Online monitoring system and method for underground coal mine dustproof equipment

Abstract

The invention relates to an online monitoring system and method for underground coal mine dustproof equipment, and belongs to the technical field of mine dust removal. The system comprises a dustproof equipment on-line monitoring platform, an underground coal mine industry ring network, a switch, a dustproof equipment monitoring substation, a dust concentration sensor, a fully-mechanized face dust source tracking and dust falling system, a fully-mechanized face intelligent dust removing system and a roadway automatic watering and dust falling system. Data, operation parameters and dust concentration of each piece of dustproof equipment are monitored in real time, and comprehensive detection is realized; operation parameters of dustproof equipment are automatically calculated and adjusted, and the dust falling efficiency is improved; the automatic watering and dust falling system for the fully-mechanized face, the fully-mechanized excavation face and the roadway can intelligently control dust removal according to environmental parameters, and manual intervention is reduced; the dust concentration is reduced, the dust accident risk is reduced, and the mine safety production level is improved; the intelligent management of the dustproof equipment is realized; the problems that current underground coal mine dustproof equipment is less in monitoring information, weak in intelligent regulation and control capability and lagged in supervision are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mine dust removal, and in particular relates to an online monitoring system for underground coal mine dust prevention equipment, and also relates to an online monitoring method for underground coal mine dust prevention equipment. Background Art

[0002] Dust is a major disaster factor that cannot be ignored in the working environment of underground coal mines. It has long been a threat to the health of coal mine workers and a great challenge to the safe production and standardized management of enterprises. In the process of coal mining, dust mainly comes from coal mining faces, excavation faces and transfer points of transportation tunnels. These areas have become key areas for dust breeding due to high work intensity and frequent mechanical operations. Dust not only harms the respiratory health of workers and increases the risk of occupational diseases such as pneumoconiosis, but may also cause explosion accidents, posing a major threat to the safe production of mines.

[0003] In order to effectively deal with the dust problem, most coal mining companies have introduced dust concentration sensor technology to achieve real-time monitoring of dust concentration in the workplace. These sensors can accurately capture the number of dust particles in the air and provide managers with timely and accurate dust concentration data, which helps to respond quickly and take measures. At the same time, coal mines are also equipped with a variety of dust prevention equipment, such as spray dust reduction systems, dust removal fans, wet dust collectors, etc., which effectively reduce the dust content in the air through physical or chemical means to ensure that the dust concentration is maintained below the safety standard.

[0004] However, there is a close connection between the operating efficiency of dust control equipment and the effect of reducing dust concentration, and the dust concentration in coal mines is affected by many factors, such as geological conditions, mining intensity, ventilation conditions, etc., and changes very irregularly. Therefore, in order to achieve the best dust reduction effect, it is necessary to flexibly adjust the operating parameters of dust control equipment according to actual conditions. However, most of the current dust control equipment is still in an independent operation state, lacking an intelligent monitoring and control mechanism. As a result, the parameter adjustment of dust control equipment often needs to rely on manual operation by workers, which is not only complicated and cumbersome, but also time-consuming, and it is difficult to ensure the accuracy and timeliness of the adjustment. In addition, due to the failure to effectively integrate and intelligently analyze the real-time monitoring data of the operating status of dust control equipment and dust concentration, the supervision of dust safety status is lagging. This not only increases the risk of dust accidents, but also makes it difficult to meet the urgent needs of intelligent and information-based dust control in coal mines. Therefore, the real-time monitoring and automatic adjustment technology of the operating parameters of dust control equipment and the realization of intelligent management of dust control equipment have become key issues to be solved in the field of coal mine dust control. Summary of the invention

[0005] In view of this, the purpose of the present invention is to solve the current problems of less monitoring information of underground coal mine dust prevention equipment, weak intelligent control ability of dust prevention equipment and lagging supervision. To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An online monitoring system for dust prevention equipment in underground coal mines, comprising:

[0007] The online monitoring platform for dust prevention equipment communicates data with the switch through the underground coal mine industrial ring network;

[0008] The switch converts the data signal sent by the dust-proof equipment monitoring substation into a network signal and forwards it to the corresponding dust-proof equipment monitoring substation;

[0009] The dust prevention equipment monitoring substation realizes real-time monitoring and control of the data and operating parameters of each dust prevention equipment; it communicates data with the dust concentration sensor, the dust source tracking and dust reduction system of the fully mechanized mining face, the intelligent dust removal system of the fully mechanized excavation face, and the automatic water sprinkling and dust reduction device in the tunnel;

[0010] Dust concentration sensor, real-time monitoring of dust concentration in underground coal mine dust workplaces;

[0011] The dust source tracking and dust reduction system of the fully mechanized mining face can automatically detect the position of the shearer when the shearer is cutting coal, and turn on or off the spray on the corresponding brackets of the front and rear rollers of the shearer in sequence according to the moving direction of the shearer, so that the front and rear rollers of the shearer are within the control range of the high-pressure spray;

[0012] The intelligent dust removal system for the fully-mechanized excavation face automatically monitors the environmental parameters of the working face when the tunneling machine is working in the fully-mechanized excavation working face of the underground coal mine; then the dust removal system is intelligently controlled to move forward and start and stop the dust collector according to the environmental parameters of the working face;

[0013] The automatic water sprinkling and dust reduction system in the tunnel automatically monitors the belt operation conditions in the belt transport tunnel and the dust concentration in the return air tunnel of the underground coal mine, and automatically controls the spray dust reduction.

[0014] Furthermore, the dust prevention equipment online monitoring platform includes:

[0015] The data acquisition module collects the data and operating parameters of each dust prevention device stored in the dust prevention device monitoring substation regularly through the underground coal mine industrial ring network and switches;

[0016] The data analysis module analyzes the dust concentration and the data and operating parameters of each dust prevention device to determine whether the dust reduction efficiency and operating parameters match. If not, it automatically calculates the operating parameters that need to be adjusted.

[0017] Data statistics module, which summarizes and counts the operation status of each dust prevention equipment;

[0018] The automatic control module sends the operating parameters that need to be adjusted to the monitoring substation corresponding to the dust prevention equipment.

[0019] Furthermore, the dust prevention equipment monitoring substation has the following functions:

[0020] Data collection function: sending collection instructions to each dust-proof device, receiving reply instructions from the dust-proof device, parsing the reply instructions, determining the data and operating parameters of each dust-proof device, and storing and displaying them;

[0021] Data upload function: after receiving the collection instruction issued by the platform, the stored data and operating parameters of each dust prevention device are packaged and sent to the platform;

[0022] The operating parameter modification forwarding function sends the operating parameter modification instruction to the corresponding dust prevention device after receiving the operating parameter modification instruction issued by the platform.

[0023] Furthermore, the dust source tracking and dust reduction system for the comprehensive mining face includes: a filter for filtering the spray water transported in the high-pressure water pipe; an electric valve for controlling the spray rack; spray; a high-pressure water pipe for transporting the spray water; a spray control box for receiving the signal of the coal mining machine positioning receiver, sending the current coal mining machine position information to other spray control boxes and controlling the switch electric valve according to the set system parameters; a coal mining machine positioning receiver installed on the hydraulic support column, after receiving the infrared signal, sending the information to the corresponding spray control box; a coal mining machine positioning transmitter installed on the coal mining machine body, sending infrared signals to the outside; a remote control for numbering the spray control box and setting the operating parameters, including: the number of sprays opened on the upwind side of the coal mining machine, the number of spray intervals for measuring the upwind of the coal mining machine, the number of sprays opened on the downwind side of the coal mining machine, the number of spray intervals for measuring the downwind of the coal mining machine, the distance between the spray control boxes and the spray time.

[0024] Furthermore, the intelligent dust removal system for the comprehensive excavation face includes: a zone controller and a distance measuring sensor, a dust concentration sensor, a methane sensor, an air volume sensor, a monorail crane system, a valve electric device, a frequency converter and a dust collector connected thereto; the zone controller collects data from the distance measuring sensor in real time to control the action of the monorail crane system, collects data from the methane sensor and the dust concentration sensor in real time to control the frequency converter and the dust collector, and collects data from the air volume sensor in real time to control the valve electric device.

[0025] Furthermore, the automatic water sprinkling and dust reduction system in the alley includes: a filter, an electric valve, a spray rack, a high-pressure water pipe, a spray control box, a remote control, a dust concentration sensor, a belt touch sensor, and a light control sensor; the spray control box obtains data from the dust concentration sensor, the belt touch sensor, and the light control sensor in real time to control the opening and closing of the electric valve to adjust the spray.

[0026] A method for online monitoring of dust prevention equipment in underground coal mines, comprising the following steps:

[0027] Use the dust prevention equipment online monitoring platform to communicate data with the switch through the underground coal mine industrial ring network;

[0028] Use the switch to convert the data signal sent by the dust-proof equipment monitoring substation into a network signal and forward it to the corresponding dust-proof equipment monitoring substation;

[0029] The dust prevention equipment monitoring substation is used to monitor and control the data and operating parameters of each dust prevention equipment in real time; data communication is carried out with dust concentration sensors, dust source tracking and dust reduction systems for fully mechanized mining faces, intelligent dust removal systems for fully mechanized excavation faces, and automatic water sprinkling and dust reduction devices in tunnels;

[0030] Use dust concentration sensors to monitor dust concentration in underground coal mines in real time;

[0031] When the shearer is cutting coal in the fully-mechanized working face of an underground coal mine, the fully-mechanized face dust source tracking and dust reduction system is used to automatically detect the position of the shearer and turn on or off the spray, so that the front and rear rollers of the shearer are within the control range of the high-pressure spray;

[0032] When the tunneling machine is working at the fully-mechanized excavation face of an underground coal mine, the fully-mechanized excavation face intelligent dust removal system is used to automatically monitor the environmental parameters of the working face, and the dust removal system is intelligently controlled to move forward and start and stop the dust collector according to the environmental parameters of the working face;

[0033] The automatic water sprinkling and dust reduction system in the tunnel is used to automatically monitor the belt operation conditions in the belt transport tunnel and the dust concentration in the return air tunnel of the underground coal mine, and automatically control the switch of the electric valve to control the spray dust reduction.

[0034] Further, the steps of using the fully mechanized mining face dust source tracking and dust reduction system to automatically detect the position of the coal mining machine to turn on or off the spray, so that the front and rear rollers of the coal mining machine are within the control range of the high-pressure spray, are specifically as follows:

[0035] After the coal mining machine positioning receiver receives the infrared signal sent outward by the coal mining machine positioning transmitter, it sends the information to the corresponding spray control box;

[0036] The spray control box sends the current coal mining machine position information to other spray control boxes;

[0037] After receiving the current coal mining machine position information, all spray control boxes determine whether they need to open the electric valve according to the set system parameters;

[0038] After opening the electric valve, start the countdown according to the set spray time, and close the electric valve after the countdown ends.

[0039] Furthermore, the intelligent dust removal system of the fully mechanized excavation face is used to automatically monitor the environmental parameters of the working face, and the steps of intelligently controlling the forward movement of the dust removal system and the start and stop of the dust collector according to the environmental parameters of the working face are specifically as follows:

[0040] Set working face environment parameters, including: distance limit L from the front S , Dust concentration exceeds the limit value C S 、Methane exceeds limit value A S ;

[0041] Assume that the real-time value of the distance between the comprehensive excavation face and the head is L. When L ≥ L S When L < , the monorail crane system is controlled to start moving; when L < , the monorail crane system is controlled to stop moving;

[0042] Assume that the real-time value of methane is A. When A≥A S When the inverter output is controlled, the dust collector is turned off;

[0043] Assume that the real-time value detected by a dust concentration sensor is C2. When C2 ≥ C S When the inverter output is controlled, the dust collector is turned on;

[0044] Assume that the real-time value of another dust concentration sensor is C1, and the dust reduction efficiency η= / C1×100%; when the dust reduction efficiency η<90%, control the inverter output, increase the frequency, and increase the dust collector power; when the dust reduction efficiency η>95%, control the inverter output and restore to the initial frequency value;

[0045] Assume that the real-time value of one air volume sensor is Q1, and the real-time value of another air volume sensor is Q2, and the axial radial air volume ratio K = Q2 / ×100%; when K>0.8, control the valve electric device to make its internal baffle rotate clockwise; when K≤0.7, control the valve electric device to make its internal baffle rotate counterclockwise.

[0046] Furthermore, the automatic water sprinkling dust reduction system in the laneway is used to automatically monitor the belt operation of the belt transport lane and the dust concentration of the return air lane in the underground coal mine, and automatically control the switch of the electric valve to control the spray dust reduction steps, specifically:

[0047] Set system operating parameters, including: working mode, dust concentration limit value C S and countdown time T;

[0048] Assume that the real-time monitoring dust concentration value of the dust concentration sensor is C. If C ≥ C S Or when the belt touch sensor has a signal, the spray control box controls the electric valve to open to start spraying; if C<C S Or when there is no signal from the belt touch sensor, the spray control box controls the electric valve to close to stop spraying;

[0049] While the electric valve is open, if the light control signal of the light control sensor is detected, the spray control box controls the electric valve to close to stop spraying, and starts a countdown of duration T. After the countdown ends, the spray control box controls the electric valve to open to start spraying.

[0050] The beneficial effects of the present invention are:

[0051] Real-time monitoring of the data, operating parameters and dust concentration of each dust prevention equipment to achieve comprehensive detection; automatic calculation and adjustment of the operating parameters of the dust prevention equipment to improve dust reduction efficiency; the automatic water sprinkling dust reduction system for comprehensive mining faces, comprehensive excavation faces and tunnels can intelligently control dust removal according to environmental parameters to reduce manual intervention; reduce dust concentration, reduce the risk of dust accidents, and improve the safety level of mine production; realize the intelligent management of dust prevention equipment; solve the current problems of less monitoring information of dust prevention equipment in underground coal mines, weak intelligent control capabilities of dust prevention equipment and lagging supervision.

[0052] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0054] Figure 1 An online monitoring system for dust prevention equipment in underground coal mines according to an embodiment of the present invention;

[0055] Figure 2 A diagram of a dust source tracking and dust reduction system for a fully mechanized mining face according to an embodiment of the present invention;

[0056] Figure 3 A diagram of an intelligent dust removal system for a comprehensive excavation face according to an embodiment of the present invention;

[0057] Figure 4 A diagram of an automatic watering and settling system for a laneway according to an embodiment of the present invention;

[0058] Figure markings: 1-filter, 2-electric valve, 3-spray rack, 4-high-pressure water pipe, 5-spray control box, 6-coal mining machine positioning receiver, 7-coal mining machine positioning transmitter, 8-remote control, 9-dust concentration sensor, 10-belt touch sensor, 11-light control sensor. DETAILED DESCRIPTION

[0059] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0060] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0061] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0062] In order to solve the current problems of less monitoring information of dust prevention equipment in underground coal mines, weak intelligent control capability of dust prevention equipment and lagging supervision, the present invention provides an online monitoring system for dust prevention equipment in underground coal mines. Figure 1 , which is an online monitoring system for underground coal mine dust prevention equipment in an embodiment of the present invention, mainly includes: an online monitoring platform for dust prevention equipment, an underground coal mine industrial ring network, a switch, a dust prevention equipment monitoring substation, a dust concentration sensor, a fully mechanized mining face dust source tracking and dust reduction system, a fully mechanized mining face intelligent dust removal system, and a tunnel automatic watering and dust reduction system. The number of switches is N, 1≤N≤8, and the number of dust prevention equipment monitoring substations is M, 1≤M≤16.

[0063] The online monitoring platform for dust prevention equipment communicates data with the switch through the underground coal mine industrial ring network;

[0064] Switch, data forwarding and communication management, it communicates with the dustproof equipment monitoring substation, the data communication standard is RS485;

[0065] The dust prevention equipment monitoring substation realizes real-time monitoring and control of the data and operating parameters of each dust prevention equipment, and communicates data with the dust concentration sensor, the dust source tracking and dust reduction system of the comprehensive mining face, the intelligent dust removal system of the comprehensive excavation face, and the automatic water sprinkling and dust reduction device in the tunnel through the RS485 communication standard.

[0066] The dust prevention equipment online monitoring platform includes: data acquisition module, data analysis module, data statistics module and automatic control module.

[0067] The data acquisition module collects the data and operating parameters of each dust prevention device stored in the dust prevention device monitoring substation regularly through the underground coal mine industrial ring network and switches;

[0068] The data analysis module analyzes the dust concentration and the data and operating parameters of each dust prevention device to determine whether the dust reduction efficiency and operating parameters match. If not, it automatically calculates the operating parameters that need to be adjusted.

[0069] The data statistics module summarizes and counts the operation status of each dust prevention equipment (normal, faulty, adjusted, etc.);

[0070] The automatic control module sends the operating parameters that need to be adjusted to the monitoring substation corresponding to the dust prevention equipment.

[0071] The switch converts the RS485 signal of the dust-proof equipment monitoring substation into a network signal, and ensures that the data is forwarded to the corresponding dust-proof equipment monitoring substation through the set IP address and port number.

[0072] The dust prevention equipment monitoring substation has data collection function, data upload function, and operation parameter modification and forwarding function.

[0073] The data collection function is to send the collection command to each dust-proof device, then receive the reply command from the dust-proof device, and then analyze the reply command to determine the data and operating parameters of each dust-proof device and store and display them;

[0074] The data upload function is to package and send the stored data and operating parameters of each dust prevention device to the platform after receiving the collection command issued by the platform;

[0075] The operation parameter modification forwarding function is to send the operation parameter modification instruction sent by the platform to the corresponding dust prevention device after receiving the instruction.

[0076] Dust concentration sensor, real-time monitoring of dust concentration in underground coal mine dust workplaces, its working principle can be light scattering or charge induction;

[0077] The dust source tracking and dust suppression system for fully mechanized mining face, when the shearer is cutting coal in the fully mechanized mining face of underground coal mine, automatically detects the position of the shearer, and opens or closes the spray on the corresponding brackets of the front and rear rollers of the shearer in sequence according to the moving direction of the shearer, so that the front and rear rollers of the shearer are within the control range of the high-pressure spray. Figure 2 , is a diagram of the dust source tracking and dust reduction system of the fully mechanized mining face of this embodiment, including: N filters 1, filtering the spray water transported in the high-pressure water pipe 4; N electric valves 2, controlling the spray rack 3; N sets of spray racks 3; N sets of high-pressure water pipes 4, transporting the spray water; N spray control boxes 5, receiving the signal of the coal mining machine positioning receiver 6, and sending the current coal mining machine position information to other spray control boxes 5; controlling the switch electric valve 2 according to the set system parameters; N coal mining machine positioning receivers 6, installed on the hydraulic support column, after receiving the infrared signal, sending the information to the corresponding spray control box 5; 1 coal mining machine positioning transmitter 7, installed on the coal mining machine body, sending infrared signals to the outside; 1 remote control 8, setting the number of the spray control boxes 5; wherein 5≤N≤200. Use the remote control 8 to set the number of the spray control box 5, preferably, number them in sequence from 1 to N in order of arrangement; set the operating parameters, including: the number of sprays turned on on the upwind side of the coal mining machine, the number of spray intervals for measuring the upwind of the coal mining machine, the number of sprays turned on on the downwind side of the coal mining machine, the number of spray intervals for measuring the downwind of the coal mining machine, the distance between the spray control boxes 5, the spray time, etc.

[0078] The dust source tracking and dust reduction system for the comprehensive mining face of this embodiment includes: 80 filters 1, 80 electric valves 2, 80 sets of spray racks 3, 80 sets of high-pressure water pipes 4, 80 spray control boxes 5, 1 coal mining machine positioning receiver 6, 80 coal mining machine positioning transmitters 7, and 1 remote control 8. The operating parameters of this embodiment are as follows: the number of sprays opened on the upwind side of the coal mining machine is set to 3, the number of spray intervals for measuring the wind on the coal mining machine is set to 2, the number of sprays opened on the downwind side of the coal mining machine is set to 3, the number of spray intervals for measuring the wind on the coal mining machine is set to 1, the distance between the spray control boxes 5 is set to 1.75m, and the spray time is set to 15s. The system configuration and parameter settings depend on the environmental conditions of the application scenario in which the system is located. The working face width of the coal mine shaft area where the online monitoring system for underground coal mine dust prevention equipment of this embodiment is located is 255.2m, the advancement length is 1139.2m, and the mining area is 290,700m 2. The average thickness of the coal seam is 2.1m, the designed mining height is 2m, the inclination is 1~3°, the coal seam has clear bedding, few layers and few interlayers. The moisture content of the coal body is 6.84%, the coefficient of variation of coal thickness is 25%, the mineability index is 0.95, the average burial depth is 88m, and it is a stable coal seam. The working face adopts a comprehensive mechanized coal mining method of longwall retreat in one time, and the roof of the goaf is treated by the full caving method. The working face adopts a two-way coal cutting process: the front drum of the coal mining machine cuts the top coal, and the rear drum cuts the bottom coal, and cuts two times in one round trip. The cycle footage is 0.865m, and the daily footage is 12 cuts. The middle support of the working face adopts the method of following the machine to move the frame to provide timely support for the roof. The distance behind the rear drum of the coal mining machine is 3~5 frames, and the frame moving step is 0.865m. "U" type ventilation is adopted, with air intake in the main transport chute and air return in the return chute, and the air volume is 715m 3 / min, the average wind speed on the working face is 1.54m / s.

[0079] The working process of the dust source tracking and dust reduction system for fully mechanized mining face is as follows:

[0080] 1. The coal mining machine positioning transmitter 7 installed on the coal mining machine body always sends infrared signals outward;

[0081] 2. The coal mining machine positioning receiver 6 installed on the hydraulic support column receives the infrared signal and sends the information to the corresponding spray control box 5;

[0082] 3. After receiving the information, the spray control box 5 sends its own number, i.e. the current coal mining machine location information, to other spray control boxes 5;

[0083] 4. After receiving the current coal mining machine position information, all spray control boxes 5 determine whether they need to open the electric valve 2 according to the set system parameters;

[0084] 5. If the electric valve 2 needs to be opened, the action of opening the electric valve 2 is executed, and the countdown is started according to the set spray time. After the countdown ends, the action of closing the electric valve 2 is executed; if the electric valve 2 does not need to be opened, no operation is performed.

[0085] The communication between the coal mining machine positioning receiver 6 and the spray control box 5 is carried out in a wired or wireless manner.

[0086] The intelligent dust removal system for the comprehensive excavation face of this embodiment automatically monitors the environmental parameters of the working face, including dust concentration, gas concentration, and air volume, when the tunneling machine of the comprehensive excavation working face in an underground coal mine is working; and then intelligently controls the forward movement of the dust removal system and the start and stop of the dust collector according to the environmental parameters of the working face.

[0087] See also Figure 3, is a diagram of an intelligent dust removal system for a comprehensive excavation face according to an embodiment of the present invention, comprising: 1 area controller, 1 distance measuring sensor, 2 dust concentration sensors, 1 methane sensor, 2 air volume sensors, 1 monorail hanging system, 1 valve electric device, 1 frequency converter, and 1 dust collector; wherein, the 2 dust concentration sensors are: a first dust concentration sensor and a second dust concentration sensor; the 2 air volume sensors are: a first air volume sensor and a second air volume sensor;

[0088] First, set the system operating parameters on the regional controller, including: distance limit L from the head-on S , Dust concentration exceeds the limit value C S 、Methane exceeds limit value A S wait.

[0089] The working process of the intelligent dust removal system for comprehensive excavation face is as follows:

[0090] 1. The regional controller collects data from the distance measuring sensor in real time. The real-time value of the distance between the comprehensive excavation face and the head is L. When L ≥ L S When L<(L S ×50%), the monorail crane system is controlled to stop moving;

[0091] 2. The regional controller collects data from the methane sensor in real time. The real-time value of methane is A. When A≥A S When the inverter output is controlled, the dust collector is turned off;

[0092] 3. The regional controller collects the data of the second dust concentration sensor in real time. The real-time value of the second dust concentration sensor is C2. When C2 ≥ C S When the inverter output is controlled, the dust collector is turned on;

[0093] 4. The regional controller collects data from the first dust concentration sensor and the second dust concentration sensor in real time. The real-time value of the first dust concentration sensor is C1, the real-time value of the second dust concentration sensor is C2, and the dust reduction efficiency η = (C1-C2) / C1×100%; when the dust reduction efficiency η is less than 90%, the inverter output is controlled to increase the frequency and increase the power of the dust collector; when the dust reduction efficiency η is greater than 95%, the inverter output is controlled to restore to the initial frequency value;

[0094] 5. The zone controller collects data from the first air volume sensor and the second air volume sensor in real time. The real-time value of the first air volume sensor is Q1, the real-time value of the second air volume sensor is Q2, and the axial-radial air volume ratio K=Q2 / (Q1-Q2)×100%.

[0095] When K>0.8, the valve electric device is controlled to make its internal baffle rotate clockwise; when K≤0.7, the valve electric device is controlled to make its internal baffle rotate counterclockwise.

[0096] The automatic water spraying dust suppression system in the return air lane and belt transport lane of the underground coal mine automatically monitors the belt operation and dust concentration, automatically controls the opening and closing of the electric valve, and realizes the automatic control of spray dust suppression. Figure 4 , which is a diagram of an automatic watering and dust suppression system for a laneway according to an embodiment of the present invention, including: a filter 1, an electric valve 2, a spray rack 3, a high-pressure water pipe 4, a spray control box 5, a remote controller 8, a dust concentration sensor 9, a belt touch sensor 10 and a light control sensor 11.

[0097] First, set the system operating parameters on the spray control box 5. The operating parameters include the working mode, the dust concentration limit value C S , countdown time T, etc.

[0098] The working process of the automatic sprinkler dust suppression system in the tunnel is as follows:

[0099] 1. The spray control box 5 obtains the data of the dust concentration sensor 9 and the belt touch sensor 10 in real time. The real-time monitoring dust concentration value of the dust concentration sensor 9 is C. If C ≥ C S Or when the belt touch sensor 10 has a signal, the spray control box 5 controls the electric valve 2 to open, and spraying starts at this time; if C<C S Or when there is no signal from the belt touch sensor 10, the spray control box 5 controls the electric valve 2 to close, and the spraying is stopped at this time.

[0100] 2. The spray control box 5 collects data from the light control sensor 11 in real time. When the electric valve 2 is open, if a light control signal appears, the spray control box 5 controls the electric valve 2 to close, and the spraying stops at this time. Then the countdown function is turned on, and the countdown time is T. After the countdown ends, the spray control box 5 controls the electric valve 2 to open, and the spraying starts at this time.

[0101] Data exchange between the spray control box 5 and the electric valve 2, the dust concentration sensor 9, the light control sensor 11, and the belt touch sensor 10 can be carried out in a wired or wireless manner.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An online monitoring system for dust prevention equipment in underground coal mines, characterized in that: include: The online monitoring platform for dust prevention equipment communicates data with the switch through the underground coal mine industrial ring network; The switch converts the data signal sent by the dust-proof equipment monitoring substation into a network signal and forwards it to the corresponding dust-proof equipment monitoring substation; The dust prevention equipment monitoring substation realizes real-time monitoring and control of the data and operating parameters of each dust prevention equipment; it communicates data with the dust concentration sensor, the dust source tracking and dust reduction system of the fully mechanized mining face, the intelligent dust removal system of the fully mechanized excavation face, and the automatic water sprinkling and dust reduction device in the tunnel; Dust concentration sensor, real-time monitoring of dust concentration in underground coal mine dust workplaces; The dust source tracking and dust reduction system of the fully mechanized mining face can automatically detect the position of the shearer when the shearer is cutting coal, and turn on or off the spray on the corresponding brackets of the front and rear rollers of the shearer in sequence according to the moving direction of the shearer, so that the front and rear rollers of the shearer are within the control range of the high-pressure spray; The intelligent dust removal system for the fully-mechanized excavation face automatically monitors the environmental parameters of the working face when the tunneling machine is working in the fully-mechanized excavation working face of the underground coal mine; then the dust removal system is intelligently controlled to move forward and start and stop the dust collector according to the environmental parameters of the working face; The automatic water sprinkling and dust reduction system in the tunnel automatically monitors the belt operation conditions in the belt transport tunnel and the dust concentration in the return air tunnel of the underground coal mine, and automatically controls the spray dust reduction.

2. The online monitoring system for underground coal mine dust prevention equipment according to claim 1 is characterized in that: The dust prevention equipment online monitoring platform includes: The data acquisition module collects the data and operating parameters of each dust prevention device stored in the dust prevention device monitoring substation regularly through the underground coal mine industrial ring network and switches; The data analysis module analyzes the dust concentration and the data and operating parameters of each dust prevention device to determine whether the dust reduction efficiency and operating parameters match. If not, it automatically calculates the operating parameters that need to be adjusted. Data statistics module, which summarizes and counts the operation status of each dust prevention equipment; The automatic control module sends the operating parameters that need to be adjusted to the monitoring substation corresponding to the dust prevention equipment.

3. The online monitoring system for underground coal mine dust prevention equipment according to claim 2 is characterized in that: The dust prevention equipment monitoring substation has the following functions: Data collection function: sending collection instructions to each dust-proof device, receiving reply instructions from the dust-proof device, parsing the reply instructions, determining the data and operating parameters of each dust-proof device, and storing and displaying them; Data upload function: after receiving the collection instruction issued by the platform, the stored data and operating parameters of each dust prevention device are packaged and sent to the platform; The operating parameter modification forwarding function sends the operating parameter modification instruction to the corresponding dust prevention device after receiving the operating parameter modification instruction issued by the platform.

4. The online monitoring system for underground coal mine dust prevention equipment according to claim 3 is characterized in that: The fully mechanized mining face dust source tracking and dust reduction system comprises: a filter (1) for filtering spray water transported in a high-pressure water pipe (4); an electric valve (2) for controlling a spray rack; a spray rack (3); a high-pressure water pipe (4) for transporting spray water; a spray control box (5) for receiving a signal from a coal mining machine positioning receiver (6), sending current coal mining machine position information to other spray control boxes (5) and controlling the switch of the electric valve (2) according to set system parameters; a coal mining machine positioning receiver (6) installed on a hydraulic support column, and after receiving an infrared signal, sending the information to a corresponding spray control box (5); a coal mining machine positioning transmitter (7) installed on a coal mining machine body and sending an infrared signal outward; and a remote controller (8) for setting the number of spray control boxes (5) and setting operating parameters, including: the number of sprays opened on the upwind side of the coal mining machine, the number of spray intervals for measuring the upwind side of the coal mining machine, the number of sprays opened on the downwind side of the coal mining machine, the number of spray intervals for measuring the downwind side of the coal mining machine, the distance between the spray control boxes (5) and the spray time.

5. The online monitoring system for underground coal mine dust prevention equipment according to claim 3 is characterized in that: The intelligent dust removal system for the comprehensive excavation face includes: a zone controller and a distance sensor, a dust concentration sensor, a methane sensor, an air volume sensor, a monorail system, a valve electric device, a frequency converter and a dust collector connected thereto; the zone controller collects data from the distance sensor in real time to control the action of the monorail system, collects data from the methane sensor and the dust concentration sensor in real time to control the frequency converter and the dust collector, and collects data from the air volume sensor in real time to control the valve electric device.

6. An online monitoring system for underground coal mine dust prevention equipment according to any one of claims 3, 4 or 5, characterized in that: The automatic water sprinkling and dust reduction system for the lane comprises: a filter (1), an electric valve (2), a spray rack (3), a high-pressure water pipe (4), a spray control box (5), a remote controller (8), a dust concentration sensor (9), a belt touch sensor (10), and a light control sensor (11); the spray control box (5) acquires data from the dust concentration sensor (9), the belt touch sensor (10), and the light control sensor (11) in real time to control the opening and closing of the electric valve (2) to adjust the spray.

7. An online monitoring method for underground coal mine dust prevention equipment, characterized in that: The following steps are involved: Use the dust prevention equipment online monitoring platform to communicate data with the switch through the underground coal mine industrial ring network; Use the switch to convert the data signal sent by the dust-proof equipment monitoring substation into a network signal and forward it to the corresponding dust-proof equipment monitoring substation; The dust prevention equipment monitoring substation is used to monitor and control the data and operating parameters of each dust prevention equipment in real time; data communication is carried out with dust concentration sensors, dust source tracking and dust reduction systems for fully mechanized mining faces, intelligent dust removal systems for fully mechanized excavation faces, and automatic water sprinkling and dust reduction devices in tunnels; Use dust concentration sensors to monitor dust concentration in underground coal mines in real time; When the shearer is cutting coal in the fully-mechanized working face of an underground coal mine, the fully-mechanized face dust source tracking and dust reduction system is used to automatically detect the position of the shearer and turn on or off the spray, so that the front and rear rollers of the shearer are within the control range of the high-pressure spray; When the tunneling machine is working at the fully-mechanized excavation face of an underground coal mine, the fully-mechanized excavation face intelligent dust removal system is used to automatically monitor the environmental parameters of the working face, and the dust removal system is intelligently controlled to move forward and start and stop the dust collector according to the environmental parameters of the working face; The automatic water sprinkling and dust reduction system in the tunnel is used to automatically monitor the belt operation conditions in the belt transport tunnel and the dust concentration in the return air tunnel of the underground coal mine, and automatically control the switch of the electric valve to control the spray dust reduction.

8. The method for online monitoring of dust prevention equipment in underground coal mines according to claim 7, characterized in that: The steps of using the fully mechanized mining face dust source tracking and dust reduction system to automatically detect the position of the coal mining machine and turn on or off the spray so that the front and rear rollers of the coal mining machine are within the control range of the high-pressure spray are specifically: After receiving the infrared signal sent out by the coal mining machine positioning transmitter (7), the coal mining machine positioning receiver (6) sends the information to the corresponding spray control box (5); The spray control box (5) sends the current coal mining machine position information to other spray control boxes (5); After receiving the current coal mining machine position information, all spray control boxes (5) determine whether they need to open the electric valve (2) according to the set system parameters; After the electric valve (2) is opened, a countdown is started according to the set spray time, and after the countdown ends, the electric valve (2) is closed.

9. The method for online monitoring of dust prevention equipment in underground coal mines according to claim 8, characterized in that: The steps of automatically monitoring the working face environmental parameters by using the intelligent dust removal system of the fully mechanized excavation face, and intelligently controlling the forward movement of the dust removal system and the start and stop of the dust collector according to the working face environmental parameters are specifically as follows: Set working face environment parameters, including: distance limit L from the front S , Dust concentration exceeds the limit value C S 、Methane exceeds limit value A S ; Assume that the real-time value of the distance between the comprehensive excavation face and the head is L. When L ≥ L S When L<(L S ×50%), the monorail crane system is controlled to stop moving; Assume that the real-time value of methane is A. When A≥A S When the inverter output is controlled, the dust collector is turned off; Assume that the real-time value detected by a dust concentration sensor is C2. When C2 ≥ C S When the inverter output is controlled, the dust collector is turned on; Assume that the real-time value of another dust concentration sensor is C1, and the dust reduction efficiency η = (C1-C2) / C1×100%; when the dust reduction efficiency η is less than 90%, the inverter output is controlled to increase the frequency and increase the power of the dust collector; when the dust reduction efficiency η is greater than 95%, the inverter output is controlled to restore to the initial frequency value; Assume that the real-time value of one air volume sensor is Q1, and the real-time value of the other air volume sensor is Q2, and the axial radial air volume ratio K = Q2 / (Q1-Q2)×100%; when K>0.8, control the valve electric device to make its internal baffle rotate clockwise; when K≤0.7, control the valve electric device to make its internal baffle rotate counterclockwise.

10. The method for online monitoring of dust prevention equipment in underground coal mines according to claim 8 or 9, characterized in that: The steps of using the automatic water sprinkling dust reduction system in the laneway to automatically monitor the belt operation of the belt transport lane and the dust concentration of the return air lane in the underground coal mine, and automatically controlling the switch of the electric valve to control the spray dust reduction are specifically as follows: Set system operating parameters, including: working mode, dust concentration limit value C S and countdown time T; Assume that the real-time monitoring dust concentration value of the dust concentration sensor (9) is C. If C ≥ C S Or when the belt touch sensor (10) has a signal, the spray control box (5) controls the electric valve (2) to open to start spraying; if C<C S Or when there is no signal from the belt touch sensor (10), the spray control box (5) controls the electric valve (2) to close to stop spraying; When the electric valve (2) is open, if a light control signal from the light control sensor (11) is detected, the spray control box (5) controls the electric valve (2) to close to stop spraying, and starts a countdown with a duration of T. After the countdown ends, the spray control box (5) controls the electric valve (2) to open to start spraying.

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