Research Of Safety Monitoring And Warning System On The Main Hoisting System Of Metal Mine

With the fast development of the social economy, the energy demand is becoming larger day by day. As a kind of important basic energy, mineral resources play a key role during the improvement of the social economy. Therefore, whether mineral resources can be extracted safely is one of important factors for the fast development of the society. As the main thoroughfare for the safe transportation of the safety production, whether the mine main hoisting equipments operate normally at work will directly impact the mine safety in production and the output of mineral resource.The mine hoisting technology of China has developed fast since the P.R.C founded.Fushun Heavy Mechanical Complex made the first single rope winding type elevator which imitated the Soviet Union in 1953, till now well tower type elevator, Console-model elevator, multi-rope winding type elevator all can be made in China. During the 50 years or so, the Chinese mine hoisting technology improved fast, and are becoming the most advanced technology in the world.During the period, although the hoisting technology improved fast and the hoisting equipments enlarged and integrated gradually, the number of the mine hoisting accidents was rising, casualties were growing and wealth was losing yearly. According to incomplete statistics, there are more than 10.000 metal mines presently, and huge social benefits have been created by that. Meanwhile, the deaths which were caused by the accidents of the hoist and transportation on metal mines are only less than the coal mines.Because of the accidents, the direct losses has increased to 100 billions, and the losses caused by injuries and deaths are astonished that it has past 1% of the GDP.However, the whole world's actual situation indicated that the development of the technology on safety monitoring and warning is much slower than the progress of the mine hoisting technology, especially in China,for example,there isn't monitoring system which can monitor the hoisting equipment roundly at present in China.For all this, the safety monitoring technology on mine hoisting equipments has improved partly, it also obtained some research results such as "the KTA-UP series mine hoist safe supervisory system installment", "the M12-3B elevator synthesis reserve protection meter" and so on. These observation systems or installments can make quite good progress on the partial monitoring, but mostly have the following insufficiency:(1) Monitoring systems of hoisting techniques are very fragmentary, and aim at only one or several parts' monitor of mine hoisting equipments, like hoisting cable observation system.(2) The low reliability and stability of the data transfer of monitoring systems(3) Monitoring systems are not easy to transplant and promote.(4) the system is easy to make mistake for the software interface is unfriendly and the operation is complex,(5) The choice and design of development tools are not reasonable, so various systems are incompatible or badly compatible.(6) The systems can't be extended or extended badly.Base on the austere situation of safety monitoring technology on mine hoisting equipments and full research on the supervisory systems of the domestic mine hoisting equipment, taking the ChengChao iron ore for example, a set of safety monitoring and warning system on the main hoisting system of metal mine has been developed, in order to provide references for the development of safety monitoring and warning technology on mine hoisting equipments.The study is carried out according to the above-mentioned project, and the research is mainly as follows:1. Pre-task preparationThe main work of the period is as follows:â‘ Field research. Familiar with the structure of the hoisting equipment, the materials about the hoisting equipment and monitoring technology were collected.â‘¡Consulting literature:after massive domestic and foreign literature being consulted, the current monitoring situations of the hoisting equipment were found out, and the most recent development tendency.Besides,the problems of the current supervisory system has been discovered.â‘¢The purpose, content and technical route of the study has been determined.2. Project research and developmentThe main work of the period is as follows:(1) Fault analysis of the main hoisting equiomentThe professional fault analysis methods of safety engineering were taken to apply to the fault analysis of the main hoisting equipment. The braking system, the hoisting cable, the hoisting container, the electric control equipment as well as the derrick and sheave's breakdown were analyzed separately by the fault tree analysis (FTA) or the failure mode and effects analysis (FMEA). Consequently, the basic events (inducement of failure) resulting in the top events (main lift technique's breakdown) were obtained, which is the underlay for the establishment of the monitoring system.(2) System total designThe prime task in the system total design stage includes: â‘ The system's development tools and the software application platform have been selected. The configuration software MCGS6.0 and Microsoft Visual Basic 6.0 are used to develop this monitoring system, Microsoft SQL Server 2000 was taken as the development platform of the database. The monitoring system will be able to apply to Windows 98, WindowsNT4.0 (sp3) and above the systematic service platform.â‘¡The design on the hardware framework of the system was carried on.â‘¢The entire software system design was implemented. It includes several parts as follows:(?) System requirements analysis:The system requirements analysis were carried on, according to the security situation of the main hoisting equipment of the Chengchao iron ore and the mine authorities' request.(?) Selection of monitoring parameters:Based on the requirements analysis,the monitoring parameters of the system were selected.(?) Monitoring project design:the safety monitoring system was implemented from the running status, the braking system as well as the hoisting cable of the main hoisting equipment.(?) Software structure design:the software gross structure design of the monitoring system was carried on.(3)System implementationThe main task of the period is as follows:â‘ hardware selection:according to the monitor purpose, the field environment and some other factors, a whole set of monitoring facilities such as the sensors, the data acquisition card, the industrial control computer and so on were selected for this system, and the main technical parameters of each equipment was introduced.â‘¡software implementationThere are three parts as follows:(?) Based on the overall design, the monitoring alternative of the system has been introduced in detail from the running status of the hoisting equipment, the hoisting cable as well as the braking system of the hoisting equipment, and the implementation of each monitoring function has also been expounded in detail.(?) Warning processing:the different warning processing methods are designed separately in view of four kinds of breakdown in different situations.(?) Functional module design:the functional module is designed separately from eight aspects of the failure diagnosis, the data processing, the database management, the system monitoring, the animation demonstration and so on.â‘¢Anti-jamming technology:the anti-jamming technology has been carried on from the two aspects of the hardware and the software to shield the interfering signals, and achieving the anti-jamming goal. 3. Field debugging and applicationThe main work of theperiod is as follows:After the system development completed, the field installation was done, and the safety monitoring and warning system of the main hoisting equipment on metal mine has been set up. The results of the preoperation indicated that the system could satisfy the request of the field environment and achieved the anticipated monitor purpose.