Method for calculating ultimate uniform load on surface of karst cave covering layer

The invention discloses a method for calculating ultimate uniform load on the surface of a karst cave covering layer. The method comprise: establishing a mechanical model of interaction between a karst cave covering layer soil body and a karst cave collapse rock body, adopting rock mechanics and soil mechanics theories to establish ultimate state equations of the karst cave covering layer soil body and the karst cave collapse rock body, establishing a vertical direction balance equation of the karst cave covering layer soil body and the karst cave collapse rock body by using a limit balance principle, and establishing yield conditions of a covering layer soil body fracture surface and a collapse body fracture surface; and establishing a linear mathematical programming model capable of simultaneously considering the ultimate states of karst cave collapse rock mass and karst cave covering layer soil mass to solve the ultimate uniform distribution load of the surface of the karst cave covering layer. Thus, the o