Intelligent centralized control system and method for blasting exhaust in tunnel construction

Abstract

An intelligent centralized control system and method for blasting exhaust in tunnel construction is provided. [Solution] The monitoring unit and the first programmable logic controller are both located in the tunnel construction blasting work equipment, the monitoring unit is connected in communication with the first programmable logic controller, the monitoring unit is used to collect environmental data of the tunnel construction blasting and send it to the first programmable logic controller, the first programmable logic controller determines whether to issue a control command based on a predetermined logical relationship according to the collected environmental data of the tunnel construction blasting (S101), when the environmental data satisfies the predetermined logical relationship, the first programmable logic controller issues a control command, the second programmable logic controller is located in the tunnel hole and connected in communication with the first programmable logic controller and the exhaust unit, in response to issuing the control command, controls the frequency conversion operation of the exhaust unit installed inside the tunnel, and exhausts and removes dust from the inside of the tunnel (S102), thereby realizing high-precision unmanned management control of tunnel construction.

Description

[Technical field]

[0001] The present application relates to the field of tunnel construction technology, and in particular to an intelligent centralized control system and method used for blasting exhaust in tunnel construction. [Background technology]

[0002] During the construction process inside a tunnel, it is necessary to exhaust vehicle exhaust fumes, gun smoke, and dust generated during the construction process outside the tunnel and introduce fresh air into the tunnel to ensure the safety and comfort of the workers and protect the physical health of the workers inside. A rational ventilation system and ideal ventilation effect are important guarantees for realizing the rapid construction of a tunnel and ensuring the safety of the construction and the physical and mental health of the workers.

[0003] Therefore, there is a need to provide an improved technical solution to address the shortcomings of the prior art. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT The object of the present invention is to provide an intelligent centralized control system and method used for blast exhaust in tunnel construction, to solve or alleviate the problems existing in the prior art mentioned above. [Means for solving the problem]

[0005] In order to achieve the above object, the present application provides the following technical means.

[0006] The present application provides an intelligent centralized control system for tunnel construction blasting exhaust, which includes a monitoring unit, a first programmable logic controller, a second programmable logic controller, an exhaust unit, and a dust reduction and spray unit, the monitoring unit and the first programmable logic controller are all located in the tunnel construction blasting work device, the monitoring unit is connected to the first programmable logic controller, the monitoring unit can collect and transmit environmental data of the tunnel construction blasting to the first programmable logic controller, and the first programmable logic controller can estimate the environmental data of the tunnel construction blasting based on a preset logical relationship. and determining environmental data, wherein the first programmable logic controller issues a control command in response to the environmental data satisfying the predetermined logical relationship; the second programmable logic controller is located at a hole of the tunnel and is in communication with the first programmable logic controller, and controls a frequency conversion operation of the exhaust unit based on the received control command; the exhaust unit and the dust reduction and spray unit are mounted within the tunnel, both of which are in communication with the second programmable logic controller, and are used to perform frequency conversion operation under the control of the second programmable logic controller to exhaust and dedust the inside of the tunnel.

[0007] The monitoring unit located on the working device collects and transmits environmental data of the blasting of the tunnel construction to the first programmable logic controller, and the first programmable logic controller also located on the working device makes a judgment according to the collected environmental data based on a preset logical relationship, and if the environmental data satisfies the preset logical relationship, the first programmable logic controller issues a control command to the second programmable logic controller located in the tunnel hole, and the second programmable logic controller controls the frequency conversion operation of the exhaust unit installed inside the tunnel according to the control command, so as to exhaust and remove dust from the inside of the tunnel. Thus, during the blasting of the tunnel, the exhaust unit automatically starts, runs and stops, and performs intelligent exhaust and dust removal for the blasting of the tunnel, thereby realizing high-precision unmanned management control of the tunnel construction, saving manpower and material energy, improving construction efficiency, and also providing strong construction stability, flexible and convenient arrangement, and further enhancing the safety of the construction process. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of an intelligent centralized control system used for blasting exhaust in tunnel construction. [Diagram 2] FIG. 4 is a schematic diagram of a monitoring unit attached to the working device. [Diagram 3] FIG. 4 is a logical relationship diagram of the pre-start of the exhaust unit. [Figure 4] FIG. 13 is a logic diagram of the exhaust unit start-up when the dust concentration is too high. [Diagram 5] FIG. 13 is a schematic diagram of an alarm when environmental data is abnormal. [Figure 6] 1 is a flow chart of an intelligent centralized control method used for blasting exhaust in tunnel construction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The excavation work of tunnel construction includes drilling, charging, blasting, ventilation, slag removal and so on. In the traditional construction process, after drilling and charging are completed, the personnel withdraw, start the blasting, and use the intercom to notify the personnel in the hole to start the exhaust unit, wait for a while until the dust is blown out, then start the dust reduction and spray unit, and participate in the control artificially in the whole process, and cannot understand the actual situation inside the tunnel construction surface after blasting. With the development of the construction, blind pipes (construction management when not understanding the construction surface) will inevitably cause the construction progress to slow down. If the start time of the exhaust and spray system is too long or too short, it will result in energy waste, and the internal environment of the tunnel cannot be detected in real time, which creates safety risks for the construction workers.

[0010] In the process of tunnel construction, especially railway tunnel construction (railway tunnel single-hole continuous distance long construction space is narrow, data monitoring is difficult, and geological conditions are complicated), in order to achieve ideal ventilation effect through a reasonable ventilation system, accelerate the progress of tunnel construction, and ensure construction safety and personnel physical and mental health, the applicant provides an intelligent centralized control technology used for blasting exhaust in tunnel construction, and based on the traditional tunnel ventilation experience and the investigation results of the current technical performance of ventilation equipment and other power supply equipment, comprehensively considers the situations that may appear in the construction process, realizes high-precision unmanned management control of tunnel construction, saves manpower and material energy, and improves construction efficiency and construction safety.

[0011] As shown in Figures 1 to 5, the intelligent centralized control system used for blasting exhaust in this tunnel construction includes a monitoring unit, a first programmable logic controller, a second programmable logic controller, an exhaust unit, and a dust reduction and spray unit. The monitoring unit and the first programmable logic controller are both located in the tunnel construction blasting work device, the monitoring unit is communicatively connected with the first programmable logic controller, the monitoring unit can collect and transmit environmental data of the tunnel construction blasting to the first programmable logic controller, the first programmable logic controller judges the environmental data based on a preset logical relationship, and in response to the environmental data satisfying the preset logical relationship, the first programmable logic controller issues a control command, the second programmable logic controller is located in the tunnel hole and communicatively connected with the first programmable logic controller, and controls the frequency conversion operation of the exhaust unit based on the received control command, the exhaust unit and the dust reduction and spray unit are installed inside the tunnel, and both are communicatively connected with the second programmable logic controller, and perform frequency conversion operation based on the control of the second programmable logic controller, and are used for exhaust and dust removal for the inside of the tunnel.

[0012] The monitoring unit is installed on the blasting work equipment (e.g., work trolley) of tunnel construction, to realize real-time monitoring of the on-site environment of the blasting face, to timely and effectively reflect the on-site situation of the blasting work, to realize on-site management of the blasting work by the remote control side, to realize highly accurate management and control of the construction site, to reduce safety risks, and to improve the construction safety of the contractors.

[0013] The collecting unit monitors the environmental data in real time during the construction process in the tunnel, such as the working status of the constructor, the power supply status of the equipment, the dust concentration generated by the blasting work, the temperature and humidity of the construction environment in the tunnel, noise, and the concentration of harmful gases, and logically judges the environmental data according to the logical relationship set in the first programmable logic controller installed in the work device, thereby intelligently judging the actual situation of the construction site.Then, the control command created according to the actual situation is transmitted to the second programmable logic controller located in the tunnel hole through the network system in the tunnel, and the second programmable logic controller controls the exhaust unit set up in the tunnel according to the control command, and performs frequency conversion operation according to the actual situation of the tunnel cross-section construction, thereby realizing intelligent and high-precision unmanned management of exhaust and dust removal in the tunnel, saving manpower / material force, improving construction efficiency, and making the construction stable, flexible and convenient to arrange, and further enhancing the safety of the construction process.

[0014] The monitoring unit includes dust sensors positioned at the four corners of the working device and used to collect real-time dust concentration during blasting for tunnel construction; human body detection sensors distributed evenly around the working device and used to guide subjects around the working device; a temperature and humidity sensor positioned at one end of the working device far from the construction surface of the tunnel and used to collect real-time temperature and real-time humidity during blasting for the tunnel construction; a noise sensor attached together with the temperature and humidity sensor to the rear end of the working device and used to collect real-time noise during blasting for the tunnel construction; a harmful gas sensor attached together with the dust sensor to the four corners of the working device and used to collect real-time harmful gas concentration during blasting for tunnel construction; and a voltage and current sensor connected to the main distribution box of the working device and used to collect the power circuit current during construction of the working device.

[0015] The dust sensor, human body detection sensor, temperature and humidity sensor, noise sensor, harmful gas sensor, and voltage and current sensor transmit collected data in the form of a 485 bus to the first programmable logic controller. However, the voltage and current sensor is connected to the main distribution box of the work equipment, and collects the power circuit current when the work equipment is in operation, so that the first programmable logic controller can refer to and determine whether the blasting work is complete.

[0016] The dust sensor has PM2.5 and PM10, and the range is 0 to 1000μg / m 3 and has a resolution of 1μg / m 3 The consistency can reach ±10%, and an air quality transducer with dual-frequency data collection and automatic orientation can be used. At the same time, the dust sensor further has laser light attenuation prevention, which ensures the long-term stable operation of the dust sensor in the poor environment inside the tunnel.

[0017] Harmful gas sensors are Methane Transmitter and, Carbon Dioxide Transmitter and, Carbon monoxide transmitter Including, Methane Transmitter is an explosion-proof type with a range of 0 to 100% (LEL), accuracy of ±5%FS, and repeatability of ±7% or less. Methane Transmitter where LEL is the unit of measurement for methane, 10% LEL = 5000 ppm = 0.5% VOL, and repeatability refers to the data error of tests at different times under the same environment.

[0018] Carbon Dioxide Transmitter The infrared ray calibration is used to measure the carbon dioxide concentration during blasting in tunnel construction, which realizes rapid and sensitive measurement of the carbon dioxide concentration inside the tunnel and avoids the problems of drift during long-term use and the lifespan of conventional electrochemical sensors. Carbon Dioxide Transmitter The measurement range is 0 to 10,000 ppm, the self-temperature step is long, and the influence of temperature is small.

[0019] The human body detection sensor adopts a human body heat emission infrared induction module, and has multiple human body heat emission infrared induction modules, which are arranged in parallel at intervals of 5 meters along the circumference of the working device. Therefore, the human body detection sensor has high detection sensitivity, wide detection range, reliable operation, long life, and is not affected by temperature, humidity, noise, airflow, dust, optical fiber, etc., and can operate in the poor environment inside the tunnel. In addition, the human body detection sensor adopts switching quantity transmission.

[0020] The temperature and humidity sensor uses a wide voltage range power supply of 10 to 30 volts and a particle-sintered probe sheath to ensure the accuracy and reliability of temperature and humidity collection.

[0021] Other types of sensors can also be placed on the work equipment to enable monitoring of different, complex and changing tunnel construction environments, improving the safety of tunnel blasting work, reducing risks for builders, and improving their physical and mental health.

[0022] The intelligent centralized control system used for blasting exhaust in tunnel construction further includes an alarm unit connected to the first programmable logic controller, and correspondingly, the first programmable logic controller determines based on the preset logical relationship that the received environmental data exceeds a set value and sends an alarm command to the alarm unit, or the first programmable logic controller determines based on the preset logical relationship that the received environmental data does not change within a predetermined time and sends an alarm command to the alarm unit.

[0023] When any of the environmental temperature, humidity, and harmful gas concentration in the tunnel is greater than the preset temperature value, the preset humidity value, and the preset gas concentration value, it immediately triggers an alarm and issues an alarm command to the alarm unit. In another case, when the first programmable logic controller determines that the environmental data collected by the monitoring unit does not change within a predetermined time, it considers that the exhaust unit is faulty and issues an alarm command to the alarm unit. Here, after the first programmable logic controller issues an alarm command, the relevant alarm information can also be transmitted to a remote client via the network, so that a quick and effective response can be made.

[0024] An intelligent centralized control system used for blasting exhaust in tunnel construction includes an inspection switch, wherein the inspection switch is normally open, the inspection switch, the first programmable logic controller, the second programmable logic controller and the exhaust unit form an open loop, and when the inspection switch is closed, the second programmable logic controller cuts off control over the exhaust unit.

[0025] There are multiple dust sensors, and the first programmable logic controller receives data collected by the multiple dust sensors, and then performs an averaging calculation on the data collected by the multiple dust sensors to obtain an average dust concentration in the tunnel, and the dust concentration collected by the dust concentration sensor in this text refers to the average of the data collected by the multiple dust sensors.

[0026] There are also multiple harmful gas sensors, and the first programmable logic controller receives data collected by the multiple harmful gas sensors, and then finds the maximum harmful gas concentration from the data collected by the multiple harmful gas sensors. In this document, the harmful gas concentration collected by the harmful gas sensor refers to the maximum harmful gas concentration collected by the multiple harmful gas sensors.

[0027] Through the collection of real-time environmental data during tunnel blasting work, the exhaust unit can be automatically controlled to start, operate and stop, and intelligently exhaust and remove dust during the blasting work inside the tunnel. This realizes high-precision unmanned management of tunnel construction, saves manpower and material resources, improves construction efficiency, and ensures strong construction stability, flexible and convenient deployment, thereby further enhancing the safety of the construction process.

[0028] As shown in FIG. 6, the intelligent centralized control method used for blasting exhaust in tunnel construction provided in the present application includes steps S101 and S102.

[0029] In step S101, it is determined whether to issue a control command based on a preset logical relationship according to the collected environmental data of the blasting for the tunnel construction.

[0030] In the blasting process of tunnel construction, restarting the exhaust unit after blasting will result in an extension of the exhaust time, especially as the tunnel construction becomes longer and longer, restarting the exhaust unit after detecting that the dust exceeds the standard will result in a long delay, which will seriously affect the construction period of the tunnel construction. In this application, the collected tunnel construction blasting environment data is judged according to a preset logical relationship to determine whether to issue a control command, i.e., a command to pre-start the exhaust unit. The judgment and control time for starting the exhaust unit is shortened, and the pre-setting of the exhaust unit pre-start improves the current construction environment in the tunnel during the tunnel construction process, and increases the control accuracy of the blasting work in the tunnel.

[0031] Specifically, in response to the fact that the number of subjects in the environmental data is zero, the noise data in the environmental data is less than the preset noise threshold, and the power circuit current in the environmental data is less than the preset current threshold within the preset start time, it is determined to issue a pre-start command for the exhaust unit. That is, based on the current group's construction experience of the tunnel blasting work and the time between each blasting, input the preset start time into the first programmable logic controller, and if the collected noise data is less than the preset noise threshold, the human body detection sensor does not detect the construction worker within the preset start time, all the construction workers withdraw from the blasting work site, and if the power circuit current of the working device is less than the preset current threshold, it is determined that the blasting work is completed, and a pre-start command for the exhaust unit is issued, and the exhaust unit is determined to pre-start.

[0032] The preset noise threshold is 10 decibels, and the preset current threshold is 2 A. The current monitored by the voltage and current sensor includes not only the power circuit current but also other electrical equipment (e.g., lighting equipment) and the like.

[0033] In step S102, in response to the issuance of the control command, the frequency conversion operation of the exhaust unit installed inside the tunnel is controlled to exhaust and remove dust from the inside of the tunnel.

[0034] The control command includes a real-time operating frequency of the exhaust unit, and determines the real-time operating frequency of the exhaust unit according to formula (1). Formula (1) is as follows:

number

number

[0035] The lower limit of dust concentration and the upper limit of dust concentration during blasting work inside the tunnel can be set in the second programmable logic controller, and at the same time, the set lower limit of dust concentration and the set upper limit of dust concentration can be adjusted according to changes in the environment of the blasting work inside the tunnel and changes in the geological conditions.

[0036] The upper limit of dust concentration for the exhaust unit is 800μg / m 3 (PM10), with a lower limit of dust concentration of 400 μg / m 3 (PM10), the maximum operating frequency of the exhaust unit is 50HZ, and the minimum operating frequency of the exhaust unit is 20HZ.

[0037] In response to the issuance of the control command, the first programmable logic controller controls the frequency conversion operation of the exhaust unit installed inside the tunnel through the control command in the second programmable logic controller to exhaust and remove dust from the inside of the tunnel, specifically, sends the control command and controls the frequency conversion operation of the exhaust unit installed inside the tunnel in response to the dust concentration increasing within a second preset time, exhausts and removes dust from the inside of the tunnel, sends the control command and controls the stop of the exhaust unit installed inside the tunnel in response to the dust concentration not changing within the second preset time.

[0038] After determining the pre-start of the exhaust unit, the first programmable logic controller issues a control command, and the second programmable logic controller starts timing. If the tunnel blasting work is successful after a certain period of time (second preset time) after the second programmable logic controller starts timing, the first programmable logic controller determines that the dust concentration inside the tunnel has increased based on the collected dust concentration and the preset lower limit of the dust concentration, and issues a command to the second programmable logic controller. At this time, the second programmable logic controller starts the frequency conversion operation of the exhaust unit according to the preset start-up time, performs exhaust dust removal inside the tunnel, improves the efficiency of exhaust dust removal in the tunnel, timely and effectively performs exhaust dust removal inside the tunnel, and avoids hysteresis in exhaust dust removal.

[0039] In the blasting process of tunnel construction, when there is an abnormality in blasting, such as no blasting work being performed inside the tunnel due to the expiration of explosives, the first programmable logic controller determines that the dust concentration will not change within a second preset time based on the collected dust concentration and the preset lower limit of the dust concentration, and issues a command to the second programmable logic controller, at this time, the second programmable logic controller controls the operation of the exhaust unit to stop according to the command, thereby effectively saving energy consumption and avoiding energy waste.

[0040] The method further includes controlling frequency conversion operation of an exhaust unit installed inside the tunnel in response to the issuance of a control command, and controlling stopping of operation of the exhaust unit inside the tunnel in response to a third preset time during which the dust concentration is less than a preset lower limit of the dust concentration after exhaust dust removal to the inside of the tunnel.

[0041] That is to say, after the blasting is successful, the exhaust unit starts up according to the preset start-up time, and after a certain period of frequency conversion operation (the third preset time), the first programmable logic controller determines based on the collected dust concentration that the dust concentration inside the tunnel has fallen to the preset lower limit of the dust concentration, and issues a command to the second programmable logic controller, and the second programmable logic controller controls the exhaust unit to stop operating, effectively saving energy consumption and avoiding energy waste.

[0042] The intelligent centralized control method used for blasting exhaust in tunnel construction, after the dust concentration exceeds a preset upper limit of the dust concentration and the exhaust unit reaches a maximum operating frequency, in response to delaying a fourth preset time, the dust concentration still cannot be reduced to the preset upper limit of the dust concentration, and the dust reduction and spray unit is automatically started at a fifth preset time. However, the dust reduction and spray unit is further disposed within the tunnel, and the fifth preset time is determined according to formula (2). Formula (2) is as follows:

number

[0043] The fourth preset time is the delayed start time of the dust reduction and spray unit, and after the exhaust unit operates at the maximum operating frequency for a certain time (the fourth preset time), the dust concentration in the tunnel cannot be reduced to the upper limit of the preset dust concentration, at this time, the second programmable logic controller automatically starts the dust reduction and spray unit for a certain time (the fifth preset time) to assist the exhaust unit in removing dust from the inside of the tunnel, so as to quickly reduce the dust concentration in the tunnel. For example, after the successful construction blasting in the tunnel, the dust concentration collected by the monitoring unit is greater than the upper limit of the preset dust concentration, and the exhaust unit operates at the maximum operating frequency for 300 seconds (the fourth preset time), and then automatically starts the dust reduction and spray unit for 300 seconds (the fifth preset time), and increases the operation time of the dust reduction and spray unit according to the length of the current construction blasting. Here, the operation time of the dust reduction and spray unit is precisely controlled in units of seconds, effectively improving the control accuracy of exhaust dust removal.

[0044] After the frequency conversion operation of the exhaust unit for a certain period of time (the third preset period), the dust concentration inside the tunnel remains unchanged, i.e., the dust concentration change range is within ±100μg / m 3 If it is within the range, it is considered that the exhaust unit has a fault, and issues an alarm command to the alarm unit in a timely manner, and pushes the alarm information to the remote client. It can be understood that the exhaust unit has multiple kinds of control modes, including local mode, remote control mode, automatic mode, the first programmable logic controller in the construction tunnel, the second programmable logic controller in the tunnel hole, and the remote client, etc., all of which can control the operation of the powder exhaust unit and view the operation parameters of the exhaust unit, etc.

Claims

1. An intelligent centralized control system used for blasting exhaust in tunnel construction, comprising: a monitoring unit, a first programmable logic controller, a second programmable logic controller, an exhaust unit, and a dust reduction and spray unit, The monitoring unit and the first programmable logic controller are both located in a blasting work device for the tunnel construction; The monitoring unit is communicatively connected with the first programmable logic controller, and the monitoring unit can collect and transmit environmental data of the blasting of the tunnel construction to the first programmable logic controller; the first programmable logic controller determines the environmental data based on a predetermined logical relationship, wherein in response to the environmental data satisfying the predetermined logical relationship, the first programmable logic controller issues a control command; The second programmable logic controller is located in the tunnel hole and is in communication with the first programmable logic controller, and controls the frequency conversion operation of the exhaust unit according to the received control command; The exhaust unit and the dust reduction and spray unit are installed in the tunnel, and are connected to the second programmable logic controller, and are operated in a frequency conversion manner under the control of the second programmable logic controller, and are used for exhausting and removing dust from the inside of the tunnel. The monitoring unit includes: Dust sensors are located at the four corners of the working device and are used to collect real-time dust concentration of the blasting of the tunnel construction; Human body detection sensors are evenly distributed along a circumferential direction of the working device and detect a subject around the working device; A temperature and humidity sensor is located at one end of the working device far from the construction surface of the tunnel, and collects real-time temperature and real-time humidity during blasting in the tunnel construction; a noise sensor that is attached to the rear end of the working device in parallel with the temperature and humidity sensor and is used to collect real-time noise during blasting in the tunnel construction; A harmful gas sensor is attached to each of the four corners of the working device together with the dust sensor and is used to collect harmful gas concentrations in real time during blasting in the tunnel construction work. A voltage and current sensor connected to a general distribution box of the working device and used to collect a power circuit current during installation of the working device. An intelligent centralized control system used for blasting exhaust in tunnel construction.

2. the harmful gas sensor includes a methane transmitter and a carbon dioxide transmitter; said methane transmitter having a range of 0-100% LEL, an accuracy of ±5% FS, and a repeatability of ±7% or less; The carbon dioxide transmitter measures the carbon dioxide concentration during blasting of the tunnel construction using infrared calibration. The intelligent centralized control system for blasting exhaust in tunnel construction as claimed in claim 1.

3. The human body detection sensor adopts a human body heat dissipation infrared induction module, and there are a plurality of the human body heat dissipation infrared induction modules, and the plurality of the human body heat dissipation infrared induction modules are arranged in parallel at intervals of 5 meters along the circumferential direction of the working device; The intelligent centralized control system for blasting exhaust in tunnel construction as claimed in claim 1.

4. further comprising an alarm unit connected to the first programmable logic controller; Correspondingly, The first programmable logic controller determines that the received environmental data exceeds a set value based on a preset logical relationship, and sends an alarm command to the alarm unit; or, The first programmable logic controller determines that the received environmental data does not change within a predetermined time based on a preset logical relationship, and sends an alarm command to the alarm unit. An intelligent centralized control system for use in blasting exhaust for tunnel construction according to any one of claims 1 to 3.

5. An intelligent centralized control method for blasting exhaust in tunnel construction, said method being applied to a system according to any one of claims 1 to 3, Determining whether to issue a control command based on a preset logical relationship according to the collected environmental data of the blasting of the tunnel construction; In response to the issuance of the control command, control a frequency conversion operation of an exhaust unit installed inside the tunnel to exhaust and remove dust from the inside of the tunnel; Including, Wherein, the control command includes a real-time operating frequency of the exhaust unit, and determines the real-time operating frequency of the exhaust unit according to the following formula: [0010] (wherein E represents the real-time operating frequency of the exhaust unit, H represents the dust concentration in the environmental data, and H min indicates the preset lower limit of dust concentration, and H max indicates the upper limit of the dust concentration that is preset, and E max indicates the maximum operating frequency of the exhaust unit, [0025] indicates the minimum operating frequency of the exhaust unit.) 1. An intelligent centralized control method for use in blasting exhaust in tunnel construction.

6. Determining whether to issue a control command based on a predetermined logical relationship according to the collected environmental data of the blasting of the tunnel construction; determining to issue a pre-start command for the exhaust unit in response to the number of subjects in the environmental data being zero, the noise data in the environmental data being less than a predetermined noise threshold, and the power circuit current in the environmental data being less than a predetermined current threshold within a predetermined startup time; The intelligent centralized control method for blasting exhaust in tunnel construction according to claim 5.

7. In response to the issuance of the control command, the frequency conversion operation of the exhaust unit installed inside the tunnel is controlled to exhaust and remove dust from the inside of the tunnel. sending the control command and controlling a frequency conversion operation of an exhaust unit installed inside the tunnel in response to an increase in the dust concentration within a second preset time period, to exhaust and remove dust from the inside of the tunnel; and in response to sending the control command and not changing the dust concentration within a second preset time, controlling a shutdown of an exhaust unit installed within the tunnel. The intelligent centralized control method for blasting exhaust in tunnel construction according to claim 5.

8. In response to the issuance of the control command, the frequency conversion operation of the exhaust unit installed inside the tunnel is controlled to exhaust and remove dust from the inside of the tunnel, and controlling a shutdown of an exhaust unit within the tunnel in response to a third preset time during which the dust concentration is less than the preset lower dust concentration limit. The intelligent centralized control method for blasting exhaust in tunnel construction according to claim 5.

9. In response to delaying a fourth preset time after the dust concentration exceeds the preset upper limit of the dust concentration and the exhaust unit reaches the maximum operating frequency, the dust concentration still cannot be reduced to the preset upper limit of the dust concentration, and a dust reduction and spray unit is automatically started at a fifth preset time, wherein the dust reduction and spray unit is disposed within a tunnel; The fifth preset time period is in accordance with the following formula: [0030] (In the formula, t 5 indicates the fifth preset time, the unit of which is seconds, and L i indicates the tunnel length of the i-th blasting work of the tunnel, in meters.) The intelligent centralized control method for blasting exhaust in tunnel construction according to claim 5.

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