Bottom coal stability discrimination method and system based on sharp point mutation

The invention relates to the technical field of coal mine safety, and provides a bottom coal stability judgment method and system based on sharp point mutation. The method is used for judging the bottom coal stability of a roadway under the blasting disturbance condition, and specifically comprises the following steps: establishing a numerical model of a roadway coal seam beam based on a constructed deflection failure model of roadway bottom coal; determining a bottom coal stability threshold value of the roadway according to the numerical model of the coal seam beam based on a sharp point mutation theory; according to the obtained bottom coal mechanical parameters and the bottom coal stability threshold value of the roadway, the bottom coal stability of the roadway under the blasting disturbance condition is preliminarily judged. The whole judgment process is simple, feasible and easy to operate, the limitation of site construction parameter selection is avoided, the defects of resource waste, unexpected bla