A mine water curtain dust reduction climate online monitoring linkage system and method

Abstract

The invention discloses a coal mine water curtain dust reduction climate online monitoring linkage system and method. The system comprises a water curtain nozzle connected to a water vapor input main pipe. The water curtain nozzles are respectively arranged at a coal mining face, an air intake lane and a return air lane underground. Water vapor sprayed from the water curtain nozzle forms a water curtain at the coal mining face, a water curtain at the air intake lane and a water curtain at the return air lane. Dust concentration sensors, temperature sensors and humidity sensors are distributed on the coal mining face. A central controller is connected to the dust concentration sensor, the temperature sensor and the humidity sensor through an interface above the well. The output control of the central controller is respectively connected to a first control valve, a second control valve, a third control valve and a fourth control valve. The first control valve controls the first water curtain nozzle at the air intake lane, the second control valve controls the second water curtain nozzle at the air intake lane, the third control valve controls the water curtain nozzle at the coal mining face, and the fourth control valve controls the water curtain nozzle at the return air lane.

Description

Technical Field

[0001] The invention relates to a system and method for online monitoring linkage of water curtain dust reduction climate in a mine. Background Art

[0002] The dust condition in the coal mine tunnel is equivalent to the climate condition. Maintaining a good climate condition through spray dust reduction is a commonly used method. However, the tunnel includes the air intake tunnel, working face and return air tunnel. The current working state is only to monitor the dust concentration. Once the concentration is high, each tunnel will start spray dust reduction at the same time or stop spraying at the same time, and the flow rate is not controlled. The problem is that the dust concentration in each tunnel is reduced, but it may cause problems such as increased humidity and low temperature. Water resources cannot be fully and efficiently utilized, resulting in waste of water resources. Summary of the invention

[0003] The purpose of the present invention is to provide a system and method for online monitoring linkage of water curtain dust reduction climate in mines.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A coal mining water curtain dust reduction climate online monitoring linkage system comprises a water curtain nozzle connected to a water vapor input main pipe, the water curtain nozzles are respectively arranged at a coal mining face, an air intake lane and a return air lane underground, and water vapor ejected from the water curtain nozzles forms a water curtain at the coal mining face, a water curtain at the air intake lane and a water curtain at the return air lane, wherein the water curtain nozzle at the air intake lane is connected and arranged in two sections to form a first water curtain and a second water curtain spaced front and back, dust concentration sensors, temperature sensors and humidity sensors are distributed and arranged at the coal mining face, a central controller is connected to the dust concentration sensor, temperature sensor and humidity sensor through an interface above the well, and the output control of the central controller is respectively connected to a first control valve, a second control valve, a third control valve and a fourth control valve, the first control valve controls the first water curtain nozzle at the air intake lane, the second control valve controls the second water curtain nozzle at the air intake lane, the third control valve controls the water curtain nozzle at the coal mining face, and the fourth control valve controls the water curtain nozzle at the return air lane.

[0006] The plan is further that the interval between the first water curtain and the second water curtain in the air intake tunnel is not less than 50 meters, the second water curtain in the air intake tunnel is not more than 30 meters away from the coal mining face, and the water curtain formed by the water curtain nozzle in the return air tunnel is not more than 10 meters away from the coal mining face.

[0007] The solution is further as follows: the water vapor input main pipe is connected to the water curtain nozzle through an adjustable flow valve, and an output of the central controller controls the adjustable flow valve via an interface connection.

[0008] The solution is further as follows: the interface includes an intrinsically safe signal transfer terminal box arranged underground, and the sensor signal and the valve control signal are transferred to the relay station arranged at the entrance of the ground tunnel via the intrinsically safe signal transfer terminal box. The relay station is provided with a signal amplification circuit and a drive circuit. The signal amplification circuit amplifies the received sensor signal and transmits it to the central controller, and the drive circuit converts the valve control signal sent by the central controller into a high-power drive signal to drive each control valve.

[0009] A further solution is that the control valve is an intrinsically safe explosion-proof electromagnetic valve.

[0010] A method for online monitoring and linkage control of water curtain dust reduction climate in a mine, comprising the above-mentioned system, determining an underground climate comprehensive evaluation index Q, the underground climate comprehensive evaluation index Q being associated with underground dust concentration, temperature and humidity, wherein the dust concentration, temperature and humidity of an underground coal mining face are obtained in real time, the evaluation index Q value is calculated according to the dust concentration, temperature and humidity, when the Q value is lower than a lower limit setting value or higher than an upper limit setting value, the first control valve of the first water curtain of the air inlet lane, the second control valve of the first water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face and the fourth control valve of the water curtain of the return air lane are opened at intervals in an opening sequence, when the Q value is in a stable interval value, the first control valve of the first water curtain of the air inlet lane, the second control valve of the first water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face and the fourth control valve of the water curtain of the return air lane are closed at intervals in a closing sequence;

[0011] in:

[0012] Comprehensive climate evaluation index Q=A (X / 4)+B (Y / 50)+C(Z / 18);

[0013] in:

[0014] X represents dust concentration, unit: mg / m 3 ;

[0015] Y represents humidity, unit: %;

[0016] Z represents temperature, unit: °C;

[0017] A represents the dust weight coefficient;

[0018] B represents the humidity weight coefficient;

[0019] C represents the temperature weighting coefficient.

[0020] The scheme is further as follows: the dust weight coefficient is 3 / 5, the humidity weight coefficient is 1 / 5, the temperature weight coefficient is 1 / 5, the lower limit setting value is 0.327, the upper limit setting value is 1.062, the stable interval value is between 0.327 and 1.062, and the opening sequence is the third control valve of the water curtain of the coal mining face, the second control valve of the second water curtain of the air inlet lane, the first control valve of the first water curtain of the air inlet lane, and the fourth control valve of the water curtain of the return air lane; the closing sequence is the first control valve of the first water curtain of the air inlet lane, the second control valve of the second water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face, and the fourth control valve of the water curtain of the return air lane;

[0021] in:

[0022] Each interval in the opening sequence is at least 30 seconds. During the interval, the Q value is continuously obtained. When the change of the Q value is higher than the lower limit setting value or lower than the upper limit setting value, the interval time is extended until the Q value is lower than the lower limit setting value or higher than the upper limit setting value again, and the next control valve is opened in sequence;

[0023] Each interval in the closing sequence is at least 30 seconds. The Q value continues to be obtained during the interval. When the change of the Q value exceeds the stable interval value, the control valve that has just been closed is reopened to extend the interval time until the Q value remains in the stable interval, and the control valve is closed again in sequence.

[0024] The solution is further that an alarm is triggered when the dust concentration is greater than 4, the temperature is less than 15 or greater than 20, and the humidity is less than 40 or greater than 60.

[0025] The solution is further that: the method further includes continuously acquiring the evaluation index Q value, and converting the continuously acquired evaluation index Q value into a curve that changes with time and outputting and saving it.

[0026] The scheme is further as follows: the water vapor input main pipe is connected to the water curtain nozzle through an adjustable flow valve, an output connection of the central controller controls the adjustable flow valve, and the method further includes: when the humidity is greater than 50 and continues to rise, controlling the adjustable flow valve to reduce the water vapor input.

[0027] The beneficial effects of the present invention are as follows: by setting dust concentration sensors, temperature sensors and humidity sensors on the working face, the controller analyzes the three sensor signals into different environmental conditions, and starts or stops the spraying of different tunnels in different sequences through the electromagnetic switches connected to the controller output, including controlling the flow rate, realizing automatic start and stop of the water curtain system, avoiding human operation, and reducing the labor intensity of workers; realizing online monitoring of the working face climate and improving the working comfort of workers; sequential start and stop of the water curtain can efficiently utilize water resources, and can be expanded to all tunnels as a unit of the system to realize the mutual linkage of all water curtains in the entire mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of this embodiment, it should be noted that the terms "connect" and "placed" should be understood in a broad sense. For example, "connect" can be a wire connection or a mechanical connection; "placed" can be a fixed connection placement or an integral placement. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0031] A mine water curtain dust reduction climate online monitoring linkage system, such as Figure 1 As shown, the online monitoring linkage system includes a water curtain nozzle 2 connected to the water vapor input main pipe 1, and the water curtain nozzle is arranged at the coal mining face 3, the air intake tunnel 4 and the return air tunnel 5 in the mine through branch pipes. The water vapor sprayed from the water curtain nozzle forms a water curtain at the coal mining face, a water curtain at the air intake tunnel and a water curtain at the return air tunnel. Among them, the branch pipes of the water curtain nozzle in the air intake tunnel are divided into 201 and 202, which are connected and arranged in two sections to form a first water curtain and a second water curtain separated from each other in front and back. The branch pipe 203 is arranged at the coal mining face 3, and the branch pipe 204 is arranged at the return air tunnel 5. Dust concentration sensors 6, temperature sensors 7 and Humidity sensor 8, a central controller 9 is connected to the dust concentration sensor 6, the temperature sensor 7 and the humidity sensor 8 through an interface on the well, and the output control of the central controller 9 is respectively connected to the first control valve 10, the second control valve 11, the third control valve 12, and the fourth control valve 13. The first control valve controls the first water curtain nozzle of the branch pipe of the water curtain nozzle of the air intake lane, the second control valve controls the second water curtain nozzle of the branch pipe of the water curtain nozzle of the air intake lane, the third control valve controls the water curtain nozzle of the branch pipe of the water curtain nozzle of the coal mining working face, and the fourth control valve controls the water curtain nozzle of the branch pipe of the water curtain nozzle of the return air lane.

[0032] Among them, the interface includes an intrinsically safe signal transfer terminal box 14 set up underground, and the sensor signal and the valve control signal are transferred to the relay station 15 set up at the entrance of the ground tunnel through the intrinsically safe signal transfer terminal box. The relay station is provided with an independent power supply, and the relay station is provided with a signal amplification circuit and a drive circuit. The signal amplification circuit amplifies the received sensor signal and transmits it to the central controller, and the drive circuit converts the valve control signal sent by the central controller into a high-power drive signal to drive each control valve.

[0033] The interval between the first water curtain and the second water curtain in the air intake tunnel is not less than 50 meters, the second water curtain in the air intake tunnel is not more than 30 meters away from the coal mining working face, and the water curtain formed by the water curtain nozzle in the return air tunnel is not more than 10 meters away from the coal mining working face.

[0034] In order to control the water vapor flow rate: the water vapor input main pipe 1 is connected to the water curtain nozzle through an adjustable flow valve 16, and an output of the central controller controls the adjustable flow valve through an interface connection.

[0035] For safety reasons, the control valves mentioned above are all intrinsically safe explosion-proof electromagnetic valves.

[0036] Based on the control method of the above-mentioned mine water curtain dust reduction climate online monitoring linkage system, the relevant suitable working conditions of the underground working area of ​​the coal mine are consulted, among which: the suitable range of dust concentration is {0, 4, unit: mg / m 3}, the suitable range of humidity is {40, 60, unit: %}, the suitable range of temperature is {15, 20, unit: ℃}, a comprehensive evaluation index Q of underground climate is determined by comprehensively considering the correlation between the working environment of the coal mine tunnel and the dust concentration, temperature and humidity, and the dust concentration, temperature and humidity of the underground coal mining face are obtained in real time. The evaluation index Q value is calculated according to the dust concentration, temperature and humidity. When the Q value is lower than the lower limit setting value or higher than the upper limit setting value, the first control valve of the first water curtain of the air inlet lane, the second control valve of the first water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face and the fourth control valve of the water curtain of the return air lane are opened in an opening sequence. When the Q value is in a stable interval value, the first control valve of the first water curtain of the air inlet lane, the second control valve of the second water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face and the fourth control valve of the water curtain of the return air lane are closed in a closing sequence;

[0037] in:

[0038] Comprehensive climate evaluation index Q=A (X / 4)+B (Y / 50)+C(Z / 18);

[0039] in:

[0040] X represents dust concentration, unit: mg / m 3 ;

[0041] Y represents humidity, unit: %;

[0042] Z represents temperature, unit: °C;

[0043] A represents the dust weight coefficient;

[0044] B represents the humidity weight coefficient;

[0045] C represents the temperature weighting coefficient.

[0046] As a preferred solution, the dust weight coefficient is 3 / 5, the humidity weight coefficient is 1 / 5, the temperature weight coefficient is 1 / 5, the lower limit setting value is 0.327, the upper limit setting value is 1.062, and the stable interval value is between 0.327 and 1.062.

[0047] The opening sequence is the third control valve of the water curtain of the coal mining face, the second control valve of the second water curtain of the air inlet lane, the first control valve of the first water curtain of the air inlet lane, and the fourth control valve of the water curtain of the return air lane; the closing sequence is the first control valve of the first water curtain of the air inlet lane, the second control valve of the second water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face, and the fourth control valve of the water curtain of the return air lane;

[0048] in:

[0049] Each interval in the opening sequence is at least 30 seconds. During the interval, the Q value is continuously obtained. When the change of the Q value is higher than the lower limit setting value or lower than the upper limit setting value, the interval time is extended until the Q value is lower than the lower limit setting value or higher than the upper limit setting value again, and the next control valve is opened in sequence;

[0050] Each interval in the closing sequence is at least 30 seconds. The Q value continues to be obtained during the interval. When the change of the Q value exceeds the stable interval value, the control valve that has just been closed is reopened to extend the interval time until the Q value remains in the stable interval, and the control valve is closed again in sequence.

[0051] Wherein: an alarm is triggered when the dust concentration is greater than 4, the temperature is less than 15 or greater than 20, and the humidity is less than 40 or greater than 60. The method further includes continuously acquiring the evaluation index Q value, and outputting the continuously acquired evaluation index Q value as a curve that changes over time and saving it for easy query.

[0052] Wherein: the water vapor input main pipe is connected to the water curtain nozzle through an adjustable flow valve, an output connection of the central controller controls the adjustable flow valve, and the method further includes: when the humidity is greater than 50 and continues to rise, controlling the adjustable flow valve to reduce the water vapor input.

[0053] The above embodiment sets up dust concentration sensors, temperature sensors and humidity sensors on the working face. The controller analyzes the three sensor signals into different environmental conditions, and starts or stops the spraying of different tunnels in different sequences through the electromagnetic switches connected to the controller output, including controlling the flow rate, realizing automatic start and stop of the water curtain system, avoiding human operation, and reducing the labor intensity of workers; realizing online monitoring of the working face climate and improving the working comfort of workers; sequential start and stop of the water curtain can efficiently utilize water resources, and can be expanded to all tunnels as a unit of the system to realize the mutual linkage of all water curtains in the entire mine.

Claims

1. A method for online monitoring linkage control of water curtain dust reduction climate in a mine, comprising an online monitoring linkage system for water curtain dust reduction climate in a mine, the system comprising a water curtain nozzle connected to a water vapor input main pipe, the water curtain nozzles are arranged at the coal mining face, air intake lane and return air lane in the mine, respectively, the water vapor sprayed from the water curtain nozzle forms a water curtain at the coal mining face, a water curtain at the air intake lane and a water curtain at the return air lane, characterized in that: The water curtain nozzles in the air intake lane are connected and arranged in two sections to form a first water curtain and a second water curtain separated by a front and rear interval. Dust concentration sensors, temperature sensors and humidity sensors are distributed and arranged on the coal mining face. A central controller is connected to the dust concentration sensor, temperature sensor and humidity sensor through an interface on the well. The output control of the central controller is respectively connected to the first control valve, the second control valve, the third control valve and the fourth control valve. The first control valve controls the first water curtain nozzle of the air intake lane, the second control valve controls the second water curtain nozzle of the air intake lane, the third control valve controls the water curtain nozzle of the coal mining face, and the fourth control valve controls the water curtain nozzle of the return air lane. The distance between the first water curtain and the second water curtain in the air inlet lane is not less than 50 meters, the distance between the second water curtain in the air inlet lane and the coal mining face is not more than 30 meters, and the distance between the water curtain formed by the water curtain nozzle in the return air lane and the coal mining face is not more than 10 meters; Determine an underground climate comprehensive evaluation index Q, which is associated with underground dust concentration, temperature and humidity, obtain the dust concentration, temperature and humidity of the underground coal mining face in real time, calculate the evaluation index Q value according to the dust concentration, temperature and humidity, and when the Q value is lower than the lower limit setting value or higher than the upper limit setting value, the first control valve of the first water curtain of the air inlet lane, the second control valve of the first water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face and the fourth control valve of the water curtain of the return air lane are opened at intervals in an opening sequence; when the Q value is in a stable interval value, the first control valve of the first water curtain of the air inlet lane, the second control valve of the first water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face and the fourth control valve of the water curtain of the return air lane are closed at intervals in a closing sequence; in: Comprehensive climate evaluation index Q = A (X / 4) + B (Y / 50) + C (Z / 18); Where: X represents dust concentration, unit: mg / m 3 ; Y represents humidity, unit: %; Z represents temperature, unit: °C; A represents the dust weight coefficient; B represents the humidity weight coefficient; C represents the temperature weight coefficient; where: The dust weight coefficient is 3 / 5, the humidity weight coefficient is 1 / 5, the temperature weight coefficient is 1 / 5, the lower limit setting value is 0.327, the upper limit setting value is 1.062, and the stable interval value is between 0.327 and 1.

062. The opening sequence is the third control valve of the water curtain of the coal mining face, the second control valve of the second water curtain of the air inlet lane, the first control valve of the first water curtain of the air inlet lane, and the fourth control valve of the water curtain of the return air lane; the closing sequence is the first control valve of the first water curtain of the air inlet lane, the second control valve of the second water curtain of the air inlet lane, the third control valve of the water curtain of the coal mining face, and the fourth control valve of the water curtain of the return air lane; in: Each interval in the opening sequence is at least 30 seconds. During the interval, the Q value is continuously obtained. When the change of the Q value is higher than the lower limit setting value or lower than the upper limit setting value, the interval time is extended until the Q value is lower than the lower limit setting value or higher than the upper limit setting value again, and the next control valve is opened in sequence; Each interval in the closing sequence is at least 30 seconds. The Q value continues to be obtained during the interval. When the change of the Q value exceeds the stable interval value, the control valve that has just been closed is reopened to extend the interval time until the Q value remains in the stable interval, and the control valve is closed again in sequence.

2. The method according to claim 1, characterized in that An alarm will be triggered when the dust concentration is greater than 4, the temperature is less than 15 or greater than 20, and the humidity is less than 40 or greater than 60.

3. The method according to claim 1, characterized in that The method further comprises continuously acquiring the evaluation index Q value, and outputting and saving the continuously acquired evaluation index Q value as a curve changing with time.

4. The method according to claim 1, characterized in that: The water vapor input main pipe is connected to the water curtain nozzle through an adjustable flow valve, and an output connection of the central controller controls the adjustable flow valve. The method further includes: when the humidity is greater than 50 and continues to rise, controlling the adjustable flow valve to reduce the water vapor input.

5. The method according to claim 1, characterized in that The water vapor input main pipe is connected to the water curtain nozzle through an adjustable flow valve, and an output of the central controller controls the adjustable flow valve through an interface connection.

6. The method according to claim 1, characterized in that The interface includes an intrinsically safe signal transfer terminal box set up underground. The sensor signal and the valve control signal are transferred to the relay station set up at the entrance of the ground tunnel through the intrinsically safe signal transfer terminal box. The relay station is provided with a signal amplification circuit and a drive circuit. The signal amplification circuit amplifies the received sensor signal and transmits it to the central controller. The drive circuit converts the valve control signal sent by the central controller into a high-power drive signal to drive each control valve.

7. The method according to claim 1, characterized in that The control valve is an intrinsically safe explosion-proof electromagnetic valve.

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