Method for generating two-dimensional ultrahigh volume fraction hybrid rock numerical simulation model by adopting overlapping contact cutting algorithm

The invention discloses a method for generating a two-dimensional ultrahigh volume fraction hybrid rock numerical simulation model by adopting an overlapping contact cutting algorithm. The method comprises the following steps: randomly generating a polygonal aggregate framework according to preconditions such as a given grain composition curve; coordinate information of the polygonal aggregate frame is recorded, discrete element software is imported, the aggregate frame is placed in a boundary area wall, and aggregate particles are converted into rigid clusters; dEM simulation is carried out, so that the aggregates can freely collide until the aggregates are balanced, and distribution position information after cluster collision is recorded in a geometric file; and then judging the contact property of an aggregate entity in the geometric file by calling an aggregate contact judgment algorithm developed by a Python language, and cutting the aggregate with contact and overlap amounts to finally obtain a high-vo