Intelligent dustproof control system and method for coal mine underground working face mining

Abstract

The invention provides an intelligent dustproof control system and method for coal mine underground working face mining, and the system comprises three subsystems: an information collection system, an information processing system, and an information control system, the information collection system is composed of a mining dust concentration sensor, a temperature and humidity sensor, and a harmful gas sensor; the information collection system collects dust concentration, temperature and humidity and harmful gas concentration conditions of a working face in real time and uploads the collected information to the information processing system, and the information processing system optimizes the information collected by the information collection system, warns and alarms abnormal information and then sends the abnormal information to the information control system. The information control system can control the water mist amount of the working face in real time according to information provided by the information processing system, the purpose of accurately and intelligently removing dust and reducing dust is achieved, and the information control system can be controlled manually besides the information provided by the information processing system.

Description

Technical Field

[0001] This application relates to the technical field of coal mining, and particularly to an intelligent dust prevention control system and method for coal mine underground working face mining. Background Art

[0002] The existence of coal mine dust seriously affects the normal working environment. Dust is very harmful to the human body (mine dust with a diameter of less than 5 microns is the most harmful to the human body). Especially when the mine dust floating in the mine air containing free silica exceeds a certain value, it will pose a great threat to the physical health of miners. The state has strict regulations on the dust concentration during coal mine underground mining. Whether a coal mine has an intelligent dust prevention control system is a direct manifestation of its degree of intelligence.

[0003] Coal dust and some mine dust can explode when mixed with air to a certain concentration and under the action of a high-temperature heat source, which is called explosive mine dust. When mine dust explodes, it generates high temperature and high pressure, and at the same time generates a large amount of toxic and harmful gases, which pose a great threat to safe production. Preventing the explosion of coal dust is one of the main safety works in coal mines with the risk of coal dust explosion.

[0004] Therefore, there is an urgent need to provide a technical solution to address the deficiencies of the above-mentioned existing technologies. Summary of the Invention

[0005] The purpose of this application is to provide an intelligent dust prevention control system and method for coal mine underground working face mining to solve or alleviate the problems existing in the above-mentioned existing technologies.

[0006] To achieve the above purpose, this application provides the following technical solutions:

[0007] This application provides an intelligent dust prevention control method for coal mine underground working face mining. The method includes: arranging a circular spray dust suppression device under the top beam of the hydraulic support to divide the coal mining working face into multiple dust removal intervals. The coal shearer cuts coal within the intervals to effectively inhibit the spread of coal dust to the entire working face; an infrared high-pressure spray dust removal device is installed on the hydraulic support to track the working state of the coal shearer within the dust removal intervals and use high-pressure spray to effectively reduce the dust generated by cutting; sensors installed on the support are used to monitor the dust concentration, temperature and humidity, and harmful gas concentration in the dust removal intervals in real time. After the intelligent dust prevention control system effectively processes the collected information, the best dust removal plan is selected to intelligently control the dust removal equipment.

[0008] The embodiment of the present application also provides an intelligent dust prevention control system for coal mine underground working face mining, including: an information collection system, an information processing system, and an information control system, three subsystems. At the same time, the entire system is connected to an intelligent integrated management and control platform, which can be coordinated and controlled by the management and control platform as a whole. The information collection system consists of a mine dust concentration sensor, a temperature and humidity sensor, and a harmful gas sensor. The information collection system collects the dust concentration, temperature and humidity, and harmful gas concentration of the working face in real time, and uploads the collected information to the information processing system. The information transmission between the two systems can be realized through wired optical fiber or wireless means. The information processing system consists of a CPU processor. The information processing system optimizes the information collected by the information collection system, warns and alarms abnormal information, and then sends it to the information control system. The information control system mainly consists of a controller, an explosion-proof switch, and a high-pressure spray dust reduction device. The information control system can control the size of the water mist volume of the working face in real time according to the information provided by the information processing system, achieving the purpose of precise and intelligent dust removal and reduction. In addition to being controlled by the information provided by the information processing system, the information control system can also be manually controlled.

[0009] Technical effects:

[0010] The present invention has a high level of automation and can monitor the situation of the working face in real time. Greatly reducing the labor intensity of the workers in the working face for dust reduction operations and improving the dust reduction effect, avoiding situations such as water accumulation on the working face. Real-time monitoring of the dust concentration, harmful gas concentration, and temperature and humidity of the working face, and taking a series of control measures to ensure the physical health of the workers in the working face. Brief description of the drawings

[0011] The specification drawings forming a part of the present application are used to provide a further understanding of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. Among them:

[0012] Figure 1 It is a composition structure diagram of an intelligent dust prevention control system for coal mine underground working face mining according to some embodiments of the present application;

[0013] Figure 2 It is an arrangement structure diagram of an intelligent dust prevention control system for coal mine underground working face mining according to some embodiments of the present application;

[0014] Figure 3 It is a schematic structural diagram of a high-pressure spray dust reduction device according to some embodiments of the present application;

[0015] Figure 4 It is an arrangement distribution diagram of an intelligent dust prevention control system for coal mine underground working face mining according to some embodiments of the present application.

[0016] Description of reference numerals:

[0017] 1. Dust concentration sensor, harmful gas concentration sensor, temperature and humidity sensor, sound and light alarm; 2. Cylindrical spray dust suppression equipment set; 3. Hydraulic support; 4. Infrared tracking spray dust suppression device; 5. Attitude adjustment motor; 6. Spray dust suppression device and hydraulic support connection component; 7. Spray barrel; 8. Infusion pipeline. DETAILED DESCRIPTION

[0018] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as a part of an embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0019] The automation level of traditional dust control systems is low, and it is impossible to remotely monitor and control the dust concentration of the working face, the operating status of the fan, the dust removal effect, etc. in real time. The traditional dust control system adopts a simple infrared detection method. When the coal machine reaches the vicinity of the infrared sensor, the spray dust suppression device located on the hydraulic support near the coal machine is automatically turned on. However, the traditional spray dust suppression device cannot adjust the spray volume in real time according to the dust size of the working face. At the same time, in order to effectively block the dust on the coal mining working face, it is necessary to open multiple spray dust suppression devices near the coal machine, which easily causes water accumulation and increases the maintenance cost of the equipment.

[0020] Based on this, the applicant proposed an intelligent dust control system and method for underground working face mining in coal mines, which is used to perform intelligent and precise dust removal according to the real-time dust concentration generated during the mining process of the underground working face in coal mines. When the dust concentration exceeds the national maximum allowable concentration, intelligent dust removal measures such as intelligent spray dust removal are implemented to ensure the safety of working personnel on the working face. It is an intelligent dust control system used in the mining process of underground working faces in coal mines.

[0021] The object of the present invention is to provide an intelligent dust prevention control system and method for an unmanned mining face in view of the deficiencies existing in the existing dust prevention control system for coal mine underground working faces. The method includes: arranging a circular spray dust suppression device under the top beam of the hydraulic support, dividing the coal mining working face into multiple dust removal zones, and the coal shearer performs coal cutting operations within the zones to effectively inhibit the spread of coal dust to the entire working face; installing an infrared high-pressure spray dust removal device on the hydraulic support to effectively reduce the dust generated by cutting while tracking the working state of the coal shearer within the dust removal zone; using sensors installed on the support to real-time monitor the dust concentration, temperature and humidity, and harmful gas concentration in the dust removal zone, and after effectively processing the collected information through the intelligent dust prevention control system, selecting the best dust removal plan to intelligently control the dust removal equipment; the system consists of three subsystems: an information collection system, an information processing system, and an information control system. At the same time, the entire system is connected to the intelligent integrated management and control platform, and can be overall coordinated and controlled by the management and control platform. The information collection system consists of a mine dust concentration sensor, a temperature and humidity sensor, and a harmful gas sensor. The information collection system real-time collects the dust concentration, temperature and humidity, and harmful gas concentration of the working face, and uploads the collected information to the information processing system. The information transmission between the two systems can be realized through wired optical fiber or wireless means. The information processing system consists of a CPU processor. The information processing system optimally processes the information collected by the information collection system, warns and alarms abnormal information, and then sends it to the information control system. The information processing system can select the corresponding dust removal plan according to the dust concentration in the dust removal zone: when the dust concentration reaches 50% of the national maximum allowable concentration, turn on the infrared high-pressure spray dust removal device and one cylindrical spray dust suppression device on each side. When the dust concentration reaches 70% of the national maximum allowable concentration, turn on the infrared high-pressure spray dust removal device and two cylindrical spray dust suppression devices on each side. When the dust concentration reaches 90% of the national maximum allowable concentration, turn on the infrared high-pressure spray dust removal device and all cylindrical spray dust suppression devices on both sides.

[0022] The information control system is mainly composed of a controller, an explosion-proof switch, and a high-pressure spray dust suppression device. The information control system can real-time control the water volume of the water mist on the working face according to the information provided by the information processing system, so as to achieve the purpose of precise and intelligent dust removal and dust suppression. In addition to being controlled by the information provided by the information processing system, the information control system can also be manually controlled.

[0023] The present invention has a high level of automation and can monitor the working face situation in real time; it greatly reduces the labor intensity of dust suppression operations for the personnel at the working face, improves the dust suppression effect, and avoids situations such as water accumulation on the working face. It can monitor the dust concentration, harmful gas concentration, and temperature and humidity conditions on the working face in real time, and take a series of control measures to ensure the physical health of the personnel at the working face; it is applicable to the coal mining process, effectively controls the dust concentration on the working face, precisely and intelligently removes dust from the working face environment, and ensures the operation safety of the personnel at the working face.

[0024] A set of sensors and a dust suppression alarm system are set at every other support on the working face. The working face situation is monitored in real time. When the dust concentration is too high, dust suppression is carried out through the high-pressure spray dust suppression device; when the harmful gas concentration is too high, an audible and visual alarm is given, and ventilation is strengthened at the same time; when the temperature and humidity are too high, a warning is given to the personnel at the working face.

[0025] The high-pressure spray dust suppression device is composed of a cylindrical spray dust suppression equipment group and an infrared tracking spray dust suppression device arranged in a cross pattern; there are three high-pressure spray heads in the cylindrical spray dust suppression equipment group. The spray heads are designed to be detachable, enabling rapid repair and replacement, and ensuring the normal operation of the dust removal device on the working face; the cylindrical spray dust suppression equipment group can form water curtains on both sides through three cylindrical high-pressure sprays, effectively blocking the dust source and preventing the dust source from spreading to the entire working face. At the same time, the infrared tracking spray dust suppression device can track the shearer and perform precise dust suppression on the dust source, avoiding the generation of dust.

[0026] The cylindrical spray dust suppression equipment group is arranged on the top beam of the hydraulic support, with three in a group, and the water source is supplied through the centralized liquid supply system in the crossheading. Due to the relatively complex environment of the coal mining face, dust is likely to block the nozzles of the spray dust suppression device. Therefore, the nozzles of the spray dust suppression device are selected as detachable nozzles, which greatly reduces the time spent on maintenance when a failure occurs, ensures the normal progress of the working face mining work, and improves the work efficiency while ensuring the dust removal effect.

[0027] The infrared tracking spray dust suppression device is arranged on the top beam of the hydraulic support through the connecting part. Infrared sensors are set on both the tracking spray dust suppression device and the cutting part of the shearer. The infrared tracking spray dust suppression device can perceive the position of the cutting part of the shearer in real time through the sensors. There is an internal motor in the connecting part, which can drive the dust suppression device to align with the cutting part of the shearer according to the tracked position, realizing precise dust suppression on the dust source of the shearer, improving the dust suppression effect and avoiding the occurrence of water accumulation at the same time.

[0028] The shearer works between the water curtains, and at the same time, the infrared tracking spray dust suppression device is used to precisely control the dust source, which can avoid the situation of reducing the coal mining efficiency of the working face due to water accumulation formed by dust suppression, and can achieve an excellent dust removal effect, effectively ensuring safe production.

[0029] The high-pressure spray dust suppression device can ensure that the shearer is always within the dust control range during operation. The dust control range can change with the movement of the shearer, and it can achieve real-time blocking and control of the dust source, ensuring that the dust generated during the operation of the shearer is always under control. Each dust control range consists of three high-pressure spray dust suppression devices and two infrared tracking spray dust suppression devices. As the shearer advances, the control range will move accordingly, and the two groups of infrared tracking spray dust suppression devices will accurately control and remove dust from the front and rear cutting parts of the shearer.

[0030] The sensor transmits the working face conditions to the information processing system through wired optical fiber or wireless network. The information processing system screens and processes the collected information through the CPU. The information processing system can screen and judge abnormal information and transmit the results to the information control system.

[0031] To achieve continuous monitoring and data collection of various parameters on the working face, the main hardware facilities of the information collection system, information processing system, and information control system include a management terminal computer, a data acquisition server, a Bluetooth base station, a Bluetooth acquisition module, and a sensor device group. The sensor device group and the Bluetooth acquisition module are installed on the coal mining working face, and the data acquisition server and the management terminal computer are installed on the ground. The Bluetooth acquisition module includes a central processing unit (CPU), and the central processing unit includes an A / D conversion module, a Bluetooth module, and a serial port connecting the A / D conversion module and the Bluetooth module. The A / D conversion module is connected to the sensor, and the Bluetooth module is connected to the Bluetooth base station. Among them, A / D conversion can achieve analog-to-digital conversion and convert analog signals into digital signals. The Bluetooth acquisition module also includes a resistor-capacitor external network circuit, and the resistor-capacitor external network circuit is connected to the central processing unit. The Bluetooth acquisition module also includes a power supply circuit and a storage battery, and the power supply circuit is respectively connected to the central processing unit and the storage battery. The Bluetooth base station includes at least one central module, and the central module includes at least a Bluetooth connection module, a processor module, and a server connection module. The processor module is connected to the Bluetooth acquisition module through the Bluetooth connection module, and the processor module is connected to the data acquisition server through the server connection module.

[0032] Each group of sensor devices includes several sensors. The sensors within each group of sensor devices are connected to a Bluetooth base station through a Bluetooth acquisition module. Several Bluetooth base stations are connected to a data acquisition server, and the data acquisition server is connected to a management terminal computer. The sensors in each group of sensor devices include a wind speed sensor, a temperature sensor, a humidity sensor, a harmful gas sensor, and a dust concentration sensor. Through the Bluetooth acquisition module in the mine, the acquisition data of sensors such as temperature, humidity, wind speed, harmful gas concentration, and dust concentration are transmitted to the Bluetooth base station in a Bluetooth manner, and further transmitted to the data acquisition server on the ground through the Bluetooth base station, and operations are carried out through the management terminal computer connected to the data acquisition server, thereby realizing the acquisition, monitoring, supervision, and management of data such as temperature, humidity, wind speed, harmful gas concentration, and dust concentration in the coal mine underground.

[0033] The information processing system has a function of self-detecting faults. It can judge the abnormal information provided by the information collection system, analyze the fault information that may be abnormal, and give a warning for the existing abnormal situation. The spray dust removal system works normally. If the nozzles of the cylindrical spray dust suppression equipment group are blocked and the pressure increases, the spray device on the nearer side will be started to prevent the dust from spreading to the entire working face due to the failure to be effectively blocked in time, which may affect the operation safety. At the same time, the fault information will be reported to the responsible personnel through the mobile phone APP to help them quickly locate and eliminate the fault.

[0034] The information control system can provide the information provided by the information processing system to the execution end to control the switch of the circular spray system. When the preset conditions are met, the spray switch is turned on for dust suppression operations. If the dust concentration and harmful gas concentration on the working face are too high and the temperature and humidity are not suitable for the staff to work, the sound and light system will give an alarm to remind the working face operators to take actions to protect their own safety.

[0035] In addition to being controlled by the information control system, the working face spray dust removal system can also be manually controlled according to the actual situation of the working face. In case of unexpected situations, it can also ensure the normal operation of the entire system and guarantee the personal safety of the working face staff.

[0036] The sensors on the working face will feedback the effects after taking corresponding measures to the information processing system in real time. After being processed by the information processing system, it is provided to the information control system, and then the information control system controls the relevant equipment on the working face to make adjustments, forming a closed-loop system to ensure the best control of the dust on the working face.

[0037] The intelligent dust prevention control system on the working face will be connected to the integrated intelligent comprehensive management and control platform. The staff can realize the coordinated control of the entire system on the management and control platform, greatly improving the automation level of the coal mine, reducing the burden on the staff, and improving the intelligent level of the coal mine.

[0038] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An intelligent dust control method for underground coal mine working face mining, characterized in that: include: A circular spray dust reduction device is arranged under the top beam of the hydraulic support, and the coal mining face is divided into multiple dust removal areas. The coal machine performs coal cutting operations within the areas, effectively suppressing the spread of coal dust to the entire working face; an infrared high-pressure spray dust removal device is installed on the hydraulic support to track the working status of the coal machine in the dust removal area and use high-pressure spray to effectively reduce the dust generated by cutting; the sensor installed on the support is used to monitor the dust concentration, temperature and humidity, and harmful gas concentration in the dust removal area in real time, and the intelligent dust prevention control system effectively processes the collected information and selects the best dust removal plan to intelligently control the dust removal equipment.

2. An intelligent dust control system for underground coal mine working face mining, characterized in that: include: The information collection system consists of three subsystems: information processing system and information control system. At the same time, the entire system is connected to the intelligent comprehensive management and control platform, which can be coordinated and controlled by the management and control platform as a whole. The information collection system is composed of mining dust concentration sensors, temperature and humidity sensors, and harmful gas sensors. The information collection system collects the dust concentration, temperature and humidity, and harmful gas concentration of the working surface in real time, and uploads the collected information to the information processing system. The information transmission between the two systems can be achieved through wired optical fiber or wireless methods. The information processing system is composed of a CPU processor. The information processing system optimizes the information collected by the information collection system, issues warning alarms for abnormal information, and then sends it to the information control system. The information control system is mainly composed of a controller, an explosion-proof switch, and a high-pressure spray dust reduction device. The information control system can control the amount of water mist on the working surface in real time according to the information provided by the information processing system, so as to achieve the purpose of precise and intelligent dust removal and reduction. In addition to being controlled by the information provided by the information processing system, the information control system can also be controlled manually.

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