Digital Coal Mine Integrated Automation System Based on ControlNet

Jun.2007Jourmal of China University of Mining TechnologyVol 17 No.2Availableonlineatwww.sciencedirect.comSCIENCEdDIRECT.J China Univ Mining Technol 2007, 17(2): 0210-0214Digital Coal Mine Integrated AutomationSystem Based on ControlNetCHEN Jin-yun, ZHANG Shen", ZUO Wei-raSchool of Chemical Engineering and Technology, China University of Mining Technology, Xuzhou, Jiangsu 221008School of Information and Electrical Engineering, China University of Mining Technology, Xuzhou, Jiangsu 221008,uniform transmission network and a uniform data warehouse, An actual, ControlNet based transmission network n,'aAbstract: A three-layer model for digital communication in a mine is proposed. Two basic platforms are discussed: Aform suitable for the Jining No. 3 coal mine is presented. This network is an information superhighway intended to integrate all existing and new automation subsystems. Its standard interface can be used with future subsystems. The net-work, data structure and management decision-making all employ this uniform hardware and software. This effectivelyavoids the problems of system and information islands seen in traditional mine-automation systems. The construction ofthe network provides a stable foundation for digital communication in the Jining No. 3 coal mine.Key words: digital mine; integrated automation; uniform transmission network platform; uniform data warehouse platCLC number: TD 6791 Introductionby professor Wu Lixin and the seven layer modeladvanced by Mr Seng Dewen, shown as Fig. 1ba digital mine(DM) is one where all interrelatedThese DM models have effectively driven the decommunications are in digital format!. Production, velopment of concepts and the popularization of DMsafety, geography, geology, construction and the like But it is obvious that there are some limitations toare linked by digital information systems. The es- these models. For example, they lay particular stresssence of a dM is to use information and automation on narrow subjects and pay no attention about how totechnologies along with modern control theories both apply a dm to a given mineto describe and control the mine operations system-Therefore, for the realization of a dM we proposeatically and dynamically. This enables highly effec- a three-layer digital mine model (TLDMM)shown astive, safe green mining and ensures continuing im- Fig. 2. In Fig. 2 the lowest layer is the informationprovement in mine economics. It also allows undercollection and command dissemination layer. It colstanding and protection of the natural mine ecosys- lects the information from each production and safetysub-system and delivers the feedback control signalsUp to now, the digital mine models proposed by to the sub-systems. All of the information and conothers are too academic to manipulate. Given the de- trolling signals are transmitted through a uniformmand of digital mines the construction of a practical transmission network. Although 14 sub-system modthree layer digital mine model is proposed by us. Two ules are shown in Fig. 2, the number of modulesbasic platforms, a uniform transmission network could be increased or decreased according to the de-platform and a uniform data warehouse platform, are mand of a given mine. Most of the sub-system inforpresented and discussed for the constructing of a DM. mation in this layer is collected automatically; however it is acceptable that some of the sub-system in-2 Three Layer Digital Mine Modelformation and data are entered manually. It is possible to integrate various production and safety subSeveral digital mine models have been proposed by systercontrol network transmission platdifferent authors and experts. These include the five forn中国煤化工orm, network basedconcentric circle model, shown as Fig. la, proposed colleCNMHGject 50574094 supported by the National Natural Science Foundation of ChinaCorrespondingauthorTel+86-13912044490:E-mailaddressjinyunchen@126.comCHEN Jin-yun et alDigital Coal Mine Integrated Automation System Based on ControlNetDsL epision时osseManagement system& OACLComputer dispatching and monitoringCADPDL Production design plans, system simulationDeposit and geologic modelsDaL Data acquisition, data preprocessing, DB(a) Five concentric circle modelb)Seven layer modelFig 1 Two kinds of DM modelsProduction dispatchPower managProduction plaVentilationmanagFault diagnosisVRMEnterpnse managData warehousentegrating layerData miningDipatching networkInformation fusionControl network transmission platformafetyVenti.‖ Drain/lIft‖powr‖peqamonitor system systece system system plantnformation collecting andsysterure lacationTransp. moniFig 2 Three layer digital mine model (TLDMM)The layer in the middle is an information integrat-ing layer. It is clear that each sub-system operates niques are the key technologies in the informationusing its own data structure. For the DM mentioned integrating layer. The value of information comingabove, the data in the integrated automation system from mine locales and their interrelated environmentsshould have a standard format and be processed in a is enhanced in this layerstandard way in order to enable seamless integration The uppermost layer is a management and decisionof sub-systems. For example, when we want to making layer. As we have mentioned, the value ofevaluate the mine safety status on line, the informa- inforin the informationtion we need comes from several different sub-sysInteg中国煤化工 the enhancementtems, such as the environment monitoring system, the to alleCNMHGdescribe and con-ventilation control system, the mine pressure moni- trol soully the managementtoring system, the underground water outburst and and safe production of the mine, to ensure continuouswater level monitoring systemaprovement of mine economy and to insure the sta-212Journal of China University of Mining Technologyol. 17 No. 2bilization of the natural mine ecosystem. The soft- faced to one of the first two networks. Therefore,oneware modules listed in Fig. 2 are for this purpose. or the other of these standards is proposed for theJust like the sub-system modules in the information control network in the DMcollecting and dissemination layer, the number ofThe dispatching network is an Ethernet wsoftware modules in the management and decision forms the center of dispatch and control of the minemaking layer could also be increased or decreased Data servers and the data base are located on thisaccording to the demands of a given mine.network. The workstations for the human machineSeveral aspects of the TLDMM shown as Fig. 2 are interfaces for operators of each installed sub-systemsimilar to other dm models we have mentioned, the are also on this network. the information collectedcharacteristics of the TLDMM are described as fol- by the control network is transmitted to this networkand displayed on relevant workstations. The controlFirst, the TLDMM is not an unalterable model, Its commands are sent from here to the control network.cale could be adjusted by adding or removing The redundant deployment of data servers, switches,ub-system and software modules given the factors of workstations and software is very important for thea the scale of a particular mine, level of moderniza- stable operation of the systemtion I and mining technology. Therefore, using thisGenerally, an intranet already exists for almost allmodel to develop a dm is appropriate for various and mines. All application software modules are runningdifferent kinds of mineon the Intranet. The Intranet could be connected toSecond, it is apparent that there are two basic plat- the Internet through firewalls. Obviously each layerforms in TLDMM, one is a uniform transmission in the tLdMM is running on one part of the netnetwork platform while the other is a uniform data works as shown in Fig. 2warehouse"platform, an operating database completewith its infrastructure. The two platforms are the4 Uniform Data Warehouse Platformfoundation of a dmTo integrate various data types arising from theThird, the model crosses major fields. All profes- different sub-systems, data warehouse and meta-datasionals of these different subjects can play a role in technologies are needed. Data warehouses are com-the modelputer based information systems that are home forFinally, the model is suitable for digitizing the en- "secondhand"data that originated from either anothertire mine. The technology may be introduced stapplication or from an external sub-system or source.wise as the mine is developed or retrofitted to exist- Warehouses optimize database queries and reportingIng situations.tools because of their ability to analyze data, oftenfrom disparate databases and in interesting ways.3 Uniform Transmission Network Plat- They are a way for managers and decision makers toformextract information quickly and easily in order toanswer questions about their management and operaThe uniform transmission network platform is tion of the mine. Data warehouses are analytical,composed of three parts: the control network, the subject-oriented and structured to aggregate transacdispatching network and the intranettions as a snapshot in timehe control network is connected to each sub-Meta-data is the data about data which describesproduction and safety system to collect information the content, quality, condition and other characterisfrom and send commands to. these low-level devices. tics of data from different mine sub-systems.ItAt present, there are four different kinds of net- plays an important role not only in the design,im-plementation and maintenance of the data warehouse,They consist of an industrial field-bus, an industrial but also in data organization, information queryingEthernet(100 Mbps or 1000 Mbps), a SDH based and understanding of the results. It usually recordsMSTP and EpON5-6) The first two have been used in the location and description of warehouse systemdustry for many years. There are many industrial componentsprotocols and applications using these two networksThe uniform data warehouse platform integratehich are supported by many international corpora- many data mining methods, supports On-Line Ana-tions and companieslytical Processing(OLAP) for multi-dimension dataThe latter two networks have been developed for and decision-making for high-level mine users, asprovide a data transmission path. For data collection sucs" n in Fig 3. It includes the data mining functions,data transmission and access. they are used only to shotgasification, fault-diagstill need to adopt the techniques of nos中国煤化工ssociation rules andfield-bus protocols or industrial Ethernet protocolsCNMHActually, these days, many low-level devices and alsd.decision-making sersystems in mines are based on field-bus or industrial vices for evaluation of the mine safety statusEthernet. Hence these devices can be directly inter-CHEN Jin-yun et alDigital Coal Mine Integrated Automation System Based on ControINet5 An Example of Digital Coal Mine Inte-Data mining integrated toolgrated Automation SysterOLAP visualization tooFig. 4 is a diagram of the digital coal mine inte-grated automation system for the Jining No. 3 coalmine. The purposes of constructing the system are: 1)Subject sUbject2」saisto build the hardware and software platforms for theM; 2)to integratepal mine automationData ware housesub-systems into the hardware platform; 3)to buildsome new automation sub-systems and access intoData extraction, transformation and loadingthe hardware system; 4)to monitor and control allthe surface dispatchOutside datathereby reducing the number of operators underground and 5)to integrate all data from differentFig 3 Uniform data warehouse platformsub-systems into a uniform data warehouse for laterdata mining and information fusionDL P Projector and video monitor system Video monitor control system口gggg回■ Data serversVentilation control systemTube monitoring systemSurtace controlNet ringSurfacePress air control systems Water drainEast belt KZF283# North beltCenter waterdrain controlUnderground west sidecontrolNet ringontrolNet ringWest belt control svstemwo north belt control s16# Face powerNIDISA-2 control systemsystemEnvironment monitoring Environment monitoringFig. 4 Integrated automation system based on ControlNet in the Jining No. 3 coal mineThe control network is based on a Rockwell Corredundancy of the control network that is especiallytrolNet composed of three rings, one for surface ser- important for coal mine underground networksvice and two for underground operations. Most of theThere are 12 ControlLogix control substations andcontrollers in the rings are ControlLogix and SLC 5 13 DH+ monitoring substations. The three rings are(only for environment monitoring). The basic data connected through gateways by the dispatchingrate of ControINet is 5 Mbps based on a Producer/ Ethernet as shown in Fig 4. The switches, serversConsumer communication modelgateways and workstations are all redundant. TheThe Rockwell ControINet uses a NetLinx open operating system for the server is the windows 2003network system architecture. NetLinx is a kind of Serve中国煤化工 rkstations and iFIXadvanced industrial network architectures to provide confia series of network services, CiP protocols across inforCNMHcommands to eachdifferent network layers and open software interfaces sub-systemfor different sub-systems. The ring structure supportsA SoL Server combined data warehouse is used asJournal of China University of Mining TechnologyVoL 17 Noa historical database. All sub-systems in the Jining interface shown in Fig. 5a. Fig. 5b shows the beltNo. 3 coal mine are integrated into a uniform trans- system controlling the interface after clicking the beltmission network platform as shown in Fig. 4. All system button in Fig 5a. The HMI interfaces are thesub-systems can be accessed through a uniform HMI same in all workstationsCenter of Safetya)A uniform HMI interface(b) Belt systemg 5 HMI interfaces of the system6 Conclusionsall existing and new sub-systems and to providestandard interfaces for future sub-systems1)After consideration of the existing DM models a4)An SQL embedded data warehouse server isnew three layer digital mine model (TLDMM)was used as a historical database for the integrated auto-proposed. The model is more practical than other ex- mation systemisting DM models. Coal mine operators can build5) The demonstration has proved that the"subtheir own DM stepwise according to the model2)As discussed above, during the construction of a traditional coal mine automation systems can beavoided effectively. The realization of the intemission network platform and the uniform data automation system has built a stable foundationwarehouse platform, are most important. They are thebasis of the DM and are cross specialties. The funcdigital mine for the Jining No. 3 coal mine.6) The discussion also shows that a DM can betion as well as the importance of the two basic plat- built step by step according to a practical model.Theforms was discussed3)A real, ControlNet based network transmissiontwo uniform platforms of hard ware and soft ware arethe most important aspects of the dm. They are theplatform is established for the Jining No.3 coal mine basis of the dmfollowing the proposal of a TLDMM. 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