CN110273702A - A kind of coal seam substep water filling precisely controlling system and water-filling method - Google Patents
A kind of coal seam substep water filling precisely controlling system and water-filling method Download PDFInfo
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- CN110273702A CN110273702A CN201910465931.1A CN201910465931A CN110273702A CN 110273702 A CN110273702 A CN 110273702A CN 201910465931 A CN201910465931 A CN 201910465931A CN 110273702 A CN110273702 A CN 110273702A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
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Abstract
A kind of coal seam substep water filling precisely controlling system and water-filling method, it is related to coal-bed flooding technical field, the system includes flow sensor, pressure sensor, pressure injection fluid viscosity and pH value sensor, data monitoring substation and connection circuit, realize the real-time Transmission of data monitoring, it further include high-pressure hydraulic pump, water injection pipe, check valve, flow control valve and electric-controlled switch, realize the accurate control of water injection pressure and flow, it further include that water tank is deployed in fluid injection in real time, and the modified medicine-chest of several pressure injection liquid, drawing liquid pump, pressure injection liquid blender, current stabilization control valve, inlet/outlet pipeline, realize the physical property real-time monitoring to pressure injection liquid, above structure is needed for the different injection stage on the basis of mechanics parameter model, by the process of controller control all parts with the typing of the program language PCL controller, to make the present invention realize The real-time monitoring and control of substep water injection pressure and flow optimize needed for each stage modified pressure injection liquid, improve coal-bed flooding and take precautions against natural calamities effect.
Description
Technical field
The present invention relates to coal-bed flooding technical field, especially a kind of coal seam substep water filling precisely controlling system, Yi Jili
The method for completing coal-bed flooding with the system.
Background technique
With the increase of coal mining depth, coal seam crustal stress, gas pressure and content are significantly increased, cause coal with watt
This protrusion, dust, rock blast hazard prevention and control situation are more acute.Since coal-bed flooding can reduce coal seam gas-bearing capacity and coal body
Crustal stress, while increasing water content and coal dust is inhibited to generate, it has also become common Integrate Natural Disasters Prevention means.At the same time, to coal seam
The migration mechanism of the technology of water filling, equipment and water has carried out existing coal-bed flooding extensively and on the basis of furtheing investigate research
The improvement of technology, technique significantly improves water filling and takes precautions against natural calamities effect, but due to lacking to brill during specific coal-bed flooding
The monitoring and feedback in each stage in the injecting process of hole, cause the technological parameter filled the water when coal-bed flooding need according to practical experience into
Row manually controls, thus in underground construction, since different working face geology conditions and mining conditions differ greatly, technique ginseng
Several adjustment randomness is also big.Therefore according to the mechanics parameter model in different injection stage, to the technological parameter of coal-bed flooding into
Row control, and then realize the real-time monitoring of substep water injection pressure and flow and be precisely controlled, and optimal needed for each stage change is provided
Property pressure injection liquid takes precautions against natural calamities effect to improve coal-bed flooding, needs to do further existing water injection system for coal seams and water-filling method
Improvement.
Summary of the invention
For the real-time monitoring and control difficulty for solving different injection stage substep water injection pressure and flow, each stage note is determined
Modification pressure injection liquid needed for water and real-time control, so improve coal-bed flooding take precautions against natural calamities effect the technical issues of, the present invention provides
A kind of coal seam substep water filling precisely controlling system and water-filling method, specific technical solution are as follows.
A kind of coal seam substep water filling precisely controlling system, including PLC controller, data monitoring module, water filling control module
Regulate and control module with pressure injection liquid, PLC controller receives the monitoring data from data monitoring module, PLC controller control water filling control
Molding block and the regulation module work of pressure injection liquid；Data monitoring module include flow sensor, pressure sensor, pressure injection fluid viscosity and
PH value sensor, data monitoring substation and connection line, obtaining monitoring data in real time includes pressure in water injection hole, injection flow
With the physical-property parameter of water tank internal pressure fluid injection, monitoring data are transmitted to PLC controller by connection line；Fill the water control module
Including high-pressure hydraulic pump, water injection pipe, check valve, flow control valve and electric-controlled switch, high-pressure hydraulic pump is connected with water main, on water main
It is provided with check valve, is provided with flow control valve on each branch pipe of water main；It includes that pressure injection liquid is real-time that pressure injection liquid, which regulates and controls module,
The modified medicine-chest of water tank, several pressure injection liquid, drawing liquid pump, current stabilization control valve and inlet/outlet pipeline are deployed, it is real that drawing liquid pump connects pressure injection liquid
When the allotment water tank and modified medicine-chest of pressure injection liquid, current stabilization control valve is set between the modified water tank of pressure injection liquid and drawing liquid pump.
Preferably, data monitoring substation is separately positioned at multiple water injecting drillings, monitors the water injection pressure of water injecting drilling
And flow；Pressure injection liquid, which is deployed in real time in water tank, is provided with pressure injection fluid viscosity and pH value sensor.
Preferably, the modified medicine-chest of pressure injection liquid is provided with multiple, and the modified medicine-chest of multiple pressure injection liquid is arranged in juxtaposition, each pressure injection
Current stabilization control valve is provided on the outlet tube of the modified medicine-chest of liquid.
It may further be preferable that independently and not being connected between the modified medicine-chest of pressure injection liquid, in the modified medicine-chest of pressure injection liquid respectively
It is contained with thickener, lytic agent, friction reducer or surfactant.
It is also preferred that pressure injection liquid, which is deployed in real time in water tank, is additionally provided with pressure injection liquid blender, electric-controlled switch controls high pressure
The start and stop of water pump and drawing liquid pump.
It is also preferred that PLC controller is specially explosion-proof type industrial PLC controller, PLC controller directly controls current stabilization control
The work of valve, electric-controlled switch, flow control valve and pressure injection liquid blender processed, current stabilization control valve, electric-controlled switch, flow control valve and
Pressure injection liquid blender is additionally provided with hand control switch.
A kind of coal seam substep water-filling method, using a kind of above-mentioned coal seam substep water filling precisely controlling system, step includes:
Step A. fills the water the initial stage, and water injection hole pressure sensor and flow sensor monitor pressure P- in hole at this time
Injection flow Q curve persistently rises, and is formed and is built the pressure in water injection hole, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, obtains hole
Interior pressure P- injection flow Q curve issues control command to current stabilization control valve and electric-controlled switch, it is logical to open the first pressure injection liquid medicine-chest
It crosses drawing liquid pump and deploys water tank injection thickener in real time to pressure injection liquid, and start pressure injection liquid blender and be stirred, while passing through stream
Control valve continues to increase injection flow, and to improve the viscosity and pressure of pressure injection liquid, a plurality of water filling major fracture of breakdown simultaneously promotes
Secondary interstice extension；
Step B. seepage flow initial stage, the opening in seepage flow primary and secondary channel and the presence of high viscosity pressure injection liquid, so that at the beginning of seepage flow
Apparent fluctuations are presented in pressure P- injection flow Q curve in phase hole, and PLC controller receives the monitoring data of Monitor Sub-Station of Less,
Meet pressure P- injection flow Q curvilinear motion rule in seepage flow initial stage hole, PLC controller issues control command to pressure injection liquid and regulates and controls
Module, adds the second pressure injection liquid medicine-chest and lytic agent, friction reducer in the modified medicine-chest of third are increased with reducing pressure injection fluid viscosity
Mobility, and injection flow is continued to increase by flow control valve, expand water filling coverage；
Step C. coal seam permeability loses the stage, and with the progress of the injecting process, water ballast coal particle deposition, arch formation are wide
It is general be distributed in split-pore structure in, cause coal seam permeability to lose, pressure P- injection flow Q curve by smoothly turning again in hole
For fluctuations, PLC controller controls high-pressure hydraulic pump and flow control valve improves water injection pressure perturbation amplitude and frequency, dredging
Split-pore structure；
Step D. soaks the stage, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, when pressure P- is filled the water in obtained hole
Flow Q curve rises again, indicates that water is soaked under the double action of capillary force and surface tension in water injecting drilling,
PLC controller issues control command to pressure injection liquid and regulates and controls module, adds surfactant by the modified medicine-chest of the 4th pressure injection liquid, no
Gu disconnected reduce by two phase-contact surface interfacial surface tension of liquid-, increase water filling wetting effect.
The beneficial effect comprise that
(1) coal seam substep water filling precisely controlling system, includes flow sensor, pressure sensing by data monitoring module
Device, pressure injection fluid viscosity and pH value sensor and data Monitor Sub-Station of Less, realize the pressure to water injection hole and flood pattern, flow and
Pressure injection fluidity matter has carried out real-time monitoring, and carries out quantification treatment to it to by PLC controller and program language；Pass through
PLC controller control water filling control module, completes autonomous start and stop high-pressure hydraulic pump, changes injection flow, each process institute of control accurate
Pressure is needed, water filling coverage is expanded；In addition PLC controller control pressure injection liquid regulates and controls module, so that addition meets substep automatically
Improved chemical required for each stage in the injecting process improves coal seam permeability so as to improve the physical property of pressure injection liquid, increases
Fill the water wetting effect.System entire combination realizes the real-time monitoring and control of substep water injection pressure and flow, and provides each note
Optimal modified pressure injection liquid needed for the water stage completes coal-bed flooding control accurate, and then improves coal-bed flooding and take precautions against natural calamities effect.
(2) system passes through the modified medicine-chest of several pressure injection liquid and current stabilization control valve, the additive and note of real-time control water filling
Enter amount, pressure injection liquid deploys water tank in real time and pressure injection liquid blender is stirred it, according to real-time monitoring data, passes through PLC
Improved chemical needed for controller control water filling control module is quantitatively added, is deployed in advance, it is real-time to complete pressure injection liquid overall process
Linking, matches optimal pressure injection liquid physical-property parameter needed for each dynamic process.
(3) this method realizes note according to pressure P- injection flow Q curve and water injection time in the hole for filling the water each stage
Electric-controlled switch is coupled in the real-time adjustment of water pressure-flow, high-pressure hydraulic pump main line, configures flow control valve in water filling branch, point
It is not attached with PLC controller, realizes that the automatic start-stop of water injecting pump and injection flow, pressure are precisely controlled, to improve
The effect in wetting coal seam is strengthened in hydraulic fracturing.
Detailed description of the invention
Fig. 1 is coal seam substep water filling precisely controlling system schematic illustration；
Fig. 2 is coal seam substep water filling precisely controlling system system structure diagram；
Fig. 3 is pressure P- injection flow Q curve in the hole in embodiment 2；
In figure: the shaft bottom 1- tunnel, 2- pressure injection liquid deploy water tank, 3- pressure injection fluid viscosity and pH value sensor, 4-PLC control in real time
Device processed, 5- water injection pipe, 6- data monitoring substation, 7- water injection hole, the modified medicine-chest of 8- pressure injection liquid, 9- current stabilization control valve, 10- drawing liquid
Pump, 11- inlet pipeline, 12- high-pressure hydraulic pump, 13- electric-controlled switch, 14- flow control valve, 15- flow sensor, 16- pressure pass
Sensor.
Specific embodiment
In conjunction with shown in Fig. 1 to Fig. 3, a kind of coal seam substep water filling precisely controlling system and water-filling method tool provided by the invention
Body embodiment is as follows.
Embodiment 1
A kind of coal seam substep water filling precisely controlling system, the system include PLC controller, data monitoring module, water filling control
Molding block and pressure injection liquid regulate and control module, and PLC controller receives the monitoring data from data monitoring module, PLC controller control
Fill the water control module and the regulation module work of pressure injection liquid.The system is realized by data monitoring module to water injection hole and water filling system
Pressure, flow and the pressure injection fluidity matter of system have carried out real-time monitoring, and carry out to by PLC controller and program language to it
Quantification treatment；Water filling control module is controlled by PLC controller, autonomous start and stop high-pressure hydraulic pump is completed, changes injection flow, precisely
Pressure needed for regulating and controlling each process expands water filling coverage；In addition PLC controller control pressure injection liquid regulates and controls module, thus automatically
Addition meets improved chemical required for each stage in substep the injecting process, so as to improve the physical property of pressure injection liquid, improves coal
Layer permeability increases water filling wetting effect.
Wherein, data monitoring module includes flow sensor 15, pressure sensor 16, pressure injection fluid viscosity and pH value sensor
3, data monitoring substation 6 and connection line, acquisition monitoring data include in pressure, injection flow and the water tank in water injection hole in real time
The physical-property parameter of pressure injection liquid, monitoring data are transmitted to PLC controller 4 by connection line.Multiple data monitoring substations 6 divide
The water injection pressure and flow of water injecting drilling She Zhi not be monitored at multiple water injecting drillings.Each sensor of data monitoring module
It is connected by connection line with PLC controller 4, monitoring data is fed back.Pressure injection fluid viscosity and pH value sensor 3, for monitoring
Viscosity and pH value in the injecting process.
Filling the water control module includes high-pressure hydraulic pump 12, water injection pipe 5, check valve, flow control valve 14 and electric-controlled switch, high pressure
Water pump 12 is connected with water main, and check valve is provided on water main, is provided with flow control valve on each branch pipe of water main.It is high
Water pump 12 deploys water tank interior suction pressure fluid injection from pressure injection liquid in real time and is pumped to bore position, which can be real
When adjustment pumping pressure and flow, wherein electric-controlled switch also can control the opening and closing and working condition of high-pressure hydraulic pump.Water main
On be connected with check valve, prevent pressure injection liquid flow backwards, the branch for leading to multiple water injecting drillings is provided in the downstream of check valve.Wherein
Each water injecting drilling branch road is disposed with flow control valve, flow sensor and pressure sensor.
Pressure injection liquid regulation module includes that pressure injection liquid deploys the modified medicine-chest 8 of water tank 2, several pressure injection liquid, drawing liquid pump 10, steady in real time
Flow control valve 9 and inlet/outlet pipeline, drawing liquid pump 10 connect pressure injection liquid and deploy water tank and the modified medicine-chest of pressure injection liquid, pressure injection liquid in real time
Current stabilization control valve 9 is set between modified water tank 8 and drawing liquid pump 10.Pressure injection liquid, which is deployed in real time on water tank 2, to be provided with water inlet pipe and goes out
Water pipe is also equipped with current stabilization control valve 9 on water inlet pipe.Pressure injection liquid, which is deployed in real time in water tank 2, is provided with pressure injection fluid viscosity and pH value
Sensor 3, so as to the physical property situation of real-time monitoring pressure injection liquid.The modified medicine-chest 8 of pressure injection liquid is provided with multiple, multiple pressures
The modified medicine-chest 8 of fluid injection is arranged in juxtaposition, and is provided with current stabilization control valve 9 on the outlet tube of the modified medicine-chest of each pressure injection liquid.Pressure injection liquid
It is independent and be not connected between modified medicine-chest 8, be contained with respectively in the modified medicine-chest 8 of pressure injection liquid thickener, lytic agent, friction reducer or
The capacity of surfactant, each additive is determined according to actual applicable cases.Pressure injection liquid is deployed in water tank 2 in real time and is also set up
There is pressure injection liquid blender, guarantees that pressure injection liquid stirs evenly, electric-controlled switch controls the start and stop of high-pressure hydraulic pump and drawing liquid pump.
The system is by the modified medicine-chest 8 of several pressure injection liquid and current stabilization control valve 9, the additive and injection that real-time control fills the water
Amount, pressure injection liquid deploys water tank 2 in real time and pressure injection liquid blender is stirred it, according to real-time monitoring data, is controlled by PLC
Improved chemical needed for the control of device 4 water filling control module processed is quantitatively added, is deployed in advance, completes pressure injection liquid overall process and hold in the mouth in real time
It connects, matches optimal pressure injection liquid physical-property parameter needed for each dynamic process.
In addition, PLC controller is specially explosion-proof type industrial PLC controller, underground explosive environments, PLC controller 4 are adapted to
Directly control the work of current stabilization control valve 9, electric-controlled switch 13, flow control valve 14 and pressure injection liquid blender, current stabilization control valve 9,
Electric-controlled switch 13, flow control valve 14 and pressure injection liquid blender are additionally provided with hand control switch.The key of the system is to infuse
Pressure and flow parameter real-time monitoring and transmission in water hole, core are that realizing that quantitative model program word mentions is precisely controlled program
Depth logic operation.For this purpose, high-precision sensor is coupled using pressure gauge, and in the way of optical fiber connection Monitor Sub-Station of Less,
The variation of real-time monitoring water injection hole intrinsic parameter.Theoretical model and control sequence are converted PLC language by software based on programming simultaneously, will
It is written in the industrial PLC controller for carrying out serial ports connection with Monitor Sub-Station of Less, and the control axis as the set technology is, it can be achieved that note
The automatic identification and judgement, theoretical model depth logic operation that water drilling hole hydraulic pressure-flow real-time monitoring, water filling are segmented.
System entire combination realizes the real-time monitoring and control of substep water injection pressure and flow, and provides each water filling stage
Required optimal modified pressure injection liquid completes coal-bed flooding control accurate, and then improves coal-bed flooding and take precautions against natural calamities effect.
A kind of coal seam substep water-filling method, using a kind of above-mentioned coal seam substep water filling precisely controlling system, step includes:
Step A. fills the water the initial stage, and water injection hole pressure sensor and flow sensor monitor pressure P- in hole at this time
Injection flow Q curve persistently rises, and is formed and is built the pressure in water injection hole, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, obtains hole
Interior pressure P- injection flow Q curve issues control command to current stabilization control valve and electric-controlled switch, it is logical to open the first pressure injection liquid medicine-chest
It crosses drawing liquid pump and deploys water tank injection thickener in real time to pressure injection liquid, and start pressure injection liquid blender and be stirred, while passing through stream
Control valve continues to increase injection flow, and to improve the viscosity and pressure of pressure injection liquid, a plurality of water filling major fracture of breakdown simultaneously promotes
Secondary interstice extension.
Step B. seepage flow initial stage, the opening in seepage flow primary and secondary channel and the presence of high viscosity pressure injection liquid, so that at the beginning of seepage flow
Apparent fluctuations are presented in pressure P- injection flow Q curve in phase hole, and PLC controller receives the monitoring data of Monitor Sub-Station of Less,
Meet pressure P- injection flow Q curvilinear motion rule in seepage flow initial stage hole, PLC controller issues control command to pressure injection liquid and regulates and controls
Module, adds the second pressure injection liquid medicine-chest and lytic agent, friction reducer in the modified medicine-chest of third are increased with reducing pressure injection fluid viscosity
Mobility, and injection flow is continued to increase by flow control valve, expand water filling coverage.
Step C. coal seam permeability loses the stage, and with the progress of the injecting process, water ballast coal particle deposition, arch formation are wide
It is general be distributed in split-pore structure in, cause coal seam permeability to lose, pressure P- injection flow Q curve by smoothly turning again in hole
For fluctuations, PLC controller controls high-pressure hydraulic pump and flow control valve improves water injection pressure perturbation amplitude and frequency, dredging
Split-pore structure.
Step D. soaks the stage, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, when pressure P- is filled the water in obtained hole
Flow Q curve rises again, indicates that water is soaked under the double action of capillary force and surface tension in water injecting drilling,
PLC controller issues control command to pressure injection liquid and regulates and controls module, adds surfactant by the modified medicine-chest of the 4th pressure injection liquid, no
Gu disconnected reduce by two phase-contact surface interfacial surface tension of liquid-, increase water filling wetting effect.
This method realizes water filling according to pressure P- injection flow Q curve and water injection time in the hole for filling the water each stage
Electric-controlled switch is coupled in the real-time adjustment of pressure-flow, high-pressure hydraulic pump main line, configures flow control valve in water filling branch, respectively
It is attached with PLC controller, realizes that the automatic start-stop of water injecting pump and injection flow, pressure are precisely controlled, to improve water
It forces and splits, strengthen the effect in wetting coal seam.
Embodiment 2
On the basis of embodiment 1, the application for filling the water precisely controlling system to coal seam substep in conjunction with certain mine, to coal seam substep
The beneficial effect of water-filling method and coal seam substep water filling precisely controlling system is described in further detail.
Certain mine carries out coal seam substep water-filling method, utilizes a kind of above-mentioned coal seam substep water filling precisely controlling system, water filling
The step of include:
After the completion of the coal seam step 1 substep water filling precisely controlling system is arranged in tunnel, start to fill the water.
The initial stage is filled the water, water injection hole pressure sensor and flow sensor monitor pressure P- water injection manifold in hole at this time
Amount Q curve persistently rises, and builds the pressure due to being formed in water injection hole, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, is filled the water
Pressure P- injection flow Q curve in the hole of drilling, as shown in Figure 3.According to the concrete condition in the stage, PLC controller issues control
System order opens the first pressure injection liquid medicine-chest by drawing liquid pump and deploys water tank in real time to pressure injection liquid to current stabilization control valve and electric-controlled switch
Thickener is injected, and starts pressure injection liquid blender and is stirred, while pressure P- in hole is continued to increase by flow control valve and is infused
The injection flow for the respective bore that water flow Q curve persistently rises.The viscosity and pressure of pressure injection liquid are improved after change, breakdown is more
Item water filling major fracture simultaneously promotes secondary interstice to extend.
Step B. seepage flow initial stage, the opening in seepage flow primary and secondary channel and the presence of high viscosity pressure injection liquid, so that at the beginning of seepage flow
Apparent fluctuations are presented in pressure P- injection flow Q curve in phase hole, and PLC controller receives the monitoring data of Monitor Sub-Station of Less,
Meet pressure P- injection flow Q curvilinear motion rule in seepage flow initial stage hole, as shown in figure 3, PLC controller issues control command extremely
Pressure injection liquid regulates and controls module, the second pressure injection liquid medicine-chest and lytic agent, friction reducer in the modified medicine-chest of third is added, to reduce pressure injection liquid
Viscosity, the connected warm flow control valve of the first pressure injection liquid medicine-chest has been switched off at this time, and lytic agent, friction reducer can increase pressurized liquid injection
Mobility, and injection flow is continued to increase by the flow control valve on water inlet pipe and on water main branch pipe, expand water filling shadow
Ring range.
Step C. coal seam permeability loses the stage, and with the progress of the injecting process, water ballast coal particle deposition, arch formation are wide
It is general be distributed in split-pore structure in, cause coal seam permeability to lose, pressure P- injection flow Q curve by smoothly turning again in hole
For fluctuations, as shown in figure 3, PLC controller control high-pressure hydraulic pump and flow control valve improve water injection pressure perturbation amplitude and
- pore structure is split in frequency, dredging.
Step D. soaks the stage, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, when pressure P- is filled the water in obtained hole
Flow Q curve rises again, as shown in figure 3, indicating that water is under the double action of capillary force and surface tension in water injecting drilling
It is soaked, PLC controller issues control command to pressure injection liquid and regulates and controls module, adds surface by the modified medicine-chest of the 4th pressure injection liquid
Activating agent increases water filling wetting effect Gu constantly reducing by two phase-contact surface interfacial surface tension of liquid-.
Coal seam substep water-filling method overcomes the defects of control technology technique randomness is larger in the prior art, the reality provided
Applying method can satisfy and carry out coal-bed flooding under different mining area different geological conditions and take precautions against natural calamities the needs of operation, to improve coal seam note
Water prevents and treats Coal Mine Disasters effect and provides scientific guidance.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (7)
1. a kind of coal seam substep water filling precisely controlling system, which is characterized in that including PLC controller, data monitoring module, water filling
Control module and pressure injection liquid regulate and control module, and the PLC controller receives the monitoring data from data monitoring module, PLC control
Device control water filling control module and the regulation module work of pressure injection liquid；
The data monitoring module includes flow sensor, pressure sensor, pressure injection fluid viscosity and pH value sensor, data monitoring
Substation and connection line obtain the object that monitoring data include pressure in water injection hole, injection flow and water tank internal pressure fluid injection in real time
Nature parameters are managed, monitoring data are transmitted to PLC controller by connection line；
The water filling control module includes high-pressure hydraulic pump, water injection pipe, check valve, flow control valve and electric-controlled switch, high-pressure hydraulic pump
It is connected with water main, check valve is provided on water main, is provided with flow control valve on each branch pipe of water main；
The pressure injection liquid regulation module includes that pressure injection liquid deploys water tank, several pressure injection liquid modified medicine-chest, drawing liquid pump, current stabilization control in real time
Valve processed and inlet/outlet pipeline, the drawing liquid pump connection pressure injection liquid deploy water tank and the modified medicine-chest of pressure injection liquid, the pressure injection liquid in real time
Current stabilization control valve is set between modified water tank and drawing liquid pump.
2. a kind of coal seam substep water filling precisely controlling system according to claim 1, which is characterized in that the data monitoring
Substation is separately positioned at multiple water injecting drillings, monitors the water injection pressure and flow of water injecting drilling；The pressure injection liquid is deployed in real time
Pressure injection fluid viscosity and pH value sensor are provided in water tank.
3. a kind of coal seam substep water filling precisely controlling system according to claim 1, which is characterized in that the pressure injection liquid changes
Property medicine-chest be provided with multiple, the modified medicine-chests of multiple pressure injection liquid are arranged in juxtaposition, and are all provided on the outlet tube of the modified medicine-chest of each pressure injection liquid
It is equipped with current stabilization control valve.
4. a kind of coal seam substep water filling precisely controlling system according to claim 3, which is characterized in that the pressure injection liquid changes
Property medicine-chest between it is independent and be not connected to, be contained with thickener, lytic agent, friction reducer or surface respectively in the modified medicine-chest of pressure injection liquid
Activating agent.
5. a kind of coal seam substep water filling precisely controlling system according to claim 1, which is characterized in that the pressure injection liquid is real
When allotment water tank in be additionally provided with pressure injection liquid blender, the start and stop of electric-controlled switch the control high-pressure hydraulic pump and drawing liquid pump.
6. a kind of coal seam substep water filling precisely controlling system according to claim 1, which is characterized in that the PLC control
Implement body be explosion-proof type industrial PLC controller, PLC controller directly control current stabilization control valve, electric-controlled switch, flow control valve and
The work of pressure injection liquid blender, current stabilization control valve, electric-controlled switch, flow control valve and pressure injection liquid blender are additionally provided with manual control
System switch.
7. a kind of coal seam substep water-filling method, which is characterized in that utilize a kind of as claimed in any one of claims 1 to 66 described in any item coal seams point
Step water filling precisely controlling system, step include:
Step A. fills the water the initial stage, and water injection hole pressure sensor and flow sensor monitor that pressure P- is filled the water in hole at this time
Flow Q curve persistently rises, and is formed and is built the pressure in water injection hole, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, obtains hole internal pressure
Power P- injection flow Q curve issues control command to current stabilization control valve and electric-controlled switch, opens the first pressure injection liquid medicine-chest and pass through pumping
Liquid pump deploys water tank injection thickener to pressure injection liquid in real time, and starts pressure injection liquid blender and be stirred, while passing through flow control
Valve processed continues to increase injection flow, and to improve the viscosity and pressure of pressure injection liquid, a plurality of water filling major fracture of breakdown simultaneously promotes secondary
Crack propagation；
Step B. seepage flow initial stage, the opening in seepage flow primary and secondary channel and the presence of high viscosity pressure injection liquid, so that seepage flow initial stage hole
Apparent fluctuations are presented in interior pressure P- injection flow Q curve, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, meets
Pressure P- injection flow Q curvilinear motion rule in seepage flow initial stage hole, PLC controller issue control command to pressure injection liquid and regulate and control mould
Block, adds the second pressure injection liquid medicine-chest and lytic agent, friction reducer in the modified medicine-chest of third increase and flow to reduce pressure injection fluid viscosity
Dynamic property, and injection flow is continued to increase by flow control valve, expand water filling coverage；
Step C. coal seam permeability loses the stage, and with the progress of the injecting process, water ballast coal particle deposition, arch formation divide extensively
Be distributed in split-pore structure in, cause coal seam permeability to lose, pressure P- injection flow Q curve is by being smoothly returned in hole
Volt variation, PLC controller controls high-pressure hydraulic pump and flow control valve improves water injection pressure perturbation amplitude and frequency, and-hole is split in dredging
Gap structure；
Step D. soaks the stage, and PLC controller receives the monitoring data of Monitor Sub-Station of Less, when pressure P- injection flow in obtained hole
Q curve rises again, indicates that water is soaked under the double action of capillary force and surface tension in water injecting drilling, PLC control
Device processed issues control command to pressure injection liquid and regulates and controls module, adds surfactant by the modified medicine-chest of the 4th pressure injection liquid, constantly drops
Gu low two phase-contact surface interfacial surface tension of liquid-increases water filling wetting effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465931.1A CN110273702B (en) | 2019-05-31 | 2019-05-31 | Coal seam step-by-step water injection accurate control system and water injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465931.1A CN110273702B (en) | 2019-05-31 | 2019-05-31 | Coal seam step-by-step water injection accurate control system and water injection method |
Publications (2)
| Publication Number | Publication Date |
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| CN110273702A true CN110273702A (en) | 2019-09-24 |
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| CN113339044A (en) * | 2021-07-09 | 2021-09-03 | 山东科技大学 | Real-time monitoring and quick connecting device and method for working condition parameters in coal seam water injection hole |
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