Coal mine modernization monitoring technology and applications (1)

Since 2000, with the nation's coal mine safety in production requirements and continuous improvement and development of the enterprise itself, the country's large, medium and small mines were equipped with mine monitoring systems.

These systems equipment greatly improving mine safety level of production and production safety management efficiency, but also on the correct choice of the technology, the use, maintenance, and safety production information management put forward higher requirements. Currently, coal mine safety monitoring system with analog, switch data, cumulative volume collection, transmission, storage, processing, display, print, sound and light alarm, control and many other functions used to monitor underground methane concentration, the concentration of carbon monoxide, carbon dioxide concentration, oxygen concentration, wind speed, pressure, temperature, smoke, feed State, air door status, the wind window state, hairdryers, State, and local fan start stop, main fans start stop, voltage, current, and realized the methane concentration sound and light alarm, power off and methane locking control, etc. In recent years, Yanzhou mining (Group) co., Ltd. and its subordinates all previous to mine coal mine for monitoring and control of a number of issues have been carefully analyzed and summarized, and joint activities with the relevant units in the scientific and technological research and achieved a number of outstanding research results, at the same time they also actively apply current existing mine monitoring and apply new technologies, solutions and in mine, was implemented to effectively guarantee the safety of the mine, and achieved good results.

1 large equipment for centralized monitoring system in the coal mine

Yanzhou mining (Group) company Dongfeng xinglongzhuang coal mine well realized large-scale equipment for centralized monitoring, equipment acquisition parameters of foot, user programs designed to expand for future room unattended created a valuable experience.

The mine's large equipment airshaft centralized monitoring with main monitoring system, 6kV-level transformation-based protection system and industrial TV video system.

The main monitoring system-fan monitoring subsystem, pump monitoring subsystem and air compressor monitoring subsystem. The monitoring PC with Advantech IPC IPC610 series, rely on communication with the individual subsystems, centralized monitoring all devices running, monitoring air compressor subsystem, fan subsystem and pump subsystem operation parameters, work status and failure alarm information, etc., can real-time visual simulation shows the air compressor, pump and fan and other large equipment system simulation.

The control system of the obvious features are the individual subsystems are able to maintain control of the opposite and independent, you can set the remote control and networking can run independent of local control, each subsystem does not interfere with each other.

Use the industry to do the "high level IPC monitoring", and with high quality PLC Siemens S7 series "physical level" sampling and control, both control and data processing with the use of complementary advantages, can be used to perform large-scale equipment monitoring can be said to be the true worth and complement each other. Background of industrial control computer, the predecessor of PLC controller and fan data acquisition card, its CPU watchdog timer function, you can implement the host because the software failure and panic the system in the intervention of automatic reset.

Master control system for operating system software for Windows2000NT systems, industrial control software is the most widely used version of "the King", and in particular facilitate 6.02 software development.

Video system for digital video portion of a unique modular design, the use of advanced multimedia software and hardware technology, solves monitoring system because of repeated use of videos which are easy to produce picture is not clear, managing complex and expensive, and so on, you can implement manual video, scheduled recording, video, mobile video, and deploying alarm linkage video, has registered a full automatic deletion feature, camera and PTZ control functions, software, anti panic and powerdown after auto recovery boot functionality. Its advanced network performance, can data dedicated line, telephone lines and broadband Internet transmission of images.

2 KJ56-mine monitoring systems

In order to meet the needs of small and medium-sized coal mine site, Shandong University of science and Yanzhou mining (Group) company Tang village mine has developed a set of low-cost, high reliability, simple structure, easy to maintain by KJ56-mine monitoring systems, have better prospects of promotion.

The entire system is made up of seven sub-station and 40 sensor, measuring parameters including wind, gas, current and voltage, device start stop, door opening and closing, vapour pressure, air pressure, winch start stop as well as their operation, and so on.

The system's Control Center computer for ground, namely the system host via communication interface and various substation for data communication. Sub-station are 2 core communication cord hook together, do not touch each other. System of the host first according to the substation and sensor connection ports on sub-station of defined measuring points, defining content including points, Ko measure measurement point of Terminal number, order number, analog or switch quantity, etc. Define complete after select "initialize" menu on each substation then initialized. Initialization is successful, the branch will give host to define parameters into to keeping without loss of data storage. When power sub-station because failure to transmission, the SCM can automatically remove the old system-defined parameters for loop monitoring without system host then initialized.

KJJ12-communication interface is connected by a host of a communication signal converter, and a host of communication using ordinary RS232 standard interfaces, and communication with intrinsically safe Act, two-wire baseband signal; the optocoupler circuits, with the master, slave machine automatic switching functionality and communication indicates, communication error rate is relatively low.

In the monitoring and control system, SCM is within the Act does not allow the panic fault, they design a reliable microprocessor automatically reset circuit. Among them, the oscillator will normally work intervals (can be adjusted) output a positive impulse to the reset circuit, MCU reset. Single-chip on the working time is continuously output a zero pulse to the oscillator, oscillator outputAll are low level, only in single-chip panic when the oscillator is able to work properly.

3 pumps of the application of the automatic monitoring system

In the underground of the pump room, pump motor needs according to the water level changes frequently starts, the steps more cumbersome, environmental conditions, temperature, noise is relatively high, staff easy fatigue, especially in case of floods left unattended pumping station is also very dangerous.

Yanzhou mining (Group) company Jining III coal mine of pump Automation control system reduces the burden on workers, unattended, for all ore networking monitoring and digital development laid the Foundation, in a real application also has a broad prospects.

The entire system consists of data collection and monitoring, site monitoring and control, remote monitoring and command, etc., with automatic and in-place two operation modes.

By industrial computer under the water level to automatically restart, stop the pump and automatic pump rotation work, make reasonable dispatch. The system has an overload and undervoltage, overtemperature protection such as leakage and, when the above conditions or motor failure when the ability to automatically stop the pump running, at the same time start the alternate pump. Scene control center will be collected data and scheduling policy to floor command center, and can be synchronized displays the health of the pump. The system keeps the device in the original manual control mode, so that if necessary you can manually control the realization of the normal operation of the pump. System software and the client software interface all Chinese visual interface, users can clear the Chinese function displays full monitoring operations.

[1] [2] [3] [4]