CN106401640A - Dynamic control method and system for gas extraction of coal face - Google Patents
Dynamic control method and system for gas extraction of coal face Download PDFInfo
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- CN106401640A CN106401640A CN201610796009.7A CN201610796009A CN106401640A CN 106401640 A CN106401640 A CN 106401640A CN 201610796009 A CN201610796009 A CN 201610796009A CN 106401640 A CN106401640 A CN 106401640A
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention discloses a dynamic control method and system for gas extraction of a coal face, and belongs to the technical field of gas extraction of coal mine. Gas extraction information of extraction fields is monitored in real time, specifically, the gas extraction information comprises extraction mixing total flow, gas density and extraction negative pressure, and change of the extraction mixing total flow is judged; if the extraction mixing total flow is increased, the increase speed of the extraction mixing total flow and the increase speed of the gas extraction scalar quantity are worked out and compared, the extraction negative pressure is reduced if the increase speed of the extraction mixing total flow is larger than the increase speed of the gas extraction scalar quantity, the extraction negative pressure is improved if the increase speed of the extraction mixing total flow is smaller than the increase speed of the gas extraction scalar quantity, or a pressure stabilizing mode is started; if the extraction mixing total flow is decreased, the decrease speed of the extraction mixing total flow and the decrease speed of the gas extraction scalar quantity are worked out and compared, the extraction negative pressure is improved if the decrease speed of the extraction mixing total flow is larger than the decrease speed of the gas extraction scalar quantity, the extraction negative pressure is reduced if the decrease speed of the extraction mixing total flow is smaller than the decrease speed of the gas extraction scalar quantity, or the pressure stabilizing mode is started; and if the extraction mixing total flow is not changed, the pressure stabilizing mode is started. When used for controlling, the method and system can take different areas of the coal face and situations of different stages of fracture development of the same area into consideration, and thus the extraction efficiency and quality are optimal.
Description
Technical field
The invention belongs to coal mine gas drainage technical field is and in particular to a kind of coal-face gas pumping dynamic regulation
Method and system.
Background technology
Cracks in coal seam is developed, by increasing capacitance it is possible to increase gas permeability of coal seam, is conducive to increase coal-bed gas to gush out, now properly increases and take out
Adopt negative pressure, can be good at improving gas pumping efficiency.And cracks in coal seam is excessively developed, will result in extraction borehole sealing quality
Decline, greatly increase boring gas leakage, or even cause borehole failure situation, if now extraction negative pressure is excessive, hole inleakage
Drilling gas outburst amount can be much larger than, make gas pumping extremely inefficient, cause the waste of resource.Therefore different for cranny development
Coal seam, need to adjust different extraction negative pressure, to ensure extraction efficiency.
In colliery, using the situation generally existing of " Mining and pumping " gas pumping mode, work surface is normally exploited, in work
The front of face propulsion carries out gas pumping.For in mining face, due to being acted on by mining influence, whole work surface can go out
Existing cracks in coal seam aplasia, cracks in coal seam are developed and cracks in coal seam develops obvious three regions, from stope more close to, crack
More develop.And with the advance of the face, a certain region also can experience crack aplasia, cranny development, obvious three of cranny development
Stage.Thus, it is ensured that the high efficiency of gas pumping, for the zones of different in coal seam, the same area different phase it is necessary to right
Extraction negative pressure enters Mobile state adjustment.
Content of the invention
It is an object of the invention to provide a kind of coal-face gas pumping dynamic regulation method, in order to solve existing coal mining
Work surface control system specific aim is not strong, gas pumping efficiency and problem of low quality.
For solving above-mentioned technical problem, a kind of coal-face gas pumping dynamic regulation method that the present invention provides, can
With the extraction information of each extraction field gas of real-time monitoring, described extraction information include extraction mixing total flow, gas density and
Extraction negative pressure, judges extraction mixing total flow change：
If rising, calculate and compare the extraction mixing total flow rate of climb and the mash gas extraction scale rate of climb, if taking out
Adopt the mixing total flow rate of climb and be more than the mash gas extraction scale rate of climb, then reduce extraction negative pressure；If extraction mixes total flow
The rate of climb is less than the mash gas extraction scale rate of climb, then improve extraction negative pressure；Otherwise start potentiostatic mode；
If reducing, calculate and compare extraction mixing total flow decrease speed and mash gas extraction scale decrease speed, if taking out
Adopt mixing total flow decrease speed and be more than mash gas extraction scale decrease speed, then improve extraction negative pressure；If extraction mixes total flow
Decrease speed is less than mash gas extraction scale decrease speed, then reduce extraction negative pressure；Otherwise start potentiostatic mode；
If constant, start potentiostatic mode.
Further, whether real-time monitoring extraction negative pressure, after entering potentiostatic mode, judge extraction negative pressure in extraction negative pressure threshold
In the range of value, if being more than negative threshold upper limit set value, reduce extraction negative pressure to set point；If being less than lower threshold limit
Setting value, then increase extraction negative pressure to set point；If in the range of negative threshold, keep present situation.
Further, described extraction negative threshold scope is P-1%～P+1%, and P is to control extraction negative pressure.
The present invention also provides a kind of coal-face gas pumping dynamic regulation system, and described system is included for being placed on
Each at least a set of pipeline Gas Signal sensing device that need to carry out the coal-face of gas pumping and the pipeline of corresponding tricks
Pressure regulator valve and gas pumping device for controlling dynamically, and work surface control main frame；Work surface control main frame controls each watt of connection
This extraction device for controlling dynamically, each gas pumping device for controlling dynamically controls the corresponding pipeline pressure regulator valve of connection, and signal connects
Pipeline gas real-time monitoring device；The extraction information of pipeline each extraction field gas of gas real-time monitoring device real-time monitoring, institute
State extraction information and include each extraction mixing total flow, gas density and extraction negative pressure, judge extraction mixing total flow change：
If rising, calculate and compare the extraction mixing total flow rate of climb and the mash gas extraction scale rate of climb, if taking out
Adopt the mixing total flow rate of climb and be more than the mash gas extraction scale rate of climb, then control pressure regulator valve to reduce extraction negative pressure；If extraction
The mixing total flow rate of climb is less than the mash gas extraction scale rate of climb, then control pressure regulator valve to improve extraction negative pressure；Otherwise start
Potentiostatic mode；
If reducing, calculate and compare extraction mixing total flow decrease speed and mash gas extraction scale decrease speed, if taking out
Adopt mixing total flow decrease speed and be more than mash gas extraction scale decrease speed, then control pressure regulator valve to improve extraction negative pressure；If extraction
Mixing total flow decrease speed is less than mash gas extraction scale decrease speed, then control pressure regulator valve to reduce extraction negative pressure；Otherwise start
Potentiostatic mode；
If constant, start potentiostatic mode.
Further, gas real-time monitoring device real-time monitoring extraction negative pressure, after entering potentiostatic mode, gas pumping is dynamic
Control device gathers described extraction negative pressure signal, and judges extraction negative pressure whether in the range of extraction negative threshold, if more than negative
The upper limit set value of pressure threshold range, then control pipeline pressure regulator valve reduction extraction negative pressure is to set point；If being less than negative threshold
The lower limit set value of scope, then control pressure regulator valve to increase extraction negative pressure to set point；If in the range of negative threshold, keep
Present situation.
Further, described extraction negative threshold scope is P-1%～P+1%, and P is to control extraction negative pressure.
The present invention also provides a kind of coal-face gas pumping dynamic regulation system, and described system is included for being placed on
Each at least a set of pipeline Gas Signal sensing device that need to carry out the coal-face of gas pumping and the pipeline of corresponding tricks
Pressure regulator valve, and work surface control main frame；Work surface control main frame controls each pipeline pressure regulator valve of connection, and it is real that signal connects each gas
When monitoring device；The extraction information of pipeline each extraction field gas of gas real-time monitoring device real-time monitoring, described extraction information
Including each extraction mixing total flow, gas density and extraction negative pressure, judge extraction mixing total flow change：
If rising, calculate and compare the extraction mixing total flow rate of climb and the mash gas extraction scale rate of climb, if taking out
Adopt the mixing total flow rate of climb and be more than the mash gas extraction scale rate of climb, then control pressure regulator valve to reduce extraction negative pressure；If extraction
The mixing total flow rate of climb is less than the mash gas extraction scale rate of climb, then control pressure regulator valve to improve extraction negative pressure；Otherwise start
Potentiostatic mode；
If reducing, calculate and compare extraction mixing total flow decrease speed and mash gas extraction scale decrease speed, if taking out
Adopt mixing total flow decrease speed and be more than mash gas extraction scale decrease speed, then control pressure regulator valve to improve extraction negative pressure；If extraction
Mixing total flow decrease speed is less than mash gas extraction scale decrease speed, then control pressure regulator valve to reduce extraction negative pressure；Otherwise start
Potentiostatic mode；
If constant, start potentiostatic mode.
Further, gas real-time monitoring device real-time monitoring extraction negative pressure, after entering potentiostatic mode, work surface controls master
Machine gathers described extraction negative pressure signal, and judges extraction negative pressure whether in the range of extraction negative threshold, if being more than negative threshold
The upper limit set value of scope, then control pipeline pressure regulator valve reduction extraction negative pressure is to set point；If less than negative threshold scope
Lower limit set value, then control pressure regulator valve to increase extraction negative pressure to set point；If in the range of negative threshold, keep present situation.
Further, described extraction negative threshold scope is P-1%～P+1%, and P is to control extraction negative pressure.
The invention has the beneficial effects as follows：The present invention is by the difference to coal-face difference extraction field and same extraction field
Stage carries out independent automatically controlling respectively, is affected the most directly to embody parameter extraction combined amount by cranny development with gas pumping
With gas pumping scale as regulation and control foundation, the dynamic regulation of execution extraction negative pressure.The present invention is advanced over for coal-face
The law of development in journey crack, dynamic adjustment extraction negative pressure, improve extraction efficiency and extraction quality.
Brief description
Fig. 1 is coal-face gas pumping dynamic regulation system diagram；
Fig. 2 is coal-face gas pumping dynamic regulation method flow diagram；
Fig. 3 is coal-face gas pumping dynamic regulation other forms system diagram.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in further detail.
Coal-face gas pumping dynamic regulation embodiment of the method 1：
A. each device of system is mounted and connected on request and finishes；
B. automaton starts, and enters " dynamic voltage adjustment pattern "；
C. automaton collection pipeline monitoring device monitoring signals, calculate and judge QAlwaysWhether rise, if rising,
Enter d, otherwise enter f；
D. judge VQAlwaysWhether it is more than VQPureIf being more than, entering e, otherwise entering f；
E. control valve, reduces extraction negative pressure, and returns to b；
F. judge VQAlwaysWhether it is less than VQPureIf being less than, entering i, otherwise entering k；
G. judge QAlwaysWhether reducing, if reducing, entering h, otherwise enter k；
H. judge VQ`AlwaysWhether it is more than VQ`PureIf being more than, entering i, otherwise entering j；
I. control valve, improves extraction negative pressure, and returns to b；
J. judge VQ`AlwaysWhether it is less than VQ`PureIf being less than, entering e, otherwise entering k；
K. start " voltage stabilizing " pattern.
Coal-face gas pumping dynamic regulation embodiment of the method 2：
Coal-face gas pumping dynamic regulation method flow diagram is as shown in Fig. 2 method is as follows：
A. each device of system is mounted and connected on request and finishes；
B. automaton starts, and enters " dynamic voltage adjustment pattern "；
C. automaton collection pipeline monitoring device monitoring signals, calculate and judge QAlwaysWhether rise, if rising,
Enter d, otherwise enter f；
D. judge VQAlwaysWhether it is more than VQPureIf being more than, entering e, otherwise entering f；
E. control valve, reduces extraction negative pressure, and returns to b；
F. judge VQAlwaysWhether it is less than VQPureIf being less than, entering i, otherwise entering k；
G. judge QAlwaysWhether reducing, if reducing, entering h, otherwise enter k；
H. judge VQ`AlwaysWhether it is more than VQ`PureIf being more than, entering i, otherwise entering j；
I. control valve, improves extraction negative pressure, and returns to b；
J. judge VQ`AlwaysWhether it is less than VQ`PureIf being less than, entering e, otherwise entering k；
K. start " voltage stabilizing " pattern；
L. judging whether extraction negative pressure declines, if declining, entering m, otherwise enter o；
M. judging that whether extraction negative pressure declines more than 1%, if exceeding, entering n, otherwise enter p；
N. control valve, makes extraction negative pressure increase and returns in normal range, and return to b；
O. judging whether extraction negative pressure rises, if rising, entering q, otherwise enter p；
P. maintain extraction negative pressure constant, and return to b；
Q. judging that whether extraction negative pressure rises more than 1%, if exceeding, entering r, otherwise enter p；
R. control valve, makes extraction negative pressure be decreased back in normal range, and returns to b.
In this embodiment, in different phase, after extraction negative pressure reaches optimum, if extraction negative pressure fluctuates up and down,
The stability of whole control system not only can be affected it is often more important that affecting gas pumping efficiency.And due to extraction pipeline long when
Between corrosion, pipeline gas leakage situation often occurs；There are a large amount of dust and steam additionally, due to extraction pipeline, condense in tube wall
On, lead to increase of pipe resistance etc., all can lead to the change of extraction negative pressure.This potentiostatic mode is it is simply that the extraction working as pipeline is born
When pressure reaches optimum negative pressure value, can automatically ensure pipeline extraction negative pressure continually and steadily within normal range, prevent frequent change
Change and fluctuate.
In this embodiment, extraction negative threshold scope is set to P-1%～P+1%.Can according to real system situation, if
Put different threshold ranges.
Coal-face gas pumping dynamic regulation system embodiment 1：
Coal-face gas pumping dynamic regulation system diagram of the present invention is as shown in figure 1, send out for cracks in coal seam
Educate different situations, in cracks in coal seam aplasia, cracks in coal seam is developed and cracks in coal seam is developed obvious three regions and is respectively provided with one
Individual 1, pipeline pressure regulator valve 2 of pipeline gas real-time monitoring device and a gas pumping device for controlling dynamically 3, this system is also
Including work surface control main frame 4.Work surface control main frame 4 controls each gas pumping device for controlling dynamically of connection, each gas
Extraction device for controlling dynamically controls the corresponding pipeline pressure regulator valve of connection, and signal connects this signal sensor of tile road.
Pipeline gas real-time monitoring device 1 is used for flow, gas density and the extraction negative pressure of real-time monitoring extraction pipeline；Pipe
Road pressure regulator valve 2 is used for adjusting extraction pipeline pressure；Gas pumping device for controlling dynamically 3 is used for gathering pipeline signal sensor
Signal, automatically analyze control logic and control pipeline pressure regulator valve carries out extraction negative pressure and automatically adjusts；Work surface control main frame 4 is to adopt
Coal face gas extraction dynamic regulation core apparatus, have collection, the work surface watt of gas pumping device for controlling dynamically 3 signal
The collection of this extraction main pipeline monitoring information, work surface evaluation analysis up to standard, to the management of gas pumping device for controlling dynamically 3 with
And the function such as the self study to work surface entirety extraction negative pressure rule and self-application.
On the basis of each device is mounted and connected as requested and finishes, system start-up, enter " dynamic voltage adjustment pattern ".Watt
The extraction information of this each extraction field gas of extraction device for controlling dynamically 3 real-time monitoring, extraction information includes the total stream of extraction mixing
Amount, gas density and extraction negative pressure, and judge mash gas extraction total flow QAlwaysChange：
If QAlwaysRise, then calculate and compare extraction mixing total flow rate of climb VQAlwaysWith the mash gas extraction scale rate of climb
VQPureIf, VQAlways>VQPure, then gas pumping device for controlling dynamically 3 control pipeline pressure regulator valve 2 reduction extraction negative pressure, if VQAlways<VQPure, then
Control pipeline pressure regulator valve 2 improves extraction negative pressure, otherwise enters " potentiostatic mode "；
If QAlwaysReduce, then calculate and compare extraction mixing total flow decrease speed VQ`AlwaysWith mash gas extraction scale decrease speed
VQ`PureIf, VQ`Always>VQ`Pure, then gas pumping device for controlling dynamically 3 control pipeline pressure regulator valve 2 raising extraction negative pressure, if VQ`Always<VQ
`Pure, then control pipeline pressure regulator valve 2 reduction extraction negative pressure, otherwise enters " potentiostatic mode "；
If QAlwaysConstant, then enter potentiostatic mode.
After entering " potentiostatic mode ", judging whether extraction negative pressure declines, if declining, judging whether extraction negative pressure exceedes
1%, if exceeding, gas pumping device for controlling dynamically 3 control pipeline pressure regulator valve 2, so that extraction negative pressure is increased and return to set point,
If not less than 1%, maintain extraction negative pressure constant；If extraction negative pressure does not decline, judge whether extraction negative pressure rises, if rising
Then judge that whether extraction negative pressure rises more than 1%, if exceeding, gas pumping device for controlling dynamically 3 control pipeline pressure regulator valve 2, make
Extraction negative pressure is decreased back to set point, if not less than 1%, maintains extraction negative pressure constant；If extraction negative pressure is constant, remain existing
Shape.
In the present embodiment, it is equipped with three sets of gas pumping device for controlling dynamically, pipeline gas in coal-face real-time
Monitoring device and pressure regulator valve, it may be noted that this is the Typical Disposition of this system, can join in each work surface according to actual needs
The gas pumping control device of standby required tricks, pipeline gas real-time monitoring device and pressure regulator valve.
Coal-face gas pumping dynamic regulation system embodiment 2：
In the above-described embodiments, work surface control main frame is concurrently accessed the gas pumping dynamic control of multiple coal-faces
Device, then control corresponding pipeline pressure regulator valve to realize automatically controlling by gas pumping device for controlling dynamically.Can also be without using
Gas pumping device for controlling dynamically, is directly accessed multiple pipeline gas real-time monitoring devices by work surface control main frame and pipeline is adjusted
Pressure valve, realizes automatically controlling, system diagram is as shown in Figure 3.
Develop different situations for cracks in coal seam, in cracks in coal seam aplasia, cracks in coal seam is developed and cracks in coal seam is developed
Obvious three regions are respectively provided with 1, pipeline pressure regulator valve 2 of a pipeline gas real-time monitoring device, and this system also includes work
Make face control main frame 4.Work surface control main frame 4 controls each pipeline pressure regulator valve of connection, and signal connects each this signal of tile road
Sensing device.
Pipeline gas real-time monitoring device 1 is used for flow, gas density and the extraction negative pressure of real-time monitoring extraction pipeline；Pipe
Road pressure regulator valve 2 is used for adjusting extraction pipeline pressure；Work surface control main frame 4 is coal-face gas pumping dynamic regulation core
Device.
On the basis of each device is mounted and connected as requested and finishes, device starts, and enters " dynamic voltage adjustment pattern ".Work
Make the extraction information of each extraction field gas of face control main frame 4 real-time monitoring, extraction information includes extraction mixing total flow, gas
Concentration and extraction negative pressure, and judge mash gas extraction total flow QAlwaysChange：
If QAlwaysRise, then calculate and compare extraction mixing total flow rate of climb VQAlwaysWith the mash gas extraction scale rate of climb
VQPureIf, VQAlways>VQPureThen work surface control main frame 4 control pipeline pressure regulator valve 2 reduces extraction negative pressure, if VQAlways<VQPureThen control pipeline
Pressure regulator valve 2 improves extraction negative pressure, otherwise enters " potentiostatic mode "；
If QAlwaysReduce, then calculate and compare extraction mixing total flow decrease speed VQ`AlwaysWith mash gas extraction scale decrease speed
VQ`PureIf, VQ`Always>VQ`PureThen work surface control main frame 4 control pipeline pressure regulator valve 2 improves extraction negative pressure, if VQ`Always<VQ`PureThen control
Tubing giving sufficient strength pressure regulator valve 2 reduces extraction negative pressure, otherwise enters " potentiostatic mode "；
If QAlwaysConstant, then enter potentiostatic mode.
After entering " potentiostatic mode ", judging whether extraction negative pressure declines, if declining, judging whether extraction negative pressure exceedes
1%, if exceeding, work surface control main frame 4 control pipeline pressure regulator valve 2, so that extraction negative pressure is increased and return to set point, if not surpassing
Crossing 1% then maintains extraction negative pressure constant；If extraction negative pressure does not decline, judging whether extraction negative pressure rises, if rising, judging
Whether extraction negative pressure rises more than 1%, if exceeding, work surface control main frame 4 control pipeline pressure regulator valve 2, and so that extraction negative pressure is reduced
Return to set point, if not less than 1%, maintain extraction negative pressure constant, if extraction negative pressure is constant, maintain the statusquo.
Claims (9)
1. a kind of coal-face gas pumping dynamic regulation method is it is characterised in that each extraction field gas of real-time monitoring
Extraction information, described extraction information includes extraction mixing total flow, gas density and extraction negative pressure, judges extraction mixing total flow
Change：
If rising, calculate and compare the extraction mixing total flow rate of climb and the mash gas extraction scale rate of climb, if extraction mixes
Close the total flow rate of climb and be more than the mash gas extraction scale rate of climb, then reduce extraction negative pressure；If extraction mixing total flow rises
Speed is less than the mash gas extraction scale rate of climb, then improve extraction negative pressure；Otherwise start potentiostatic mode；
If reducing, calculate and compare extraction mixing total flow decrease speed and mash gas extraction scale decrease speed, if extraction mixes
Close total flow decrease speed and be more than mash gas extraction scale decrease speed, then improve extraction negative pressure；If extraction mixing total flow declines
Speed is less than mash gas extraction scale decrease speed, then reduce extraction negative pressure；Otherwise start potentiostatic mode；
If constant, start potentiostatic mode.
2. coal-face gas pumping dynamic regulation method according to claim 1 is it is characterised in that real-time monitoring is taken out
Adopt negative pressure, after entering potentiostatic mode, judge extraction negative pressure whether in the range of extraction negative threshold, if being more than the negative threshold upper limit
Setting value, then reduce extraction negative pressure to set point；If being less than lower threshold limit setting value, increase extraction negative pressure to setting
Scope；If in the range of negative threshold, keep present situation.
3. coal-face gas pumping dynamic regulation method according to claim 2 is it is characterised in that described extraction is born
Pressure threshold range is P-1%～P+1%, and P is to control extraction negative pressure.
4. a kind of coal-face gas pumping dynamic regulation system is it is characterised in that described system is included for being placed on often
The pipeline of at least a set of pipeline Gas Signal sensing device and corresponding tricks that individual need carry out the coal-face of gas pumping is adjusted
Pressure valve and gas pumping device for controlling dynamically, and work surface control main frame；Work surface control main frame controls each gas of connection
Extraction device for controlling dynamically, each gas pumping device for controlling dynamically controls the corresponding pipeline pressure regulator valve of connection, signal connecting tube
Road gas real-time monitoring device；The extraction information of pipeline each extraction field gas of gas real-time monitoring device real-time monitoring, described
Extraction information includes each extraction mixing total flow, gas density and extraction negative pressure, judges extraction mixing total flow change：
If rising, calculate and compare the extraction mixing total flow rate of climb and the mash gas extraction scale rate of climb, if extraction mixes
Close the total flow rate of climb and be more than the mash gas extraction scale rate of climb, then control pressure regulator valve to reduce extraction negative pressure；If extraction mixes
The total flow rate of climb is less than the mash gas extraction scale rate of climb, then control pressure regulator valve to improve extraction negative pressure；Otherwise start voltage stabilizing
Pattern；
If reducing, calculate and compare extraction mixing total flow decrease speed and mash gas extraction scale decrease speed, if extraction mixes
Close total flow decrease speed and be more than mash gas extraction scale decrease speed, then control pressure regulator valve to improve extraction negative pressure；If extraction mixes
Total flow decrease speed is less than mash gas extraction scale decrease speed, then control pressure regulator valve to reduce extraction negative pressure；Otherwise start voltage stabilizing
Pattern；
If constant, start potentiostatic mode.
5. coal-face gas pumping dynamic regulation system according to claim 4 is it is characterised in that gas is supervised in real time
Survey device real-time monitoring extraction negative pressure, after entering potentiostatic mode, gas pumping device for controlling dynamically collection described extraction negative pressure letter
Number, and judge extraction negative pressure whether in the range of extraction negative threshold, if more than the upper limit set value of negative threshold scope, controlling
Tubing giving sufficient strength pressure regulator valve reduces extraction negative pressure to set point；If less than the lower limit set value of negative threshold scope, control pressure regulation
Valve increases extraction negative pressure to set point；If in the range of negative threshold, keep present situation.
6. coal-face gas pumping dynamic regulation system according to claim 5 is it is characterised in that described extraction is born
Pressure threshold range is P-1%～P+1%, and P is to control extraction negative pressure.
7. a kind of coal-face gas pumping dynamic regulation system is it is characterised in that described system is included for being placed on often
The pipeline of at least a set of pipeline Gas Signal sensing device and corresponding tricks that individual need carry out the coal-face of gas pumping is adjusted
Pressure valve, and work surface control main frame；Work surface control main frame controls each pipeline pressure regulator valve of connection, and it is real-time that signal connects each gas
Monitoring device；The extraction information of pipeline each extraction field gas of gas real-time monitoring device real-time monitoring, described extraction packet
Include each extraction mixing total flow, gas density and extraction negative pressure, judge extraction mixing total flow change：
If rising, calculate and compare the extraction mixing total flow rate of climb and the mash gas extraction scale rate of climb, if extraction mixes
Close the total flow rate of climb and be more than the mash gas extraction scale rate of climb, then control pressure regulator valve to reduce extraction negative pressure；If extraction mixes
The total flow rate of climb is less than the mash gas extraction scale rate of climb, then control pressure regulator valve to improve extraction negative pressure；Otherwise start voltage stabilizing
Pattern；
If reducing, calculate and compare extraction mixing total flow decrease speed and mash gas extraction scale decrease speed, if extraction mixes
Close total flow decrease speed and be more than mash gas extraction scale decrease speed, then control pressure regulator valve to improve extraction negative pressure；If extraction mixes
Total flow decrease speed is less than mash gas extraction scale decrease speed, then control pressure regulator valve to reduce extraction negative pressure；Otherwise start voltage stabilizing
Pattern；
If constant, start potentiostatic mode.
8. coal-face gas pumping dynamic regulation system according to claim 7 is it is characterised in that gas is supervised in real time
Survey device real-time monitoring extraction negative pressure, after entering potentiostatic mode, work surface control main frame gathers described extraction negative pressure signal, and sentences
Whether disconnected extraction negative pressure is in the range of extraction negative threshold, if being more than the upper limit set value of negative threshold scope, control pipeline
Pressure regulator valve reduces extraction negative pressure to set point；If less than the lower limit set value of negative threshold scope, pressure regulator valve is controlled to increase
Extraction negative pressure is to set point；If in the range of negative threshold, keep present situation.
9. coal-face gas pumping dynamic regulation system according to claim 8 is it is characterised in that described extraction is born
Pressure threshold range is P-1%～P+1%, and P is to control extraction negative pressure.
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| CN103758561A (en) * | 2014-02-21 | 2014-04-30 | 淄博安益矿用设备有限公司 | Coal mine gas extraction control system and extraction control method |
| CN105065057A (en) * | 2015-07-23 | 2015-11-18 | 陕西煤业化工技术研究院有限责任公司 | Coal mine gas extraction parameter automatic regulating and controlling system and coal mine gas extraction parameter automatic regulating and controlling method |
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