Research And Application Of Visualization System Of Mine Ventilation

Yang Quhe Mine of Hebei Fengfeng Group is the high gas outburst mine.The mine ventilation system is mergered from Yangyi mine,Yanger mine of mine ventilation systems,and is the most complex mine in the country,and mine ventilation usual management is very difficult.In recent years,with the depth of mining increasing,ventilation networks is becoming more complex,mine ventilation difficulty is becoming increasingly large.Although increasing the intensity of reform of the ventilation system,and have achieved some progresses,but not solute the current difficulties fundamentally.There are still a large number of issues in ventilation safety management,such as ventilation information management backward,ventilation network solution;air regulation is still not automated,and so on.This situation greatly affects the objectivity of analysis,strategic decision.In particular,if there were abnormal situation,the deviations of strategic decision may result in the occurrence of major accidents.To address the various problems in the mine ventilation system management,improve ventilation systems' information management standards, and achieve ventilation network solution,air regulation automation,researching and developing advanced,high-efficiency,pragmatic new generation of mine ventilation Visualization systems becomes the key.At present,some domestic research institutes have developed a lot of ventilation secure category software.These softwares have been implicated extensively in the domestic coal industry, and have achieved some good results,but there are also the following deficiencies:1.Worse usefulness,difficult to fundamentally solve the various issues in the mine ventilation;2.General used only for simple mine,in the complexity of the mine;3.Less visualization effective,three-dimensional feature is no;4.The weak ventilation dynamic simulation showed function;5.Are only in stand-alone operating environment,weak networking,data sharing difficulties, poor security;6.Software interface is unfriendly and complicated to operate;7.the lack of unified planning,and mine to monitor and control system for effective integration category;8.the weak mine ventilation decision-making functionsThis topic analysis" the actual situations of Yang Quhe Mine ventilation system in detail,and learns from the domestic counterparts' experiences in the development of ventilation secure category software,Take the object-oriented programming language Visual C++ as development tools,take the advanced fourth generation of GIS technology and 3D visualization technology as support,and propose mine ventilation system 3D visualization,mine ventilation management information and ventilation network solution automation,also,under the Windows operating platform,develop a GIS-based Yang Quhe Mine digital ventilation system.The paper mainly does the following several works.1.Initial preparationsThis phase does the following works:①scene investigation,collecting ventilation maps,and roadway spatial information and various types of report forms and other related materials.②research status at home and abroad,understand latest developing trends in the field of ventilation security software;③identify issues purpose of the study,study line,identify issues the content of the study and key technologies in detail④identified R & D technical requirements,guarantee the accuracy of the software,availability and security.2.Ventilation network theory studyVentilation network basic theory is the foundation of the entire software development,these body introduce mainly the following aspects①mine ventilation basic theories,including the balance of the law of wind,air pressure balance law,the law of conservation of energy law and three ventilation resistance law;②The concept of ventilation network and the map of ventilation systems and ventilation network;the nature of the ventilation network;the storage of ventilation network in the computer③The basic theory of the mine fan operation;④principle of ventilation network solution and network-conditioning.3.System overall designOverall design is an important component of the software design,is the key step of guaranteeing the software quality,this phase mainly complete the following work:①set the principle of the system design,according to mine information and user requirements analysis demand;②complete the overall structural design of the system,depending on the functions of the system divide the system into three levels in logic,namely,the database layer,MAPGIS platform layer and business application layer;③mine ventilation management involves more information, the paper execute structure design according to different nature of the data,ease to storage and use.④the development of the system take MapGIS7.0 as the platform,and use Microsoft Visual C + + language,and make requirements for the necessary software,hardware and support environment of the system running.4.Functional modules mathematical model and visualization implementation System study the relevant functional modules mathematical model and its visualization program flow,specifically including:①ventilation network mapping module mathematical model and program flow;②fan performance curve dealing with mathematical models and program flow;③ventilation network solution model and its flow chart;④ventilation network regulation mathematical model and its flow chart.5.System testing and function displayTopics take multidimensional space modeling and more powerful the fourth generations of GIS technology - MAPGIS7.0 as basic platform,syncretize the most advanced virtual reality(VR technology)technology,realize multiple functions.(1)Ventilation system dynamic three-dimensional visual simulation.①According to roadway space topological relations documents,can quickly generate accurate and realistic roadway model,can also build the fan,structures and equipment models externally(AutoCAD,3DMax and other software),and directly import virtual roadway;②system provides the scaling,rotation, translation of three-dimensional roadway,supports mouse and keyboard operation.③System can realize roaming function,supports automatic roaming,rogatory roaming and interactive roaming;④can achieve inquiries roadway,fans,the management structures,and other models in the three-dimensional scene;⑤system has he function of automatically updating the direction of airflow.(2)Ventilation management information.system take GIS as basic platform,using large relational database(SQL Server)information related to the ventilation space,graphics,attributes and statements collate data,in storage, management.Including:①spatial information,including roadway node coordinates information, fan,equipments,and other location information management②graphic data management, including two-dimensional diagram of the mine ventilation system,mine ventilation network and other related mine ventilation map,three-dimensional diagram,③attribute data management. Including ventilation,fire prevention,fan performance measurement.④report forms information management,can handle usual 30 kinds of report forms of ventilation work area,the mine security departments computer storage,computing,statistics and analysis.(3)Topics develop a computer network solution module,according to mine ventilation network basic information calculates accurate required information of mine ventilation information,as follows:①automatic generate mine ventilation network diagram;②automatically elect loop;③automatically calculate initial air volume;④automatically handle fan characteristic curve;⑤automatic iterative calculate branch wind value;⑥automatically calculate branch ventilation resistance.When the network solution result show that the wind is inadequate in the wind tunnel or excessive in general branch,it is necessary to do ventilation network conditioning,makes all the branches wind of ventilation system tend to balance supply and demand.There are three major adjustments,that is,by increasing the resistance,reducing the resistance and increasing energy to adjust.This subject will prepare a network conditioning modules,importing the solution results to conditioning modules,the system automatically adjust roadway branch to be resolved,and calculating△h.①When the resistance adjustment△h＜0,the measures of increasing resistance will been taken,adjustable wind shutters should be installed,and according to the value,calculated wind shutters open area.②When the resistance adjustment△h＞0,the measures of reducing resistance will been taken,the fan-conditioning will be installed,the deigning fan pressure should be△h.