CN104329108B - A kind of control method of mine Multi-working-surface blast overall dynamics balance control system - Google Patents
A kind of control method of mine Multi-working-surface blast overall dynamics balance control system Download PDFInfo
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- CN104329108B CN104329108B CN201410455440.6A CN201410455440A CN104329108B CN 104329108 B CN104329108 B CN 104329108B CN 201410455440 A CN201410455440 A CN 201410455440A CN 104329108 B CN104329108 B CN 104329108B
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
Abstract
A kind of mine Multi-working-surface blast overall dynamics balance control system and control method, belong to underground coal mine spontaneous combustion diaster prevention and control technical field.Control system, including pedestrian's air door and damper, arranges ventilating duct through pedestrian's air door, and ventilating duct is connected with frequency conversion control ventilation blower；Arrange return air pressure-measuring pipe, return air pressure-measuring pipe and the first pressure transducer through damper to be connected；Being additionally provided with Overburden gob area pressure-measuring pipe, it is connected with the second pressure transducer；The pressure transducer of each work surface is connected with controller with converter.Control method: open the frequency conversion control ventilation blower of each work surface, air feed in air intake lane；By pressure sensor monitoring return airway and the wind pressure value of Overburden gob area of each work surface, and transmit to controller；Controller, according to wind pressure value signal, carries out regulator control system determination of stability, if meeting requirement, maintains regulation and control blast constant；Otherwise system unstability, carries out wind pressure value and redistributes, and then realizes mine Multi-working-surface blast overall dynamics balance.
Description
Technical field
The invention belongs to underground coal mine spontaneous combustion diaster prevention and control technical field, particularly relate to a kind of mine Multi-working-surface blast entirety and move
State balance control system and control method.
Background technology
There is the problem of mining of closed distance coal seam group in China's majority mining area, such as Datong Mine Area, Xishan mine, Huainan Mining Area etc., right
Closely the fire study on prevention of spontaneous fire seam group will be the key subjects of coal mine underground exploitation.During coal seam group working from top down,
Underlying seam face roof is caving and will result in multilamellar goaf, the mutual UNICOM in earth's surface, forms complicated crossings on different level and leaks out net,
Air leakage source point substantial amounts is difficult to accurately search, and easily causes freely burning fire accident.
When exploiting work surface and using exhaust ventilation, CO, CO in multilamellar goaf2, the toxic and harmful such as gas will import in a large number
Work surface, threatens underground operators life security；And when using positive draft, the fresh distinguished and admirable multilamellar goaf that will leak in a large number,
Cause spontaneous combustion in goaf, if goaf has high concentration gas to assemble, can also result in gas explosion accident and occur.
Apply traditional method for equalizing voltage only can solve static pressure regulation and control problem, and multilamellar flow field in goaf is logical with leaking out of earth's surface
Road has hundreds and thousands of, is affected by factors such as temperature, atmospheric pressure, force ventilation and exploitations, the stream of gas in flow field
Amount and pressure are not constant between, and are as the function of time change.Therefore, multilamellar flow field in goaf blast is dynamically become
Situation about changing, tradition method for equalizing voltage cannot obtain accurately all pressure points, it is difficult to effectively solves the problems referred to above.
In the case of being difficult to multilamellar flow field in goaf blast whole machine balancing, if taking certain technological means to make exploitation work
The gas pressure in face changes along with the change of adjacent goaf, top gas pressure, and reaches equal as far as possible, then can stop gas
The mutual flowing of body, this is multilamellar flow field in goaf local dynamic station balance.Therefore, it is not required to consider the air leakage source of substantial amounts,
Only need to catch the remittance-tailentry that uniquely leaks out, problem will be simplified；Goaf adjacent with its top to return airway
Between carry out pressure reduction adjustment, make whole flow field of leaking out realize in subrange dynamic pressure balance, then can prevent harmful gas from leading
Enter to exploit work surface and fresh distinguished and admirable leak into goaf.
When the single work surface of mine carries out blast regulation and control, multilamellar flow field in goaf local dynamic station balance control method will effectively solve
The closely freely burning fire problem in spontaneous fire seam group recovery process.And it is same for mine Multi-working-surface or neighbouring mine working face
The situation of Shi Jinhang blast regulation and control, is affected with pit mining process by coal seam geological condition, may between each blast control region
There is air seepage channel, then the blast variation of any one control region all can make the blast of another control region change therewith,
And then destroy its pressure regulation poised state.Owing to multilamellar goaf connected state is information fuzzy, complicated unordered chaos body, solve
There are three aspect difficulties in this problem: one is the space connected state that cannot grasp each regulation and control region；Two is the sky that each regulation and control are interregional
Between connected state will be with pit mining process and constantly change, be a dynamic process；Three is connected region passage
Parameter cannot determine, it is impossible to application tradition local building method calculates regulation and control parameter.Therefore, carry out at mine Multi-working-surface simultaneously
In the case of blast regulation and control, apply traditional pressure regulation method to be difficult to each work surface and all reach pressure balance state, easily cause
Spontaneous combustion in goaf or gas explosion accident occur.
Summary of the invention
The problem existed for prior art, the present invention provide a kind of mine Multi-working-surface blast overall dynamics balance control system and
Control method.It is theoretical based on multilamellar flow field in goaf multiple spot regulation and control feedback compensation whole machine balancing, uses centralized control, by
The regulation and control wind pressure value of each work surface distributed unitedly by controller, prevents goaf harmful gas from flowing into exploitation work surface and exploitation work surface
Fresh distinguished and admirable leak into goaf, it is ensured that each work surface blast all keeps local dynamic station to balance.
To achieve these goals, the present invention adopts the following technical scheme that, a kind of mine Multi-working-surface blast overall dynamics balance control
System processed, including being arranged on each work surface air intake lane twice pedestrian's air door at entrance to a lane and being arranged on each tailentry and lean on
Twice damper at nearly entrance to a lane；Twice pedestrian's air door is provided with ventilating duct, described ventilating duct and frequency conversion control ventilation blower
It is connected, frequency conversion control ventilation blower is each equipped with converter；Twice damper is provided with return air pressure-measuring pipe, return air
Pressure-measuring pipe and the first pressure transducer are connected；Top board between each tailentry mouth and damper is to Overburden gob area
Offer pressure measuring drill hole, pressure measuring drill hole is provided with Overburden gob area pressure-measuring pipe, Overburden gob area pressure-measuring pipe and the second pressure and passes
Sensor is connected；First pressure transducer of each work surface, the second pressure transducer are connected with controller respectively with converter.
First pressure transducer of described each work surface, the second pressure transducer and converter are respectively by RS485 bus and control
Device processed is connected.
Described ventilating duct is connected with frequency conversion control ventilation blower by flexible air duct.
Described frequency conversion control ventilation blower uses convection rotary type local frequency conversion control ventilation blower, at each work surface frequency conversion control ventilation blower and
Ventilating duct is disposed as two groups, one group use one group standby, described frequency conversion control ventilation blower is hung on lane side side or is fixed on wind
On the steady assembling platform of machine.
Described return air pressure-measuring pipe and Overburden gob area pressure-measuring pipe are copper pipe, and return air pressure-measuring pipe passes through sebific duct and the first pressure sensing
Device is connected, and Overburden gob area pressure-measuring pipe is connected by sebific duct and the second pressure transducer.
The control method of the mine Multi-working-surface blast overall dynamics balance control system described in employing, comprises the steps:
Step one: open the frequency conversion control ventilation blower of each work surface, air feed in air intake lane, distinguished and admirable via return airway and regulation wind
Door flows out；
Step 2: by the first pressure transducer of each work surface and the second pressure sensor monitoring return airway and Overburden gob area
Wind pressure value, and wind pressure value signal is transmitted to controller；
Step 3: controller, according to the wind pressure value signal of each work surface received, carries out regulator control system determination of stability, i.e. sentences
Can fixed each work surface regulation and control blast meet and prevent goaf harmful gas from flowing into exploitation work surface and preventing from exploiting the fresh wind of work surface
Throughflow leaks into the requirement in goaf；If meeting requirement, then mine Multi-working-surface blast overall dynamics balance control system is stable,
Maintain each work surface regulation and control blast constant；Otherwise system unstability, carries out each work surface wind pressure value by controller and redistributes, and
The wind pressure value redistributed is transmitted the converter to each work surface；The converter of each work surface is by controlling frequency conversion control ventilation blower
Rotating speed, make the regulation and control wind pressure value of each work surface reach assignment of allocation value, and then realize mine Multi-working-surface blast overall dynamics and put down
Weighing apparatus.
In said method, when frequency conversion control ventilation blower breaks down at air intake lane, controller automatically switch to standby variable frequency and adjust
Control ventilation blower；When two groups of frequency conversion control ventilation blowers break down simultaneously, open this work surface air intake lane twice pedestrian's air door and
The twice damper of return airway, face exhaust ventilation of resuming work.
In said method, once controller breaks down, and opens twice pedestrian's air door and the two of return airway in each work surface air intake lane
Road damper, face exhaust ventilation of resuming work.
Controller described in step 3, according to the wind pressure value signal of each work surface received, carries out regulator control system determination of stability
And controller carries out each work surface wind pressure value and redistributes, it specifically comprises the following steps that
Step A: carry out the connected state identification of Multi-working-surface space,
The wind pressure value of t m work surface of mine is respectively u1(t), u2(t) ... um(t), the blast to i-th work surface
Increase disturbance quantity δi(i=1,2 ... m), in disturbance quantity δiEffect under, jth work surface blast produce disturbance
Amount is δj(i) (j=1,2 ... m)；If δjI ()=0, then explanation jth work surface and i-th work surface are without connected state；
If δj, then there is air seepage channel between explanation jth work surface and i-th work surface in (i) ≠ 0；
Step B: set up regulator control system blast coupling matrix,
In formula, M is regulator control system blast coupling matrix；R is blast gain factor matrix；E is m rank unit matrixs；rijFor
Blast gain coefficient, during i=j, rij=0；uiT () is the wind pressure value of t mine i-th work surface；δiFor to i-th work
Make the disturbance quantity that the blast in face increases；δjI () is in disturbance quantity δiEffect under, jth work surface blast produce disturbance quantity；
I=1,2 ... m；J=1,2 ... m；
With column vector U (t)=[u1(t), u2(t) ... um(t)]TRepresent the wind pressure value of t m work surface of mine, then
U (t+n)=MnU (t),Wherein, U (t+n) represents t+n moment mine
The wind pressure value of m work surface；
Step C: carry out regulator control system determination of stability,
The theoretic wind pressure control codomain that each work surface realizes blast overall dynamics balance regards a m dimension real number set asWherein, Δi1、Δi2(i=1,
2 ... m) represent that i-th regulation and control region meets goaf harmful gas and do not flows into exploitation work surface and leak into the new of goaf respectively
The fresh distinguished and admirable permission blast changing value not causing spontaneous combustion of remaining coal；IfThen claiming system is balance about U (t),
Otherwise claiming system is unstability about U (t)；
Step D: carry out each work surface wind pressure value and redistribute,
Solve proper polynomialDraw all eigenvalue λ of matrix M1、
λ2、…λm；
For each eigenvalue λ1(i=1,2 ... m), solve system of linear equations (M-λiE) U=0, draws correspondence
Characteristic vector U=Ui(t)；
Calculate the n power (λ of each eigenvalue1)n, (λ2)n... (λm)nIf there is certain eigenvalue λ of matrix Mk, it is right
The characteristic vector answered is Uk(t)=[uk1(t), uk2(t) ... ukm(t)]T, and for any positive integer n, be satisfied by:
Then system is about UkT () is n step balance；Wherein, ε1The regulation and control error radius allowed for i-th work surface blast,
εi=min{ Δil, Δi2, characteristic vector Uk(t)=[uk1(t), uk2(t) ... ukm(t)]TIt is the blast apportioning cost of each work surface.
Beneficial effects of the present invention:
By mine Multi-working-surface blast overall dynamics balance control system and the control method of the present invention, overcome conventional operation face
Ventilation voltage-regulating technique insurmountable multilamellar flow field in goaf crossings on different level Air leakage control and freely burning fire prevent and treat a difficult problem.Especially solve
During the regulation and control of mine Multi-working-surface blast, be interconnected the system wind pressure disorder problem caused by each regulation and control region, ensured each work
Make face blast and entirely reach local dynamic station balance, prevent goaf harmful gas from flowing into exploitation work surface and the exploitation fresh wind of work surface
Stream leaks into goaf.This system run all right is reliable, effectively controls and decreases easy spontaneous combustion ultra close distance coal seam group's fire incident
Occur, it is to avoid the coal resources adopted caused due to freely burning fire are dull, improve charcoal resource utilization of can mining.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the mine Multi-working-surface blast overall dynamics balance control system of the present invention；
In figure, 1, converter, 2, frequency conversion control ventilation blower, 3, pedestrian's air door, 4, ventilating duct, 5, air intake lane, 6, open
Mining face, 7, goaf, 8, return airway, 9, return air pressure-measuring pipe, 10, damper, the 11, first pressure transducer,
12, Overburden gob area pressure-measuring pipe, the 13, second pressure transducer, 14, return air entrance to a lane, 15, air intake entrance to a lane, 16, RS485
Bus, 17, PLC.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
In the present embodiment, there are three work surfaces, respectively A work surface, B work surface and C work surface.A work surface air intake lane row
People's air door specification is 3 × 2.5m2, return airway damper specification is 3.1 × 2.6m2；B work surface air intake lane pedestrian's air door specification
It is 2.9 × 2.6m2, return airway damper specification is 3 × 2.5m2；C work surface air intake lane pedestrian's air door specification is 3.2 × 2.5m2,
Return airway damper specification is 3 × 2.7m2.The diameter of A, B, C work surface pressure measuring drill hole is 108mm；A, B, C work
Distance between air intake lane 5, face twice pedestrian's air door 3 is 15m, the distance between outer row people's air door 3 and air intake entrance to a lane 15
It is 10m；Distance between A, B, C tailentry 8 twice damper 10 is all higher than a train length, and outside is adjusted
Distance between joint air door 10 and return air entrance to a lane 14 is 10m.
As it is shown in figure 1, a kind of mine Multi-working-surface blast overall dynamics balance control system, including being arranged on each work surface air intake
The lane 5 twice pedestrian's air door at entrance to a lane 3 and be arranged on each tailentry 8 twice damper 10 at entrance to a lane；
Twice pedestrian's air door 3 is provided with ventilating duct 4, and described ventilating duct 4 is connected with frequency conversion control ventilation blower 2, adjusts in frequency conversion
It is each equipped with converter 1 on control ventilation blower 2；Twice damper 10 is provided with return air pressure-measuring pipe 9, return air pressure-measuring pipe 9
It is connected with the first pressure transducer 11；Top board between each tailentry mouth 14 and damper 10 is mined out to overlying
District offers pressure measuring drill hole, and pressure measuring drill hole is provided with Overburden gob area pressure-measuring pipe 12, Overburden gob area pressure-measuring pipe 12 and
Two pressure transducers 13 are connected；First pressure transducer the 11, second pressure transducer 13 and 1 point of converter of each work surface
Tong Guo RS485 bus 16 not be connected with the PLC 17 being arranged in mine air intake big lane master control room.
Described ventilating duct 4 uses irony ventilating duct, and it is connected with frequency conversion control ventilation blower 2 by flexible air duct.
Described frequency conversion control ventilation blower 2 uses convection rotary type local frequency conversion control ventilation blower, and its power is 75kw, at A, B, C
Work surface frequency conversion control ventilation blower 2 and ventilating duct 4 are disposed as two groups, one group use one group standby, described frequency conversion control ventilate
Machine 2 is hung on lane side side or is fixed on the steady assembling platform of blower fan.
The return air pressure-measuring pipe 9 of A, B, C work surface and Overburden gob area pressure-measuring pipe 12 all use copper pipe, a diameter of Ф 10mm, return
Wind pressure-measuring pipe 9 is tightly connected by sebific duct and the first pressure transducer 11, makes the first pressure transducer 11 can measure return airway
The wind pressure value of 8, Overburden gob area pressure-measuring pipe 12 is tightly connected by sebific duct and the second pressure transducer 13, makes the second pressure pass
Sensor 13 can measure the wind pressure value of Overburden gob area.
The control method of the mine Multi-working-surface blast overall dynamics balance control system described in employing, comprises the steps:
Step one: open the frequency conversion control ventilation blower of A, B, C work surface, air feed in air intake lane, distinguished and admirable via return airway and
Damper flows out；Due to the obstruct of pedestrian's air door 3, distinguished and admirable air intake entrance to a lane 15 can not be passed to；Each air supply of working face amount is respectively
For: A work surface 1050m3/ min, B work surface 1310m3/ min, C work surface 1140m3/min；
Step 2: adopted by the first pressure transducer of A, B, C work surface and the second pressure sensor monitoring return airway and overlying
The wind pressure value of dead zone, and wind pressure value signal is transmitted to PLC；
Step 3: PLC, according to the wind pressure value signal of A, B, C work surface received, carries out regulator control system stability
Judge, i.e. judge that can each work surface regulation and control blast meet and prevent goaf harmful gas from flowing into exploitation work surface and preventing from exploiting work
Make the fresh distinguished and admirable excess in face and leak into the requirement in goaf；If meeting requirement, then mine Multi-working-surface blast overall dynamics balance controls
System stability, maintains A, B, C work surface regulation and control blast constant；Otherwise system unstability, when exploitation work surface leaks into goaf
When fresh distinguished and admirable speed is more than 0.1m/min, Residual coal in goaf is susceptible to spontaneous combustion, when work surface blast is less than Overburden gob area
During blast, inflow is exploited work surface by goaf harmful gas；Now, each work surface wind pressure value weight is carried out by PLC
New distribution, and by the wind pressure value the redistributed converter by RS485 bus transfer to A, B, C work surface；A、B、C
The converter of work surface, by controlling the rotating speed of frequency conversion control ventilation blower, makes the regulation and control wind pressure value of each work surface reach assignment of allocation value,
And then realize mine Multi-working-surface blast overall dynamics balance.When reaching mine Multi-working-surface blast overall dynamics balance, A, B, C
Tailentry wind pressure value is than Overburden gob area wind pressure value high about 2～3mmH2O。
In said method, when frequency conversion control ventilation blower breaks down at air intake lane, PLC automatically switch to standby change
Frequency modulation control ventilation blower；When two groups of frequency conversion control ventilation blowers break down simultaneously, open twice pedestrian's wind in this work surface air intake lane
Door and the twice damper of return airway, face exhaust ventilation of resuming work.
In said method, once PLC breaks down, and opens twice pedestrian's air door and the return airway in each work surface air intake lane
Twice damper, face exhaust ventilation of resuming work.
PLC described in step 3, according to the wind pressure value signal of each work surface received, carries out regulator control system stability
Judging and controller carries out each work surface wind pressure value and redistributes, it specifically comprises the following steps that
Step A: carry out the connected state identification of Multi-working-surface space,
The wind pressure value of t m work surface of mine is respectively u1(t), u2(t) ... um(t), the blast to i-th work surface
Increase disturbance quantity δi(i=1,2 ... m), in disturbance quantity δiEffect under, jth work surface blast produce disturbance
Amount is δj(i) (j=1,2 ... m)；If δjI ()=0, then explanation jth work surface and i-th work surface are without connected state；
If δj, then there is air seepage channel between explanation jth work surface and i-th work surface in (i) ≠ 0；
Step B: set up regulator control system blast coupling matrix,
In formula, M is regulator control system blast coupling matrix；R is blast gain factor matrix；E is m rank unit matrixs；rijFor
Blast gain coefficient, during i=j, rij=0；uiT () is the wind pressure value of t mine i-th work surface；δiFor to i-th work
Make the disturbance quantity that the blast in face increases；δjI () is in disturbance quantity δiEffect under, jth work surface blast produce disturbance quantity；
I=1,2 ... m；J=1,2 ... m；
With column vector U (t)=[u1(t), u2(t) ... um(t)]TRepresent the wind pressure value of t m work surface of mine, then
U (t+n)=MnU (t),Wherein, U (t+n) represents t+n moment mine
The wind pressure value of m work surface, t+n has spent again the n moment after representing t；
Step C: carry out regulator control system determination of stability,
The theoretic wind pressure control codomain that each work surface realizes blast overall dynamics balance regards one as with tieing up real number setWherein, Δi1、Δi2(i=1,
2 ... m) represent that i-th regulation and control region meets goaf harmful gas and do not flows into exploitation work surface and leak into the new of goaf respectively
The fresh distinguished and admirable permission blast changing value not causing spontaneous combustion of remaining coal；IfThen claiming system is balance about U (t),
Otherwise claiming system is unstability about U (t)；
Step D: carry out each work surface wind pressure value and redistribute,
Solve proper polynomialDraw all eigenvalue λ of matrix M1、
λ2、…λm；Wherein, λ is the eigenvalue of matrix M；
For each eigenvalue λi(i=1,2 ... m), solve system of linear equations (M-λiE) U=0, draws correspondence
Characteristic vector U=Ui(t)；
Calculate the n power (λ of each eigenvalue1)n, (λ2)n... (λm)nIf there is certain eigenvalue λ of matrix Mk, it is right
The characteristic vector answered is Uk(t)=[uk1(t), uk2(t) ... ukm(t)]T, and for any positive integer n, be satisfied by:
Then system is about UkT () is n step balance；Wherein, εiThe regulation and control error radius allowed for i-th work surface blast,
εi=min{ Δi1, Δi2, characteristic vector Uk(t)=[uk1(t), uk2(t) ... ukm(t)]TIt is the blast apportioning cost of each work surface.
Claims (4)
1. a control method for mine Multi-working-surface blast overall dynamics balance control system, described control system, including arranging
Adjust with being arranged on each tailentry twice at entrance to a lane at each work surface air intake lane twice pedestrian's air door at entrance to a lane
Joint air door；Twice pedestrian's air door is provided with ventilating duct, and described ventilating duct is connected with frequency conversion control ventilation blower, adjusts in frequency conversion
It is each equipped with converter on control ventilation blower；Twice damper is provided with return air pressure-measuring pipe, return air pressure-measuring pipe and the first pressure
Sensor is connected；Top board between each tailentry mouth and damper offers pressure measuring drill hole to Overburden gob area,
Pressure measuring drill hole is provided with Overburden gob area pressure-measuring pipe, Overburden gob area pressure-measuring pipe and the second pressure transducer be connected；Each work
Make first pressure transducer in face, the second pressure transducer is connected with controller respectively with converter；It is characterized in that, described
Control method comprises the steps:
Step one: open the frequency conversion control ventilation blower of each work surface, air feed in air intake lane, distinguished and admirable via return airway and regulation wind
Door flows out；
Step 2: by the first pressure transducer of each work surface and the second pressure sensor monitoring return airway and Overburden gob area
Wind pressure value, and wind pressure value signal is transmitted to controller；
Step 3: controller, according to the wind pressure value signal of each work surface received, carries out regulator control system determination of stability, i.e. sentences
Can fixed each work surface regulation and control blast meet and prevent goaf harmful gas from flowing into exploitation work surface and preventing from exploiting the fresh wind of work surface
Throughflow leaks into the requirement in goaf；If meeting requirement, then mine Multi-working-surface blast overall dynamics balance control system is stable,
Maintain each work surface regulation and control blast constant；Otherwise system unstability, carries out each work surface wind pressure value by controller and redistributes, and
The wind pressure value redistributed is transmitted the converter to each work surface；The converter of each work surface is by controlling frequency conversion control ventilation blower
Rotating speed, make the regulation and control wind pressure value of each work surface reach assignment of allocation value, and then realize mine Multi-working-surface blast overall dynamics and put down
Weighing apparatus.
The control method of mine Multi-working-surface blast overall dynamics balance control system the most according to claim 1, its feature
It is, when frequency conversion control ventilation blower breaks down at air intake lane, controller automatically switches to standby variable frequency regulation and control ventilation blower；
When two groups of frequency conversion control ventilation blowers break down simultaneously, open twice pedestrian's air door and the two of return airway in this work surface air intake lane
Road damper, face exhaust ventilation of resuming work.
The control method of mine Multi-working-surface blast overall dynamics balance control system the most according to claim 1, its feature
Being, once controller breaks down, and opens twice pedestrian's air door and the twice damper of return airway in each work surface air intake lane,
Resume work face exhaust ventilation.
The control method of mine Multi-working-surface blast overall dynamics balance control system the most according to claim 1, its feature
It is the wind pressure value signal according to each work surface received of the controller described in step 3, carries out regulator control system determination of stability
And controller carries out each work surface wind pressure value and redistributes, it specifically comprises the following steps that
Step A: carry out the connected state identification of Multi-working-surface space,
The wind pressure value of t m work surface of mine is respectively u1(t), u2(t) ... um(t), the blast to i-th work surface
Increase disturbance quantity δi(i=1,2 ... m), in disturbance quantity δiEffect under, jth work surface blast produce disturbance
Amount is δj(i) (j=1,2 ... m)；If δjI ()=0, then explanation jth work surface and i-th work surface are without connected state；
If δj, then there is air seepage channel between explanation jth work surface and i-th work surface in (i) ≠ 0；
Step B: set up regulator control system blast coupling matrix,
In formula, M is regulator control system blast coupling matrix；R is blast gain factor matrix；E is m rank unit matrixs；rijFor
Blast gain coefficient, during i=j, rij=0；uiT () is the wind pressure value of t mine i-th work surface；δiFor to i-th work
Make the disturbance quantity that the blast in face increases；δjI () is in disturbance quantity δiEffect under, jth work surface blast produce disturbance quantity；
I=1,2 ... m；J=1,2 ... m；
With column vector U (t)=[u1(t), u2(t) ... um(t)]TRepresent the wind pressure value of t m work surface of mine, then
U (t+n)=MnU (t),Wherein, U (t+n) represents t+n moment mine
The wind pressure value of m work surface；
Step C: carry out regulator control system determination of stability,
The theoretic wind pressure control codomain that each work surface realizes blast overall dynamics balance regards a m dimension real number set asWherein, △i1、△i2(i=1,
2 ... m) represent that i-th regulation and control region meets goaf harmful gas and do not flows into exploitation work surface and leak into the new of goaf respectively
The fresh distinguished and admirable permission blast changing value not causing spontaneous combustion of remaining coal；IfThen claiming system is balance about U (t),
Otherwise claiming system is unstability about U (t)；
Step D: carry out each work surface wind pressure value and redistribute,
Solve proper polynomialDraw all eigenvalue λ of matrix M1、
λ2、…λm；
For each eigenvalue λi(i=1,2 ... m), solve system of linear equations (M-λiE) U=0, draws correspondence
Characteristic vector U=Ui(t)；
Calculate the n power (λ of each eigenvalue1)n,(λ2)n,…(λm)nIf there is certain eigenvalue λ of matrix Mk, it is right
The characteristic vector answered is Uk(t)=[uk1(t), uk2(t) ... ukm(t)]T, and for any positive integer n, be satisfied by:
Then system is about UkT () is n step balance；Wherein, εiThe regulation and control error radius allowed for i-th work surface blast,
εi=min{ Δi1,Δi2, characteristic vector Uk(t)=[uk1(t), uk2(t) ... ukm(t)]TIt is the blast apportioning cost of each work surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410455440.6A CN104329108B (en) | 2014-09-09 | 2014-09-09 | A kind of control method of mine Multi-working-surface blast overall dynamics balance control system |
Applications Claiming Priority (1)
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| JP6544036B2 (en) * | 2015-05-18 | 2019-07-17 | 三菱電機株式会社 | Futon dryer |
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| CN107965347A (en) * | 2017-12-28 | 2018-04-27 | 中国矿业大学(北京) | It is a kind of to press gas controller and method |
| CN108425698B (en) * | 2018-03-19 | 2019-04-30 | 中煤科工集团西安研究院有限公司 | Coal mine down-hole tunnel tunnels method for treating flour dust |
| CN109162747B (en) * | 2018-10-19 | 2024-01-26 | 中国恩菲工程技术有限公司 | Mine return air guiding device |
| CN109667780B (en) * | 2018-11-12 | 2020-05-12 | 太原理工大学 | Pressure equalizing control device for keeping pressure difference at two ends of pressure equalizing area |
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