The invention discloses a block
system construction method suitable for various
structural plane models, and relates to the field of three-dimensional rock block recognition, and the method comprises the steps: firstly classifying
cutting planes and establishing a
database based on the geometric data of an existing
structural plane system model (DFN) and the data of a calculation region, calculating the intersection lines and intersection points between the
cutting planes, and calculating the intersection lines and intersection points between the
cutting planes; a vertex matrix of the block
system is constructed, then vertexes are connected to form directed edges, closed surfaces are constructed based on the directed edges, and a polyhedron is constructed through surface combination. And finally, the conversion from the
structural plane system to the block system is completed by outputting a complete
geometric element matrix. Theoretical algorithms are adopted in the method, and only structural plane and calculation area data are used as input, so that the method is objective and simple to operate and easy to program. Compared with the prior art, the method breaks through the limitation of a traditional structural plane model, and can be suitable for various structural plane models including a disc structural plane model, a polygonal structural plane model and a general elliptical disc structural plane model. The calculation method disclosed by the invention can provide a preprocessing general normal form for rock
mass stability analysis. A proper structural plane model can be selected according to
engineering requirements, a rock block system closer to a real rock
mass is further provided, and the adaptability and reliability of block system modeling under complex geological conditions are improved.