CN106285769A - Coal mine gas drainage dynamic optimization regulation and control method and system - Google Patents
Coal mine gas drainage dynamic optimization regulation and control method and system Download PDFInfo
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- CN106285769A CN106285769A CN201610797532.1A CN201610797532A CN106285769A CN 106285769 A CN106285769 A CN 106285769A CN 201610797532 A CN201610797532 A CN 201610797532A CN 106285769 A CN106285769 A CN 106285769A
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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
- 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
- E21B43/006—Production of coal-bed methane
Abstract
The invention discloses a kind of coal mine gas drainage dynamic optimization regulation and control method and system, belong to coal mine gas drainage technical field.Monitoring the extraction information of each extraction field gas in real time, described extraction information includes extraction mixing total flow, gas density and extraction negative pressure；Whether the absolute value calculating the difference that each extraction field controls negative pressure value sum and the specified negative pressure value of pumping plant is more than pumping plant threshold value, if more than pumping plant threshold value, controls the specified negative pressure adjustment of pumping plant for controlling negative pressure value sum；If less than, judge that extraction field controls whether logic is " Mining and pumping ", if it is not, then be that " gas pre-drainage " controls logic.These regulation and control method and system are for different extraction fields, select most suitable extraction logic to carry out gas pumping negative pressure comprehensively, dynamic optimization regulates and controls, realize mash gas extraction concentration optimum, and the extraction negative pressure realizing extraction pumping plant adjusts automatically with the regulation and control of drill site extraction negative pressure, improve the extraction efficiency of gas.
Description
Technical field
The invention belongs to coal mine gas drainage technical field, be specifically related to a kind of coal mine gas drainage dynamic optimization regulation and control side
Method and system.
Background technology
Coal mine gas drainage is broadly divided into " gas pre-drainage " and " Mining and pumping " two kinds of situations.When taking out while adopt, owing to being subject to
To at extraction work surface mining influence, whole work surface can be divided into crack not grow, cranny development and obvious three of cranny development
Region or stage.Cranny development is embodied directly in the combined amount in extraction pipeline and gas scale to the impact of extraction, therefore needs
Utilize extraction combined amount and gas scale as extraction negative pressure being optimized the direct judge index of control, and this optimization control
It is made as dynamic control process.And when carrying out gas pre-drainage, owing to the external interference being subject to is less, the change of gas density is by
The pressure controlled direct reference index of extraction.
Therefore, mine gas extraction system to be optimized regulation and control, accomplish to reach optimum by most suitable extraction negative pressure
Gas pumping amount, it is necessary to be adjusted controlling to the extraction point situation of coal mine gas, a point logic, could really improve
Gas pumping efficiency.
Summary of the invention
It is an object of the invention to provide a kind of coal mine gas drainage dynamic optimization regulation and control method, to bear with most suitable extraction
Pressure reaches optimum gas pumping amount, improves gas pumping efficiency.
In order to solve above-mentioned technical problem, the present invention provides a kind of coal mine gas drainage dynamic optimization regulation and control method, including
Following steps:
1) monitor in real time the extraction information of each extraction field gas, described extraction information include extraction mixing total flow, watt
This concentration and extraction negative pressure；
2) calculate each extraction field and whether control the negative pressure value sum absolute value with the difference of the specified negative pressure value of pumping plant more than pumping plant
Threshold value, if more than pumping plant threshold value, controlling the specified negative pressure adjustment of pumping plant is that each extraction field controls negative pressure value sum；If less than pumping plant threshold
Value, it is judged that extraction field controls whether logic is " Mining and pumping ", if it is not, then be " gas pre-drainage "；
3) if it is " Mining and pumping " that extraction field controls logic, it is judged that extraction mixing total flow change:
If mixing total flow rises, then calculate and compare the extraction mixing total flow rate of climb and the rising of mash gas extraction scale
Speed, if the extraction mixing total flow rate of climb is more than the mash gas extraction scale rate of climb, then reduces extraction negative pressure；If extraction mixes
Close the total flow rate of climb and be less than the mash gas extraction scale rate of climb, then improve extraction negative pressure；Otherwise start potentiostatic mode；
If mixing total flow reduces, then calculate and compare extraction mixing total flow decrease speed and the decline of mash gas extraction scale
Speed, if extraction mixing total flow decrease speed is more than mash gas extraction scale decrease speed, then improves extraction negative pressure；If extraction mixes
Close total flow decrease speed and be less than mash gas extraction scale decrease speed, then reduce extraction negative pressure；Otherwise start potentiostatic mode；
If mixing total flow is constant, then start potentiostatic mode.
4) if it is " gas pre-drainage " that extraction field controls logic, then judge that whether gas density scope is in concentration threshold scope
In；If more than the upper limit set value of concentration threshold scope, then improving extraction negative pressure according to certain stride；If less than concentration threshold
The lower limit set value of scope, then reduce extraction negative pressure according to certain stride；If in the range of concentration threshold, start voltage stabilizing mould
Formula.
Further, monitoring extraction negative pressure in real time, after entering potentiostatic mode, it is judged that whether extraction negative pressure is at extraction negative pressure threshold
In the range of value, if more than negative threshold upper limit set value, then reduce extraction negative pressure to set point；If less than negative threshold scope
Lower limit set value, then increase extraction negative pressure to set point；If in the range of negative threshold, then keep present situation.
Further, described gas density threshold range is c-2%～c+2%, and c is controlled concentration.
Further, described extraction negative threshold scope is P-1%～P+1%, and P is for controlling extraction negative pressure.
Further, described pumping plant threshold value is 2kpa.
The present invention also provides for a kind of coal mine gas drainage dynamic optimization regulator control system, and described system includes for being placed on not
With the most a set of pipeline gas real-time monitoring device of extraction field, and the gas of the pressure regulator valve of corresponding tricks and corresponding tricks is taken out
Collection/control apparatus, this system also includes gas pumping master control device；Each gas pumping controls device and monitors in real time with each gas
Device signal connects, and gas pumping controls device control and connects corresponding pressure regulator valve, and gas pumping master control device controls to connect respectively
Gas pumping controls device；
1) pipeline gas real-time monitoring device monitors the extraction information of each extraction field gas, described extraction information bag in real time
Include extraction mixing total flow, gas density and extraction negative pressure；
2) difference of gas pumping master control device calculating each extraction field control negative pressure value sum negative pressure value specified with pumping plant is
No more than pumping plant threshold value, if more than pumping plant threshold value, controlling the specified negative pressure adjustment of pumping plant is that each extraction field controls negative pressure value sum；If
Less than pumping plant threshold value, it is judged that extraction field controls whether logic is " Mining and pumping ", if it is not, then be " gas pre-drainage "；
3) if it is " Mining and pumping " that extraction field controls logic, it is judged that extraction mixing total flow change:
If mixing total flow rises, then calculate and compare the extraction mixing total flow rate of climb and the rising of mash gas extraction scale
Speed, if the extraction mixing total flow rate of climb is more than the mash gas extraction scale rate of climb, then gas pumping controls device control
Corresponding pressure regulator valve reduces extraction negative pressure；If the extraction mixing total flow rate of climb is less than the mash gas extraction scale rate of climb, then
Gas pumping controls device and controls corresponding pressure regulator valve raising extraction negative pressure；Otherwise start potentiostatic mode；
If mixing total flow reduces, then calculate and compare extraction mixing total flow decrease speed and the decline of mash gas extraction scale
Speed, if extraction mixing total flow decrease speed is more than mash gas extraction scale decrease speed, then gas pumping controls device control
Corresponding pressure regulator valve improves extraction negative pressure；If extraction mixing total flow decrease speed is less than mash gas extraction scale decrease speed, then
Gas pumping controls device and controls corresponding pressure regulator valve reduction extraction negative pressure；Otherwise start potentiostatic mode；
If mixing total flow is constant, then start potentiostatic mode.
4) if it is " gas pre-drainage " that extraction field controls logic, then judge that whether gas density scope is in concentration threshold scope
In；If more than the upper limit set value of concentration threshold scope, then gas pumping controls device and controls corresponding pressure regulator valve according to necessarily
Stride improve extraction negative pressure；If less than the lower limit set value of concentration threshold scope, then gas pumping controls device and controls correspondence
Pressure regulator valve reduce extraction negative pressure according to certain stride；If in the range of concentration threshold, start potentiostatic mode.
Further, gas real-time monitoring device monitors extraction negative pressure in real time, and after entering potentiostatic mode, gas pumping controls
Device gathers described extraction negative pressure signal, and judge extraction negative pressure whether in the range of extraction negative threshold, if more than negative pressure threshold
The upper limit set value of value scope, then gas pumping controls device and controls corresponding pressure regulator valve reduction extraction negative pressure to set point；
If less than the lower limit set value of negative threshold scope, then gas pumping controls device and controls corresponding pressure regulator valve increase extraction negative pressure
To set point；If in the range of negative threshold, then keep present situation.
Further, described gas density threshold range is c-2%～c+2%, and c is controlled concentration.
Further, described extraction negative threshold scope is P-1%～P+1%, and P is for controlling extraction negative pressure.
Further, described pumping plant threshold value is 2kpa.
The present invention also provides for a kind of coal mine gas drainage dynamic optimization regulator control system, and described system includes for being placed on not
With the most a set of gas real-time monitoring device and the pressure regulator valve of corresponding tricks of extraction field, this system also includes a set of gas pumping
Control device, gas pumping master control device and extraction pumping plant；Gas pumping controls device to be believed with each gas real-time monitoring device
Number connecting, gas pumping controls device and controls to connect corresponding pressure regulator valve, and gas pumping master control device controls to connect gas pumping
Control device；
1) monitor in real time the extraction information of each extraction field gas, described extraction information include extraction mixing total flow, watt
This concentration and extraction negative pressure；
2) gas pumping control master control device calculate each extraction field control negative pressure value sum and the specified negative pressure value of pumping plant it
Whether difference is more than pumping plant threshold value, if more than pumping plant threshold value, then controlling the specified negative pressure adjustment of pumping plant is that each extraction field controls negative pressure value
Sum；If less than pumping plant threshold value, it is judged that extraction field controls whether logic is " Mining and pumping ", if it is not, then be that " gas is pre-
Take out "；
3) if it is " Mining and pumping " that extraction field controls logic, it is judged that extraction mixing total flow change:
If mixing total flow rises, then calculate and compare the extraction mixing total flow rate of climb and the rising of mash gas extraction scale
Speed, if the extraction mixing total flow rate of climb is more than the mash gas extraction scale rate of climb, then controls pressure regulator valve reduction extraction and bears
Pressure；If the extraction mixing total flow rate of climb is less than the mash gas extraction scale rate of climb, then controls pressure regulator valve and improve extraction negative pressure；
Otherwise start potentiostatic mode；
If mixing total flow reduces, then calculate and compare extraction mixing total flow decrease speed and the decline of mash gas extraction scale
Speed, if extraction mixing total flow decrease speed is more than mash gas extraction scale decrease speed, then controls pressure regulator valve raising extraction and bears
Pressure；If extraction mixing total flow decrease speed is less than mash gas extraction scale decrease speed, then controls pressure regulator valve and reduce extraction negative pressure；
Otherwise start potentiostatic mode；
If mixing total flow is constant, then start potentiostatic mode.
4) if it is " gas pre-drainage " that extraction field controls logic, then judge that whether gas density scope is in concentration threshold scope
In；If more than the upper limit set value of concentration threshold scope, then control pressure regulator valve and improve extraction negative pressure according to certain stride；If it is little
In the lower limit set value of concentration threshold scope, then control pressure regulator valve and reduce extraction negative pressure according to certain stride；If at concentration threshold
In the range of value, start potentiostatic mode.
Further, gas real-time monitoring device monitors extraction negative pressure in real time, and after entering potentiostatic mode, gas pumping controls
Device gathers described extraction negative pressure signal, and judge extraction negative pressure whether in the range of extraction negative threshold, if more than negative pressure threshold
The upper limit set value of value scope, then control pressure regulator valve and reduce extraction negative pressure to set point；If less than under negative threshold scope
Limit setting value, then control pressure regulator valve and increase extraction negative pressure to set point；If in the range of negative threshold, then keep present situation.
Further, described gas density threshold range is c-2%～c+2%, and c is controlled concentration.
Further, described extraction negative threshold scope is P-1%～P+1%, and P is for controlling extraction negative pressure.
Further, described pumping plant threshold value is 2kpa.
The invention has the beneficial effects as follows: the method and system are optimized control to coal mine gas system, distinguish mine well
Under " gas pre-drainage " and " Mining and pumping " different extraction situation, select most suitable extraction logic that gas pumping negative pressure is carried out
Comprehensively, dynamic optimization regulation and control；And, the method and system have Multi-regulation function, it is achieved the extraction negative pressure of extraction pumping plant with
The regulation and control of drill site extraction negative pressure and automatically adjust, improve the extraction efficiency of gas.
Accompanying drawing explanation
Fig. 1 is coal mine gas drainage dynamic optimization regulator control system figure；
Fig. 2 is that coal mine gas drainage dynamic optimization regulates and controls method flow diagram；
Fig. 3 is that coal mine gas drainage " Mining and pumping " controls logical flow chart；
Fig. 4 is that coal mine gas drainage " gas pre-drainage " controls logical flow chart；
Fig. 5 is that coal mine gas drainage dynamic optimization regulates and controls other formal system figures.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is described in further detail.
Coal mine gas drainage dynamic optimization regulation and control embodiment of the method 1:
(1) " Mining and pumping " regulation and control method, it controls logic chart as shown in Figure 3.
(1-1) start " Mining and pumping " and control logic；
(1-2) automaton gathers pipeline monitoring device monitoring signal, calculates and judges QAlwaysWhether rise, if on
Rise, then enter (1-3), otherwise enter (1-6)；
(1-3) VQ is judgedAlwaysWhether more than VQPureIf being more than, entering (1-4), otherwise entering (1-5)；
(1-4) control valve, reduce extraction negative pressure, and return to (1-1)；
(1-5) VQ is judgedAlwaysWhether less than VQPureIf being less than, entering (1-8), otherwise entering (1-10)；
(1-6) Q is judgedAlwaysWhether reduce, if reducing, entering (1-7), otherwise entering (1-10)；
(1-7) VQ` is judgedAlwaysWhether more than VQ`PureIf being more than, entering (1-8), otherwise entering (1-9)；
(1-8) control valve, improve extraction negative pressure, and return to (1-1)；
(1-9) VQ` is judgedAlwaysWhether less than VQ`PureIf being less than, entering (1-4), otherwise entering (1-10)；
(1-10) start " potentiostatic mode ", enter (3-8).
(2) " gas pre-drainage " regulation and control method, it controls logic as shown in Figure 4.
(2-1) start " gas pre-drainage " and control logic；
(2-2) automaton gathers pipeline monitoring device monitoring signal, and judges whether gas density rises, if on
Rise, then enter (2-3), otherwise enter (2-5)；
(2-3) judge that whether gas density rises more than 2%, if exceeding, entering (2-4), otherwise entering 2-8)；
(2-4) control pressure regulator valve, improve extraction negative pressure 0.1kpa, and return to (2-1)；
(2-5) judge whether gas density reduces, if reducing, entering (2-6), otherwise entering (2-8)；
(2-6) judge that whether gas density reduces more than 2%, if exceeding, entering (2-7), otherwise entering 2-8)；
(2-7) control pressure regulator valve, reduce extraction negative pressure 0.1kpa, and return to (2-1)；
(2-8) start " potentiostatic mode ", enter (3-8).
(3) coal mine gas drainage dynamic optimization regulation and control method
Regulation and control that this system control logic comprises pumping plant, " taking out while adopt " regulation and control method, " gas pre-drainage " regulation and control method with
And voltage regulator.It controls logic chart as shown in Figure 4.
(3-1) system building completes and starts；
(3-2) gas pumping master control device gathers each drill site control device information；
(3-3) whether the absolute value of the difference analyzing each extraction optimum negative pressure value sum negative pressure value specified with pumping plant exceedes
2kpa, if so, enters (3-4), otherwise enters (3-5)；
(3-4) pumping plant is controlled, by specified negative pressure adjustment for controlling negative pressure value sum；
(3-5) judge that each extraction drill site controls whether device is " taking out while adopt " logic, if so, enters (3-6), otherwise enters
Enter (3-7)；
(3-6) starting " taking out while adopt " and control logic, logic control method refers to regulation and control method (1)；
(3-7) starting " gas pre-drainage " and control logic, logic control method refers to regulation and control method (2)；
(3-8) " potentiostatic mode " is started.
Coal mine gas drainage dynamic optimization regulation and control embodiment of the method 2:
(1) " Mining and pumping " regulation and control method, it controls logic chart as shown in Figure 3.
(1-1) start " Mining and pumping " and control logic；
(1-2) automaton gathers pipeline monitoring device monitoring signal, calculates and judges QAlwaysWhether rise, if on
Rise, then enter (1-3), otherwise enter (1-6)；
(1-3) VQ is judgedAlwaysWhether more than VQPureIf being more than, entering (1-4), otherwise entering (1-5)；
(1-4) control valve, reduce extraction negative pressure, and return to (1-1)；
(1-5) VQ is judgedAlwaysWhether less than VQPureIf being less than, entering (1-8), otherwise entering (1-10)；
(1-6) Q is judgedAlwaysWhether reduce, if reducing, entering (1-7), otherwise entering (1-10)；
(1-7) VQ` is judgedAlwaysWhether more than VQ`PureIf being more than, entering (1-8), otherwise entering (1-9)；
(1-8) control valve, improve extraction negative pressure, and return to (1-1)；
(1-9) VQ` is judgedAlwaysWhether less than VQ`PureIf being less than, entering (1-4), otherwise entering (1-10)；
(1-10) start " potentiostatic mode ", enter (3-8).
(2) " gas pre-drainage " regulation and control method
It controls logic chart as shown in Figure 3.
(2-1) start " gas pre-drainage " and control logic；
(2-2) automaton gathers pipeline monitoring device monitoring signal, and judges whether gas density rises, if on
Rise, then enter (2-3), otherwise enter (2-5)；
(2-3) judge that whether gas density rises more than 2%, if exceeding, entering (2-4), otherwise entering 2-8)；
(2-4) control pressure regulator valve, improve extraction negative pressure 0.1kpa, and return to (2-1)；
(2-5) judge whether gas density reduces, if reducing, entering (2-6), otherwise entering (2-8)；
(2-6) judge that whether gas density reduces more than 2%, if exceeding, entering (2-7), otherwise entering 2-8)；
(2-7) control pressure regulator valve, reduce extraction negative pressure 0.1kpa, and return to (2-1)；
(2-8) start " potentiostatic mode ", enter (3-8).
(3) coal mine gas drainage dynamic optimization regulation and control method
Regulation and control that this system control logic comprises pumping plant, " taking out while adopt " regulation and control method, " gas pre-drainage " regulation and control method with
And voltage regulator.It controls logic chart as shown in Figure 4.
(3-1) system building completes and starts；
(3-2) gas pumping master control device gathers a drill site control device information；
(3-3) whether the absolute value of the difference analyzing each extraction optimum negative pressure value sum negative pressure value specified with pumping plant exceedes
2kpa, if so, enters (3-4), otherwise enters (3-5)；
(3-4) pumping plant is controlled, by specified negative pressure adjustment for controlling negative pressure value sum；
(3-5) judge that each extraction drill site controls whether device is " taking out while adopt " logic, if so, enters (3-6), otherwise enters
Enter (3-7)；
(3-6) starting " taking out while adopt " and control logic, logic control method refers to regulation and control method (1)；
(3-7) starting " gas pre-drainage " and control logic, logic control method refers to regulation and control method (2)；
(3-8) " potentiostatic mode " is started；
(3-9) judge whether extraction negative pressure declines, if declining, entering (3-10), otherwise entering (3-12)；
(3-10) judge that whether extraction negative pressure declines more than 1%, if exceeding, entering (3-11), otherwise entering (3-13)；
(3-11) control pressure regulator valve, make extraction negative pressure increase and return in normal range, and return to (3-2)；
(3-12) judge whether extraction negative pressure rises, if rising, entering (3-14), otherwise entering (3-13)；
(3-13) maintain extraction negative pressure constant, and return to (3-2)；
(3-14) judge that whether extraction negative pressure rises more than 1%, if exceeding, entering (3-15), otherwise entering (3-13)；
(3-15) control pressure regulator valve, make extraction negative pressure be decreased back in normal range, and return to (3-2).
In different phase, when extraction negative pressure reaches optimum, if extraction negative pressure is also fluctuating up and down, not only can affect
The stability of whole control system, it is often more important that affect gas pumping efficiency.And owing to extraction pipeline corrodes for a long time, past
Toward there will be pipeline gas leakage situation；There are a large amount of dust and steam additionally, due to extraction pipeline, condense on tube wall, cause pipeline to hinder
The increase etc. of power, all can cause the change of extraction negative pressure.This potentiostatic mode, it is simply that when the extraction negative pressure of pipeline reaches optimum negative pressure
During value, can automatically ensure that pipeline extraction negative pressure, continually and steadily within normal range, prevents frequently change and fluctuation.
Coal mine gas drainage dynamic optimization regulator control system embodiment 1:
Coal mine gas drainage dynamic optimization regulator control system figure of the present invention is as shown in Figure 1.
In different extraction fields, corresponding pipeline gas real-time monitoring device 1 is set, and monitors in real time with pipeline gas
The pressure regulator valve 2 of device correspondence tricks and control device 3 with the gas pumping of the pipeline corresponding tricks of gas real-time monitoring device, and
Gas pumping master control device 4 and extraction pumping plant 5.Each gas pumping controls device 3 and each corresponding gas real-time monitoring device 1
Signal connects, and controls to connect the pressure regulator valve 3 of each correspondence, and gas pumping master control device 4 controls to connect each gas pumping and controls dress
Putting 3, extraction pumping plant 5 controls to be connected with gas pumping master control device 4.
Pipeline gas real-time monitoring device 1 is for monitoring extraction this concentration of pipeline Neva, flow and extraction negative pressure in real time；Adjust
Pressure valve 2 is used for regulating pipeline extraction pressure；Gas pumping controls device 3 and is used for gathering pipeline monitoring device signal, extraction pumping plant
Specified negative pressure signal, automatically analyzes control logic, and control pressure regulator valve carries out extraction negative pressure and is automatically adjusted；Gas pumping master control fills
Put 4 for gather each extraction drill site gas pumping control device signal (include pipeline gas density, flow, extraction negative pressure,
Control information), comprehensive analyze the down-hole optimum control extraction negative pressure value of different time sections, send control signal, be automatically adjusted and take out
Adopt the specified negative pressure value of pumping plant；Extraction pumping plant 5 is used for providing gas pumping negative pressure, it may include ground gas extraction pumping plant and down-hole are moved
Dynamic pumping plant.
Each device be mounted and connected as requested complete on the basis of, gas pumping master control device 4 analyzes each extraction
Whether the absolute value of the difference of field control negative pressure value sum and the specified negative pressure value of pumping plant is more than 2kpa, if exceeding, then controlling pumping plant will
Specified negative pressure adjustment is for controlling negative pressure value；Otherwise judge that each extraction field controls whether device is " taking out while adopt " logic, if then
Start " taking out while adopt " and control logic；Otherwise start " gas pre-drainage " and control logic.
When starting " Mining and pumping " control logic, pipeline gas real-time monitoring device 3 monitors taking out of extraction field gas in real time
Accepting and believing breath, extraction information includes extraction mixing total flow, gas density and extraction negative pressure, and judges that mash gas extraction total flow changes
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 control device 3 controls pressure regulator valve 2 and reduces extraction negative pressure, if VQAlways<VQPure, then pressure regulation is controlled
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 controls pressure regulator valve 2 and improves extraction negative pressure, if VQ`Always<VQ`Pure,
Then control pressure regulator valve 2 and reduce extraction negative pressure, otherwise enter " potentiostatic mode "；
If QAlwaysConstant, then start potentiostatic mode.
When starting " gas pre-drainage " control logic, it is judged that whether gas density rises, if rising, judges in gas density
Whether rising more than 2%, if exceeding, improving extraction negative pressure 0.1kpa, if not less than 2%, then start " potentiostatic mode "；If gas
Concentration does not rise, then judge whether gas density declines, if declining, judges that whether gas density declines more than 2%, if super
Cross then reduction extraction negative pressure 0.1kpa, if not less than, start " potentiostatic mode "；If gas density is constant, start " voltage stabilizing equally
Pattern ".
Start " potentiostatic mode " judge whether extraction negative pressure declines, if decline; would judge extraction negative pressure whether more than 1%, if
Exceeding, gas pumping controls device 3 and controls pressure regulator valve 2, makes extraction negative pressure increase and returns to set point, if not less than 1%, tieing up
Hold extraction negative pressure constant；If extraction negative pressure does not declines, then judging whether extraction negative pressure rises, if rising, judging in extraction negative pressure
Whether rising more than 1%, if exceeding, gas pumping, make extraction negative pressure be decreased back to set model if controlling device 3 and controlling pressure regulator valve 2
Enclose, if not less than 1%, maintain extraction negative pressure constant；If extraction negative pressure is constant, maintain the statusquo.
Coal mine gas drainage dynamic optimization regulator control system embodiment 2:
In coal mine gas drainage dynamic optimization regulator control system embodiment 1, control logic for " Mining and pumping ", for often
Individual pipeline gas real-time monitoring device is correspondingly arranged a gas pumping and controls device.In the present embodiment, can be for multiple pipes
Road gas real-time monitoring device, arranges a gas pumping and controls device, it is achieved a device, and multi-measuring point controls, by this
Gas pumping controls device and is circulated controlling of sampling multiple pipeline gas real-time monitoring device.Concrete system diagram such as Fig. 5 institute
Show, at each work surface, be respectively directed to the different situations that cracks in coal seam is grown, grow at cracks in coal seam aplasia, cracks in coal seam
Grow obvious three regions with cracks in coal seam and be respectively provided with a set of pipeline gas real-time monitoring device and the pressure regulator valve of corresponding tricks,
And a gas pumping controls device, this gas pumping control device control this three set of tubes gas and monitor dress in real time
Put and pressure regulator valve, constitute one group of " Mining and pumping " control system.Each work surface can arrange one group " Mining and pumping " and control system
System.Concrete regulation and control method is similar with coal mine gas drainage dynamic optimization regulator control system embodiment 1, repeats no more.
In the present embodiment, it is equipped with three set gas pumping device for controlling dynamically, pipeline gas at 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 at each work surface according to actual needs
The gas pumping of standby required tricks controls device, pipeline gas real-time monitoring device and pressure regulator valve.
Claims (10)
1. a coal mine gas drainage dynamic optimization regulation and control method, it is characterised in that comprise the steps:
1) monitoring the extraction information of each extraction field gas in real time, described extraction information includes that extraction mixing total flow, gas are dense
Degree and extraction negative pressure；
2) whether the absolute value calculating the difference that each extraction field controls negative pressure value sum and the specified negative pressure value of pumping plant is more than pumping plant threshold value,
If more than pumping plant threshold value, controlling the specified negative pressure adjustment of pumping plant is that each extraction field controls negative pressure value sum；If less than pumping plant threshold value, sentencing
Disconnected extraction field controls whether logic is " Mining and pumping ", if it is not, then be " gas pre-drainage "；
3) if it is " Mining and pumping " that extraction field controls logic, it is judged that extraction mixing total flow change:
If mixing total flow rises, then calculate and compare the extraction mixing total flow rate of climb and raising speed in mash gas extraction scale
Degree, if the extraction mixing total flow rate of climb is more than the mash gas extraction scale rate of climb, then reduces extraction negative pressure；If extraction mixes
The total flow rate of climb is less than the mash gas extraction scale rate of climb, then improve extraction negative pressure；Otherwise start potentiostatic mode；
If mixing total flow reduces, then calculate and compare extraction mixing total flow decrease speed and reduction of speed under mash gas extraction scale
Degree, if extraction mixing total flow decrease speed is more than mash gas extraction scale decrease speed, then improves 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 mixing total flow is constant, then start potentiostatic mode.
4) if it is " gas pre-drainage " that extraction field controls logic, then judge that gas density scope is whether in the range of concentration threshold；If
More than the upper limit set value of concentration threshold scope, then improve extraction negative pressure according to certain stride；If less than concentration threshold scope
Lower limit set value, then reduce extraction negative pressure according to certain stride；If in the range of concentration threshold, start potentiostatic mode.
Coal mine gas drainage dynamic optimization the most according to claim 1 regulation and control method, it is characterised in that monitor extraction in real time
Negative pressure, after entering potentiostatic mode, it is judged that whether extraction negative pressure is in the range of extraction negative threshold, if setting more than the negative threshold upper limit
Definite value, then reduce extraction negative pressure to set point；If less than negative threshold range lower limit setting value, then increase extraction negative pressure to setting
Determine scope；If in the range of negative threshold, then keep present situation.
3. a coal mine gas drainage dynamic optimization regulator control system, it is characterised in that described system includes for being placed on difference
The most a set of pipeline gas real-time monitoring device of extraction field, and the pressure regulator valve of corresponding tricks and the gas pumping of corresponding tricks
Controlling device, this system also includes gas pumping master control device；Each gas pumping controls device and monitors dress in real time with each gas
Confidence number connects, and gas pumping controls device and controls to connect corresponding pressure regulator valve, and gas pumping master control device controls to connect each watt
This takes out collection/control apparatus；
1) pipeline gas real-time monitoring device monitors the extraction information of each extraction field gas in real time, and described extraction information includes taking out
Adopt mixing total flow, gas density and extraction negative pressure；
2) difference of gas pumping master control device calculating each extraction field control negative pressure value sum negative pressure value specified with pumping plant is the biggest
In pumping plant threshold value, if more than pumping plant threshold value, controlling the specified negative pressure adjustment of pumping plant is that each extraction field controls negative pressure value sum；If being less than
Pumping plant threshold value, it is judged that extraction field controls whether logic is " Mining and pumping ", if it is not, then be " gas pre-drainage "；
3) if it is " Mining and pumping " that extraction field controls logic, it is judged that extraction mixing total flow change:
If mixing total flow rises, then calculate and compare the extraction mixing total flow rate of climb and raising speed in mash gas extraction scale
Degree, if the extraction mixing total flow rate of climb is more than the mash gas extraction scale rate of climb, then the control of gas pumping control device is right
The pressure regulator valve answered reduces extraction negative pressure；If the extraction mixing total flow rate of climb is less than the mash gas extraction scale rate of climb, then watt
This is taken out collection/control apparatus and controls corresponding pressure regulator valve raising extraction negative pressure；Otherwise start potentiostatic mode；
If mixing total flow reduces, then calculate and compare extraction mixing total flow decrease speed and reduction of speed under mash gas extraction scale
Degree, if extraction mixing total flow decrease speed is more than mash gas extraction scale decrease speed, then the control of gas pumping control device is right
The pressure regulator valve answered improves extraction negative pressure；If extraction mixing total flow decrease speed is less than mash gas extraction scale decrease speed, then watt
This is taken out collection/control apparatus and controls corresponding pressure regulator valve reduction extraction negative pressure；Otherwise start potentiostatic mode；
If mixing total flow is constant, then start potentiostatic mode.
4) if it is " gas pre-drainage " that extraction field controls logic, then judge that gas density scope is whether in the range of concentration threshold；If
More than the upper limit set value of concentration threshold scope, then gas pumping controls device and controls corresponding pressure regulator valve according to certain stride
Improve extraction negative pressure；If less than the lower limit set value of concentration threshold scope, then gas pumping controls device and controls corresponding pressure regulation
Valve reduces extraction negative pressure according to certain stride；If in the range of concentration threshold, start potentiostatic mode.
Coal mine gas drainage dynamic optimization regulator control system the most according to claim 3, it is characterised in that gas is monitored in real time
Device monitors extraction negative pressure in real time, and after entering potentiostatic mode, gas pumping controls device and gathers described extraction negative pressure signal, and sentences
Whether disconnected extraction negative pressure is in the range of extraction negative threshold, if more than the upper limit set value of negative threshold scope, then gas pumping
Control device and control corresponding pressure regulator valve reduction extraction negative pressure to set point；If the lower limit set less than negative threshold scope
Value, then gas pumping controls device and controls corresponding pressure regulator valve increase extraction negative pressure to set point；If in negative threshold scope
In, then keep present situation.
Coal mine gas drainage dynamic optimization regulator control system the most according to claim 3, it is characterised in that described gas density
Threshold range is c-2%～c+2%, and c is controlled concentration.
Coal mine gas drainage dynamic optimization regulator control system the most according to claim 3, it is characterised in that described extraction negative pressure
Threshold range is P-1%～P+1%, and P is for controlling extraction negative pressure.
Coal mine gas drainage dynamic optimization regulator control system the most according to claim 3, it is characterised in that described pumping plant threshold value
For 2kpa.
8. a coal mine gas drainage dynamic optimization regulator control system, it is characterised in that described system includes for being placed on difference
The most a set of gas real-time monitoring device of extraction field and the pressure regulator valve of corresponding tricks, this system also includes a set of gas pumping control
Device processed, gas pumping master control device and extraction pumping plant；Gas pumping controls device and each gas real-time monitoring device signal
Connecting, gas pumping controls device and controls to connect corresponding pressure regulator valve, and gas pumping master control device controls to connect gas pumping control
Device processed；
1) monitoring the extraction information of each extraction field gas in real time, described extraction information includes that extraction mixing total flow, gas are dense
Degree and extraction negative pressure；
2) difference of gas pumping control master control device calculating each extraction field control negative pressure value sum negative pressure value specified with pumping plant is
No more than pumping plant threshold value, if more than pumping plant threshold value, then controlling the specified negative pressure adjustment of pumping plant is that each extraction field controls negative pressure value sum；
If less than pumping plant threshold value, it is judged that extraction field controls whether logic is " Mining and pumping ", if it is not, then be " gas pre-drainage "；
3) if it is " Mining and pumping " that extraction field controls logic, it is judged that extraction mixing total flow change:
If mixing total flow rises, then calculate and compare the extraction mixing total flow rate of climb and raising speed in mash gas extraction scale
Degree, if the extraction mixing total flow rate of climb is more than the mash gas extraction scale rate of climb, then controls pressure regulator valve and reduces extraction negative pressure；
If the extraction mixing total flow rate of climb is less than the mash gas extraction scale rate of climb, then controls pressure regulator valve and improve extraction negative pressure；No
Then start potentiostatic mode；
If mixing total flow reduces, then calculate and compare extraction mixing total flow decrease speed and reduction of speed under mash gas extraction scale
Degree, if extraction mixing total flow decrease speed is more than mash gas extraction scale decrease speed, then controls pressure regulator valve and improves extraction negative pressure；
If extraction mixing total flow decrease speed is less than mash gas extraction scale decrease speed, then controls pressure regulator valve and reduce extraction negative pressure；No
Then start potentiostatic mode；
If mixing total flow is constant, then start potentiostatic mode.
4) if it is " gas pre-drainage " that extraction field controls logic, then judge that gas density scope is whether in the range of concentration threshold；If
More than the upper limit set value of concentration threshold scope, then control pressure regulator valve and improve extraction negative pressure according to certain stride；If less than dense
The lower limit set value of degree threshold range, then control pressure regulator valve and reduce extraction negative pressure according to certain stride；If at concentration threshold model
In enclosing, start potentiostatic mode.
Coal mine gas drainage dynamic optimization regulator control system the most according to claim 8, it is characterised in that gas is monitored in real time
Device monitors extraction negative pressure in real time, and after entering potentiostatic mode, gas pumping controls device and gathers described extraction negative pressure signal, and sentences
Whether disconnected extraction negative pressure is in the range of extraction negative threshold, if more than the upper limit set value of negative threshold scope, then controlling pressure regulation
Valve reduces extraction negative pressure to set point；If less than the lower limit set value of negative threshold scope, then control pressure regulator valve and increase extraction
Negative pressure is to set point；If in the range of negative threshold, then keep present situation.
Coal mine gas drainage dynamic optimization regulator control system the most according to claim 8, it is characterised in that described gas is dense
Degree threshold range is c-2%～c+2%, and c is controlled concentration.
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