The invention discloses an underground communicated roadway elaborated modeling method based on string course data actual measurement. The method comprises the following steps that a top, a bottom slab center line and point three-dimensional coordinates on two side string courses of a mine roadway are measured; a closed bottom slab
border line of the roadway is constructed; a node-
path network topological
relation graph is constructed, communicated paths in the topological
relation graph are extracted, and local fracture
surface contour lines are constructed between the communicated paths andthe bottom slab
border line; space gridding is extracted between two neighboring contour lines, data
encryption is performed on the space gridding, transition contour lines are added, and hook face triangularization is performed on the space gridding; the closure bottom slab border lines are divided into a plurality of single polygons, and the triangularization is performed on each polygon; all local triangularization models are combined, and a
solid model of the communicated underground roadway is obtained. According to the modeling method, a string course actual measurement method is adoptedto collect space data of the underground roadway, the
workload of survey
crew is reduced, and the roadway fracture surface designed parameters are combined, so that the fitting can be better carriedout on the roadway hook face.