基于现场 CAD 矿图的矿井通风信息转换提取.

In order to solve the data problem that is callable from CAD map to TF1M3D ventilation simulation, it is proposed to mark the structure of the system and all the ventilation information of the mine when drawing the single line map of the mine from the original CAD map. The roadway is expressed by solid line, which gives roadway elevation and connected relation in entity; air duct is expressed by polyline; resistance gate (i.e. air door, air window or adjusting door, etc.) and ventilator are expressed by circle, in which the resistance gate is identified by the least distance between the center of the circle and the roadway line according to the cosine theorem, captured at the end of the tunnel according to center of a circle to identify ventilator, the main fan is at the independent end. According to above rule, Matlab program TF1M3D_dataDXF.m that extracts the DXF file information of mine single line drawing is composed. The practical application indicates that mine roadway topological information and all ventilation parameters can be recognized by scanning the DXF file, filtering to find the symbol codes AcDbLine, AcDbText, AcDbCircle, to fast realize rapid modeling of three-dimensional mine roadway network and ventilation system, which can conduct seamless joint with TF1M3D calling requirements. [ABSTRACT FROM AUTHOR]