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基于DH+总线的掘进工作面多局部通风机监测监控系统的研究
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摘要
本文研究的内容是山西省晋煤集团科技攻关项目“井下电网及局部通风机综合监控系统(三巷掘进工作面多局部通风机监测监控系统部分)”(编号:20061177)中的主要内容,是针对晋煤集团寺河矿安全生产监测监控系统不具备对掘进工作面多局部通风机远程监测与控制功能而提出的。随着矿井生产技术的快速发展和装备水平的不断提高,高产高效综合机械化采煤工作面不断涌现,与其配套的多巷道同时掘进采煤工艺得到了广泛应用,同时也对掘进通风提出了更高要求。尽管目前采用了先进的多局部通风机集成控制系统进行控制,但它只能就地控制,缺乏远程控制功能,而且没有数据记录和运行历史查询功能,出现故障后,无法从历史记录中进行查询和判断,给排除故障造成了许多困难。此外,它不能与地面调度室进行联网,管理和调度人员无法及时了解井下局部通风机的运行状况,更无法在紧急状态时对其进行控制。由此可见,研究掘进工作面多局部通风机监测监控系统对确保煤矿生产安全、提高生产效益具有非常重要的现实意义。
     我国目前所采用的煤矿安全生产监测监控系统只能监测矿井的环境参数,如瓦斯、粉尘、风速、负压等信号,而不能对掘进通风关键设备进行监测与控制。为此,本文开发了掘进工作面多局部通风机监测监控系统,弥补了这一缺陷,主要研究内容如下:
     开发了PROFIBUS-DP现场总线型监控子网,该总线为开放型现场总线,方便了现场设备的更新换代;确定了合适的子网主从站模块,并对多局部通风机集控系统进行了合理改造,实现了与原监控系统的资源共享,避免了网络硬件的重复投资;实现了DH+网络节点间的数据共享,方便了系统资源的综合利用,有利于系统的功能扩展;设计了基于本质安全型PROFIBUS调制解调器PBM01模块的远距离数据传输系统,避免了高瓦斯工作面光缆熔接问题,解决了PROFIBUS-DP协议电信号不加中继器的长距离传输难题。
     按照功能模块化设计思想编制了子网主从站软件,方便了系统调试和软件升级,有效缩短了程序扫描周期,提高了系统运行效率;设计了动态、形象、直观的RSView32上位机监测监控画面,提高了人机交互性,缩短了系统故障排查时间,提高了工作效率;提出了“现场控制优先,特殊情况远控优先”的控制策略,实现了现场控制与远程控制之间、远控单台时互为热备的两从站之间的多重闭锁,提高了系统运行的安全性、可靠性。
     本文设计的掘进工作面多局部通风机监测监控系统在寺河矿进行了现场调试,调试结果表明:系统结构合理、监控画面形象生动、数据监测实时准确、远程控制安全可靠、系统维护方便、网络兼容性好且可扩展性强,最大限度地确保了掘进工作面多局部通风机运行的连续性和可靠性、保证了工作面的不间断通风及矿井安全。
The research project in this thesis is an important part of "The monitoring and control system of underground power distribution network and local fans", i.e. monitoring and control system of multi-local fans of the heading face (serial number 20061177), which is sponsored by Shanxi Jincheng Mining Corporation Group. The work is proposed in accordance with the problems that the PlantScape R400 monitoring and control system of Sihe coal mine can't monitor the running status of multi-local fans and control them in the heading face. With the development of mining technology and the improvement of mining equipments, more and more fully mechanized faces of high-production and high-efficiency have appeared. Mining technology of multi-tunnel digging simultaneously has been mature and used widely, which requires more strict demands on safety and continuity of ventilation. Advanced integrated control system of multi-local fans has been developed to realize field control, however, it still has no functions of remote control, data record and history examining. When faults occur, it is difficult to look over the history records and make correct judgment, which will bring a lot of troubles to get rid of the faults. Meanwhile, it can't be connected with ground control center so that supervisor can't know about running status of local fans in time and control them in emergency. It is, therefore, very important to develop the monitoring and control system of multi-local fans so as to improve safety and boost productivity of underground mining industry.
     At present, most of monitoring and control system in coal mine could only monitor environment parameters in domestic market, such as methane concentration, wind speed, negative pressure and so on, however, it can't control underground pivotal equipments. In order to resolve the problems mentioned above, the monitoring and control system for multi-local fans has been developed in this thesis, which fill in the gaps in the field of electronic technology in our country.
     The monitoring subnet based on PROFIBUS-DP field bus has been designed, which make equipment updating convenient due to its opening property. The suitable CPU modules of master and slave station have been determined and the integrated control system of multi-local fans has been reconstructed, the subnet can share the network resources with the former monitoring system, which avoids repetitious purchase of system hardware and makes function extension easier as well. In order to avoid fiber fusion in gas circumstance, the intrinsic safety PROFIBUS modem PBM01 module is adopted, which solves the problem of long distance communication without repeaters at the same time.
     According to blocking design methods, subnet software is compiled, which makes software debugging and upgrade easier, and heighten running efficiency of monitoring system at the same time. The monitoring display based on RSView32 are designed to enhance man-machine interaction and shorten the time of faults elimination. The strategy of field control priority combined with remote control priority under emergency condition is proposed which solves the conflict between field control and remote control, carries out the multi-lockout between two integrated control systems and improves the running safety and reliability of the monitoring system.
     It has been proved by the field tests in Sihe coal mine that the monitoring system is reasonable in design, visual in monitoring display, exact in data monitoring, safe in remote control, convenient in maintenance, high in compatibility and expansibility of networks. The system developed in this thesis can greatly improve the continuity, reliability and safety of ventilation in the heading face.
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