8 be high pressure water injection sebific duct；9 be current divider；10 be shut-off valve；11 be water filling frequency converter；12 are
Motor；13 be pressure gauge；14 be water injecting pump；15 be filter；16 be water tank；17 be coal working face.
In Fig. 2：A is rectangular wave；B is trapezoidal wave；C is triangular wave；PmaxFor maximum water injection pressure；PminFor minimum water filling
Pressure；Δ T is alternation water injection cycle；Δt1For 0~30min；Δt2For 10~20min.
Specific implementation mode
The present invention is specifically described below in conjunction with the accompanying drawings：
In conjunction with Fig. 1, the device of alternation intensification flooding anatonosis wetting, including dynamical pressure water infusion dress are carried out to low porosity coal seam
It sets, high pressure water injection sebific duct 8, current divider 9 and water injecting drilling, dynamical pressure water infusion device include water tank 16, water injecting pump 14, motor 12, note
Water frequency converter 11 and water outlet, and be sequentially connected；Water injecting drilling includes water injection valve 4, sealing of hole sections 3 and the water filling for being provided with water injection hole 1
Pipe 2；Shut-off valve 10 is equipped between water outlet and high pressure water injection sebific duct 8, high pressure water injection sebific duct 8 passes through current divider 9 and water injecting drilling phase
Even.
Wherein, filter 15 is equipped between water tank 16 and water injecting pump 14；Pressure gauge 13 is equipped between motor 12 and water injecting pump 14；Note
Water meter 5, water injecting drilling pressure gauge 6 and water injecting drilling shut-off valve 7 are equipped between water valve 4 and current divider 9 successively.
Show that the subterranean zone that mining influence is not affected by coal working face carries out the work of alternation intensification flooding in Fig. 1
Schematic diagram.
Be not affected by coal working face mining influence subterranean zone construct several water injecting drillings and carry out stringing, envelope
Hole；By dynamical pressure water infusion device by high pressure water injection sebific duct, the one or more water injecting drillings of current divider connection, it is strong to carry out coal seam alternation
Change water filling anatonosis wetting.Wherein, dynamical pressure water infusion device includes water tank, water injecting pump, motor, water filling frequency converter and water outlet.
Wherein, the water injecting drilling laid uses dynamical pressure water infusion device, is increased using the alternation intensification flooding of water filling frequency converter
Humidity method is oozed, low porosity coal body hole crack propagation, perforation are forced.Coal seam permeability is improved, coal-bed flooding amount is increased.
It is using high pressure water injection sebific duct 8 that underground is dust-proof with water lines and one or more before formal beginning alternation intensification flooding
A water injecting drilling connection, opens water injection valve 4, carries out water injecting drilling static pressure water filling pressure testing, and the connection of detection water injecting pipeline and water filling are bored
Hole sealing of hole sealing performance.
If check feature is good, water injection valve 4 is closed, former static pressure water injecting pipeline is connected to the water outlet of dynamical pressure water infusion device
End.
Water injection valve 4 is opened, dynamical pressure water infusion device is opened, carries out alternation intensification flooding anatonosis wetting.
Alternation intensification flooding anatonosis wetting is as follows：
(1) water in water tank 16 is inhaled into water injecting pump 14 after filter 15, using motor 12 as power source, adjusts
The frequency of water filling frequency converter 11 makes dynamical pressure water infusion pressure reach minimum water injection pressure PminIt is (strong according to coal seam actual conditions and coal body
Depending on degree, the 20% of compressive strength for surface contact is about worked), it keeps water injection pressure to stablize, maintains 10~20min of water injection time.
(2) water filling frequency converter 11 is adjusted, water injection pressure is gradually turned up according to certain barometric gradient to maximum water filling pressure
Power Pmax(depending on coal seam actual conditions and coal mass strength, about the 80% of working face coal body compression strength), with the stabilization pressure
Insist on continuous 0~30min of sustained water injection.Water after pressurization pass through successively water filling frequency converter 11, high pressure water injection sebific duct 8, current divider 9,
Water injecting drilling pressure gauge 6 and water meter 5 flow into water injection pipe 2, then are entered in coal seam by water injection hole 1.
(3) water filling frequency converter 11 is adjusted, water injection pressure is made gradually to be turned down to minimum water injection pressure with certain barometric gradient
Pmin, and with stable 10~20min of water injection pressure sustained water injection.
Step (1) to (3) just completes a coal seam alternation intensification flooding period, so repeatedly step (1) to (3), to
Coal working face be not affected by mining influence region formed alternation intensification flooding anatonosis wetting, until reach rational water injection rate and
Until water filling dust suppression erosion control effect.
According to maximum water injection pressure PmaxWater injection time and pressure lifting regulating gradient difference, alternation hydraulic pressure act on wave
Different waveforms may be used in shape.
Embodiment 1
It is rectangular wave that alternation hydraulic pressure, which acts on waveform, referring to shown in Fig. 2 (A).PmaxFor maximum water injection pressure；PminIt is noted for minimum
Water pressure；Δ T is alternation water injection cycle；Δt1For 0~30min；Δt2For 10~20min.
Embodiment 2
It is trapezoidal wave that alternation hydraulic pressure, which acts on waveform, referring to shown in Fig. 2 (B).PmaxFor maximum water injection pressure；PminIt is noted for minimum
Water pressure；Δ T is alternation water injection cycle；Δt1For 0~30min；Δt2For 10~20min.
Embodiment 3
It is triangular wave that alternation hydraulic pressure, which acts on waveform, referring to shown in Fig. 2 (C).PmaxFor maximum water injection pressure；PminFor minimum
Water injection pressure；Δ T is alternation water injection cycle；Δt1For 0~30min；Δt2For 10~20min.
Under the percussion of height alternative cycle hydraulic pressure, coal body will generate apparent fatigue damage, increase alternation and strengthen note
The hole of water coal body, crack, and then pressure water is made to be penetrated into matrix of coal along fracture pore, it is finally reached raising coal-bed flooding
Soak the purpose of dust suppression erosion control effect.
Certainly, above description is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention should also belong to the present invention's
Protection domain.
Claims (8)
1. a kind of device of low porosity coal seam alternation intensification flooding anatonosis wetting, which is characterized in that including dynamical pressure water infusion device,
High pressure water injection sebific duct, current divider and water injecting drilling, the dynamical pressure water infusion device include water tank, water injecting pump, motor, water filling frequency converter
And water outlet, and be sequentially connected；The water injecting drilling includes water injection valve, sealing of hole sections and the water injection pipe for being provided with water injection hole；It is described go out
Shut-off valve is equipped between water end (W.E.) and the high pressure water injection sebific duct, high pressure water injection sebific duct is connected by current divider with water injecting drilling.
2. a kind of device of low porosity coal seam alternation intensification flooding anatonosis wetting according to claim 1, feature exist
In equipped with filter between the water tank and the water injecting pump.
3. a kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting, which is characterized in that be not affected by mining influence
Subterranean zone construct and several water injecting drillings and carry out stringing, sealing of hole；By dynamical pressure water infusion device by high pressure water injection sebific duct, point
The one or more water injecting drillings of device connection are flowed, coal seam alternation intensification flooding anatonosis wetting is carried out.
4. a kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting according to claim 3, feature exist
In in the water injecting drilling that the subterranean zone for being not affected by mining influence is laid using dynamical pressure water infusion device, using water filling frequency converter
Alternation intensification flooding anatonosis humidity method, force low porosity coal body hole crack propagation, perforation.
5. a kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting according to claim 3 or 4, feature
It is, includes the following steps：
A. static pressure water filling：The dust-proof use water lines in underground are connect with one or more water injecting drillings using high pressure water injection sebific duct, are beaten
Water injection valve is opened, water injecting drilling static pressure water filling pressure testing, the connection of detection water injecting pipeline and water injecting drilling sealing of hole sealing performance are carried out；
B. water injection valve is closed, former static pressure water injecting pipeline is connected to the water outlet of dynamical pressure water infusion device；
C. water injection valve is opened, dynamical pressure water infusion device is opened；
D. water filling frequency converter is adjusted, control dynamical pressure water infusion pressure reaches minimum water injection pressure Pmin, the water injection pressure is kept to stablize,
Maintain 10~20min；
E. water filling frequency converter is adjusted, dynamical pressure water infusion pressure is gradually turned up with certain barometric gradient until maximum water injection pressure
Pmax, with stable 0~30min of water injection pressure Pmax sustained water injections；
F. water filling frequency converter is adjusted, dynamical pressure water infusion pressure is gradually turned down with certain barometric gradient to minimum water injection pressure
Pmin completes a coal seam alternation intensification flooding period with stable water injection pressure Pmin 10~20min of sustained water injection；
G. step d, e, f are repeated, until reaching rational water injection rate and water filling dust suppression erosion control effect.
6. a kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting according to claim 5, feature exist
In the minimum water injection pressure Pmin is the 20% of working face coal body compression strength.
7. a kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting according to claim 5, feature exist
In the maximum water injection pressure Pmax is the 80% of working face coal body compression strength.
8. a kind of method of low porosity coal seam alternation intensification flooding anatonosis wetting according to claim 5, feature exist
In the difference of water injection time and pressure lifting regulating gradient according to maximum water injection pressure Pmax, alternation hydraulic pressure acts on waveform point
For trapezoidal wave, triangular wave and rectangular wave.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810314715.2A CN108708702A (en) | 2018-04-10 | 2018-04-10 | A kind of device and method of low porosity coal seam alternation intensification flooding anatonosis wetting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810314715.2A CN108708702A (en) | 2018-04-10 | 2018-04-10 | A kind of device and method of low porosity coal seam alternation intensification flooding anatonosis wetting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646584A (en) * | 2019-10-09 | 2020-01-03 | 中煤科工集团重庆研究院有限公司 | Similar simulation method and device for coal seam water injection hole sealing test |
| CN113565455A (en) * | 2021-07-26 | 2021-10-29 | 中煤科工集团沈阳研究院有限公司 | Coal face porous synchronous water injection dust fall accurate control system and water injection method |
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| US6450256B2 (en) * | 1998-06-23 | 2002-09-17 | The University Of Wyoming Research Corporation | Enhanced coalbed gas production system |
| CN102322285A (en) * | 2011-06-17 | 2012-01-18 | 山东科技大学 | Coal seam water infusion device with high ground pressure, low porosity and low permeability and using process thereof |
| CN204877529U (en) * | 2015-06-18 | 2015-12-16 | 山东科技大学 | Coal seam infusion unites scour protection dust keeper with release big gun |
| CN105422164A (en) * | 2015-12-14 | 2016-03-23 | 河南理工大学 | Efficient water injection method and device of hydraulic fracture permeability increase auxiliary coal seam |
| CN205778987U (en) * | 2016-07-01 | 2016-12-07 | 山东唐口煤业有限公司 | A kind of high-pressure hydraulic fracturing water injection system for coal seams |
| CN107575204A (en) * | 2017-10-26 | 2018-01-12 | 重庆大学 | A kind of underground coal mine slot pressurize is oriented to pressure break anti-reflection method |
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2018
- 2018-04-10 CN CN201810314715.2A patent/CN108708702A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6450256B2 (en) * | 1998-06-23 | 2002-09-17 | The University Of Wyoming Research Corporation | Enhanced coalbed gas production system |
| CN102322285A (en) * | 2011-06-17 | 2012-01-18 | 山东科技大学 | Coal seam water infusion device with high ground pressure, low porosity and low permeability and using process thereof |
| CN204877529U (en) * | 2015-06-18 | 2015-12-16 | 山东科技大学 | Coal seam infusion unites scour protection dust keeper with release big gun |
| CN105422164A (en) * | 2015-12-14 | 2016-03-23 | 河南理工大学 | Efficient water injection method and device of hydraulic fracture permeability increase auxiliary coal seam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646584A (en) * | 2019-10-09 | 2020-01-03 | 中煤科工集团重庆研究院有限公司 | Similar simulation method and device for coal seam water injection hole sealing test |
| CN110646584B (en) * | 2019-10-09 | 2021-09-24 | 中煤科工集团重庆研究院有限公司 | Similar simulation method and device for coal seam water injection hole sealing test |
| CN113565455A (en) * | 2021-07-26 | 2021-10-29 | 中煤科工集团沈阳研究院有限公司 | Coal face porous synchronous water injection dust fall accurate control system and water injection method |
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Application publication date: 20181026 |