Visualization Research And Development Of Mine Ventilation Based On AutoCAD

As the powerful graphics capabilities, at home and abroad, AutoCAD have made most widely used in coal mines. Most of ventilation professional technician have skilled use of AutoCAD, and they are used to its operating mode. With the objectARX Development Kit, a set of mine ventilation visualization software (VentCAD) was developed. VentCAD will be welcomed by the ventilation professional technician.Taking advantage of Object ARX custom entity technology, designed and developed a series of graphics primitive which includes roadway, node, airflow direction, fan, air door, local fan, duct, enclosure, test point and so on. These graphics primitive and that used by ventilation professional technician are basically the same.Topology relationship of mine ventilation net work is automatically established and managed, Passed mine ventilation Topology relationship is established by man who marked roadway start node and end node and formed a file or a database file,graph object,topology relation ship and database were aparted, they were managed by programmer. The topology relationship is established and managed by sending messages between objects,all work is based object's file handle.Several ventilation visualization technical difficulties are resolved. How to closed roadways which has the same node, and local ventilation network simplification and double line roadway blanking are difficulties.